HP LaserJet 4300 Series Specifications

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viii Table of contents Q2431-90912

80 Theory of operation Q2431-90912Printing from tray 1The presence of paper in tray 1 is detected by the tray 1 paper sensor (PS105).When the DC contr

Q2431-90912 Chapter 5 Theory of operation 81Figure 17. Tray 1 pickupSeparation padLifterCamTray 1 pickup solenoidTray 1 pickup roller

82 Theory of operation Q2431-90912Printing from tray 2When the DC controller PCA receives print command, the main motor (M101) and scanner motor start

Q2431-90912 Chapter 5 Theory of operation 83Tray 2, 500-, 1,500-sheet feeder media size detectionMedia size in the cassette are detected by three swit

84 Theory of operation Q2431-90912Lifter-driver operationThe lifter driver keeps the media stack surface at a specific level in order to have a stabil

Q2431-90912 Chapter 5 Theory of operation 85Media skew preventionThe printer uses a registration shutter on the registration assembly to prevent media

86 Theory of operation Q2431-90912Fixing/delivery blockThe paper pickup and feed system is divided into two blocks. The paper pickup tray to the fuser

Q2431-90912 Chapter 5 Theory of operation 87Printer jam detectionThe printer uses the following sensors to detect the presence of media and to verify

88 Theory of operation Q2431-90912Printer delivery wrap jam when feeding regular mediaRegular size media is defined as A4, letter, legal, B5, executiv

Q2431-90912 Chapter 5 Theory of operation 89Printer door open jamIf the top door is opened (this will activate the top door open switch; SW101) during

Q2431-90912 List of figures ixList of figuresFigure 1. Printer physical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

90 Theory of operation Q2431-90912Printing from the 500-sheet feederNote The HP LaserJet 4200/4300 series printers support up to two optional 500-shee

Q2431-90912 Chapter 5 Theory of operation 91The pickup roller, activated by the solenoid, rotates once, picking up the media inside the 500-sheet tray

92 Theory of operation Q2431-90912Printing from the 1,500-sheet feederThe paper-feeder driver controls the operation sequences of the 1,500-sheet feed

Q2431-90912 Chapter 5 Theory of operation 93Figure 25. 1,500-sheet feeder pickup and feed diagram

94 Theory of operation Q2431-909121,500-sheet feeder lifting mechanismThe lifting mechanism maintains the media stack surface at a specific position i

Q2431-90912 Chapter 5 Theory of operation 95Envelope feederThe envelope-feeder driver controls the operation sequences of the envelope feeder. An 8-bi

96 Theory of operation Q2431-90912Envelope feeder pickup and feedingIn the envelope feeder, the envelope sensor (PS901) detects the presence of envelo

Q2431-90912 Chapter 5 Theory of operation 97Envelope feeder jam detectionThe envelope feeder uses the envelope multiple feed sensor (PS902) along with

98 Theory of operation Q2431-90912DuplexerThe duplexer driver controls the operation of the duplexer. An 8-bit microprocessor in the duplexer driver c

Q2431-90912 Chapter 5 Theory of operation 99Reversing and duplexer pickupThe duplexer has two stepping motors: the reversing motor (M701) and the dupl

x List of figures Q2431-90912Figure 54. Transferring the image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

100 Theory of operation Q2431-90912Duplexer jam detectionThe following paper sensors detect whether or not the print media is present and is feeding n

Q2431-90912 Chapter 5 Theory of operation 101Stacker and stapler/stackerThe stacker delivers media from the printer to the stacker delivery bin. The s

102 Theory of operation Q2431-90912The following diagram illustrates the power-on sequence for the stacker and stapler stacker.Figure 32. Power-on seq

Q2431-90912 Chapter 5 Theory of operation 103StackerThe DC controller PCA controls the stacker and sends signals to the stacker driver PCA. The stacke

104 Theory of operation Q2431-90912Stacker feed and deliveryThe stacker feed and delivery system consists of several feed rollers and guides that the

Q2431-90912 Chapter 5 Theory of operation 105Stacker jam detectionThe stacker uses the following sensors to detect the presence of media and to verify

106 Theory of operation Q2431-90912Stapler/stackerThe DC controller PCA controls the stapler stacker by sending signals to the stapler/stacker driver

Q2431-90912 Chapter 5 Theory of operation 107Stapler/stacker feed and deliveryThe stapler/stacker feed and delivery system consists of several feed ro

108 Theory of operation Q2431-90912Figure 36. Stapler/stacker motors, solenoids, and sensors block diagram

Q2431-90912 Chapter 5 Theory of operation 109Staple mode feed and deliveryIn this mode, two to fifteen pages of media are stapled into one set and the

Q2431-90912 List of figures xiFigure 118. Laser/scanner (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

110 Theory of operation Q2431-90912The jogger guide motor (M1101) moves the jogger guides to the waiting position, and the stapler/stacker driver PCA

Q2431-90912 Chapter 5 Theory of operation 111At a specific time after the paper inlet sensor (PS1101) detects the trailing edge of the media, the stap

112 Theory of operation Q2431-90912After the pages are stapled, the stapler/stacker driver PCA activates the feed motor (M1103; counterclockwise) to a

Q2431-90912 Chapter 5 Theory of operation 113Stapler unitThe major components of the stapler unit are the stapler motor (M104), the staple cartridge,

114 Theory of operation Q2431-90912Stapler unit operationThe stapler unit uses the stapler unit motor (M104), staple cam, staple press head plates, st

Q2431-90912 Chapter 5 Theory of operation 115As staple cam 1 rotates, it raises the staple press head plate 1. This forms the flat staple into a “u” s

116 Theory of operation Q2431-90912Staple level detectionThe stapler/stacker driver PCA uses the staple-detection switch to detect the presence and nu

Q2431-90912 Chapter 5 Theory of operation 117Stapler/stacker jam detectionThe following sensors detect the presence of media in the stapler/stacker an

118 Theory of operation Q2431-90912Image-formation systemThe image-formation system is the main system in the printer. It consists of five stages:● El

Q2431-90912 Chapter 5 Theory of operation 119Figure 50. Image formation block diagram

xii List of figures Q2431-90912Figure 182. 1,500-sheet feeder roller (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

120 Theory of operation Q2431-90912Electrostatic latent-image formationForming the electrostatic latent image on the photosensitive drum requires appl

Q2431-90912 Chapter 5 Theory of operation 121Writing the imageThe laser/scanner contains two diodes in the laser unit. During the writing process, the

122 Theory of operation Q2431-90912Developing the imageThe developing process makes the latent electrostatic image a visible image on the drum. The de

Q2431-90912 Chapter 5 Theory of operation 123Transferring the imageDuring the transferring process the toner image on the drum surface is transferred

124 Theory of operation Q2431-90912Fusing the imageThe image is only held in place by electrostatic attraction when it is transferred from the drum to

Q2431-90912 Chapter 5 Theory of operation 125Cleaning the transfer charging roller and photosensitive drumResidual (left over) toner is cleaned off of

126 Theory of operation Q2431-90912Print cartridge memory chipThe print cartridge memory chip is a non-volatile memory device built into the print car

Q2431-90912 Chapter 5 Theory of operation 127Formatter systemThe formatter is responsible for the following procedures:● Controlling the PowerSave mod

128 Theory of operation Q2431-90912EconoModeThe EconoMode setting uses up to 50 percent less toner than standard mode printing by reducing the dot den

Q2431-90912 Chapter 5 Theory of operation 129Printer memoryIf the printer encounters difficulty managing available memory, a clearable warning message

Q2431-90912 List of figures xiiiFigure 246. Tray 2 lifter driver assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

130 Theory of operation Q2431-90912PJL overview Printer job language (PJL) is an integral part of configuration, in addition to the standard printer c

Q2431-90912 Chapter 6 Removing and replacing parts 1316 Removing and replacing partsContentsRemoval and replacement strategy . . . . . . . . . . . .

132 Removing and replacing parts Q2431-90912Tray 1 paper-pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192Paper feed asse

Q2431-90912 Chapter 6 Removing and replacing parts 133Removal and replacement strategyThis chapter describes how to remove, replace, and reassemble th

134 Removing and replacing parts Q2431-90912Screws used in the printerThis table describes the screws used in the printer and provides guidelines to h

Q2431-90912 Chapter 6 Removing and replacing parts 135Parts-removal treeUse the following diagram to determine the order in which parts must be remove

136 Removing and replacing parts Q2431-90912Printer input tray, and cabinet wheel locksWhen the printer and input trays are placed on the cabinet stan

Q2431-90912 Chapter 6 Removing and replacing parts 137User-replaceable partsPrint cartridge1. Open the control-panel door.Figure 59. Print cartridge (

138 Removing and replacing parts Q2431-90912Transfer roller1. Open the control-panel door and tray 1.CAUTION Do not touch the black rubber on the roll

Q2431-90912 Chapter 6 Removing and replacing parts 139Tray 1 pickup rollerNote If the optional envelope feeder accessory is installed, press the relea

xiv List of figures Q2431-90912

140 Removing and replacing parts Q2431-90912Tray 1 separation padNote If the optional envelope feeder accessory is installed, press the release button

Q2431-90912 Chapter 6 Removing and replacing parts 141Tray 2 feed rollers1. Remove tray 2 and place it on a level work surface. Locate and open the co

142 Removing and replacing parts Q2431-90912WARNING! Do not allow the front of the printer to extend beyond the edge of the work surface. The printer

Q2431-90912 Chapter 6 Removing and replacing parts 143Covers, tray 1, and the rear output binAccessory covers and the tray 2 extension doorNote Access

144 Removing and replacing parts Q2431-909123. Grasp the rear accessory cover (the mounting position for the optional duplexer) and pull it straight o

Q2431-90912 Chapter 6 Removing and replacing parts 145Formatter cover1. Grasp the formatter cover.2. Pull the cover straight back and away from the pr

146 Removing and replacing parts Q2431-90912Top coverNote If the optional stapler/stacker or stacker accessory is installed, lift it straight up and o

Q2431-90912 Chapter 6 Removing and replacing parts 1474. Use needle-nose pliers to release the print-cartridge drive-arm (callout 3).Hint Push the dri

148 Removing and replacing parts Q2431-909126. Disconnect the control-panel wire-harness (callout 5) from the DC controller PCA. Remove the top cover.

Q2431-90912 Chapter 6 Removing and replacing parts 149Right-side cover1. Remove the following assemblies:● Formatter cover. See “Formatter cover” on p

Q2431-90912 List of tables xvList of tablesTable 1. Product configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

150 Removing and replacing parts Q2431-909124. Locate the arrow (callout 2) that is embossed on the pickup gear cover near the optional envelope feede

Q2431-90912 Chapter 6 Removing and replacing parts 151Left-side cover1. Remove the top cover. See “Top cover” on page 146.2. Release the upper (callou

152 Removing and replacing parts Q2431-90912Tray 11. Open tray 1. Use your fingers to gently pry the paper-guide slide-pin hinges out of the hinge slo

Q2431-90912 Chapter 6 Removing and replacing parts 1533. Firmly pull both sides of the tray 1 sensor arm cover down to release it from the shaft.Figur

154 Removing and replacing parts Q2431-909125. Rotate the paper guide down and away from the printer to release the left paper-guide hinge.Figure 89.

Q2431-90912 Chapter 6 Removing and replacing parts 155Rear output binNote If the optional duplexer accessory is installed, lift it up slightly and pul

156 Removing and replacing parts Q2431-90912Control-panel displayControl-panel overlay1. Use a small flat-blade screwdriver to carefully pry the top o

Q2431-90912 Chapter 6 Removing and replacing parts 157Control-panel assemblyCAUTION Always remove the top cover before attempting to remove the contro

158 Removing and replacing parts Q2431-909124. Raise the top cover so that the print cartridge door begins to open. This allows the door-open flag (ca

Q2431-90912 Chapter 6 Removing and replacing parts 159CAUTION The product contains components that are sensitive to electrostatic discharge (ESD). Alw

xvi List of tables Q2431-90912Table 54. Print quality image defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311T

160 Removing and replacing parts Q2431-90912Internal componentsFirmware DIMMCAUTION The product contains components that are sensitive to electrostati

Q2431-90912 Chapter 6 Removing and replacing parts 161Formatter assemblyHint If possible, print a menu map and a configuration page. See“Menu map” on

162 Removing and replacing parts Q2431-90912FuserWARNING! The fuser is very hot. After turning the printer power off, allow the fuser to cool for at l

Q2431-90912 Chapter 6 Removing and replacing parts 163Output delivery assembly1. Remove the following assemblies:● Top cover. See “Top cover” on page

164 Removing and replacing parts Q2431-90912CAUTION The rear face-down output-bin-sensor (callout 1) wire is routed through a notch (callout 2) on the

Q2431-90912 Chapter 6 Removing and replacing parts 165Duplexing pendulum assemblyNote The duplexing pendulum assembly is part of the paper-path switch

166 Removing and replacing parts Q2431-90912CAUTION The gears in this assembly are not captive when the assembly is removed. They can easily slide off

Q2431-90912 Chapter 6 Removing and replacing parts 167Tray 2 media-size sensor1. Remove the following assemblies:● Top and right-side covers. See“To p

168 Removing and replacing parts Q2431-90912Main cooling fan (left side)1. Remove the following assemblies:● Top cover. See “Top cover” on page 146.●

Q2431-90912 Chapter 6 Removing and replacing parts 1694. Remove one screw (callout 5). Slide the thermistor sensor bar (callout 6) to the right to rel

Q2431-90912 List of tables xviiTable 115. Stacker and stapler/stacker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

170 Removing and replacing parts Q2431-90912Cooling fan (right side; HP LaserJet 4300 series printer only)Note This fan is not installed in the HP Las

Q2431-90912 Chapter 6 Removing and replacing parts 1714. Unplug the fan connector from the DC controller PCA (location J78; callout 3) and unweave it

172 Removing and replacing parts Q2431-909126. If it is necessary to remove the fan duct (for example, if the main drive assembly is going to be remov

Q2431-90912 Chapter 6 Removing and replacing parts 173Laser/scanner assembly1. Remove the following assemblies:● Top cover. See “Top cover” on page 14

174 Removing and replacing parts Q2431-909124. Remove four screws (callout 4). Do not turn the laser/scanner adjustment screw (circled).Figure 119. La

Q2431-90912 Chapter 6 Removing and replacing parts 175Print-cartridge motor (HP LaserJet 4300 series printer only)Note This motor is not installed on

176 Removing and replacing parts Q2431-909123. Slip the toroid (callout 3) off of its retainer clip. Support the motor and remove three screws (callou

Q2431-90912 Chapter 6 Removing and replacing parts 177Main motor1. Remove the following assemblies:● Top cover. See “Top cover” on page 146.● Right-si

178 Removing and replacing parts Q2431-909124. Remove three screws (callout 4). Remove the main motor.Figure 125. Main motor (3 of 3)34

Q2431-90912 Chapter 6 Removing and replacing parts 179Tray 2 lifter-drive assembly1. Remove the following assemblies:● Top cover. See “Top cover” on p

xviii List of tables Q2431-90912

180 Removing and replacing parts Q2431-909123. Unhook the tension spring (callout 3). Remove one screw (callout 4). Remove the lifter-drive assembly.H

Q2431-90912 Chapter 6 Removing and replacing parts 181DC controller PCA1. Remove the following assemblies:● Top and right-side covers. See “Top cover

182 Removing and replacing parts Q2431-909123. Remove the two screws (callout 4) that fasten the formatter connector bracket to the chassis. Unweave t

Q2431-90912 Chapter 6 Removing and replacing parts 183Paper-pickup assembly, 1. Remove the following assemblies:● Top cover. See “Top cover” on page 1

184 Removing and replacing parts Q2431-909124. Unplug the paper-pickup gear assembly solenoid (callout 4) connector from the DC controller PCA (locati

Q2431-90912 Chapter 6 Removing and replacing parts 1856. Remove the paper-pickup gear assembly.Figure 135. Paper-pickup assembly (5 of 5)Reinstall not

186 Removing and replacing parts Q2431-90912Main drive assembly1. Remove the following assemblies:● Top and right-side covers. See “Top c over” on pag

Q2431-90912 Chapter 6 Removing and replacing parts 1873. Remove five screws (callout 3). Remove the main drive assembly.Figure 138. Main drive assembl

188 Removing and replacing parts Q2431-90912Power supply1. Remove the following assemblies:● Rear output bin. See “Rear output bin” on page 155.● Rear

Q2431-90912 Chapter 6 Removing and replacing parts 1893. Remove two screws (callout 4). Depress the tray 2 right-side guide lock (callout 5) and slide

Q2431-90912 Chapter 1 Printer description 11 Printer descriptionContentsPrinter configurations . . . . . . . . . . . . . . . . . . . . . . . . . . .

190 Removing and replacing parts Q2431-909125. Feed the two ribbon cables and the wire-harness through the hole in the right side of the chassis (call

Q2431-90912 Chapter 6 Removing and replacing parts 191Paper-feed belt assembly1. Remove the power supply. See “Power supply” on page 188.2. Remove thr

192 Removing and replacing parts Q2431-90912Tray 1 paper-pickup assembly1. Remove the following assemblies:● Top, right-side, and left-side covers. Se

Q2431-90912 Chapter 6 Removing and replacing parts 1933. Remove three screws (callout 3). Depress the pickup-gear-cover upper retainer tab (callout 4)

194 Removing and replacing parts Q2431-90912CAUTION Carefully thread the solenoid wire-harness through the hole provided in the chassis. When you remo

Q2431-90912 Chapter 6 Removing and replacing parts 195Paper feed assembly1. Remove the following assemblies:● Tray 1. See “Tray 1 ” on page 152.● Tray

196 Removing and replacing parts Q2431-909123. Feed the paper-feed assembly wire-harness through the hole in the chassis (callout 2). Remove three scr

Q2431-90912 Chapter 6 Removing and replacing parts 197Reinstall note When the paper feed assembly is installed, the sensor-flag spring must be correct

198 Removing and replacing parts Q2431-90912Registration assembly1. Remove the main drive assembly. See “Main drive assembly” on page 186.2. Remove on

Q2431-90912 Chapter 6 Removing and replacing parts 199CAUTION Do not remove the screw (callout 4) that holds the registration-roller plate return spri

2 Printer description Q2431-90912Environmental product stewardship program . . . . . . . . . . . . . . . . . . . 24Protecting the environment . . . .

200 Removing and replacing parts Q2431-90912Transfer assembly1. Remove the following assemblies:● Output delivery assembly. See “Output delivery assem

Q2431-90912 Chapter 6 Removing and replacing parts 2013. Remove the tray 2 left-side guide mounting screw (callout 3). Depress the tray 2 left-side gu

202 Removing and replacing parts Q2431-909124. Push the paper-feed and transfer assembly wire-harnesses through the hole in the chassis (callout 5).Re

Q2431-90912 Chapter 6 Removing and replacing parts 2036. Support the transfer assembly and carefully separate the left side of the chassis from the la

204 Removing and replacing parts Q2431-90912Accessories500-sheet feeder assembly500-sheet feed rollersNote The removal procedure for the two paper-fee

Q2431-90912 Chapter 6 Removing and replacing parts 2052. Use a flat-blade screwdriver to release the right-side cover front locking tab. Figure 164. 5

206 Removing and replacing parts Q2431-909124. Use flat-blade screwdriver to release the rear locking tab.Figure 166. 500-sheet feeder right-side cove

Q2431-90912 Chapter 6 Removing and replacing parts 207500-sheet feeder control PCACAUTION The product contains components that are sensitive to electr

208 Removing and replacing parts Q2431-90912500-sheet feeder media-size sensor1. Remove the 500-sheet feeder PCA. See “500-sheet feeder control PCA” o

Q2431-90912 Chapter 6 Removing and replacing parts 209500-sheet feeder lifter-drive assembly1. Remove the 500-sheet feeder right-side cover. See “500-

Q2431-90912 Chapter 1 Printer description 3Printer configurationsThe HP LaserJet 4200/4300 series printer is available in a total of 12 models.Table 1

210 Removing and replacing parts Q2431-90912500-sheet feeder paper-pickup drive assembly1. Remove the following assemblies:● 500-sheet feeder right-si

Q2431-90912 Chapter 6 Removing and replacing parts 2114. Unplug the accessory-connector wire-harness from the PCA (callout 4). Figure 175. 500-sheet f

212 Removing and replacing parts Q2431-909126. Remove one e-clip and the shaft collar (callout 9).Figure 177. 500-sheet feeder paper-pickup drive asse

Q2431-90912 Chapter 6 Removing and replacing parts 213CAUTION Some gears are not captive when the paper-pickup assembly is removed. They can easily sl

214 Removing and replacing parts Q2431-909121,500-sheet feeder assembly1,500-sheet feeder feed rollersNote The removal procedure for the two paper-fee

Q2431-90912 Chapter 6 Removing and replacing parts 2151,500-sheet feeder door1. Remove one screw (callout 1) and remove the door-stop plate (callout 2

216 Removing and replacing parts Q2431-909123. Lift the door straight up and off of the door hinge pins.Figure 185. 1,500-sheet feeder door (3 of 3)Hi

Q2431-90912 Chapter 6 Removing and replacing parts 2171,500-sheet feeder rear cover1. Locate the upper rear-cover locking tabs (callout 1) on each sid

218 Removing and replacing parts Q2431-909121,500-sheet feeder right-side cover1. Remove the following assemblies:● Door. See “1,500-sheet feeder door

Q2431-90912 Chapter 6 Removing and replacing parts 2194. Rotate the top of the cover away from the chassis and then lift it up and remove it.Figure 19

4 Printer description Q2431-90912Model and serial numbersThe model number and printer serial number are listed on an identification label located unde

220 Removing and replacing parts Q2431-909121,500-sheet feeder control PCA1. Remove the following assemblies● Door. See “1,500-sheet feeder door” on p

Q2431-90912 Chapter 6 Removing and replacing parts 2211,500-sheet feeder media-size sensor1. Remove the following assemblies:● Door. See “1,500-sheet

222 Removing and replacing parts Q2431-909121,500-sheet feeder lifter-drive assembly1. Remove the following assemblies:● Door. See “1,500-sheet feeder

Q2431-90912 Chapter 6 Removing and replacing parts 2234. Remove seven screws (callout 4) and then remove the bracket (callout 5). 5. Slide the spring-

224 Removing and replacing parts Q2431-909127. Slide the lifter-drive assembly away from the chassis until the lifter-drive gear-shaft clears the corr

Q2431-90912 Chapter 6 Removing and replacing parts 2251,500-sheet feeder paper-pickup drive assembly1. Remove the following assemblies:● Door. See “1,

226 Removing and replacing parts Q2431-90912

Q2431-90912 Chapter 7 Troubleshooting 2277TroubleshootingContents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

228 Troubleshooting Q2431-90912Display-message troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257Status messages . . . . .

Q2431-90912 Chapter 7 Troubleshooting 229Accessory component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339500-sheet feed

Q2431-90912 Chapter 1 Printer description 5Site requirementsThe following environmental specifications must be maintained to ensure the correct operat

230 Troubleshooting Q2431-90912Introduction In order to use the information in this chapter, you should have a basic understanding of the LaserJet pri

Q2431-90912 Chapter 7 Troubleshooting 231Troubleshooting processWhen the printer malfunctions or encounters an unexpected situation, information on th

232 Troubleshooting Q2431-90912Initial troubleshooting checklistThe following checklist contains basic questions that you can ask the customer to help

Q2431-90912 Chapter 7 Troubleshooting 233Miscellaneous● Are any non-HP components installed? Check for any non-HP components (print cartridges, memory

234 Troubleshooting Q2431-90912Troubleshooting flowchart The flowchart on these two pages highlights the general processes you can use to isolate and

Q2431-90912 Chapter 7 Troubleshooting 235Troubleshooting flowchart (continued)Figure 200. Troubleshooting flowchart (2 of 2)Information pagesCan you p

236 Troubleshooting Q2431-90912Power-on checksThe basic printer functions should start up as soon as the printer is plugged into an electrical wall re

Q2431-90912 Chapter 7 Troubleshooting 237Table 38. Power-on defect or blank displayProblem ActionThe power cord is not plugged into the wall receptacl

238 Troubleshooting Q2431-90912The fan works, but the control-panel display is blank.1. Print an engine test. “Engine test page” on page 2542. If the

Q2431-90912 Chapter 7 Troubleshooting 239Troubleshooting toolsPress the SELECT ( ) button to open the menus. Use the UP ARROW ( ) button or the DOWN A

6 Printer description Q2431-90912Physical dimensionsFigure 1. Printer physical dimensions547 mm (21.5 inches)1,045 mm (41.1 inches)412 mm(16.2 inches)

240 Troubleshooting Q2431-90912Menu mapUse the menu map to help navigate the printer submenus and select configuration settings. Printing a menu map i

Q2431-90912 Chapter 7 Troubleshooting 241Configuration pageUse the configuration page to view current printer settings, to help troubleshoot printer p

242 Troubleshooting Q2431-90912Supplies status pageUse the supplies status page to obtain information about the print cartridge installed in the print

Q2431-90912 Chapter 7 Troubleshooting 243Embedded Web server When the printer is directly connected to a computer, the embedded Web server is supporte

244 Troubleshooting Q2431-90912Information tabThe Information tab contains the following pages.● Device Status. Shows the printer status and the life

Q2431-90912 Chapter 7 Troubleshooting 245Other linksThis section of the embedded Web server contains links that connect you to the Internet. You must

246 Troubleshooting Q2431-90912To select status messages1. Open Printer Status and Alerts in one of these ways:• Double-click the Printer Status and A

Q2431-90912 Chapter 7 Troubleshooting 247Control-panel menusUse the control-panel menus to control various printer functions. For example, you can use

248 Troubleshooting Q2431-90912Diagnostics menuAdministrators can use this menu to isolate parts and to troubleshoot jam and print-quality issues.The

Q2431-90912 Chapter 7 Troubleshooting 249Service menu (service PIN codes)Authorized HP service technicians can use this menu to gain access to printer

Q2431-90912 Chapter 1 Printer description 7Printer weights (without print cartridge)Environmental specificationsCAUTION Power requirements are based o

250 Troubleshooting Q2431-90912Service ID This information appears on the configuration page (see “Configuration page” on page 241), which eliminates

Q2431-90912 Chapter 7 Troubleshooting 251Printer resets and power-on modesCold reset A cold reset unlocks menus that have been previously locked and s

252 Troubleshooting Q2431-90912Hard-disk initialization CAUTION A hard-disk initialization erases and reformats the printer hard disk. Perform a hard

Q2431-90912 Chapter 7 Troubleshooting 253Self test1. Turn the printer power off.2. Hold down the SELECT ( ) button, and then turn the printer power on

254 Troubleshooting Q2431-90912Test pages Printing test pages helps you determine whether or not the printer engine and the formatter are functioning.

Q2431-90912 Chapter 7 Troubleshooting 255Interface troubleshooting Communications checksNote Communication problems are normally the customer’s respon

256 Troubleshooting Q2431-90912Jetdirect pageFigure 205. Jetdirect pageA. HP Jetdirect ConfigurationIf the EIO Jetdirect card properly installed and t

Q2431-90912 Chapter 7 Troubleshooting 257Display-message troubleshooting The following tables explain the messages that might appear on the control-pa

258 Troubleshooting Q2431-90912Alphabetical printer messages Note Not all messages are described in the tables; the messages that are not listed are s

Q2431-90912 Chapter 7 Troubleshooting 259CLOSE TOP COVERFor help pressThe top cover is open or the top cover switch (SW101) is defective.1. Press the

8 Printer description Q2431-90912Values are subject to change. See http://www.hp.com/support/lj4200 or http://www.hp.com/support/lj4300 for current in

260 Troubleshooting Q2431-90912EIO DISK XNOT FUNCTIONALFor help pressThe EIO disk in slot X is not working correctly.1. Remove the EIO disk from the i

Q2431-90912 Chapter 7 Troubleshooting 261INSERT OR CLOSETRAY XXFor help pressTray XX must be inserted or closed before the current job can be printed.

262 Troubleshooting Q2431-90912INSTALL FUSERFor help pressThe fuser is either not installed or not correctly installed in the printer. 1. The fuser is

Q2431-90912 Chapter 7 Troubleshooting 263LOAD TRAY XX:<TYPE> <SIZE>For help pressTray XX is either empty (based on the operation of the pa

264 Troubleshooting Q2431-90912NON HP CARTRIDGEDETECTEDThe printer has detected that an HP print cartridge is currently installed.If a new HP cartridg

Q2431-90912 Chapter 7 Troubleshooting 265OUTPUT BIN 1 FULLREMOVE ALL PAPER FROM BINNote:The stacker or stapler/stacker LED blinks in amber.The stacker

266 Troubleshooting Q2431-90912RAM DISK DEVICE FAILUREalternates withREADYFor menus pressThe RAM disk had a critical failure and can no longer be used

Q2431-90912 Chapter 7 Troubleshooting 267REPLACE CARTRIDGEalternates withFor help pressNo toner remains in the print cartridge. Printing can continue

268 Troubleshooting Q2431-90912SIZE MISMATCHTRAY XX=<SIZE>For help pressalternates withREADYFor menus pressThe tray is loaded with media that is

Q2431-90912 Chapter 7 Troubleshooting 269STAPLER LOW ON STAPLESFor help pressNote:The stapler/stacker LED is continuously illuminated green (this erro

Q2431-90912 Chapter 1 Printer description 9Paper specificationsHP LaserJet 4200/4300 printers produce excellent print quality. This printer accepts a

270 Troubleshooting Q2431-90912TRAY XX CONTAINSUNKNOWN MEDIAThe media type or size in the specified tray cannot be determined.1. To change the media t

Q2431-90912 Chapter 7 Troubleshooting 271TRAY XX SIZE=<XXXX SIZE>For help press A tray was installed with the standard/custom switch set to “cus

272 Troubleshooting Q2431-90912TRAY XX<TYPE> <SIZE>TO CHANGE TYPE PRESSalternates with TRAY XX<TYPE> <SIZE>SIZE DETECTED BY TR

Q2431-90912 Chapter 7 Troubleshooting 273TRAY XX<TYPE> <SIZE>SIZE SPECIFIED BY USERalternates with TRAY XX<TYPE> <SIZE>TO CHAN

274 Troubleshooting Q2431-90912Numerical printer messages Table 42. Numerical printer messagesMessage Description Action10.00.00SUPPLIES MEMORY ERRORo

Q2431-90912 Chapter 7 Troubleshooting 27513.XX.YY JAM For help pressA jam exists in the media path. 1. Press the HELP ( ) button for detailed informat

276 Troubleshooting Q2431-9091213.01.00. or 13.03.00JAM IN TRAY XFor help pressor13.03.00 PAPER JAM OPEN INPUT TRAYS THEN OPEN AND CLOSE TOP COVERA pa

Q2431-90912 Chapter 7 Troubleshooting 277CONTINUED13.01.00. or 13.03.00JAM IN TRAY XFor help pressor13.03.00 PAPER JAM OPEN INPUT TRAYS THEN OPEN AND

278 Troubleshooting Q2431-9091213.06.00 and 13.12.00 JAM INSIDE REAR DOORFor help pressA page is jammed near the rear output door.1. Press the HELP (

Q2431-90912 Chapter 7 Troubleshooting 27913.12.07 JAM IN STAPLERNote:The stapler/stacker LED blinks in amber (this error applies to the stapler/stacke

hp LaserJet 4200/4300 Series PrintersService

10 Printer description Q2431-90912Supported sizes and weights of mediaNote The printer always prints at half speed from tray 1. The printer also print

280 Troubleshooting Q2431-9091213.12.10 JAM IN OUTPUT DEVICEFor help pressThe event log records this error message as 13.12.0ANote:The stacker or stap

Q2431-90912 Chapter 7 Troubleshooting 28113.98.00 OPEN INPUT TRAYS THEN OPEN AND CLOSE TOP COVER● The face-up tray was opened when the printer was att

282 Troubleshooting Q2431-9091240 EIO X BAD TRANSMISSIONTo continue pressA connection with the card in EIO slot X has been broken abnormally. 1. Press

Q2431-90912 Chapter 7 Troubleshooting 28349.XXXXPRINTER ERRORTo continue turn off then onA critical firmware error has occurred that caused the proces

284 Troubleshooting Q2431-90912Continued49.XXXXPRINTER ERRORContinued Continued11. Replace the DIMM or EIO device caused the error message.12. Remembe

Q2431-90912 Chapter 7 Troubleshooting 28551.XYPRINTER ERRORFor help pressalternates with51.XYPRINTER ERRORTo continue turn off then onA printer error

286 Troubleshooting Q2431-9091255.XPRINTER ERRORFor help pressalternates with55.XPRINTER ERRORTo continue pressThe DC controller is not communicating

Q2431-90912 Chapter 7 Troubleshooting 28757.XPRINTER ERRORTo continue turn off then onor57.3 EP FAN FAILUREor57.4 MAIN FAN FAILUREA printer fan is not

288 Troubleshooting Q2431-9091258.XPRINTER ERRORFor help pressalternates with58.XPRINTER ERRORTo continue turn off then onA memory error has been dete

Q2431-90912 Chapter 7 Troubleshooting 28959.XYPRINTER ERRORFor help press alternates with59.XYPRINTER ERRORTo continue turn off then onA printer-motor

Q2431-90912 Chapter 1 Printer description 11Labels Minimum:76 by 127 mm (3 by 5 inches)Maximum:216 by 356 mm(8.5 by 14 inches)Thickness:0.127 to 0.22

290 Troubleshooting Q2431-9091259.4 EP MOTOR ROTATION ERROR(LJ 4300 only)The print-cartridge drive motor (LJ 4300 only) is not functioning properly.1.

Q2431-90912 Chapter 7 Troubleshooting 29160.4 TRAY 4 LIFTER MOTOR FAILUREThe tray 4 lifter-motor is not functioning.Tray 4 can be a 500-sheet feeder o

292 Troubleshooting Q2431-9091266.12.XX OUTPUT DEVICE FAILUREFor help pressNote:The stacker or stapler/stacker LED is continuously illuminated in ambe

Q2431-90912 Chapter 7 Troubleshooting 29368.X PERMANENT STORAGE FULLFor help pressalternates with68.X PERMANENT STORAGE FULLTo continue pressA nonvola

294 Troubleshooting Q2431-9091279.XXXX PRINTER ERRORTo continue turn off then onA critical hardware error has occurred.1. Turn the printer off and the

Q2431-90912 Chapter 7 Troubleshooting 295Paper-path troubleshootingOverviewIf a jam message appears on the printer control-panel display, look for jam

296 Troubleshooting Q2431-90912Paper-jam recovery This printer can automatically provide paper-jam recovery. You can use the jam-recovery to automatic

Q2431-90912 Chapter 7 Troubleshooting 297Avoiding paper jams Use this table to help avoid specific types of paper jamsTable 43. Common causes of paper

298 Troubleshooting Q2431-90912Persistent jams If jams occur repeatedly, use the information in this section to diagnose the root cause of the problem

Q2431-90912 Chapter 7 Troubleshooting 299General paper-path troubleshootingUse the following information to isolate the cause of the problem. When you

12 Printer description Q2431-90912Table 10. Duplex accessory media specificationsSize Dimensions WeightLetter 216 by 279 mm(8.5 by 11 inches)60 to 120

300 Troubleshooting Q2431-90912Paper-path testThis test generates one or more test pages that can be used to isolate the cause of jams.To isolate a ja

Q2431-90912 Chapter 7 Troubleshooting 301Jams in tray 1 Jams in tray 2 Table 44. Causes of tray 1 jams Cause SolutionThe pickup roller is dirty, worn,

302 Troubleshooting Q2431-90912Jams in tray 3 and/or tray 4Table 46. Causes of tray 3 and or tray 4 jamsCause SolutionThe feed or separation rollers a

Q2431-90912 Chapter 7 Troubleshooting 303Jams in the paper path Note Avoid using odd-sized media. Odd-sized media might not transport properly between

304 Troubleshooting Q2431-90912Media transport problems If media is feeding incorrectly, use the information in this section to identify and resolve t

Q2431-90912 Chapter 7 Troubleshooting 305Paper is skewed Table 52. Causes for skewed paperCause SolutionPaper dust or dirt has accumulated on the tray

306 Troubleshooting Q2431-90912Image-formation troubleshooting The image formation system is the central hub of the printer. During image formation, a

Q2431-90912 Chapter 7 Troubleshooting 307Overhead transparency defects Overhead transparencies may display any of the image quality problems that any

308 Troubleshooting Q2431-90912Image defects OverviewThis section helps you define print-quality problems and what to do to correct them. Often print-

Q2431-90912 Chapter 7 Troubleshooting 309Check the print cartridgeImage-formation defects are often the result of problems with the print cartridge. I

Q2431-90912 Chapter 1 Printer description 13Note The stacker and stapler/stacker do not support card stock.Do not use the stapler/stacker to staple la

310 Troubleshooting Q2431-90912Half self-test functional checkThe electrophotographic process can be subdivided into the following stages:● Cleaning (

Q2431-90912 Chapter 7 Troubleshooting 311Image defect tablesTable 54. Print quality image defectsSee “Light print (partial page)” on page 313See “Ligh

312 Troubleshooting Q2431-90912See “Black page” on page 322.See “Blank (or white) page” on page 323.See “Dark print” on page 324.Table 54. Print quali

Q2431-90912 Chapter 7 Troubleshooting 313Table 55. Light print (partial page)Possible cause Recommended action(s)The print cartridge is not installed

314 Troubleshooting Q2431-90912Table 57. Specks or dotsPossible cause Recommended actionSpecksSpecks might appear on a page after a jam has been clear

Q2431-90912 Chapter 7 Troubleshooting 315Table 58. Drop outs and character voidsPossible cause Recommended action(s)Printing on the wrong side of the

316 Troubleshooting Q2431-90912Table 59. LinesPossible cause Recommended action(s)Vertical lines (in the paper path direction)The print cartridge is n

Q2431-90912 Chapter 7 Troubleshooting 317Table 60. Grey backgroundPossible cause Recommended action(s)The media does not meet specifications or is not

318 Troubleshooting Q2431-90912Table 62. Repeating defects and repeating imagesPossible cause Recommended action(s)The print cartridge or fuser is dam

Q2431-90912 Chapter 7 Troubleshooting 319Table 64. SkewPossible cause Recommended action(s)The media does not meet specifications or is not stored pro

14 Printer description Q2431-90912Supported types of mediaThe printer supports the following types of paper and other print media:Guidelines for using

320 Troubleshooting Q2431-90912Table 67. White lines Possible cause Recommended action(s)White lines in the paper pathToner supply is low or the print

Q2431-90912 Chapter 7 Troubleshooting 321Table 69. White spots on blackPossible cause Recommended action(s)The media does not meet specifications or i

322 Troubleshooting Q2431-90912Table 72. Black pagePossible cause Recommended action(s)The print cartridge is defective. ● Replace the print cartridge

Q2431-90912 Chapter 7 Troubleshooting 323Table 73. Blank (or white) pagePossible cause Recommended action(s)Software configuration (intermittent probl

324 Troubleshooting Q2431-90912Table 74. Dark printPossible cause Recommended action(s)Wrong toner density setting. ● Access the print-quality menu at

Q2431-90912 Chapter 7 Troubleshooting 325Repetitive defects troubleshooting Defects on printer rollers can cause image defects to appear at regular in

326 Troubleshooting Q2431-90912Troubleshooting the stacker and the stapler/stackerOverviewWhen troubleshooting the stacker or stapler/stacker it might

Q2431-90912 Chapter 7 Troubleshooting 327Jam errorsStacker and stapler/stacker paper pathFigure 208. Stacker and stapler/stacker paper pathStacker pap

328 Troubleshooting Q2431-90912Stapler/stacker paper path test1. Press the SELECT ( ) button to open the menus.2. Use the UP ARROW ( ) button or the D

Q2431-90912 Chapter 7 Troubleshooting 329Printer connection area jam without the leading edge of the media sticking out of the top of the printer.The

Q2431-90912 Chapter 1 Printer description 15Paper weight equivalence tableUse the following table to determine approximate equivalent points in weight

330 Troubleshooting Q2431-90912Paper transport errorsMalfunction errorsTable 78. Paper transport error troubleshootingPossible cause Recommended actio

Q2431-90912 Chapter 7 Troubleshooting 331Component errorsNote Component errors will cause a control panel message to appear on the control-panel displ

332 Troubleshooting Q2431-90912Printer component locationsMain printer partsFigure 209. Location of main printer parts (1 of 4)1. Laser/scanner assemb

Q2431-90912 Chapter 7 Troubleshooting 333Figure 210. Location of main printer parts (2 of 4)1. Output delivery assembly2. Registration roller assembly

334 Troubleshooting Q2431-90912Figure 211. Location of main printer parts (3 of 4)1. Transfer roller2. Tray 1 pickup roller3. Separation pad123

Q2431-90912 Chapter 7 Troubleshooting 335Figure 212. Location of main printer parts (4 of 4)1. Pickup roller2. Feed roller3. Separation roller (in the

336 Troubleshooting Q2431-90912Printer switches and sensorsFigure 213. Location of printer switches and sensors1. Output bin full sensor (PS104)2. Pap

Q2431-90912 Chapter 7 Troubleshooting 337Printer motors and fansFigure 214. Location of printer motors and fans1. Right-side cooling fan (HP LaserJet

338 Troubleshooting Q2431-90912Printer PCAsFigure 215. Location of printer PCAs1. DC controller PCA2. Power supply (high-voltage and low-voltage circu

Q2431-90912 Chapter 7 Troubleshooting 339Accessory component locations500-sheet feeder main partsFigure 216. Location of 500-sheet paper feeder main p

16 Printer description Q2431-90912LabelsUse tray 1 to print labels. Labels are multiple-layer media that typically consists of a face sheet (the print

340 Troubleshooting Q2431-90912500-sheet feeder switches, sensors, solenoids, and PCAsFigure 217. Location of 500-sheet paper feeder switches, sensors

Q2431-90912 Chapter 7 Troubleshooting 3411,500-sheet feeder main partsFigure 218. Location of 1,500-sheet paper feeder main parts (1 of 2)1. 1,500-she

342 Troubleshooting Q2431-90912Figure 219. Location of 1,500-sheet paper feeder main parts (2 of 2)1. 1,500-sheet feeder feed roller2. 1,500-sheet fee

Q2431-90912 Chapter 7 Troubleshooting 3431,500-sheet feeder switches, sensors, solenoids, and PCAsFigure 220. Location of 1,500-sheet switches, sensor

344 Troubleshooting Q2431-90912Stapler/stacker stapler assemblyFigure 221. Location of the stapler/stacker stapler unit1. Stapler unit (stapler/stacke

Q2431-90912 Chapter 7 Troubleshooting 345Stacker and stapler/stacker switches and sensorsFigure 222. Location of the stacker and stapler/stacker switc

346 Troubleshooting Q2431-90912Stacker and stapler/stacker motors and solenoidsFigure 223. Location of the stacker and stapler/stacker motors and sole

Q2431-90912 Chapter 7 Troubleshooting 347Stacker and stapler/stacker PCAsFigure 224. Location of the stacker and stapler/stacker PCAs1. Stacker or sta

348 Troubleshooting Q2431-90912Printer and accessory wiring diagramsFigure 225. HP LaserJet 4200 wiring diagram

Q2431-90912 Chapter 7 Troubleshooting 349Figure 226. HP LaserJet 4300 wiring diagram

Q2431-90912 Chapter 1 Printer description 17EnvelopesEnvelope constructionEnvelope construction is critical. Envelope fold lines can vary considerably

350 Troubleshooting Q2431-90912Figure 227. 500-sheet feeder wiring diagram

Q2431-90912 Chapter 7 Troubleshooting 351Figure 228. 1,500-sheet feeder wiring diagram

352 Troubleshooting Q2431-90912Figure 229. Duplex accessory wiring diagram

Q2431-90912 Chapter 7 Troubleshooting 353Figure 230. Envelope feeder accessory wiring diagram

354 Troubleshooting Q2431-90912Figure 231. Stacker accessory wiring diagram

Q2431-90912 Chapter 7 Troubleshooting 355Figure 232. Stapler/stacker accessory wiring diagram

356 Troubleshooting Q2431-90912DC controller block diagramFigure 233. DC controller connectors diagramPaper feed clutch(3-pin; J89)Memory chip sensor(

Q2431-90912 Chapter 7 Troubleshooting 357General timing diagramsFigure 234. HP LaserJet 4200 general timing diagram

358 Troubleshooting Q2431-90912Figure 235. HP LaserJet 4300 general timing diagram

Q2431-90912 Chapter 7 Troubleshooting 359Figure 236. Stapler/stacker timing diagram

18 Printer description Q2431-90912Envelope marginsThe following table gives typical address margins for a Commercial #10 or DL envelope.Hint For the b

360 Troubleshooting Q2431-90912

Q2431-90912 8 Parts and diagrams 3618 Parts and diagramsContentsOrdering parts, supplies, and getting support . . . . . . . . . . . . . . . . . . . .

362 Parts and diagrams Q2431-90912Ordering parts, supplies, and getting supportOrdering informationThis chapter contains field replaceable unit (FRU)

Q2431-90912 8 Parts and diagrams 363HP provides free telephone support during the product warranty period. When you call, you will be connected to a

364 Parts and diagrams Q2431-90912Accessories and suppliesThe following items are available through your local authorized HP Services provider. To fin

Q2431-90912 8 Parts and diagrams 365Table 83. Memory, fonts, and mass storageItem Part number Exchange numberFirmware DIMM (dual inline memory module

366 Parts and diagrams Q2431-90912Table 85. Printer maintenance kit and exchange partsItem Part number Exchange numberPrinter maintenance kit● 110-V p

Q2431-90912 8 Parts and diagrams 367How to use the parts lists and diagramsThe figures in this chapter illustrate the major field replaceable unit (R

368 Parts and diagrams Q2431-90912Parts diagrams and listsFigure 237. External covers and panels12345LJ 4300LJ 42006789101112

Q2431-90912 8 Parts and diagrams 369Table 87. External covers and panelsPart number Description ReferenceRC1-0288-000CN Cover, formatter 1; figure 23

Q2431-90912 Chapter 1 Printer description 19Types of print media to avoidThe following characteristics can affect the performance of the HP LaserJet 4

370 Parts and diagrams Q2431-90912Figure 238. Main assemblies (1 of 3)2LJ 4300163475

Q2431-90912 8 Parts and diagrams 371Table 88. Main assemblies (1 of 3)Part number Description ReferenceRH7-1576-000CN Motor, print cartridge (LJ 4300

372 Parts and diagrams Q2431-90912Figure 239. Main assemblies (2 of 3)21347568

Q2431-90912 8 Parts and diagrams 373Table 89. Main assemblies (2 of 3)Part number Description ReferenceQ2425-69001 (exchange)RM1-0173-000CN (new)Lase

374 Parts and diagrams Q2431-90912Figure 240. Main assemblies (3 of 3)12LJ 43003456781112131415161718910

Q2431-90912 8 Parts and diagrams 375Table 90. Main assemblies (3 of 3)Part number Description ReferenceRG1-4219-000CN Cable, memory 1; figure 240RG1-

376 Parts and diagrams Q2431-90912Figure 241. Right-side assemblies123546Table 91. Right-side assembliesPart number Description ReferenceRG1-4223-000C

Q2431-90912 8 Parts and diagrams 377Figure 242. Power supply and paper feed belt assembly110-127v220-240v12Table 92. Power supply and paper-feed belt

378 Parts and diagrams Q2431-90912Figure 243. Main drive assembly12Table 93. Main drive assemblyPart number Description ReferenceRM1-0001-000CN Main d

Q2431-90912 8 Parts and diagrams 379Figure 244. Paper-pickup assemblyTable 94. Paper-pickup assemblyPart number Description ReferenceRM1-0034-000CN P

ii Q2431-90912Copyright Information© Copyright Hewlett-Packard Company 2002All Rights Reserved. Reproduction, adaptation, or translation without prior

20 Printer description Q2431-90912Safety informationPrint cartridge and toner safetyHandling and storageFor information about handling and storing ton

380 Parts and diagrams Q2431-90912Figure 245. Duplexing pendulum assemblyTable 95. Duplexing pendulum assemblyPart number Description ReferenceRM1-000

Q2431-90912 8 Parts and diagrams 381Figure 246. Tray 2 lifter driver assemblyTable 96. Tray 2 lifter driver assemblyPart number Description Reference

382 Parts and diagrams Q2431-90912Figure 247. Paper pickup assembly17682345910Table 97. Paper pickup assemblyPart number Description ReferenceRG1-4221

Q2431-90912 8 Parts and diagrams 383Figure 248. Paper-feed assembly1234Table 98. Paper-feed assemblyPart number Description ReferenceRM1-0012-000CN P

384 Parts and diagrams Q2431-90912Figure 249. Registration assemblyTable 99. Registration assemblyPart number Description ReferenceRM1-0011-000CN Regi

Q2431-90912 8 Parts and diagrams 385Figure 250. Tray 1 assembly123456Table 100. Tray 1 assemblyPart number Description ReferenceRM1-0004-000CN Tray 1

386 Parts and diagrams Q2431-90912Figure 251. Output delivery assemblyTable 101. Output delivery assemblyPart number Description ReferenceRM1-0026-000

Q2431-90912 8 Parts and diagrams 387Figure 252. Transfer assemblyTable 102. Transfer assemblyPart number Description ReferenceRM1-0007-000CN Transfer

388 Parts and diagrams Q2431-90912Figure 253. Fuser1423

Q2431-90912 8 Parts and diagrams 389Table 103. FuserPart number Description ReferenceQ2425-69004 (exchange)RM1-0013-000CN (new)Fuser, 110-V (LJ 4200)

Q2431-90912 Chapter 1 Printer description 21EMI statement (Korea)VCCI statement (Japan)

390 Parts and diagrams Q2431-90912Figure 254. 500-sheet feeder external covers and panels123Table 104. 500-sheet feeder external covers and panelsPart

Q2431-90912 8 Parts and diagrams 391Figure 255. 500-sheet feeder main assemblies (1 of 2)312Table 105. 500-sheet feeder main assemblies (1 of 2)Part

392 Parts and diagrams Q2431-90912Figure 256. 500-sheet feeder main assemblies (2 of 2)3456127

Q2431-90912 8 Parts and diagrams 393Table 106. 500-sheet feeder main assemblies (2 of 2)Part number Description ReferenceRG1-4250-000CN Cable, sensor

394 Parts and diagrams Q2431-90912Figure 257. 500-sheet feeder paper-pickup drive assemblyTable 107. 500-sheet feeder paper-pickup drive assemblyPart

Q2431-90912 8 Parts and diagrams 395Figure 258. 500-sheet feeder lifter driver assemblyTable 108. 500-sheet feeder lifter driver assemblyPart number

396 Parts and diagrams Q2431-90912Figure 259. 500-sheet tray1423Table 109. 500-sheet trayPart number Description ReferenceRC1-0161-000CN Flag, paper s

Q2431-90912 8 Parts and diagrams 397Figure 260. 1500-sheet feeder external covers and panels351264Table 110. 1500-sheet feeder external covers and pa

398 Parts and diagrams Q2431-90912Figure 261. 1,500-sheet feeder main assemblies15678342

Q2431-90912 8 Parts and diagrams 399Table 111. 1,500-sheet feeder main assembliesPart number Description ReferenceVS1-6175-006CN Connector, interface

22 Printer description Q2431-90912Laser statement (Finland)Luokan 1 laserlaiteKlass 1 Laser ApparatHP LaserJet 4200 series, 4300 series laserkirjoitin

400 Parts and diagrams Q2431-90912Figure 262. 1,500-sheet feeder paper-pickup drive assemblyTable 112. 1,500-sheet feeder paper-pickup drive assemblyP

Q2431-90912 8 Parts and diagrams 401Figure 263. 1,500-sheet feeder lifter-drive assemblyTable 113. 1,500-sheet feeder lifter-drive assemblyPart numbe

402 Parts and diagrams Q2431-90912Figure 264. 1,500-sheet feeder paper-pickup assembly123Table 114. 1,500-sheet feeder paper-pickup assemblyPart numbe

Q2431-90912 8 Parts and diagrams 403Figure 265. Stacker and stapler/stacker12Table 115. Stacker and stapler/stackerPart number Description ReferenceQ

404 Parts and diagrams Q2431-90912Figure 266. Stacker and stapler/stacker1Table 116. Stacker and stapler/stackerPart number Description ReferenceQ2443

Q2431-90912 8 Parts and diagrams 405Alphabetical parts listTable 117. Alphabetical pars listPart number Description ReferenceRC1-0714-000CN Arm, fron

406 Parts and diagrams Q2431-90912RC1-0289-000CN Cover, paper-handling 11; figure 237RM1-0027-000CN Cover, rear output bin 10; figure 237Q2443-67901 C

Q2431-90912 8 Parts and diagrams 407RC1-0342-000CN Holder, plastic thermistor 13; figure 240Q2425-69001 (exchange)RM1-0173-000CN (new)Laser/scanner a

408 Parts and diagrams Q2431-90912RC1-0070-000CN Roller, fixing pressure 3; figure 253RM1-0037-000CN Roller, paper feed; 1,500-sheet feeder 4; figure

Q2431-90912 8 Parts and diagrams 409Numerical parts listTable 118. Numerical pars listPart number Description ReferenceQ2425-67901 LJ4200 name plate

Q2431-90912 Chapter 1 Printer description 23Regulatory informationFCC regulationsThis equipment has been tested and found to comply with the limits fo

410 Parts and diagrams Q2431-90912RC1-0212-000CN Holder, paper pickup arm 3; figure 247RC1-0213-000CN Spring, compression 7; figure 247RC1-0244-000CN

Q2431-90912 8 Parts and diagrams 411RG1-4224-000CN Cable, envelope feeder 4; figure 240RG1-4231-000CN Cable, fuser (LJ 4300) 4; figure 253RG1-4236-00

412 Parts and diagrams Q2431-90912RM1-0037-000CN Roller, paper feed; 500-sheet feeder 6; figure 256RM1-0037-000CN Roller, separation; 500-sheet tray 3

Q2431-90912 Index 413IndexNumerics1,200-dpi resolution 471,500-sheet feedercables 399capacity 11connector interface 399control PCA 220, 343covers

414 Index Q2431-90912assemblies1,500-sheet feeder 399500-sheet feeder 391500-sheet feeder media-size sensor 391500-sheet feeder sensor cable 393br

415 Index Q2431-90912cassettes. See traysCD-ROM, softwaredocumentation contents 367part numbers 367character sets, selecting 46character voids in i

416 Index Q2431-90912countsestimated pages remaining for print cartridge 242jobs processed 242maintenance 249pages printed 241, 242resetting with

417 Index Q2431-90912DLC/LLC setting 52DOC (Declarations of Conformity) 26documentationCD-ROM contents 367ordering 28ordering related 362part numb

418 Index Q2431-90912EWS (embedded Web server)description 243Information tab 244links for support and supplies 245Networking tab 244opening 243requ

419 Index Q2431-90912fuserbias 73cable 389cleaning 55illustration and part numbers 389jam locations 295jams 280life expectancy 59modes 47operation

24 Printer description Q2431-90912Environmental product stewardship programProtecting the environment Hewlett-Packard Company is committed to providin

420 Index Q2431-90912Jjamsautomatic recovery 296avoiding 297common causes 297connection areas 328delivery areas 329duplexer 100, 303envelope feede

Q2431-90912 Index 421maintenanceagreements 29, 363kits for printer 366preventative maintenance notice 242remaining life of kit components 242settin

422 Index Q2431-90912Novell NetWareinformation on HP Jetdirect page 256settings 52number of copies, setting default 44NVRAM (nonvolatile random-acce

Q2431-90912 Index 423paper stack position sensor1,500-sheet feeder 343500-sheet feeder 340location 336operation 84paper stack sensor 382paper trans

424 Index Q2431-90912ppm (pages per minute) speed 8pre-feed sensorlocation 336operation 78, 79, 82, 87, 90, 92, 97, 100preferences. See settingsprepr

Q2431-90912 Index 425recoveryautomatic jam 296settings for jam 50recyclingprint cartridges 31, 242supplies 24website 31refilled print cartridges

426 Index Q2431-90912Sensors (continued)paper delivery, stacker and stapler/stacker 345paper inlet, stacker 105paper inlet, stacker and stapler/stac

Q2431-90912 Index 427specifications, printerenvironmental 5, 7space requirements 5temperature and humidity 8specks or dots on images, troubleshootin

428 Index Q2431-90912suppliesEWS status page 239memory error 274ordering 28, 362, 364ordering with EWS 245product, part, and exchange numbers 364r

Q2431-90912 Index 429top cover sensor 356top of page sensor 78, 87, 100connector 356location 336top output binsetting destination 44See also bins

Q2431-90912 Chapter 1 Printer description 25Material restrictionsThis HP product does not contain added mercury. This HP product contains lead in sold

430 Index Q2431-90912troubleshootingflowchart 234software 29, 363tools 239using control panel information pages 239using control panel messages 257u

copyright 2002Hewlett-Packard Company©http://www.hp.com*Q2431 **Q2431 *-90912-90912Q2431-90912

26 Printer description Q2431-90912Declarations of ConformityCanadian DOC regulationsComplies with Canadian EMC Class B requirements.Conforme à la clas

Q2431-90912 Chapter 2 Service approach 272 Service approachContentsService approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

28 Service approach Q2431-90912Service approachRepair of the printer normally begins with the use of the printer’s internal diagnostics in conjunction

Q2431-90912 Chapter 2 Service approach 29HP provides free telephone support during the product warranty period. When you call, you will be connected t

Q2431-90912 Table of contents iiiTable of contentsList of figuresList of tables1 Printer descriptionPrinter configurations . . . . . . . . . . . .

30 Service approach Q2431-90912Worldwide service and support offices ● For the U.S., call (1) (208) 323-2551 Monday through Friday from 6 A.M. to 6 P.

Q2431-90912 Chapter 2 Service approach 31Print-cartridge informationThe print cartridge is designed to simplify replacement of the major consumable pa

32 Service approach Q2431-90912Hewlett-Packard limited warranty statement1. HP warrants to you, the end-user customer, that HP hardware and accessorie

Q2431-90912 Chapter 2 Service approach 33Limited warranty for toner cartridge lifeNote The warranty below applies to the print cartridge that came wit

34 Service approach Q2431-90912

Q2431-90912 Chapter 3 Printer operation 353 Printer operationContentsUsing the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36 Printer operation Q2431-90912Using the control panelControl-panel layoutThe printer control panel consists of the following features:Figure 2. Cont

Q2431-90912 Chapter 3 Printer operation 37Control-panel buttonsThe following table explains the function of each button on the printer control panel.U

38 Printer operation Q2431-90912Settings and defaultsThe printer makes most printing decisions based on either temporary settings or permanent default

Q2431-90912 Chapter 3 Printer operation 39Control-panel menusOverviewMost routine printing tasks performed by the printer come from a computer using a

iv Table of contents Q2431-909123 Printer operationUsing the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

40 Printer operation Q2431-90912To change a control-panel setting1. Press the SELECT ( ) button to open the menus.2. Use the UP ARROW ( ) button or th

Q2431-90912 Chapter 3 Printer operation 41Retrieve Job menu This menu supplies a list of the jobs stored in the printer and provides access to the Job

42 Printer operation Q2431-90912Paper Handling menuIf paper-handling settings are correctly configured at the printer control panel, you can print by

Q2431-90912 Chapter 3 Printer operation 43TRAY [N] TYPE ANY*PLAINPREPRINTEDLETTERHEADTRANSPARENCYPREPUNCHEDLABELSBONDRECYCLEDCOLORCARDSTOCK > 164 g

44 Printer operation Q2431-90912Configure Device menuThis menu contains administrative functions in the following submenus:.● Printing submenu• PCL su

Q2431-90912 Chapter 3 Printer operation 45PCL sub-submenu (a submenu in the printing submenu)The following section lists the settings and their possib

46 Printer operation Q2431-90912Print Quality submenuSome items on this menu are available in the software program or the printer driver (if the appro

Q2431-90912 Chapter 3 Printer operation 47FUSER MODES PLAINPREPRINTEDLETTERHEADTRANSPARENCYPREPUNCHEDLABELSBONDRECYCLEDCOLORCARDSTOCK>164 G/M2ROUGH

48 Printer operation Q2431-90912RET OFFLIGHT*MEDIUMDARKUse the Resolution Enhancement technology (REt) setting to produce print with smooth angles, cu

Q2431-90912 Chapter 3 Printer operation 49System Setup submenuItems on this menu affect printer behavior. Configure the printer according to your prin

Q2431-90912 Table of contents vImage-formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118Electro

50 Printer operation Q2431-90912CLEARABLE WARNINGS *JOBONThe amount of time that a clearable warning is shown on the printer control-panel display.JOB

Q2431-90912 Chapter 3 Printer operation 51Stapler/stacker submenu This submenu allows you to select settings for the optional stapler/stacker, if one

52 Printer operation Q2431-90912I/O submenuItems on the I/O (input/output) menu affect the communication between the printer and the computer. The con

Q2431-90912 Chapter 4 Printer maintenance 534 Printer maintenanceContentsCleaning the printer and accessories . . . . . . . . . . . . . . . . . . . .

54 Printer maintenance Q2431-90912Cleaning the printer and accessoriesTo maintain superior print quality and performance, thoroughly clean the printer

Q2431-90912 Chapter 4 Printer maintenance 55Cleaning the fuserRun the printer cleaning page to keep the fuser free of toner and paper particles that c

56 Printer maintenance Q2431-90912Running the cleaning page manuallyIn order for the cleaning page to work properly, print the page on copier-grade pa

Q2431-90912 Chapter 4 Printer maintenance 57Running the cleaning page automaticallyUse the following procedure to set the printer to print cleaning pa

58 Printer maintenance Q2431-90912Performing preventative maintenanceYou should replace certain parts when the PERFORM PRINTER MAINTENANCE message app

Q2431-90912 Chapter 4 Printer maintenance 59Expected life of components The following table shows the expected life of certain components in the print

vi Table of contents Q2431-90912Paper-pickup assembly, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183Main drive as

60 Printer maintenance Q2431-90912Maintaining the stapler unitRemoving and replacing the stapler unitUse this procedure to replace a defective stapler

Q2431-90912 Chapter 4 Printer maintenance 616. Remove the new stapler unit from its packaging.7. Connect the cable on the new stapler unit to the stap

62 Printer maintenance Q2431-90912Loading staplesLoad staples if the printer control panel display prompts you with a STAPLER LOW ON STAPLES message (

Q2431-90912 Chapter 4 Printer maintenance 63Downloading a remote firmware updateNote Not all HP LaserJet 4200/4300 printers support remote firmware up

64 Printer maintenance Q2431-90912

Q2431-90912 Chapter 5 Theory of operation 655 Theory of operationContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66 Theory of operation Q2431-90912Envelope feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95Envelope feeder

Q2431-90912 Chapter 5 Theory of operation 67IntroductionThis chapter presents an overview of the relationships between major components in the printer

68 Theory of operation Q2431-90912Control system overviewThe control system consists of the power supply and the DC controller PCA. It controls the pi

Q2431-90912 Chapter 5 Theory of operation 69General descriptionsThis section describes individual components found in the printer. Information is prov

Q2431-90912 Table of contents viiImage-formation troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306Print qua

70 Theory of operation Q2431-90912Motor and fan controlThe HP LaserJet 4200 printer has three dc brushless motors. The main motor, the lifter driver

Q2431-90912 Chapter 5 Theory of operation 71Power supplyThe power supply consists of the fuser-control circuit, the high-voltage circuit, and the low-

72 Theory of operation Q2431-90912Fuser over-temperature protectionThe fusing heater safety circuit is located on the power supply and constantly moni

Q2431-90912 Chapter 5 Theory of operation 73High-voltage circuitThe high-voltage circuit produces the voltage biases that are applied to the primary c

74 Theory of operation Q2431-90912The developing voltage (bias) causes the toner to adhere to the electrostatic image that the laser/scanner assembly

Q2431-90912 Chapter 5 Theory of operation 75Overcurrent/overvoltage protectionIf a short-circuit or other problem on the load side causes an excessive

76 Theory of operation Q2431-90912Laser/scanner assemblyThe laser/scanner produces the latent electrostatic image on the photosensitive drum in the pr

Q2431-90912 Chapter 5 Theory of operation 77Laser/scanner controlThe laser/scanner control circuit on the laser driver PCA turns the laser diodes on a

78 Theory of operation Q2431-90912Paper pickup systemThe paper pickup and feed system consists of various kinds of pickup and feed rollers that are dr

Q2431-90912 Chapter 5 Theory of operation 79The paper pickup and feed system is divided into two blocks. The paper pickup/feed block, and the fuser/de