HP 300i Service Manual download pdf (Page 95)

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The Keyboard Assembly

5-5

Figure 5-2 Removing the Keyboard Overlay

A. Overlay notches

5. Using two screwdrivers, place the blade of one screwdriver on the leftmost latch of

the keyboard assembly and push toward the rear of the cardiograph. See Figure 5-3.

Carefully insert the blade of the second screwdriver in a notch to the right or left of

the latch and lift up on the keyboard assembly. The leftmost latch should unlatch.

Repeat with the center and rightmost latches.

Figure 5-3 Removing the Keyboard.

A. Notches

B. Latches

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 ... 163 164

Service Manual 1
0Notice 2
Warranty 4
Limitation of Warranty 4
Printing History 5
Safety Summary 6
0Preface 8
Contents 9
Introduction 13
Inquiries 15
Specification Data 15
Parameter Specification 18
Options and Accessories 20
Performance Verification 25
Extended Self-test 26
Prefix CND 30
Printer Test 36
Keyboard Tests 37
ECG Simulation 38
Resetting the PageWriter 100 41
Preventive Maintenance 42
Caring for the Battery 46
Safety Tests 47
Verification Matrix 48
Theory of Operation 53
Circuit Descriptions 54
The Patient Cable 55
CPU Assembly 56
CPU/System Oscillator 57
2Q6WDQGE\ 58
ECG Front End 59
ROM-1 and ROM-2 Address Space 59
Printer Gate Array/SRAM 59
Motor Driver 60
Analog/Digital Converter 60
Thermal Printhead 60
System Expansion Connector 60
Power Supply 61
Opto-Isolators 64
Calibration 64
Defibrillator Protection 64
M177XA Expansion Connector 66
Gate Array 66
ROM-X1, ROM-X2 66
Troubleshooting 69
Test Tools 70
The Error and Event Logging 71
Messages 71
Troubleshooting Tables 72
Printer door open or 78
Table 4-5 Printer 78
Chart Speed 78
Table 4-10 Recorder Problems 86
Problem Corrective Action 86
Testing the Power Supply 87
Removal and Replacement 91
The Battery 92
A Battery door 93
The Keyboard Assembly 94
Replacing the Keyboard 97
The Top Cover Assembly 98
The Printer Door Assembly 100
The Printer Drive Assembly 101
The Printhead Assembly 103
The Control Board Assembly 107
The Power Supply 108
The Fuses 110
The Internal Cables 111
Replacing the Printer Cables 113
Parts Lists 115
Ordering Information 116
Calling for Service 117
Parts List 118
Language Part Number 127
× 2 (2 req’d) 137
Connector Pin Assignments 147
CPU Assembly Connectors 148
Signal Definition 149
On-Standby 149
Pin Signal Pin Signal 150
On/Standby 152
Pin Signal 160
Index - 1 161
Index - 2 162
Index - 3 163
Index - 4 164

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HP 300i Service Manual Page 95

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