HP CyberChiller Series Service Manual download pdf (Page 30)

R-320FK

R-320FQ

R-320FW

POWER TRANSFORMER REMOVAL

Reinstallation

1. Rest transformer on the bottom plate with its primary

terminals toward the oven face plate.

Secure transformer with four screws to bottom plate.

3. Re-connect wire leads (primary) to power transformer

and filament leads and high voltage wire of transformer

to magnetron and high voltage capacitor. Refer to

"PICTORIAL DIAGRAM" on page 33.

4. Re-install outer case and check that oven is operating

properly.

1. Disconnect the power supply cord and then remove

outer case.

2. Open the oven door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect wire leads (primary) from power transformer

and the filament leads and high voltage wire from the

magnetron and capacitor terminals.

5. Remove four (4) screws holding transformer to bottom

plate.

6. Remove transformer from bottom plate.

1. Disconnect the power supply cord, and then remove

outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Open covers of the terminal insulator by using small flat

type screw driver.

5. Remove the receptacle from the terminal insulator.

6. Now, the terminal insulator is free.

Installation

1. Insert the receptacle into terminal insulator.

2. Close covers of the terminal insulator, as shown below.

3. Reconnect all leads removed from components during

testing.

4. Reinstall the outer case (cabinet).

5. Reconnect the power supply cord after the outer case is

installed.

6. Run the oven and check all functions.

Terminal

insulator

Flat type

screw driver

RECEPTACLE

COVERS

TERMINAL INSULATOR REPLACEMENT

CAUTION: 1. DISCONNECT OVEN FROM POWER SUP

PLY BEFORE REMOVING OUTER CASE.

2. DISCHARGE THE HIGH VOLTAGE CA-

PACITOR BEFORE TOUCHING ANY OVEN

COMPONENTS OR WIRING.

HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL

1. Disconnect the power supply cord and then remove

outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect the high voltage wire of the power transformer

from the high voltage capacitor.

5. Disconnect the high voltage wire of high voltage rectifier

assembly from the magnetron.

6. Disconnect the filament lead (short one) of the power

transformer from the high voltage capacitor.

7. Remove two (2) screws holding capacitor holder to

oven cavity rear plate.

8. Remove one (1) screw holding high voltage rectifier

assembly to capacitor holder.

9. Disconnect rectifier terminal from capacitor.

High voltage rectifier assembly is now free.

10.Remove capacitor holder. Capacitor is now free.

CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI-

FIER AND HIGH VOLTAGE CAPACITOR,

GROUND SIDE TERMINAL OF THE HIGH

VOLTAGE RECTIFIER MUST BE SECURED

FIRMLY WITH A GROUNDING SCREW.

MAGNETRON REMOVAL

Removal

1. Disconnect the power supply cord and then remove

outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Disconnect all wire leads from magnetron.

5. Remove the five (5) screws holding chassis support to

magnetron, oven cavity back plate, oven cavity front

flange and fan duct.

6. Remove the chassis support from oven.

7. Carefully remove the four (4) screws holding magnetron

to waveguide flange.

8. Lift up magnetron with care so that magnetron antenna

is not hit by any metal object around antenna.

NOTE: When replacing the outer case, the 2 special

Torx screws must be reinstalled in the same

locations.

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HP CyberChiller Series Service Manual Page 30

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