Sharp R-880B Service Manual page 30

R-880B
5. Release the capacitor holder from the fan duct.
6. Remove the capacitor from the capacitor holder.
7. Now, the capacitor should be free.
8. Release H.V. wire A from the high voltage rectifier
assembly.
9. Now, the high voltage rectifier assembly should be free.
1. CARRY OUT 3D CHECKS.
2. Disconnect the filament leads of high voltage trans-
former from high voltage capacitor and the magnetron.
3. Disconnect the high voltage wire of high voltage
rectifier assembly from the high voltage transformer.
4. Disconnect the main wire harness from the high volt-
1. CARRY OUT 3D CHECKS.
2. Release the tabs of air intake duct from the chassis
support and the oven cavity.
3. Disconnect the high voltage wire of the high voltage
rectifier assembly and filament lead of the transformer
from the magnetron.
4. Remove the one (1) screw holding the chassis support
to the magnetron.
5. Move the air intake duct to left.
6. Carefully remove four (4) screws holding magnetron to
POSITIVE LOCK
1. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock
3. Pull down on the positive lock
CAUTION: WHEN CONNECTING THE POSITIVE
®
LOCK CONNECTORS TO THE TERMI-
NALS, INSTALL THE POSITIVE LOCK
CONNECTOR SO THAT THE LEVER FACES
YOU
CONTROL PANEL ASSEMBLY
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness, thermistor harness,
AH sensor harness and the switch harness from the
power unit and control unit.
3. Straighten the tab of the oven cavity front flange
holding the tab of the control panel frame.
4. Lift up the control panel assembly.
5. Now, the control panel assembly is free.
CONTROL UNIT
6. Disconnect the flat ribbon cable from the connector CN-G.
7. Remove the two (2) screws holding the CPU unit to the
control panel frame.
8. Release the four (4) tabs of the control panel frame
holding the CPU unit to the control panel frame.
9. Release the liquid crystal display (LCD) from the LCD
holder.
10.Now, the LCD sheet is free.
HIGH VOLTAGE TRANSFORMER REMOVAL
MAGNETRON REMOVAL
® CONNECTOR (NO-CASE TYPE) REMOVAL
® connector.
®
connector.
®
Figure C-1 Positive lock
CONTROL PANEL ASSEMBLY REMOVAL
CAUTION: WHEN REPLACING HIGH VOLTAGE
RECTIFIER ASSEMBLY, ENSURE THAT
THE CATHODE (EARTH) CONNECTION
IS SECURELY FIXED TO THE CAPACI-
TOR HOLDER AND BASE PLATE WITH
AN EARTHING SCREW.
age transformer.
5. Remove the four (4) screws holding the transformer to
base plate.
6. Remove the transformer.
7. Now the high voltage transformer is free.
waveguide, when removing the screws hold the mag-
netron to prevent it from falling.
7. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal object
around the antenna.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
Positive lock®
connector
Lever
® connector
11.Release the two (2) tabs of the LCD holder holding the
CPU unit to the LCD holder.
12.Remove the LCD holder from the CPU unit.
13.Remove the two (2) screws holding the power unit to
the control panel frame.
14.Release the four (4) tabs of the control panel frame
holding the power unit to the control panel frame.
1 5. Now, the control unit (CPU unit + Power unit) is free.
NOTE: 1. Before attaching a new key unit, wipe off re-
maining adhesive on the control panel frame
surfaces completely with a soft cloth soaked in
alcohol.
2. When attaching the key unit to the control panel
frame, adjust the upper edge and right edge of
the key unit to the correct position of control
panel frame.
3. Stick the key unit firmly to the control panel
frame by rubbing with soft cloth not to scratch.
28
Terminal
4
Push
5
Pull down