Sharp R-9H56, Service Manual

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R-9H56
28
ASYMMETRIC RECTIFIER AND HIGH VOLTAGE RECTIFIER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove one (1) screw holding the high voltage rectifier
terminal to the capacitor holder.
3. Disconnect the high voltage rectifier assembly from the
capacitor.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI-
FIER ASSEMBLY, ENSURE THAT THE
EARTHING SIDE TERMINAL MUST BE SE-
CURED FIRMLY WITH AN EARTHING
SCREW.
HIGH VOLTAGE CAPACITOR REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the high voltage wire leads and rectifier
assembly from the high voltage capacitor and magnetron.
3. Disconnect filament lead of transfomer from high voltage
capacitor.
4. Disconnect high voltage wire leads of capacitor from
transformer.
5. Remove one (1) screw and washer holding the high
voltage rectifier from the capacitor holder.
6. Remove one (1) screw holding capacitor holder to rear
cabinet.
7. Remove the high voltage capacitor from the holder.
1. CARRY OUT 3D CHECKS.
2. Pull the wire leads from the oven lamp socketby pushing
the terminal hole of the oven lamp socket withthe flat type
small screw driver.
3. Lift up the tab of oven lamp mounting plate holding the
oven lamp socket.
4. Slide the oven lamp socket left-ward.
5. Now, the oven lamp socket is free.
CAUTION: WHEN REPLACING THE OVEN LAMP
SOCKET, REPLACE IT SO THAT THE SIDE
WHERE THE BLACK DOT IS PUT FACES
UPWARD.
OVEN LAMP SOCKET REMOVAL
HEATER UNIT ASSEMBLY REMOVAL (HEATING ELEMENT/THERMISTOR)
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from oven thermal cut-out,
convection motor, thermistor and heater element.
Remove convection motor ass’y refer to “Convection
Motor Removal No.3 to No.5”.
3. Remove eleven (11) screws holding heater duct to the
oven cavity.
4. Release two (2) snap bands holding wire harness to the
thermal protection plate (left).
5. The heater unit is now free.
HEATING ELEMENT AND THERMISTOR
1. Remove two (2) screws holding heating element to
heater duct.
2. Loosen two (2) screws holding holders to heater duct
and take heating element out of heating element holders.
3. Heating element is free.
4. Remove two (2) screws holding thermistor to heater
duct.
5. Thermistor is free.
Oven lamp
socket
Terminal
Wire lead
Flat type small
screw driver
Terminal hole
CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL
To remove the control panel, proceed as follows:
1. CARRY OUT 3D CHECKS
2. Disconnect connector CN-A, CN-E, CN-B, CN-F, TAB1,
TAB2 and TAB3 from the control unit.
3 Remove one (1) screw holding the control panel back
plate to the chassis support.
4. Remove the one (1) screw holding the bottom edge of
the back plate to the cabinet base.
5. Remove two (2) screws holding the back plate to the
oven cavity flange.
6. Lift up and pull the control panel forward.
Replacement of individual component is as follows:
CONTROL UNIT AND KEY UNIT
1. Disconnect the wire connector from the control unit.
2. Remove the four (4) screws holding the panel frame to
the back plate.
3. Separate the panel frame and back plate.
4. Remove the three (3) screws holding the control unit to
the panel frame.
5. Lift up the control unit and disconnect the key connector
from the control unit.
6. Now, the control unit and frame assembly are separated.
NOTE: 1. Before attaching a new key unit, remove remaining
adhesive on the control panel frame surfaces
completely with alcohol and so on.
2. When attaching the key unit to the control panel
frame, adjust the lower 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.
Black dot