Sharp R-320HK, Service Manual

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R-320HK
R-320HQ
R-320HW
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. Push the lever of positive lock
® connector.
5. Pull down on the positive lock ® connector.
CAUTION: WHEN CONNECTING THE POSITIVE LOCK ®
CONNECTORS TO THE TERMINALS, CON-
NECT THE POSITIVE LOCK
® SO THAT THE
LEVER FACES YOU
POSITIVE LOCK
®
CONNECTOR (NO-CASE TYPE) REMOVAL
Terminal
Push
Pull down
1
2
Lever
Positive lock®
connector
Figure C-1. Positive lock
®
connector
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 wire leads from control unit.
CONTROL PANEL ASSEMBLY REMOVAL
5. Remove the one (1) screw holding the control panel
assembly to the oven flange.
6. Slide the control panel assembly upward and remove it.
7. Now, individual components can be removed.
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. Remove the control panel assembly, referring to chapter
of CONTROL PANEL ASSEMBLY REMOVAL.
5. Tear away the graphic sheet from the control panel
frame and control unit assembly
6. Remove the two (2) screws holding the control unit
assembly to the control panel frame.
7. Release the ontrol unit assembly from the six (6) tabs of
the control panel frame.
8. Now, the ontrol unit assembly is free.
Installation
1. Remove remaining adhesive on the control panel frame
surfaces with a soft cloth soaked in alcohol.
2. Make sure that the LED sheet and liquid crystal display
are installed in position.
3. Reinstall the control unit assembly to the control panel
frame with the two (2) screws.
4. Tear the backing paper from the graphic sheet.
5. Adjust the upper edge and left edge of the graphic sheet
to the large depression on the surface of the control
panel frame.
6. Attach the graphic sheet to the control panel frame by
rubbing with a soft cloth not to scratch.
NOTE:
Do not contact the contact surface of the ribbon cable
(edge) and the rubber connector directly with your
fingers. This is to avoid oxidized. If display digits are
missing or scrambled, remove control unit and clean
CONTROL UNIT ASSEMBLY REPLACEMENT
Figure C-2. Graphic Sheet Attachment
contact surface with alcohol. After cleaning, do not
attach the rubber connector until alcohol dries up. Do
not use alcohol or solution to clean the rubber connec-
tor. Make sure that there is no trash or foreign sub-
stance on contact surface of the rubber connector.
Graphic sheet
Liquid
crystal display
Control panel
frame
LED sheet
Rubber connector
Contact surface
Ribbon cable
of membrane
switch
Control panel frame
(Rear side)
(Rear View)