Positive Lock Connector (No-Case Type) Removal; Control Panel Assembly Removal; Graphic Sheet And Membrane Switch Replacement - Sharp R-231NW Service Manual

[6] POSITIVE LOCK CONNECTOR (NO-CASE TYPE) REMOVAL

1. Disconnect the power supply cord, and remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Push the lever of positive lock
5. Pull down on the positive lock
CAUTION: WHEN CONNECTING THE POSITIVE LOCK
CONNECTORS TO THE TERMINALS,
INSTALL THE POSITIVE LOCK
LEVER FACES YOU.

[7] CONTROL PANEL ASSEMBLY REMOVAL

1. Disconnect the power supply cord and remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads from the control unit.

[8] GRAPHIC SHEET AND MEMBRANE SWITCH REPLACEMENT

1. 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. Remove the two (2) screws holding the control unit to the
control panel frame. And remove the control unit.
6. Remove the rubber connector from the long slit on the
control panel frame.
7. Tear away the graphic sheet from the control panel frame.
8. Tear away the membrane switch from the control panel
frame.
2. REINSTALL
1. Remove remaining adhesive on the control panel frame
surfaces with a soft cloth soaked in alcohol.
2. Tear the backing paper from the new membrane switch.
3. Insert the ribbon cable of the membrane switch into the slit
of the control panel frame.
4. Adjust the upper edge and right edge of the membrane
switch to the small depression on the surface of the control
panel frame.
5. Attach the membrane switch to the control panel frame by
rubbing with a soft cloth not to scratch.
connector.
®
connector.
®
®
SO THAT THE
®
Control panel frame
Large
depression
Small
backing
paper
Ribbon
cable
Membrane
Graphic
switch
sheet
Figure C-2. Graphic Sheet and Membrane Switch Replacement
Figure C-1. positive lock
5. Remove the one (1) screw holding the control panel to the
front plate of the oven cavity.
6. Now, the control panel assembly is free.
6. Tear the backing paper from the new graphic sheet.
7. Adjust the upper edge and left edge of the graphic sheet
to the large depression on the surface of the control panel
frame.
8. Attach the graphic sheet to the control panel frame by
rubbing with a soft cloth not to scratch.
9. Tear the small backing paper from the ribbon cable of the
membrane switch.
10. Attach the ribbon cable to the control panel frame rear side.
11. Place the edge of the membrane switch's ribbon cable on
the lower portion of the liquid crystal display.
12. Insert the rubber connector into the long slit on the control
panel frame.
13. Reinstall the control unit to the control panel frame with the
two (2) screws.
NOTE: Do not contact the contact surface of the ribbon
cable (edge) and the rubber connector directly
with your fi ngers. This is to avoid oxidized.
If display digits are missing or scrambled, remove
control unit and clean 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 connector. Make sure
that there is no trash or foreign substance on
contact surface of the rubber connector.
Liquid crystal
display
Slit
Ribbon cable
of membrane
switch
Small
depression
11 - 3
Terminal
®
Positive lock
connector
1
Push
Lever
2
Pull down
® connector
Control panel frame
(Rear side)
Long slit
Contact surface
Rubber connector
R-231NW