Sharp R-1482 Service Manual page 33

the control panel.
17.Remove the key fixing plate from the control panel.
18.Tear the key unit from the key fixing plate.
19.Now, the key unit is free
NOTES FOR KEY UNIT REPLACEMENT
1. Do not reuse the torn key unit because the performance
of the adhesive becomes weak.
2. Before attaching a new key unit, wipe off remaining
adhesive on the key fixing plate surfaces completely with
a soft cloth soaked in alcohol.
3. When attaching the key unit to the key fixing plate, adjust
the upper edge and right edge of the key unit to the
correct position of key fixing plate.
4. Stick the key unit firmly to the key fixing plate by rubbing
with soft cloth not to scratch.
NOTES FOR NEW CONTROL UNIT REPLACEMENT
1. Before installation of the new CPU into the control panel,
grasp the middle section between thumb and finger,
bend the display board forward a until b breaks as
shown in step 1.
2. To remove the middle section push both sides of the
middle section towards d until c breaks as shown in
step 2.
NOTE: Discard the middle section.
3. After removing the middle section, bend the display
board 90˚, positioning the jumper wires into the notches
a
b
Middle
Section
Jumper
wires
STEP 1
POSITIVE LOCK
1. Disconnect the power supply cord and remove the oven
from wall and remove outer case. (Refer to procedure of
"Removal of Oven from Wall" and "Outer case Removal")
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, IN-
STALL THE POSITIVE LOCK
LEVER FACES YOU
DOOR SENSING SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL
1. Disconnect the power supply cord and remove the oven
from wall and remove outer case. (Refer to procedure of
"Removal of Oven from Wall" and "Outer case Removal")
d
c
Notches
STEP 2 STEP 3
®
CONNECTOR (NO-CASE TYPE) REMOVAL
®
connector.
®
connector.
®
® SO THAT THE
31
of the display board as shown in step 3.
4. Insert the bottom edge of the display board under the tab
of control panel as shown in step 4.
5. Place the top edge of the display board on the clip (F).
And press the display board downward as shown in step
4. (Holes in middle of display board should be positioned
into locator pins.)
6. After installing display board, press the CPU downward
90˚ until CPU is locked into place by the clips.
7. Hold the CPU with the four (4) screws.
8. After installing CPU, make sure jumper wires are not
bent, touching or broken.
Top edge of the display board
Middle
section
CN-G
Jumper
wires
Control
panel
Clip (E)
STEP 4
Positive lock®
connector
Lever
Positive lock
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Remove the control panel assembly, referring to the
R-1480
R-1481
R-1482
Display
Board
b
Break
point
c
LSI
Control Unit
Clip (F)
Locator pin
Terminal
4
Push
5
Pull down
® connector