29
R-1200
R-1201
1. Disconnect the power supply cord.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Remove door assembly, referring to "DOOR
REPLACEMENT".
Replacement of door components are as follows:
5. Place door assembly on a soft cloth with latches facing
up.
Note: As the engaging part of choke cover and door frame
are provided at 15 places, do not force any particular
part.
CHOKE COVER
6. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
Figure C-4 to free engaging parts.
7. Pry the choke cover by inserting a putty knife in order
shown in Figure C-4.
8. Now choke cover is free from door panel and door frame.
NOTE: When carrying out any repair to the door, do not
bend or warp the slit choke (tabs on the door
panel assembly) to prevent microwave leakage.
DOOR FRAME ASSEMBLY
9. Remove four (4) screws holding the door panel to the
door frame assembly.
10.Release the door panel from the door frame assembly.
NOTE: It is easier to release the engaging parts of the upper
or lower door hinge pin side at first.
11.Now, door frame assembly is free.
LATCH SPRING, LATCH HEAD AND DOOR PANEL
12.Release the latch spring from the tab of the latch head
and tab of the door frame.
13.Release the latch head from the door frame.
14.Now, the latch spring and latch head are free.
Figure C-4. Door Disassembly
LSI UNIT
9. Remove the two (2) screws holding the PWB cover to
the door frame assembly.
10.Remove the PWB cover from the door frame assembly.
11.Disconnect the ribbon cable of the key unit from the LSI
unit.
DOOR DISASSEMBLY
12.Releasing the two (2) lower tabs, remove the LSI unit
with the LCD holder from the door frame assembly.
13.Disconnect the 9-pin wire harness from the LSI unit.
14.Releasing the two (2) tabs, release the LCD from the
LCD holder.
15.Releasing the four (4) tabs, remove the LCD holder from
the LSI unit.
16.Now the LSI unit is free.
NOTE: For 9-pin wire harness
1. When the PWB cover is reinstalled, route the 9-pin
wire harness under the hole of the PWB cover as
shown in Figure C-5.
2. Before the door panel is reinstalled to the door frame
assembly, make sure that the 9-pin wire harness is
held by the two (2) tabs and one (1) hole on the door
frame as shown in Figure C-5. And the marking
portion on the 9-pin wire harness should be held by
right tab on the door frame as shown in Figure C-5.
Figure C-5. Door frame assembly
NOTE: For key unit
1. Before attaching a new key unit, wipe off remaining
adhesive on the door frame surfaces completely with
a soft cloth soaked in alcohol.
2. When attaching the key unit to the door frame, adjust
the upper edge and left edge of the key unit to the
correct position of door frame.
3. Stick the key unit firmly to the door frame by rubbing
with soft cloth not to scratch.
NOTE: For LSI unit
Handle the LSI unit carefully so that the ribbon cable
does not come off. Because the ribbon cable is
glued on the LCD and the printed wiring board only
by heated paste.
Figure C-6. LSI unit
Choke cover
Upper door stopper
Lower
door stopper
Putty knife
Door frame
A
Printed wiring board
of LSI unit
Liquid Crystal
Display (LCD)
Ribbon cable
Hole
Tab
Tab
Tab
Tab
Tabs
LSI unit
Tab
Marking
9-pin wire
harness
9-pin wire
harness
Hole
Door frame
Cushion
PWB cover
Screws
