Sharp Carousel R-1200 Panduan Servis - Halaman 31

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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.

Choke cover

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

Upper door stopper

Lower

door stopper

Putty knife

Door frame

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.

Screws

PWB cover

Cushion

Hole

Tabs

LSI unit

Tab

Door frame

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.

Ribbon cable

Figure C-6. LSI unit

R-1200

R-1201

Marking

Tab

9-pin wire

harness

Tab

Hole