R-464 (serv.man4). Control panel, component replacement and adjustment procedure - Sharp Home Appliance Service Manual (repair manual). Page 11

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from the CPU unit.

12.Disconnect the 7-pin wire harness from the CPU unit.
13.Disconnect the ribbon cable of the key unit from the

CPU unit.

14.Now the CPU unit is free.

DOOR FRAME ASSEMBLY
15.Releasing the four (4) tabs, remove the 7-pin wire

harness from the door frame assembly.

16.Now, the door frame assembly is free.

1. Before the PWB cover is reinstalled to the door

frame assembly, route the 7-pin wire harness
under the tab of LCD holder as shown in Figure C-
9(a). And when the PWB cover is reinstalled, route
the 7-pin wire harness under the hole of the PWB
cover.

2. Before the door panel is reinstalled to the door

frame assembly, make sure that the 7-pin wire
harness is held by the four (4) tabs and two (2)
holes on the door frame assembly as shown in
Figure C-9(b).

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 right 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.

Handle the CPU 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.

Printed wiring board 

of CPU unit

Liquid Crystal

Display (LCD)

Ribbon cable

PWB Cover

CPU unit

Door frame

Hole of 
PWB cover

Tab of LCD holder

7-pin wire harness

PWB Cover

Tab

Tab 

Tab

Hole on door frame

Hole on door frame

Hole of PWB cover

Door frame

Tab

7-pin wire harness