Samsung CM1929, Service Manual

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4. Disassembly and Reassembly
4-6 Replacement of Control Circuit Box Assy and P.C.Board
4-6-1 Removal of Control Box Assembly
1 . Be sure to discharge any static electric charge built up on your body and avoid touching the touch control
circuitry .
2 . Remove 3 screws securing the Control Box Ass’y to the oven cavity .
3 . Disconnect all the lead wires, connectors and ground taping from the main control circuit board (PCB1) .
4 . Lift up the FPC connector hooks about 5mm upward which connects to the main control circuit board (PCB1)
from the tail of switch membrane of the control box assembly .
5 . Remove a screw securing the tapped taping to PCB1 .
6 . Remove Control Box Ass’y .
7 . To replace Digitron, remove 2 screws securing the PCB 4 .
8 . To replace Start Button Circuitry, remove 2 screws securing the PCB3 .
9 . Unbend the metal tabs holding the Panel -Base to Control Box body .
4-6-2 Removal of main P.C.Board
1 . Remove Control Box Assembly by following the steps 1~ 5 at left .
2 . Remove 4 screws securing the main P .C .Board to the bracket P .C .Board .
NOTE : When handling the the touch control circuitry, be most careful to avoid damage .
Control Box Assy
Switch-Membrane
Digitron(PCB4)
PCB3
Wire Harness-F
Window-Display
Cover-Panel/L
Cover-Panel/R
Main P.C.Board
(PCB1)
Panel Base
Cover Panel
Wire Harness-B
Wire Harness-C