Samsung SR-69NMC Diagnosis of disorder and method of repair, ELECTRICAL SR-61KTC,65KTC, －36－

9.Diagnosis of disorder and method of repair

1.ELECTRICAL (SR-61KTC,65KTC)

Preliminary examamination

1.Check the power of consent and power code

2.Check it based on the :References” on the next pages.

1.No input Power

START
		Y
Ohiy aline AC 220V FUSE?
POWER CARD connection	N
Is confimate 220V the		N
CN10 both sides?

Change main fuse

-Caution-

MAIN PCB power part is appesred high-pressure.

Y

Only a line FUSE of MAINPCB?

N

Is confimate 300V the

BD 1(+),(-),?

Y

Is confimate DC5.

8Vthe the TOP S/W 223Y among ‘C-S’?

Y

Is confimate 12v the both C104sides to?

Y

N

N

N

Check the eletric wire construction

Change fuse-250V 2A

Change PCB PATTERN and change BD1

Change PCBASSY

		Y
	Is confimate 5v the both		N
	sides to c103?
		Y
			N
	Is PANEL PCB O.K?
LEAD WIRE CABI, DOOR		Y
(Cooent to the upside)

Change D102(D10SC9M)

Change Reg1 (7805)

1.	Check assembly line
	and repair
2.	Change parel PCB

Is RELAY O.K?

Y

Nomal state

N

1.	Change pertinet RELAY.
2.	Check contacted
	LEADWIRE.

－36－