Samsung MAX-670 Service Manual page 22

Troubleshooting
6-2-3 No Output
Main PCB DIC2
(HC14066), pin no. 7,14
; Check signal
Check signal of pin no.
3,13V of DIC1 ?
Check signal of pin no. 1,2
of JIC1 ?
Check signal of pin no. 43,45
of JIC1 ?
6-6
O
X
O
X
X
O
X
Check the B+ power
source part in RIC3(KA7812),
IN ; 15V, OUT ;12V
Check B+ of pin no. 10
of DIC1 ?
O
Replace RQ4
Check B+ ; 10V of pin no.22
of JIC1 ?
Replace JIC1
X
Check RIC3(KA7812)
IN ; 15V, OUT ; 12V
Samsung Electronics