Samsung MAX-870 Service Manual page 30

Troubleshooting
6-1-4 Tape
JIC3 (HA12203) B+, B-
Voltage normal?
JIC3 (HA12203) pin2,4,39,41
Input signal normal?
JIC3 (HA12203) pin8,35
Output signal normal?
Check the Main PCB
FIC2 (TDA7439)
6-4
Tape PCB
Yes
Tape PCB
Yes
Tape PCB
Yes
Function IC
No
Check the Tape PCB
JZD1, JZD2, FZD2
No
Check the Tape PCB
DCW8, DCW9, JIC1,JIC2
No
Check the Tape PCB
JIC3, JIC5
Samsung Electronics