Samsung MAX-610 - Troubleshooting

6. Troubleshooting
6-1 Amplifier
6-1-1 Power Malfunction
Front PCB µ-com VDD(5V)
normal? 
UIC1 pins 18,47,90
Replace RIC1
Main PCB RIC1(BA3950) IN: 23V
Input voltage normal?
Yes
Check the Power PCB; 
RD7,8,13(1N5392)

Yes
Front PCB 
Does UX1(12MHz) 
oscillate ?
FRONT PCB PWR-SENS
voltage normal ?
(pin 27 ; 5V)
Check the Main PCB
RD16,RR10,11,12,RC12
RD9
Yes
Front PCB 
When the power is
ON 'H' displays
at pin 5 ?(5V)
Yes
Connect Front PCB and Main PCB.
Check the connector Main PCB.
Wafer MCW2
No

Replace µ-com.
Yes
No
No
No
No
Check the Power PCB : P/T, FUSE
No
Samsung Electronics 6-1