Samsung NA-C10, Service Manual

Page: 4 / 41

8. Troubleshooting
8-1 Power Malfunction
Main PCB
µ
-com VDD(5V)
normal?
UIC1 pin no. 18,47,90
Top PCB ARIC1(K7805) IN: 10V
Input voltage normal?
Main PCB PWR-SENS
voltage normal ?
(pin no. 27;5V)
Main PCB
Does UX1(6MHz)
oscillate?
Main PCB
When the power is
ON 'H' displays
at pin no. 5 ?(5V)
Replace ARIC1
Check the Power PCB ;
ARD 1, 2, 3, 4 (IN5392)
AF2 (1.25A Fuse)
Connect Top PCB and Main PCB.
Check the connector Main PCB.
Wafer ucw3
No No
Check the Main PCB
ARZD1, ARR 7, ARR6
ARD5, ARC5, 12
No
No
No
No
Yes
Yes
Yes
Yes
Replace
µ
-com.
Check the Power PCB : P/T, FUSE
Yes
Samsung Electronics 8-1