Measures To Be Taken When The Protection Circuit Operates - Samsung MX-C730D Service Manual

4-2 Measures to be taken when the Protection Circuit operates
4-2-1 SMPS Check Flow-SMPS Protection
Cases of the SMPS Protection.
1. If there is over current at the AMP IC (Speaker Wire Short)
2. If temperature of the AMP IC is over 150°C.
3. There is no power supply for AMP.
Location
CON3
SMPS PCB
CON2
Samsung Electronics
Pin No.
+12V (6, 9#)
D5.6V (1~4#)
+PVDD (about +38V)
(1~4#)
-PVDD (about -38V)
(11~14#)
+5V (7#)
-5V (8#)
<Table 4-1>
Protection
Open Short
X X
X X

X

X
X X
X X
Troubleshooting
Remark
C630 about
+27.5V
C630 about
-27.5V
4-5