Samsung MX-C730D, Service Manual

Page: 29 / 62

Samsung Electronics 4-5
Troubleshooting
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.
SMPS PCB
Location Pin No.
Protection
Remark
Open Short
CON3
+12V (6, 9#) X X
D5.6V (1~4#)
X X
CON2
+PVDD (about +38V)
(1~4#)
X

C630 about
+27.5V
-PVDD (about -38V)
(11~14#)
X

C630 about
-27.5V
+5V (7#)
X X
-5V (8#) X X
<Table 4-1>