Measures To Be Taken When The Protection Circuit Operates; Operation Of Power Block Protection Circuit - Samsung MX-J730 Service Manual

4.2. Measures to be taken when the Protection Circuit operates

4.2.1. Operation of Power Block Protection Circuit

■ 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 ℃.
3) There is no power supply for amp.
■ Protection Circuit operates when power problem occurs in the SMPS.
MX-J730
SMPS PCB
Copyright© 1995-2013 SAMSUNG. All rights reserved.
Location
+PVDD (+33 V)
CN851
P-ON (+5.3 V (1#)
Pin No.
+5.3 V (5#)
(15 ~ 16#)
5 V (9#)
4. Troubleshooting
Protection
Open Short
X X
X X
X X
X X
Remark
4-5