Measures To Be Taken When The Protection Circuit Operates; Operation Of Power Block Protection Circuit - Samsung MX-F730 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-F730/F730D
SMPS PCB
Copyright© 1995-2013 SAMSUNG. All rights reserved.
Location
+PVDD (+34V) (13&15#)
CNM802
P-ON (+5 V) (7#)
Pin No.
+5.3 V (2~3#)
+PVDD (10#)
4. Troubleshooting
Protection
Open Short
X X
X X
X X
X X
Remark
4-5