Measures To Be Taken When The Protection Circuit Operates; Operation Of Power Block Protection Circuit - Samsung MX-D850 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.
Location
SMPS PCB CON803
CON802
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Pin No.
+8V (5, 8)
D5.6V (1, 2, 3)
PVDD (about +55V) (14 ~ 19)
-55V (1 ~ 6)
Protection Circuit Operation
Open Short
X X
X X
X ○
X ○
4. Troubleshooting
Remark
4-5