Measures To Be Taken When The Protection Circuit Operates - Samsung HT-Z410 Service Manual

Troubleshooting
4-2 Measures to be taken when the Protection Circuit operates
4-2-1 Operation of Power Block Protection Circuit
The Condition of Power Protection Active.
1. Voltage of SMPS's PVDD (+35V, J3) is higher or lower than Standards.
Normal Condition Voltage Range: PVDD (+35V, J3): about 35V
2. Over-current occurs to AMP IC. (Over-output or Output short)
3. AMP IC's temperature exceed 150°C.
4. No supply voltage on GATE DRIVER.
Part
Location
CN3
Z410/510
SMPS
J3
4-2-2 Power Protection
1. OTW: Active, IC's inner temperature exceeds over 150°C.
(Under 2.7V, Protection Circuit wills Active)
2. TAS5352 3 PIN: Shout down
TH
(Under 2.7V, Protection Circuit wills Active)
4-20
Pin No.
+8V
+5V
+3.3V
+5.6V
-2
PVDD (about 35V)
-12V
+12V
<Table 4-1>
Protection Circuit Operation
Open Short
-
X
X

X X
X X
X X
 
X X
X

1
2
<Fig. 4-9>
Remark
Samsung Electronics