Measures To Be Taken When The Protection Circuit Operates - Samsung HT-Z210 Service Manual

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 (+34.5V, J3) is higher or lower than Standards.
Normal Condition Voltage Range: PVDD (+34.5V, J3): about +34.5V
2. Over-current occurs to AMP IC. (Over-output or Output short)
3. AMP IC's temperature exceeds 150°C.
4. No supply voltage on GATE DRIVER.
Part
Location
CN3
Z210/Z310
SMPS
CN02
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)
Samsung Electronics
Pin No.
+8V (15)
+5V (7, 12, 13)
+5.6V (5)
PVDD (about 34.5V) (7, 9)
-12V (3)
+12V (1)
<Table 4-1>
Protection Circuit Operation
Open Short
-
X
X

X X
X X
X X
 
1
2
<Fig. 4-14>
Troubleshooting
Remark
4-25