Samsung HT-TZ315 - DVD-Audio Playback Features; Bonus Group Access and Page Navigation

Samsung Electronics 4-25
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 (+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.
Z210/Z310
SMPS
Part
Location
Pin No.
Protection Circuit Operation
Remark
Open Short
CN3
+8V (15)
X
-
+5V (7, 12, 13)
X

+5.6V (5)
X X
CN02
PVDD (about 34.5V) (7, 9)
X X
-12V (3)
X X
+12V (1)
 
<Table 4-1>
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
TH
PIN: Shout down
(Under 2.7V, Protection Circuit wills Active)
<Fig. 4-14>
1
2