Samsung Electronics
4-7
Troubleshooting
4-2 Measures to be taken when the Protection Circuit operates
4-2-1 Operation of Power Block Protection Circuit
Protection Circuit operates when power problem occurs in the SMPS.
SMPS
Part
Location
Pin No.
Protection Circuit Operation
Remark
Open
Short
CN3
+8V (1)
X
X
+5V (3,4)
X
X
+5.6V (11)
X
X
CN2
PVDD (about 11V) (1~2)
X
X
-12V (7)
X
X
+12V (9)
X
X
<Table 4-1>
4-2-2 Power Protection
The Power Protection Circuit operates in the following cases.
1. When over-current is generated in the amplifier IC (over-output or short-circuits in the output block.)
2. When the temperature of the amplifier IC exceeds 160°C.
3. When no power is supplied to the Gate Driver.
Summary of Contents for MM-DA25
Page 34: ...Samsung Electronics 6 3 PCB Diagram 6 2 MIC PCB Top 1 2 MCON11 UJ2 ...
Page 36: ...Samsung Electronics 6 5 PCB Diagram 6 3 MIC PCB Bottom MCON11 UJ2 ...
Page 37: ...6 6 Samsung Electronics PCB Diagram 1 2 6 4 FRONT PCB Top MCW1 VFD1 UJ11 ...
Page 39: ...6 8 Samsung Electronics PCB Diagram 6 5 FRONT PCB Bottom MCW1 VFD1 UJ11 UIC2 HIC2 MIC1 ...
Page 43: ...6 12 Samsung Electronics PCB Diagram 6 7 1 Test Point Wave Form TP1 TP2 ...
Page 46: ...Samsung Electronics 6 15 PCB Diagram 6 9 MPEG PCB Bottom MIC1 BIC4 DIC3 VIC1 IC4 IC3 IC2 ...
Page 47: ...6 16 Samsung Electronics PCB Diagram 1 6 10 SMPS PCB Top CON3 IC1 ...
Page 49: ...6 18 Samsung Electronics PCB Diagram 6 11 SMPS PCB Bottom CON3 ...