Samsung Electronics
6-5
6-5 LD does not play
Yes
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
Yes
No
No
LD DOES NOT PLAY
Check for signal
at Pin 35 of
SIC6
Check for voltage
at Pin 31 of SIC6
: 2.5V
Check for signal
at Pin 23 of SIC6
: 2 ~ 3V
Check for signal
at Pin 27 of SIC6
: 1 ~ 2V
Check for signal
at Pin 32 of SIC6
: 2 ~ 3V
Check for signal
at Pin 46 of SIC6
DISC is
defective
Replace SIC6
Replace TIC2
Replace SIC6
Replace SIC6
Replace SIC6
Check for
frequency at Pin 45 of
SIC6 : 15.7KHz
Check for
frequency at Pin 42 of
SIC6 : 14.3MHz
Replace SIC6
Replace SIC6
Replace VIC2
5V
0V
15.7KHz
about 3V
2.5V
63.5µsec
5V
0V
63.5µsec
Troubleshooting
Summary of Contents for DV7720KV
Page 21: ...Samsung Electronics 5 2 5 1 Adjustment Point Location Alignment and Adjustment ...
Page 150: ...Samsung Electronics 8 1 8 Block Diagram ...
Page 151: ...Samsung Electronics 9 1 9 PCB Diagram 9 1 Front Top DV7720KV ...
Page 152: ...Samsung Electronics 9 2 PCB Diagram 9 2 Front Top DV4720KV ...
Page 153: ...Samsung Electronics 9 3 PCB Diagram 9 3 Video cd 9 4 1 Top view 9 4 2 Bottom view ...
Page 154: ...Samsung Electronics 9 4 PCB Diagram 9 3 Main ...
Page 155: ...Samsung Electronics 9 5 PCB Diagram ...
Page 156: ...Samsung Electronics 9 6 PCB Diagram 9 5 Power ...
Page 157: ...Samsung Electronics 9 7 PCB Diagram 9 6 Deck ...
Page 158: ...Samsung Electronics 9 8 PCB Diagram 9 7 Deck 9 8 Deck ...
Page 159: ...Samsung Electronics 10 1 10 Wiring Diagram Fig 10 1 Wiring Diagram DV7720KV DV4720V ...
Page 160: ...Samsung Electronics 10 2 Wiring Diagrams Fig 10 2 Wiring Diagram DV7700KV DV4700V ...
Page 161: ...Samsung Electronics 11 1 Schematic Diagrams 11 Schematic Diagram 11 1 Front ...
Page 162: ...Samsung Electronics 11 2 Schematic Diagrams 11 2 Main 1 4 Servo Section ...
Page 163: ...Samsung Electronics 11 3 Schematic Diagrams 11 3 Main 2 4 LD Video Section ...
Page 164: ...Samsung Electronics 11 4 Schematic Diagrams 11 4 Main 3 4 Audio Section ...
Page 165: ...Samsung Electronics 11 5 Schematic Diagrams 11 5 Main 4 4 Syscon Section ...
Page 166: ...Schematic Diagrams 11 Ð 6 Samsung Electronics 11 6 Video CD ...
Page 167: ...Samsung Electronics 11 7 Schematic Diagrams 11 8 Power DV 7620KV DV 7622KV ...