Samsung Electronics
6-3
6-3 No disc error
More than 0.4V (2V generally)
0V
More than
0.3V
0V
Yes
No
Yes
Yes
Yes
Yes
No
No
Yes
No
No
No
NO DISC ERROR
Check for
signal at Pin 98 of SIC6
(during playing) : more
than 0.4V
Check for
signal at Pin 100 of SIC6
(during playing) : more
than 0.3V
Check for
voltage Pin 53 of SIC6
: from 5V to 0V
Replace MIC 1
Check if
pick-up goes up and
down when PLAY button
is pressed
Check if
pick-up emits
LASER beam
Replace SIC 6
See FOCUS
does not play
Check for
voltage at Pin 6
of SCW 1 : -5V
Check for change of voltage
at Pin 8 of SCW 1
when PLAY button is
pressed : 1.2V
2V
Replace pick-up
Replace SQI
5V
0V
100
4DSUM
53
FL
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 ...