Samsung DV7720KV Service Manual page 35

6-11 Tracking is not working normally
4V
6-11
• Focus is normal
• Tracking is not working normally
Check for signal
at pin E,F of SCW1
0V
Check for signal
at pin 1 of SIC2
Check for signal
at pin 91 of SIC6
Check for signal
at pin 8 of SIC6
Check for signal
at pin 8, 9 of SIC4
Check for pick-up,
connector
wire and SR67
Yes
Yes
Yes
Yes
Yes
Troubleshooting
0V
500mV
No
Check for connector
wire and pick-up
No
Check for SIC and
power source : ±5
No
Check for SEMI VR (SVR7)
and PCB pattern
No
Replace parts of EQ circuit
for phase compensation
response of tracking
No
Replace SIC4
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