Sharp 37GQ-20S - Troubleshooting Tables; No Picture Troubleshooting

23
37GQ-20S
37GQ-21S
TROUBLESHOOTING TABLES.
NO PICTURE
NO
Check Q1001,
IC1001, IC1003
Check the tuner supply
and band biases. Both
must be approx. 5V DC
Normal
YES
Is tuning voltage
normal at
Pin (2) of Tuner?
Check Picture
setting by R/C. Signal
should be received.
-Check the AGC Voltage:
Pin (1) of Tuner.
-Check the SAW Filter: SF201