Sharp LC-32D44U Service Manual page 42

LC-32D44U
No video at UHF/VHF broadcast signal reception
Is the specified TV signal selected on the input select menu screen?
Is video signal fed to AM19 of IC8001 via a buffer amplifier?
Check TU1101 and its peripheral circuits(SDA3/
SCL3, etc.).
Check the line between AM19 of IC8001 and pin
13 of TU1101 (Q510, etc.).
YES
Are digital video (LVDS) signals sent from pins B5~7, C5~7, D5~7, and E5~7 of IC8001?
Are digital video (RSDS) signals sent from IC5103 to SC5201 and
SC5202?
Check between (SC5201, SC5202) and LCD Panel.
NO
YES
YES
No video (4)
No video at digital broadcast signal reception
Are there the video signal outputs (IF_OUT_P/N) at the pins(19) and (20)
of tuner(TU1101)?
Check TU1101 and its peripheral circuits (SDA/
SCL3, etc.).
Check the line between (AM33, AM34) of IC8001
and (pin(19), pin(20)) of TU1101.
YES
Check the line between IC8001 and IC5103.
Check IC8001 and peripheral circuits.
NO Check the line between IC5103 and SC5201 and
SC5202.
Check IC5103 and peripheral circuits.
6 – 4
NO
NO