Sharp LC-26D43U Service Manual page 32

LC-26D43U
TROUBLESHOOTING TABLE
Is video signal sent to output terminal pin 13 of tuner
(TU1101)?
Yes
Is video signal fed to pin 7 of IC1103 (LEVEL ADJ)?
Yes
Is video signal fed to pin R26 of IC8101 (Broadcom) via L.P.F. composed of Q2204 and Q2208?
Yes
Are digital video (LVDS) signals sent from pins 37-42 and
45-48 of IC2602?
Are digital video (COMOS) signal sent from IC8101
(DVODATA 0-23,DVOCLKO,DVODE,DVOHSYNC,
DVOVSYNC)?
Yes
Check LCD_CONTROL PWB.
No video output during ANALOG broadcasting reception
No
No
No
No
(Continued)
Check or repiace the tuner's peripheral circuits.
Is control signal for level adjustment fed from pin 1 of
IC1104 to pin 6 of IC1103?
No
Check or replace IC1104 (CONTROL) and peripheral
circuits.
No
Check between IC1103 and IC3301.(Q2204,Q2208,etc.)
Check IC2602 and peripheral circuits.
Check IC8101 and peripheral circuits.
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