Sharp LC-45GD5U Service Manual page 50

LC-45GD5U
TROUBLE SHOOTING TABLE
No monitor video output when receiving digital broadcasting
Is video signal from the digital unit supplied to pin
7 of AV_UNIT connector (DA, P1105)?
YES
Are video signals supplied to each pin of IC1104
(AV_SW)?
<Composite video signal> Pin 8
<S signal> Pin 11 SY-SUB, Pin 16 SC-SUB
YES
Are video signals sent to each pin of IC1104
(AV_SW)?
<Composite video signal> Pin 6
<S signal> Pin 5 SY-SUB, Pin 3 SC-SUB
YES
Check each monitor output terminal and the
peripheral circuits.(Q1113-5, Q1203-4, Q1148)
NO
Check the digital unit.
NO
Check between P1105 and IC1104.
NO Are control signals supplied to pins 2, 7 and 12 of
IC1104 normal?
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