Sharp XG-P25X Service Anleitung Seite 38

XG-P25X
TROUBLE SHOOTING TABLE
Checking RGB signal output circuit
Are there RGB input waveforms at
pins (1), (3) and (5) of IC4301?
Are there output waveforms at pins
(16), (18), (20) of IC4301?
Check SC4301,P4301 and their
peripheral circuits.
Go to"Checking the output PWB unit".
Checking the 480P, 720P signals.
Are there signal inputs at pins (8),
(10) and (12) of SC4301?
Are there output waveforms at pins
(16) (18) (20) of IC4301 (RGB signal)?
Check SC4301,P4301 and their
peripheral circuits.
Go to "Checking the output PWB
No
Yes
Check the IC3302 of input unit
and its peripheral circuits.
No
Yes
Check the IC4301 selector switch,
terminal voltage and peripheral
circuits.
No
Go to "Checking the signal unit
Yes
circuit". (signal unit-3/3)
No
Check the IC4301 selector switch
Yes
terminal voltage and peripheral circuits?
38
(Continued)