Sharp XG-P25X - Page 36

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