Hitachi CP-S335 Service Manual page 15

CP-S335(C9SM)/CP-X340(C9X)/CP-X345(C9XM)
Picture is not displayed only
when the RGB signal is input
Check at operating mode
Are
voltage input
at pins(1)(3)(5)(7) of
E800 on the PWB
assembly
MAIN?
YES
Are the
proper waveform
observed at the pins (4)
and (5) of the IS02?
YES
Are the
proper waveforms
observed at the pins
(10),(13) and (15) of
the IT02?
YES
PWB assembly MAIN
Picture is not displayed only when the
VIDEO, S-VIDEO, Component Signal is input
Check at operating mode
Are
voltage input at
pins(1)(3)(5)(7) of E800
on the PWB assembly
MAIN?
YES
PWB assembly MAIN
NO
Power unit
(circuit)
(1):+13.2V
(3):+17V
(5):+6.6V
(7):+4.1V
NO
IS02
EL83021U(IC)
NO
IT02 or IT03
SN74F157(IC)
LCD/LENS PRISM
assembly
NO
(1): +13.2V
(3): +17V Power unit (circuit)
(5): +6.6V
(7): +4.1V
LCD/LENS PRISM
assembly
15