Hitachi CP-SX5500W, Руководство по обслуживанию

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14
CP-SX5500W
Picture is not displayed only
when the RGB signal is input
Are signal
input at each pin of
EMS1 on the PWB
ass'y MAIN?
PWB ass'y SIGNAL
PWB ass'y MAIN
LCD panel
NO
YES
Check at operating mode
(R185) , : R signal
(R188) , : G signal
(R189) , : B signal
(R157) , : H sync
(R158) , : V sync
Power unit
(circuit)
NO
YES
Are
voltage input
at pins , , , , of
EPOW on the PWB
ass'y MAIN?
1 3 5 7 13
7 44
9 42
11 40
13
1
3
5
7
13
38
15 36
: +12.5V
: +16.5V
: +6.6V
: +4.3V
: -7.0V
Power unit (circuit)
NO
YES
PWB ass'y MAIN LCD module ass'y
Are signal
input at these
pins of EMS2 on the
PWB ass'y
MAIN?
NO
YES
PWB ass'y SIGNAL
Check at operating mode
(RY62) , R signal (video)
(RY82) , G signal (video)
(RYA2) , B signal (video)
(RYF4) , H sync (video)
(RYF1) , V sync (video)
29 30
33 34
37
25
21
38
26
22
Picture is not displayed only when the
VIDEO, S-VIDEO, Component Signal is input
Are
voltage input
at pins , , , , of
EPOW on the PWB
ass'y MAIN?
1 3 5 7 13
1
3
5
7
13
: +12.5V
: +16.5V
: +6.6V
: +4.3V
: -7.0V