Hitachi CP-X940E, Service Manual

Page: 18 / 51

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Picture is not displayed
(both RGB and VIDEO input)
PWB ass'y signal
NO
YES
Are
voltage input
at pins , , , , ,
of EDS1 on the
PWB ass'y
drive?
PWB ass'y input terminal RGB
+6.6V
+16.5V
+5V
+5V
+5V
+5V
~ R signal
~ G signal
~ B signal
H sync (RGB)
V sync (RGB)
Power unit (circuit)
LCD module ass'y
Are the
signal output at
each pin of E701, E801
and E901 on the PWB
ass'y drive?
PWB ass'y drive
NO
YES See page 18
Are signal
input at each pin
on the PWB ass'y
drive?
NO
YES
PWB ass'y drive
: PSIG
: GND
~ : VSIG
: 15.5V
: HST
, : HCLK
, : GND
: ENB
: VCK
: VST
: PCG
: 15.5V
: COM
IS02 : V sync
IS02 : H sync
I510
120
~
124
,
126
,
128
,
132
: R signal data
I510
133
~
140
: G signal data
I510 ~ ,
110
,
111
: B signal data
PWB ass'y DIGITAL
Are signal
input at these
pins of EDI1 on the
PWB ass'y
drive?
NO
YES
PWB ass'y drive
PWB ass'y input terminal RGB
Check at operating mode with RGB1 or 2 input
10
10
12
12 14
14
21
22
12
14
4
4
6
8
2
1
1
2
3
3
4
7 9
6 8
94
14
15
17
18
20 21
19
23
24
25
29
30
31
99