Hitachi CP-X430W, Service Manual, Page: 14 / 58

14
CP-X430W
Picture is not displayed when
the RGB signal is input
Are signal
input at each pin on the
PWB assembly
Drive?
PWB assembly Signal
IC (IS01)
EL4332CS
PWB assembly Drive
LCD panel
NO
YES
Check at operating mode
CH106 : R signal
CH102 : G signal
CH104 : B signal
CH112 : H sync
CH113 : V sync
Power unit
(circuit)
Change the
IS01 on the PWB
assembly Signal is it
repaired?
YES
NO
NO
YES
Are voltage input
at each pin on the PWB
assembly Drive?
: +16.5V
: +15V
: +4V
: +6V E800
E800
E800
E800
1
4
6
12
Power unit (circuit)
NO
YES
Are voltage
input at each pin on
the PWB assembly
Drive?
PWB assembly Drive LCD module assembly
Are signal
input at these
pins of EV01 on the
PWB assembly
Drive?
Measure
the voltage at pin
of I102 on the PWB
assembly
Drive.
NO
YES
0V
5V
PWB assembly Drive
PWB assembly Signal
Check at operating mode
CHV29 : VIDEO (Composite)
CHV28 : S-VIDEO (Y)
CHV27 : S-VIDEO (C)
CHV34 : Component (Y)
CHV35 : Component (Cb)
CHV36 : Component (Cr)
Picture is not displayed when the VIDEO,
S-VIDEO, Component Signal is input
3
: +16.5V
: +15V
: +4V
: +6V E800
E800
E800
E800
1
4
6
12