Hitachi CP-X880 Service Manual page 14

Picture is not displayed when
the RGB signal is input
Check at operating mode
Are signal
input at each pin on the
PWB assembly
Drive?
TPX29 : R signal
YES
TPX26 : G signal
TPX23 : B signal
TPX20 : H sync
TPX19 : V sync
Are voltage input
at each pin on the PWB
assembly Drive?
E800
E800
YES
E800
E800
PWB assembly Drive
Picture is not displayed when the VIDEO,
S-VIDEO, Component Signal is input
Check at operating mode
Are voltage
input at each pin on
the PWB assembly
Drive?
YES
Are signal
input at these
pins of EV01 on the
PWB assembly
Drive?
YES
CHV29 : VIDEO (Composite)
CHV28 : S-VIDEO (Y)
CHV27 : S-VIDEO (C)
CHV34 : Component (Y)
CHV35 : Component (Cb)
CHV36 : Component (Cr)
PWB assembly Drive
CP-X880/CP-X885
Change the
NO IS01 on the PWB
assembly Signal is it
repaired?
PWB assembly Signal
NO
Power unit
(circuit)
: +16.5V
1
: +15V
4
: +4V
6
: +6V
12
LCD panel
NO
E800 : +16.5V
1
E800 : +15V
4
Power unit (circuit)
E800 : +4V
6
E800 : +6V
12
NO
LCD module assembly
14
YES
IC (IS01)
NO
EL4332CS
Measure
the voltage at pin
0V
3 of I104 on the PWB
assembly
Drive.
PWB assembly Drive
5V
PWB assembly Signal