Hitachi C3S3, Service Manual

Page: 18 / 69

1
7
Power unit (circuit) PWB assembly Signal
Speaker
Check at operating mode
No sound
NO
YES
PWB assembly Drive
Are the
signals input
at each pin of E101
on the PWB assembly
Drive?
(TP117) : MUTE (0V)
(TP104) : CLK-VOLUME Control
(TP115) : DATA-VOLUME Control
(TP118) : POWER-AUDIO (+3.3V) 56
17
54
57
At the time
of remote control
operation. Are the signals puls
at pins
13
of E101 (RMT) on
the PWB assembly
Drive ?
PWB assembly Input
YES
PWB assembly Drive
The check after PWB change
1. PC power supply OFF
2. Connection of cable
3. Projector starting
4. PC starting
*When not operating :
PC set up change of cable.
NO
Can not operate to Mouse
Are the
signals data at pins
52
of E101 (TP114:RD) on
the PWB assembly
Drive ?
PWB assembly Input
NO NO
PWB assembly Drive
The check after PWB change
1. PC power supply OFF
2. Connection of cable
3. Projector starting
4. PC starting
*When not operating :
PC set up change of cable.
YES
Are the
signals data at pins
19
of E101 (TP105:TD) on
the PWB assembly
Drive ?
Can not control to RS-232C