Hitachi CP-SX5500W, Service Manual

Page: 12 / 64

12
CP-SX5500W
Power can not be turned on
Are
voltage input at
pins , , , , of
EPOW on the PWB ass'y
MAIN at standby
mode?
: +12.5V
: +16.5V
: +6.6V
: +4.3V
: -7.0V
Power unit (circuit)
Fuse
on Power unit (circuit)
NO
YES
Disconnect
TSW form Power unit
(circuit). And check
TSW short or
open?
PWB ass'y MAIN
Short
TSW
Open
What is the state of
TEMP indicator?
Not light
DC FAN
Blinks
What is the state of
LAMP indicator?
Not light
Blinks
1
1
3
5
7
13
3 5 7 13
Is the LAMP
connection?
OK
Set the LAMP again
H (More than 6V)
Measure
voltage at the of
EFN1 on the PWB ass'y
MAIN.
L (OV)
PWB ass'y SW
PWB ass'y MAIN
Is the LAMP COVER
set?
OK
Set the LAMP COVER
NG
NG
10