Hitachi CP-SX1350 P5SX+, Service Manual

Page: 14 / 78

14
CP-SX1350(P5SX+)
Lamp does not light
What is the state of
LAMP indicator DK52
during operation?
Power unit (ballast)
Lamp
PWB assembly Drive
Power unit (ballast)
Light
Light
PWB assembly Drive
YES
Not light
NO
YES
Change the lamp.
Does lamp light?
Power unit (circuit)
Not light
NO
Not light
Blinks
PWB assembly Drive
FAN
"L" = 0V
(L = less
than 1.5V)
L (0V)
PANEL B : E801
PANEL G : E802
PANEL R : E803
EXHAUST : E804
INTAKE : E809
LAMP : E808
Is the
voltage at collector
of Q801 on the PWB assembly
Drive fixed to "L" during
warming-up?
"L" = 0V
DC FAN
Measure the voltage
at each pin
Set AC to ON and
enter standby status
The voltage is
H (3.3V)
H (3.3V)
H (3.3V)
Measure
sure voltage at
TP-FS and/or TP-FS2 on
the PWB assembly
Drive.
Turn on the
power supply and check
the voltage
Check the fan connector
connection
Connector connection
Normal
OK
NG
Is the voltage
at pin of E805 on
the PWB assembly Drive
set to "L" during
warming-up?
3
1
1
1
1
1
1
The voltage
once
(about 1 sec.)
to L (0V)
DC fan malfunction
OK
H
H
NG
AC ON Power ON
about 1 sec.
What is the
state of TEMP indicator
(DK 53 on the KEYPAD
board)?