Sanyo PLV-WF10 Service Manual page 22

System Control
Are you thinking about turning
on the projector without the
lamp cover?
Remember that the interlock
Is the fuse (F901) blown? switch is opened during disas-
The fuse may be opened sembling the cabinet. The projec-
when either the LAMP indica- tor can't be turned on. (Some of
tor or the READY indicator the service personnel forget it
isn't Illuminated. Check the often.) When you turn on the pro-
fuse. For continued safety, jector without cabinet, press and
hold the lever of the interlock
replace it with a new fuse of
the same type. switch.
Hot circuit
FUSE
F901
AC-INPUT
Check that the
POWER FAIL sig-
nals are correct.
L : Abnormality
Are the LAMP
indicator(red) and READY
indicator(green) light?
If the LAMP and READY
indicators are not illuminat-
ed, check the primary cir-
cuit and S5V of standby
power supply circuit.
INDICATORS
* NO POWER -1
Is the Interlock switch
opened?
When the lamp cover isn't
attached correctly or the boss
inside the lamp cover is bro-
ken, the projector can't be
turned on. Check the boss
and the Interlock switch
(SW902). Refer to figure on
page 4.
INTERLOCK SW
SW902
FANS
FANS
Check that the Fan
on/off signal is cor-
rect.
L : Abnormality
LAMP
REPLACE
WARNING
TEMP.
READY
LAMP
-22-
Troubleshooting
Refer to page 24.
ASS'Y POWER
DC out
16V /9V /6.25V /-6V
POWER
CONTROL
FAN
ON/OFF CONTROL
I / O
EXPANDER
SUB POWER
Check that the IIC
Bus signals for fan
control are correct.
Power sw Power sw
ON OFF
Power on/off
Fan on/off
PFC on/off
Ballast on/off
Cooling time after power off.
400~600ms(Stability period of PFC.)
AC
Always
DC out
SWITCH
Switched
Check that the
Vcc-voltages are
correct.
Check that the POWER
ON/OFF signal is correct.
L : Abnormality
CPU IC801
and
I / O
EXPANDER
IC1831
Timing chart