No Power - Sanyo PLC-HF10000L Service Manual

Troubleshooting

No Power

Are the LAMP indicator (red) and
POWER indicator (green) light?
If the LAMP and POWER indicators
are not light, check the primary
circuit and S6V of standby power
supply circuit.
Check that IIC
Bus signals are
correct.
IC4801/IC4811
I/O EXPANDER
POWER
IC886
PRESS SENSOR
IC301
IC8856 IIC
SCALER
TEMP.SENSOR
<PANEL>
IC8811
TEMP. SENSOR
<ROOM>
Check that
POWER ON/OFF
IC5201
FPGA
signal (PFC_ON)
is correct.
ON: H
Standby: L
Lamp Mode Lamp1 Lamp2 Lamp1/2
PFC_SW3
PFC_SW4
AC
F901
SW901
FUSE
MAINS
SWITCH
Is fuse (F901) blown?
Fuse may be opened
when either LAMP indi-
cator or POWER indicator
does not light. Check
the fuse.
For safety, replace it with
a new fuse of the same
type
Check that POWER FAIL sig-
nals are correct.
L : Abnormality
P.FAIL
P.FAIL
IC1801
I/O EXPANDER
IIC
POWER_ON_SW POWER_ON_SW
Power-on: H
Stand-by: L
Power-on: H
Stand-by: L
PFC_SW
PFC_SW3
PFC_SW4
H L H
L H H
K6A
LINE
FILTER
POWER(AC)
Check that Vcc voltages
are correct.
Check that FAN LOCK sig-
nals are correct.
L : Abnormality
Cooling
Fans
PF_FAN
FAN
CONTROL
POWER(DC)
PF_TH
K16A
K6C
PFC
Check that PFC circuit on/
off signals are correct.
- 153 -
-153-
Is the lamp cover attached correctly?
When the lamp cover is removed
or not attached correctly, the
projector cannot be turned on.
Check the lamp cover and the lamp
cover switch (SW902).
SW902--open: Abnormality
Check the temperature
switches.
Thermal switches will open at
around 80ºC.
FAN
PF_FAN
CONTROL
FANNET
S12V
12V
CN1B CN3B
BALLAST1
K16B
K16C
CN1C CN3C
BALLAST2
Check 12V
Check that the Lamp bal-
for PFC.
last on/off signals are
correct.
Cooling
Fans
THERMAL SW
SW904
THERMAL SW
SW903
LAMP COVER
SW
SW902
LAMP1
LAMP2