No Power - Sanyo PDG-DET100L 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 SS6V of standby power
supply circuit.
Check that IIC
Bus signals are
correct.
IC4781
PRESS_SENS
PRESS SENSER
IC1381
IIC IIC
TEMP. SENSER
<OPTICAL>
IC301
IC8821
SYSTEM
TEMP. SENSER
CONTROL
<DMD>
IIC
IC8811
TEMP. SENSER
<ROOM>
IC4401
FPGA
Check that POWER ON/OFF signal
(DC_ON) is correct.
ON: H, Standby: L
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
IC5201
FPGA
FAN_SW1
IC7801
DAC
FAN_SW2
Power-on: H
IC1801
Stand-by: L
I/O
DC_ON
EXPANDER
BALLAST_AC1
BALLAST_AC2
K6A
NOISE
FILTER
POWER(AC)
Check that Vcc voltages
are correct.
Check the temperature
switches.
Thermal switches will open at
around 80ºC.
FAN_ERR
FAN
FAN_DAC
CONTROL
Lamp Mode Lamp1 Lamp2 Lamp1/2
IC2601
PFC_ON1 H L
FA7729
PFC_ON2 L H
PFC_ON1
PFC_ON2
ST_SW: L
PFC_ON: H
POWER(DC)
CN6
K6B
PFC1-2
Check that PFC circuit on/
off signals are correct.
-17-
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
Cooling
Fans
PFC12V
THERMAL SW
SW904
H
H
THERMAL SW
SW903
LAMP COVER
SW
SW902
Check 12V
for PFC.
X3A
X1A
CN4
BALLAST1
CN3
X1B X3B
BALLAST2
Check that the Lamp bal-
last on/off signals are
correct.
LAMP1
LP901
LAMP2
LP902