-126-
Troubleshooting
AC
F901
FUSE
SW901
MAINS
SWITCH
NOISE
FILTER
K6B
POWER(AC)
K6A
LAMP1
LP901
Cooling
Fans
THERMAL SW
SW904
THERMAL SW
SW903
LAMP COVER
SW
SW902
PFC
BALLAST1
X1A
X3A
LAMP2
LP902
BALLAST2
X1B X3B
K16A
K16C
K16B
POWER(DC)
FAN
CONTROL
IC2601
FA7729
IC7801
DAC
IC1801
I/O
EXPANDER
IC4401
FPGA
IC5201
FPGA
IC1381
TEMP. SENSOR
<OPTICAL>
IC8872
PRESS SENSOR
TH901
IC8821
TEMP. SENSOR
<DMD>
IC8811
TEMP. SENSOR
<ROOM>
IC301
SYSTEM
CONTROL
12V
PFC1_SW
PFC2_SW
PFC_ON2
PFC_ON
S-6V
SS6V
S16V
S-6V
SS6V
S16V
PFC_ON
PFC_ON1
PFC12V
PF_POWER
DC_ON
PFC_ONSS3.3V
BALLAST_AC2
BALLAST_AC1
P.FAIL
FAN_DAC
FAN_SW1
FAN_SW2
IIC IIC
IIC
FAN_ERR
Lamp Mode Lamp1 Lamp2 Lamp1/2
PFC_ON1 H L H
PFC_ON2 L H H
PFC_ON: H
Power-on: H
Stand-by: L
PRESS_SENS
Check that PFC circuit on/
off signals are correct.
Check that the Lamp bal-
last on/off signals are
correct.
Check the temperature
switches.
Thermal switches will open at
around 80ºC.
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
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
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 Vcc voltages
are correct.
Check that IIC
Bus signals are
correct.
No Power
Check 12V
for PFC.
Check that POWER FAIL sig-
nals are correct.
L : Abnormality
Check that POWER ON/OFF signal
(DC_ON) is correct.
ON: H, Standby: L
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