Table of Contents
Advertisement
Troubleshooting
●
No Power
Check that IIC
Bus signals
are correct.
Check that POWER FAIL
signals are correct.
L : Abnormality
POWER
BUFFER
FAIL
IC4849
PRESSURE SENSOR
PTH901
TEMP. SENSOR
IC1519
TEMP. SENSOR
IC5801
TEMP. SENSOR
R/C
RESET KEY
AC
INPUT
FUSE
MAINS
SW
Is fuse (F901) blown?
Fuse may be opened
when either LAMP indi-
cator or READY indica-
tor does not light.
Check the fuse.
For safety, replace it
with a new fuse of the
same type
Occasionally, CPU may mal-
function and need to be reset.
SERIAL PORT IN
IN
LINK A
OUT
IN
LINK B
OUT
AUDIO
CONTROL PORT
SERIAL PORT OUT
R/Pr
G/Y
B/Pb
H/HV
V
R
L
(MONO)
R/C JACK
USB
AUDIO
CONTROL PORT
DVI
R
L
(MONO)
AUDIO OUT
R
L
RESET
(MONO)
HAND OPERATED RESET
for CPU
SW3801
Check that POWER
ON/OFF signal is correct.
L : Abnormality
65
I/O EXPANDER
IC801
CPU
233
IIC
UNIT_SUB POWER
AC
SENSOR
ASS'Y
POWER
NOISE
FILTER
PRIMARY CIRCUIT
AC INPUT VOLTAGE is over 108V?
AC SENSOR is provided to prevent dam-
age to the power supply circuits.
When AC input voltage is under 108V at
MAINS SW ON, the AC SENOR will be
operated and CPU does not turn the pro-
jector on, and READY indicator flashes.
Check that the AC sensor signal is correct.
L : Abnormality
Power sw
ON
Power on/off
Fan on/off
PFC on/off
Ballast on/off
400~600ms(Stability period of PFC.)
Are the LAMP indica-
tor (red) and READY
indicator (green) light?
If the LAMP and READY
indicators are not light,
check the primary circuit
and
S5V
of
power supply circuit.
Check that Vcc volt-
ages are correct.
IC1801
BLAST_SW1/2/3/4
BLAST_ERR1/2/3/4
BUFFER
LAMP1/2/3/4
POWER
FAIL
DC-DC
CONVERTER
FAN
CONTROL
FAN
CONTROL
PF_PFC1/2/3/4
SWITCHING
POWER
SUPPLY
Check that PFC cir-
cuit on/off signals
are correct.
Power sw
Timing chart
OFF
Cooling time after power off.
- 58 -
Is the lamp cover attached cor-
rectly?
When the lamp cover is removed
or attached not correctly, the pro-
jector cannot be turned on.
Check the lamp cover and the
standby
lamp cover switch (SW902).
SW902--open: Abnormality
INDICATORS
12VA
LAMP COVER SW
FAN
SW903/904/905/906
THERMAL SW
PF_
FANS
12V
FAN
PF_TH
P.F.C.
BALLAST
1/2/3/4
1/2/3/4
LAMP_1/2/3/4
Check that the Lamp
ballast on/off signals
are correct.
Check that the Lamp
error signals are cor-
rect.
Check the tempera-
ture switches.
NOTE :
The AC sensor does
not exist in some
particular models,
SW902
Check 12V
for PFC.
Advertisement
Table of Contents
