No Power - Eiki EIP-HDT30 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.
IC8872
PRESS_SENS
PRESS SENSOR
IC1381
IIC IIC
TEMP. SENSOR
<OPTICAL>
IC301
IC8821
SYSTEM
TEMP. SENSOR
CONTROL
<DMD>
IIC
IC8811
TEMP. SENSOR
<ROOM>
IC4401
FPGA
BALLAST_AC2
BALLAST_AC1
SS3.3V
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
TH901
P.FAIL
IC5201
FPGA
FAN_SW1
IC7801
DAC
FAN_SW2
Power-on: H
IC1801
Stand-by: L
I/O
DC_ON
EXPANDER
PFC_ON
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
PFC12V
IC2601 Lamp Mode Lamp1 Lamp2 Lamp1/2
PFC_ON1 H L
FA7729
PFC_ON2 L H
PFC_ON1
PFC_ON2
PFC_ON: H
POWER(DC)
K16A
K6B
PFC
Check that PFC circuit on/
off signals are correct.
-126-
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
THERMAL SW
SW904
H
H
THERMAL SW
SW903
LAMP COVER
SW
SW902
Check 12V
for PFC.
X1A X3A
BALLAST1
K16C
K16B
X1B X3B
BALLAST2
Check that the Lamp bal-
last on/off signals are
correct.
LAMP1
LP901
LAMP2
LP902