No Power - Panasonic PT-EX600U Service Manual

Troubleshooting

No power

The ON(G)/STANDBY(R) and LAMP indicators do not light
If the ON(G)/STANDBY(R) and LAMP indicators are not lighting,
check the Fuse (F601) and Thermal fuse (SW902) in the primary
circuit and SB_5V of standby power supply circuit.
- Fuse opens when the primary circuit has a error.
- Thermal fuse opens when surrounding temperature of lamp
reaches around 113ºC.
AC
Check that POWER FAIL sig-
nals are correct.
L : Abnormality
Error: L
P.FAIL
Error: L
FAN LOCK
COOLING
FANS
IC7801
DAC
FAN
CONTROL
<M62393>
LAMP indicator lights and other indicators blink
If the LAMP indicator is lighting and other indicators are blink-
ing, the projector detects an abnormal inside the projector.
Check following points;
- Check the secondary power supply. Error on the low power
voltage
- Check the fan operation. Error on the fan.
- Check the filter cartridge detecting switch (SW1891).
SW1891 open: Error
- Check the signal FILTER_DET supplied to IC301.
FILTER_DET Low: Error
F601
FUSE
POWER
32
154
IC301
PW_MASTER_SDI
SYSTEM
IC5201
251
CONTROL
PW_MASTER_SDO
FPGA
&
<XC3S50A>
41
SCAN
PW_MASTER_SCK
CONVERTER
<PW392>
354
CPU_G
343
68
PW_SDA0/SCL0
PW_SDA0/SCL0_S5V
The LAMP indicator lights red
If the LB_SW signal is not supplied to the Lamp Ballast, the projector
cannot be turned on. Check the follows;
- Check the lamp cover and the lamp cover switch .
lamp cover switch--open: Abnormality
- Check the signals LB_SW, CHO_TXD, CHO_RXD output from
IC9885.
SW902
THERMAL
FUSE
K6B
LOW
RL602
POWER
SB_5V
SUPPLY
POWER
SUPPLY
K6R
1
1
K8R
POWER-ON:H
LAMP_DC_ON
5
POWER_SW
11
LB_SW
9
IC9885
4
SCI_SW
SUB-CPU
10 22
<MB95F353EPFT>
VD
CON_G
7
19
CHO_TXD
20
CHO_RXD
Check that IIC Bus
signals are correct.
Check that the Power on/off signals are correct.
- POWER_SW H: Network Standby / L: Eco Standby/H:
Normal standby
- LAMP_DC_ON H: Power-on
-81-
K6A CN1
A901
LAMP
S16V
BALLAST
S6V
S-6V
CN2
29 5 1 4
29 5 1 4
K8K
Network Standby: H
Eco Standby: L
POWER-ON:H
1
1
IC3903
2
IC3902
2
IC1853
INVERTER
1 2
5 3
Q331
S3.3V
FILTER_DET
WINDS_SENS
IC1816
TEMP
SENSOR B
<LAMP>
MAIN
LAMP
LP900
LAMP
K8B
COVER SW.
1
4
3
SCI
1
3
K8E
FILTER SW.
SW1891
K8C
S901
WIND
SENSOR
K8G
IC1692
TEMP
SENSOR A
<ROOM>
K8S
IC1814
TEMP
SENSOR C
<PANEL>