Sanyo PLC-WM4500, Service Manual

Page: 65 / 158

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Troubleshooting
SW901
IC301
SYSTEM
CONTROL
&
SCAN
CONVERTER
<PW392>
IC4801
I/O
EXPANDER
<TE7783>
LAMP
LP900
AC
SW902
THERMAL
PROTECTOR
A902
POWER
A901
LAMP
BALLAST
Q1861
CHO_RXD
FILTER_DET
CHO_TXD
PW_MASTER_SDI
PW_MASTER_SDO
PW_MASTER_SCK
LAMP_DC_ON
IC1853
INVERTER
IC1854
IC1816
TEMP
SENSOR B
<LAMP>
IC886
PRESS
SENSOR
IC1692
TEMP
SENSOR A
<ROOM>
IC1814
TEMP
SENSOR C
<PANEL>
IC9885
SUB-MICON
<LC87F2G>
IC7801
DAC
FAN
CONTROL
<M62393>
LAMP
COVER SW.
1 2
4
1
2
32
68
154
251
15
14
41
343
281
16
1
1
29
29
5 1 4
5 1 4
3
1
K8R
K6R
CJ1
CJ2
K6B
RL601
K6AA K6A
K8K
K8B
K8E
K8A
K8S
3 5
8
7
9
POWER-ON:H
Network Standby: H
Eco Standby: L
POWER-ON:H
Error: L
Error: L
MAIN
SW1891
FILTER SW.
3
1
LAMP_SWIN
PF_FAN
10
POWER_SW
LOW
POWER
SUPPLY
POWER
SUPPLY
SB_5V
S16V
S6V
S-6V
S3.3V
PRESS_SENS
PW_SDA0/SCL0 PW_SDA0/SCL0
F601
FUSE
PF_FAN
P.FAIL
COOLING
FANS
The LAMP indicator lights and LAMP REPLACE indicator is
flashing
If the LAMP_SWIN 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 (SW901).
SW901--open: Abnormality
- Check the signals LAMP_SWIN, CHO_TXD, CHO_RXD output from
IC9885.
The POWER and LAMP indicators do not light
If the POWER and LAMP indicators are not lighting, check the
Fuse (F601) and Thermal switch (SW902) in the primary circuit
and SB_5V of standby power supply circuit.
- Fuse opens when the primary circuit has a error.
- Thermal switch opens when surrounding temperature of lamp
reaches around 115ºC.
Check that IIC Bus
signals are correct.
No Power
Check that POWER FAIL sig-
nals are correct.
L : Abnormality
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
Check that the Power on/off signals are correct.
- POWER_SW H: Network Standby / L: Eco Standby
- LAMP_DC_ON H: Power-on