-70-
Troubleshooting
temperature monitor operation
The temperature monitor system is provided to prevents
damage of optical components inside a projector from
overheat. Two protection systems are provided. Each
system operation as follows :
the temperature monitor -1:
●
to control the air-flow of the cooling fans.
The CPU checks the temperature and atmospheric
pressure inside a projector. It checks a temperature
using temperature sensors IC169, IC1814, IC1816
and it checks an atmospheric pressure using pres-
sure sensor IC886. The CPU judges data from sen-
sors and controls the air flow of the cooling fans so
the temperature inside the projector is maintained to
normal temperature.
●
to shut down the projector urgently.
The CPU checks surrounding temperature of LCD
panel (IC1814), Lamp (IC1816) and intake air (IC169).
If each part temperature reaches abnormal tempera-
ture, the CPU will turn off the projector, and will blink
WARNING TEMP. indicator. Cooling fans operate until
temperature returns to normal. Indicator will stop blink,
if temperature returns to normal.
the temperature monitor -2 :
●
temperature check of lamp :
Thermal protector (SW90) is placed near the lamp.
Thermal protector will operate, if the surrounding tem-
perature reaches 115ºC. When the thermal protector
becomes open, it cuts off the AC line to shut down the
projector immediately.
The sensor's operation is as follows:
IC886 : Pressure sensor for FAN control
IC169 : Inside temperature monitor A (room)
IC1816 : Inside temperature monitor B (lamp)
IC1814 : Inside temperature monitor C (panel)
Temperature Abnormality
SW901
IC301
SYSTEM
CONTROL
&
SCAN
CONVERTER
<PW392>
IC5201
FPGA
<XC3S50A>
LAMP
LP900
AC
SW902
THERMAL
PROTECTOR
A902
POWER
A901
LAMP
BALLAST
Q1861
CHO_RXD
FILTER_DET
WINDS_SENS
Q331
CHO_TXD
PW_MASTER_SDI
PW_MASTER_SDO
PW_MASTER_SCK
LAMP_DC_ON
IC1853
INVERTER
IC1816
TEMP
SENSOR B
<LAMP>
IC886
PRESS
SENSOR
IC1692
TEMP
SENSOR A
<ROOM>
S901
WIND
SENSOR
IC1814
TEMP
SENSOR C
<PANEL>
IC9885
SUB-MICON
<LC87F2G>
IC7801
DAC
FAN
CONTROL
<M62393>
LAMP
COVER SW.
1
2
32
154
251
15
14
41
343
68
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
K8C
FILTER SW.
3
1
LAMP_SWIN
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
FAN LOCK
P.FAIL
COOLING
FANS
SW902 opens at 115ºC.
WARNING TEMP. indicator blinks
Содержание PLC-XM100
Страница 89: ... 89 74LVC14 Inverter IC5502 IC Block Diagrams AD8183 Analog SW IC2001 ...
Страница 91: ... 91 IC Block Diagrams BA7078 Sync Separator IC1011 CXA7009 S H IC501 IC531 IC561 ...
Страница 92: ... 92 IC Block Diagrams CXD3540 Digital Gamma Correction IC401 FA5502 P F Control IC601 ...
Страница 93: ... 93 IC Block Diagrams ISL98001 A D Converter IC2201 M62393 DAC IC7801 ...
Страница 94: ... 94 IC Block Diagrams NJM2671 Motor Controller IC5541 NJW1156 Audio Selector IC5001 ...
Страница 95: ... 95 IC Block Diagrams PIC18F67 PIC IC8801 PW392 Scaler IC301 ...
Страница 96: ... 96 IC Block Diagrams PW610 Keystone IC2301 STR A6079 Power switching IC603 ...
Страница 97: ... 97 IC Block Diagrams TE7783 I O Expander IC4801 STR Z2156 Power switching IC651 ...
Страница 98: ... 98 IC Block Diagrams THS7347 3 CH Analog SW IC5231 IC5271 TPA3123 Audio Output IC001 ...
Страница 105: ... 105 Parts Location Diagrams KA8 XM15000 KA8 XM150L00 KZ5 XM10000 KZ5 XM100L00 Mirror B assembly S07 S07 S07 L10 M11 ...
Страница 152: ... KA8AL Nov 2009 DC 200 Printed in Japan SANYO Electric Co Ltd ...