- 82 -
The cause of the NO POWER is separated into 5 items as listed below. Check with the table on previous page and
make a short list of failure. The below shows the error condition and detection parts/signals.
Error Condition, Detection parts and signals flow
Temperature failure
- IC8801 monitors temperature inside the projector and IC8841 moitors temperature arround the intake duct,
and IC8801, IC8841 send data (SCL/SDA) to pins 216 and 217 of IC801<CPU>.
- SW913 monitors temperature on the LCD panel and sends signal (TEMP_LCD) to IC801<CPU> through
IC4802<I/O EXPANDER> Error: H.
- SW914 detects abnormal temperature on the Shutter and sends signal (MS_THERMO) to pin 1 of IC9870
<NAND>. IC9870 drives Q9802 off when signal MS_THERMO becomes "High" and then the operation of
Ballast1/Ballast2 is stopped.
Lamp failure
- SW902 detects Lamp1 Cover opened and sends signal (LAMPCOVER) to pin 2 of IC9870. IC9870 drives
Q9802 off when signal LAMPCOVER becomes "High" and then the operation of Ballas1/2 is stopped.
- SW905 detects Lamp2 Cover opened and sends signal (LAMPCOVER) to pin 2 of IC9870. IC9870 drives
Q9802 off when signal LAMPCOVER becomes "High" and then the operation of Ballast1/2 is stopped.
Filter failure
- SS901 detects clogged on the filter (BLOW_SENS).
Shutter failure
- Shutter switches detects shutter control error, and sends signals (STR1_OP, STR1_CL, STR2_OP, STR2_
CL) to IC801 through IC4801<I/O EXPANDER>. If IC801 detects abnormal operation of the shutter, the
projector is set into the standby mode after cooling down the projector.
Shutter
Open Close High-Contrast
STR1_OP
Low
High
High
STR1_CL
High
Low
High
STR2_OP
Low
High
High
STR2_CL
High
Low
High
Power failure
- Failure detection diodes detect a power failure on the power supply circuit (detection signals see items
Power Supply and Failure Detection).
or
- Detects a fan lock on the cooling fan (detection signals see items Power Supply and Failure Detection).
If all of the LEDs are not lightning, either the safety protection circuit is operating for product safety or primary AC
power is not supplied to the POWER(AC) board.
Safety Protection Circuit
This projector provides the safety protection circuit for product safety as follows;
SW911 (Lamp1 Thermal switch) detects abnormal temperature on the Lamp1 (SHUTDOWN1)
SW912 (Lamp2 Thermal switch) detects abnormal temperature on the Lamp2 (SHUTDOWN1)
If one of the above switches detects abnormal, the switch will be opened, and the detection signal <SHUT-
DOWN1> becomes "High" to stop the operation of the primary power supply circuit.
Chassis Description & Troubleshooting
Summary of Contents for PLC-EF60A
Page 102: ... 102 IC Block Diagrams TC4052BFT Selector IC9005 TC90A69F PAL Y C Separator IC2101 ...
Page 103: ... 103 IC Block Diagrams TE7780 I O Expander IC4801 IC4802 MAS1390 G Sensor IC5711 ...
Page 104: ... 104 IC Block Diagrams ...
Page 153: ...KJ6 EF60A00 153 Mechanical Parts List L15 R G Optical Filter WV Optical Filter WV S05 S05 ...
Page 154: ...KJ6 EF60A00 154 Mechanical Parts List 1 2 0 5 L03 Integrator In Integrator In ...
Page 156: ...KJ6 EF60A00 156 Mechanical Parts List L09 Mirror R Mirror R S05 S05 ...
Page 157: ...KJ6 EF60A00 157 Mechanical Parts List 157 Relay lens Out L08 Relay Lens Out ...
Page 160: ... KJ6A Feb 2006 BB 400 Printed in Japan SANYO Electric Co Ltd ...
Page 184: ...Diagrams Drawings KJ6 EF60A00 ...
