-45-
No Power
Reset switch
The microprocessor inside the projector may occasionally
malfunction and does not accept any controls. In this case,
press the reset switch on the rear panel with a sharp tool
to restart the projector.
- When all of LEd indicators are not lighting,
the symptom indicates that the primary power supply circuit
does not operate properly. Check the power primary circuit and parts as follow;
AC cord
F601 (Fuse)
Power board
SW90 (Thermal sw.) .......short in normal
SW90 opens when the surrounding temperature of the switch exceeds 105°C.
This projector provides a function which can be specified a defective area simply by indicating the LEDs. Connect
the AC cord and press the Power button once and then check the LED indication.
- When the WARNING (red)
and PoWER(red) indicators are flashing,
the symptom indicates that the pro-
jector detected an abnormal temperature risen inside the projector. Check the air filters and remove the object
near the intake and exhaust fan openings, and wait until the POWER indicator stops flashing, and then try to
turn on the projector.
The internal temperature is monitored by sensor ICs, IC8801, IC881 and IC8831 on the Main board.
- When the WARNING indicator lights red
, the symptom indicates that the projector detected an abnormality
in the cooling fan operation or in the power supply secondary circuits. Check fan operation and power supply
lines, and the driving signal status.
The P_FAIL signal (Error: L) is sent to pin 38 of IC301<SYSTEM CONTROL> when the abnormality occurred inside the
projector, and then the IC301 sends the shut down signals, DC_ON and LAMPDC_ON, to the power supply circuit to stop
its operation, and signal BALAST_AC to the lamp ballast board via IC4891 and SW901<lamp cover switch> to stop opera-
tion of the lamp circuit.
An abnormality occurs on the secondary power supply;
Check power supplies 15.5V, S15.5V, S6V, S-5V. P_FAIL signal becomes “Low” when the abnormality occurs on any of
the power supply lines.
An abnormality occurs on the fan control circuit;
Check FN901, FN90, FN903, FN904, FN905, FN906 and peripheral circuit.
If any of the fans has an error, the fan lock signal drives Q3601 becomes on. As the result, signal FAN_ERR becomes
Low and is sent to lamp ballast board to stop lamp circuit.
An abnormality occurs on the drive signals;
DC_ON signal (Power-on: H) is output from pin 7 of IC301 and supplied to power supply circuit.
LAMPDC_ON signal (Power-on: H) is output from pin 73 of IC301 and supplied to the P.F Control IC, IC61, on the
power supply board through Q651, and PC643.
BLAST_AC signal (Power-on: H) is output from pin 81 of IC301 and applied to pin of IC4891 and output pin 4 and then
supplied to the lamp ballast board through the Lamp Cover switch(SW901).
CHO_RXD signal at the pin 140 of IC301 is applied from the lamp ballast unit. If the abnormality occurred on the lamp
ballast unit, CHO_RXD signal becomes “High” and then IC301 shuts down the power supply circuit.
troubleshooting
Lamp Cover switch
Make sure that the lamp cover is mounted correctly. If not
or the lamp cover removed, the lamp does not light on for
the safety. Check the lamp cover and lamp cover switch
(SW901).
Summary of Contents for PLC-XL40
Page 53: ... 53 BA7078 Sync Separator IC5301 IC Block Diagrams BA9743 DDC Control IC5651 ...
Page 54: ... 54 IC Block Diagrams L3E6100D D A S H LCD Driver IC501 IC531 IC561 FA5502 P F Control IC621 ...
Page 55: ... 55 IC Block Diagrams L3E07072 LCD Driver Gamma Correction IC401 M62399 D A IC3531 ...
Page 56: ... 56 IC Block Diagrams STR Z2156A Power Switching IC631 NJW1141 Audio Control IC5001 ...
Page 57: ... 57 uPD64012 Video Decoder IC101 IC Block Diagrams ...
Page 81: ...KY6 XL4000 81 Mechanical Parts List ...
Page 82: ... KY6A Oct 2006 DC 350 Printed in Japan SANYO Electric Co Ltd ...
