-60-
No Power
-
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,
SW902 (Thermal sw.) short in normal
SW902 opens when the surrounding temperature of the switch exceeds 100°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 projector
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, IC8831(Lamp), IC8821 (Panel) on the Main board and
IC4831 (Out side) on the Temp. 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 215 of IC301<SCALER> when the abnormality occurs inside the
projector, and then the IC301 sends the shutdown signal, LAMP_DC_ON, to the power supply circuit to stop its
operation, and signal LAMP_DET to the lamp ballast board via IC4891 and SW901<Lamp Cover SW> to stop
operation of the lamp circuit.
An abnormality occurs on the secondary power supply;
Check power supplies S16V, S6V, 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, FN902, FN903, FN904, FN905, FN907 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;
ON_150V signal (Power-on: H) is output from pin 3 of IC1802,15V supply circuit.
ON_50V signal (Power-on: H) is output from pin 4 of IC1802.
5V is output from pin 5 of IC5061, ON_33V signal (Power-on: H) is output from pin 5 of IC1802 and
switches Q3582, 3.3V supply circuit.
LAMP_DC_ON signal (Power-on: H) is output from pin 89 of IC301 and supplied to the P.F Control IC,
IC631, on the power supply board through PC661.
LAMP_DET signal (Power-on: H) is output from pin 296 of IC301 and applied to pin 2 of IC4891 and output
pin 4 and then supplied to the lamp ballast board through SW901<Lamp Cover SW>.
CHO_RXD signal at pin 26 of IC301 is applied from the lamp ballast unit. If the abnormality occurred on
the lamp ballast unit, LAMP_DET/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).
SW901
Summary of Contents for PLC-XU116
Page 65: ... 65 IC Block Diagrams FA5550NG P F Control IC621 IC87F2G08A5AT6 UART IC9885 ...
Page 66: ... 66 IC Block Diagrams SP3232ECYP RS 232C Driver IC3801 MR4010 Power OSC IC631 ...
Page 68: ... 68 IC Block Diagrams PW190 Scaler IC301 ...
Page 104: ... KC8AC February 2010 DC 200 Printed in Japan SANYO Electric Co Ltd ...
