XV-Z21000 (serv.man3). Troubleshooting Table - Sharp Projector Service Manual (repair manual). Page 3

XV-Z20000/XV-Z21000/DT-5000

5 – 3

The power indicator does not light 
up?

YES

Check the power supply BU6V system 
and output voltage of IC2810 and IC2002. 
Check peripheral circuits of IC2005.

NO

When connecting to an AC outlet, the 
power indicator lights red for a 
moment and flashes red at 1-second 
intervals?

YES

Check the lamp door and lamp switch. Try 
to press the red button of bimetal SW.
 Check each output of power supply.

NO

The power indicator flashes red at 4-
second intervals?

NO

Go to “Check of lamp lighting”.

YES

Check the voltage of TL6503 on the 
PC board unit. 
Is it 3V or more?

NO

Check the output voltage of DCDC regula-
tor IC on the main unit and PC board unit.

YES

Is clock output to TL5015 on the PC 
board unit?

NO

Are X5001 (16.59 MHz) and X5002 
(32.768 MHz) oscillated? 
Or check peripheral circuits of IC5003.

YES

Is pulse output to TL5009 when con-
necting to an AC outlet?

NO

Check peripheral circuits of IC2005.

YES

Check peripheral circuits of IC5003, 
IC5101 and IC5104.

The lamp indicator lights blue and goes out in 
about 15 seconds. The power indicator flashes 
red at 1-second intervals.

YES

Check the 13 V power supply and the 
cooling fan drive circuit.

NO

The lamp flashes blue, but it lights solid red after 
about one minute.

YES

The lamp or the ballast unit is defective.

NO

The lamp lights up. After about 100 seconds, the 
TEMP warning indicator appears on the screen, 
and the unit enters the stand-by. (The power indi-
cator and temperature monitor indicator flash red.)

YES

If TEMP error occurs even at low ambient 
temperatures, check the TEMP1 and 
TEMP3 signal lines. Check the fan.

NO

Go to "The lamp is flashing blue continuously".