Service manual

26
XV-Z90U
DT-200
Lamp does not light up.
Yes
Yes
Is the cooling fan rotating?
Check the socket
Is the P1701 (22) pin H level?
No
Check the power circuit or the fan
circuit of the main circuit.
Yes
Is the color wheel rotating sound
heard?
No
Check around IC9101 circuit, motor
driver IC and IC9102, 9003.
No
Normal Abnormal
Is the lamp discharging sound
heard?
Yes
Yes
Is DC 340V voltage applied across
the ballast power?
Lamp failure to light up. Go to
"Formatter Unit Troubleshooting".
No
Check the control line P-SAVE.
Is the level converted at IC8001,
B5 output, RN4904?
No
Yes
Check the power circuit.
Yes
Check IC8001 and the
peripheral circuit.
No
Replace the color
wheel.
Check the
formatter PWB.
No
Replace the lamp.