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Lamp does not light up.
Yes
Is the cooling fan rotating?
Yes
Is the color wheel rotating sound
heard?
Yes
Is the lamp discharging sound
heard?
No
Is DC 340V voltage applied across
the ballast power?
Yes
Lamp failure to light up. Go to
"Formatter Unit Troubleshooting".
No
Check the power circuit or the fan
circuit of the main circuit.
No
Check around IC9101 circuit, motor
driver IC and IC9102, 9003.
Normal
Replace the color
wheel.
Yes
Check the socket
No
Is the P1701 (22) pin H level?
No
Check the control line P-SAVE.
Yes
Is the level converted at IC8001,
B5 output, RN4904?
23
Abnormal
Check the
formatter PWB.
No
Replace the lamp.
Yes
Check the power circuit.
No
Check IC8001 and the
peripheral circuit.
XV-Z90E
XV-Z91E
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