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PG-M20X
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 34V voltage applied across
the ballast power?
Yes
Is voltage higher than 3.5V applied
to pin (19) of P9002 on the
formatter PWB?
Yes
Check the ballast power.
No
Check the power circuit or the fan
circuit on the key/input PWB.
Check IC3101, the motor driver
No
circuit and their periphery.
Check the waveform of SC3101.
Normal
Replace the color
wheel.
Yes
Check the socket
No
Check the power circuit.
No
Check IC9101 and its periphery
on the formatter PWB.
28
Abnormal
Check the
formatter PWB.
No
Replace the lamp.
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