Sharp XV-Z2000 Service Manual page 37

Checking the lamp light-up
Does each cooling fan
function?
YES
Is the rotating sound of the
color wheel heard?
YES
Is the discharging sound
heard?
NO
Is DC voltage of approx.
370V applied to both ends
of the ballast power supply?
YES
Go to "Checking the
peripheral circuits of the
formatter".
NO
Check the power supply circuit
or fan circuit on the main circuit.
Check Q9401 to Q9403,
NO
IC9401(motor driver IC)
and their peripheral circuits.
NORMAL
Replace the color wheel.
YES
Is the lamp tight in the
socket?
YES
Securely insert the
connectors.
NO
Is pin (2) of P1707 at the
"H" level?
NO
Check Q8002, Q8006 and
their peripheral circuits.
37
ABNORMAL
Go to "Checking the
peripheral circuits of
the formatter".
NO
Replace the lamp.
Go to "Checking the
YES
power unit".
XV-Z2000
DT-400