Lamp Fails To Light-Up - Sharp XG-V10WU Service Manual

XG-V10WU
AN-SD1U/S422U
TROUBLE SHOOTING TABLE
Is the lamp out of socket?
Yes
Replace the
Reconnect the
lamp.
lamp into socket.
Replace the ballast.

Lamp fails to light-up

Turn on the power switch. Is
Yes
discharging sound heard from
the lamp?
No
Is the ballast cooling fan
running?
Is DC 360V voltage applied
between PL1 and PL2
connector pins?
Is 3.5V or higher voltage
Yes
applied between pins (1), (2)
and (4) of ballast's D
connector?
Is power EA connector
disconnected?
Yes
Reconnect the
connector into socket.
(Continued)
No
No
Yes
Check the power circuit.
No
Yes
No
No
Check the
microcomputer circuit.
48