Read Sharp XG-NV7XE (serv.man3) Service Manual online
37
XG-NV7XE
XG-NV7XM
TROUBLE SHOOTING TABLE
(Continued)
Lamp fails to light-up
Yes
Yes
No
No
No
No
No
No
Yes
Yes
Turn on the power switch. Is
discharging sound heard from
the lamp?
discharging sound heard from
the lamp?
Are the cooling fans running?
Is 2.5V voltage applied between
pins (1) and (3) of DC connector?
pins (1) and (3) of DC connector?
Is color wheel turning?
Is there vertical sync signal
input at pin (47) of P8503?
input at pin (47) of P8503?
PC board in trouble.
Is specified voltage applied at
PA and PB connectors?
PA and PB connectors?
Reconnect the connectors to
their sockets.
their sockets.
Is DC 380V voltage applied
between pins (1) and (3) of PL
connector and DC 12V voltage
applied between pins (4) and
(5) of PL connector?
between pins (1) and (3) of PL
connector and DC 12V voltage
applied between pins (4) and
(5) of PL connector?
Yes
Ballast unit in trouble.
Yes
DMD output formatter in
trouble.
trouble.
Is DB connector or flexible
cable out of position or in poor
contact?
cable out of position or in poor
contact?
Reconnect the connector
tightly.
tightly.
Yes
No
DMD output formatter in
trouble.
trouble.
No
DMD output formatter in
trouble.
trouble.
No
Yes
Yes
No
Yes
Is power supplied on DMD
formatter?
P8503: pins (1), (3) and (5); 5V
formatter?
P8503: pins (1), (3) and (5); 5V
pins (7), (9) and (11); 12V
pins (13), (15), (17)
and (21); 3.3V
and (21); 3.3V
Check the power circuit.
Is the lamp out of socket?
Reconnect the
lamp into socket.
lamp into socket.
Replace the
lamp.
lamp.
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