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III. Disabling the Lamp:
To troubleshoot the TV's power supply, or A/V circuitry, keep the TV on but sto
lamp from generating unnecessary heat and blinding light. This procedure will cause
the microprocessor into thinking that the ballast is working so that the TV remains
S
elect the desired input for testing from the OSD menu before you disable the lamp.
Proce
dure efer
(r
to
figur
1. Unplu th
g
e TV et. R
s
(upper left corner).
2. Unplug B2 and connect B2/pin 3 (blue wire) to ground (pin 2) of the plug. Do no
plug B2 back in or else
B2/pin 2, use the TV board shields because the ballast or the DLP engine shielding
ground is incomplete when parts are removed during serv
3
. Plug in the TV and turn on the power.
The TV w l remain
il
on
Side input board
acc
essed fro
m the
front (not rear).
e 4
7):
em
ove
th
e pe
rforated ballast shie
the lamp will start. If you use cold chassis ground instead of
but
the
lam w
p ill be ff.
o
Figure
47 - TV rear
50
ld
and
loc
icing.
view (bottom)
p the
on.
ate
con
nec
tor
B2
t
Connector
B2
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