Question about Projection Televisions
Question! My picture and sound both went out at the same time on my Samsung HLN437W yesterday, plus I had the 3 blinking lights. I took out the lamp carrier and checked it out and put it back in and picture and sound came back on, but later did the same thing again. It has 16,437 hrs on the orig. bulb and before I order a new one Monday, is it just the bulb or is there more going on then the bulb. I not sure if the sound also goes out when the bulb does?
1. If the 3 LED indicators flicker from the time the set is
turned on, it means:
1) The CN106 connector on the DMD board is not inserted
2) The MDR cable that connects the DIGITAL board to the
DMD board is not connected properly.
3) If the lamp does not turn on even after turning it on three
times, by powering off/on 15 second intervals:
! The B+ 380V power is not supplied to the ballast
(The cable is not connected properly between the power
and the ballast.)
@ The cable connected to the CN110 terminal on the
DMD board and the CN2 terminal on the ballast is shortcircuited
or not connected.
# The lamp does not turn on because 5V has not been
supplied to blue pin #1 on the CN2 terminal of the
$ 5V is supplied to the CN2 terminal on the ballast but the
lamp does not turn on because the ballast has a failure.
(If the lamp is replaced and 5V is supplied normally to
the CN2 terminal, suspect a ballast failure if the lamp still
does not turn on.)
% The ballast is normal but the lamp doest not turn on.
(When 5V is supplied to CN2 and 385V to CN1, but the
lamp does not turn on, try replacing the lamp. If it turns
on, that means it was a lamp failure.)
4) The color wheel engaged to the engine does not operate,
or the connector which indicates the operation of the
color wheel is not connected properly, and therefore
does not allow the lamp to turn on. The cause can be
determined when the set still does not turn on after
attempting to turn it on three times.
5) Another digital board or the DMD board has a failure.
Conclusively, if the three LED indicators flicker, first
check the above five items, then check the various
connector connections, and then suspect a failure of the
lamp or the ballast.
Posted on Jun 27, 2009
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