Sharp 25j-s100 and the other day when we turned it on is had a grey screen with thin white horizontal lines on all inputs. Anyone have any ideas what it could be?

Thanks


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Several different circuit areas could cause the symptom you described.
Provide a little more troubleshooting information for a more specific
suggestion.

Could be a problem in the G1 or G2 voltage to the crt, loss of the
video output main b+, a short in the crt, a problem in the video output
stage, corrupted eeprom data for the crt alignments, and possibly a few
other more remote areas.

The only way to know exactly what it needs to be repaired is to have
the tv properly diagnosed by a qualified technician.

The most common cause of this problem is an open resistor. Could also be a
bad FBT, CRT, or a few dozen other things. Start by looking at the bias on
the CRT and the G2 voltage.

Leonard

"Bob" wrote in message
...
Sharp 25j-s100 and the other day when we turned it on is had a grey screen
with thin white horizontal lines on all inputs. Anyone have any ideas
what it could be?

Thanks


--------------= Posted using GrabIt =----------------
------= Binary Usenet downloading made easy =---------
-= Get GrabIt for free from http://www.shemes.com/ =-

Thanks for the info.

One thing I meant to add is the OSD works fine. Does this help narrow
it down? Also, does anyone know where to get schematics for this TV?

hi
am having similar problem with my AWA model w571 tv only I get a blue
screen with the white lines.
it's been looked at twice in the last week and still problem persists.
I've tried reading the repair warranty and there are references to
1 - trace features to picture tube and tube socket
2 - dislodging foreign material
3- heaters to cathode short circuit on blue gun
4 repair tube socket on **** circuit board
5 - replace heater dropping resistor & check of plater (??) circuit.

Anyone have any info on why problem persists?
it worked fine both times repairedat the workshop but when returned
after 4 days the first time problem returned and within and hour of it
being returned the second time.

john