Toshiba 57H94 TV trouble code

[uptimod]

Bumping this question back to the top.

The power light flashes green three times, separated by a long pause,
then repeats. Set will not power-up. I'm wondering if the repair
involves board replacement or just a component.
The user manual vaguely says the green LED blinks at 3 second
intervals because the CableCard fan has stopped. Mine blinks 3 times
at three second intervals, the set
never powers-up, and all that is running is the CableCard fan. I
disconnect the tach wire, the 12 volt power to the fan will cease.
Thus, it is sending tach pulses, and appears normal on a scope.
Three green flashes from the power light, in an
endless sequence that doesn't change when I disable the fan. Turning-
off the TV by the power button does nothing because the set never
turns-on.

 

[Franc Zabkar]

On Fri, 7 Aug 2009 16:44:34 -0700 (PDT), uptimod
<laffinaddit@yahoo.com> put finger to keyboard and composed:

Bumping this question back to the top.

The power light flashes green three times, separated by a long pause,
then repeats. Set will not power-up. I'm wondering if the repair
involves board replacement or just a component.
The user manual vaguely says the green LED blinks at 3 second
intervals because the CableCard fan has stopped. Mine blinks 3 times
at three second intervals, the set
never powers-up, and all that is running is the CableCard fan. I
disconnect the tach wire, the 12 volt power to the fan will cease.
Thus, it is sending tach pulses, and appears normal on a scope.
Three green flashes from the power light, in an
endless sequence that doesn't change when I disable the fan. Turning-
off the TV by the power button does nothing because the set never
turns-on.

This site appears to be offering a free service manual:
http://elektrotanya.podzone.net/toshiba_51h94_57h94_rev2.pdf/download.cgi

Free circuit diagram:
http://www.nodevice.com/manual/newmans/51_57H94_CDpdf/get15027.html
http://nodevice.in/manual/newmans/51_57H94_CDpdf/get15027.html

Service Manual (US$13):
http://www.tradebit.com/filedetail.php/3540413-toshiba-projection-tv-51h9457h94-service-manual-download
http://www.service-docs.com/store/T-Z%20Service%20Manuals.html

US$10:
http://www.electronicsrepair.net/television32.shtml

US$5.50:
http://www.asm-service-manual.com/Manual/Toshiba_57H94_57HDX82_57HX81_57HX83_57HX84_PDF.htm


- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.