[TechAssist] Re: GE 13TVR70 ( tv/vcr) dead ,supplies OK
- From: John at Main TV <maintv@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 07 Nov 2003 10:06:35 -0700
You don't give us much to go on. Do you have a service manual? This is
one power supply I would not want to work on without a schematic. The
first power supply puts out +118 on DP20 catode and the second PS puts
out +9v on DP44 catode, also +6.2,+9,+33,+17,-5. You can unplug
BP05/BL06 to isolate the power supply from the rest of the set. The
turn on from the micro comes on connector BV81 pin 6 thru several
transistors and finally provides +9v to IV01 pin 22 on the deflection
board. I have seen problems in that line. Also check bad connections,
esp. on the defl. bd. A shorted vertical output is common and causes
immediate shut down. John.
becyn wrote:
> Hello all,
> We have a 13tvr70 that does not respond to the power button as if the fuse is
> blown. However the stby smps are active.
>
> The customer states that this happened after a power surge. Maybe a sub-reg
> somewhere?????
>
> Jim McVey
> McVey Alltronix
> 327 Broadway
> Newburgh Ny 12550
> ph: 845 561 8383
> fx: 845 561 9017
> Consumer electronics &
> computer service.
> Factory authorized for
> over twenty brands.
>
>
>
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--
John Mielke
Main TV
Longmont,Co 80501
303 776 6955
303 776 0792 fax
maintv@xxxxxxxxxxx
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