[TechAssist] Re: Sony TV KV24FV10, no start- just chirping [UPDATE]
- From: Jim Myers <jr.myers@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 25 Jun 2004 14:40:55 -0500
Sure sounds like a bad flyback Gary. the 4 blink code is no vertical and
that is what you should get with the HOT collector disconnected. I think
5 blinks in IK failure. The number printed on the flyback is the bare
part with no wires installed. The 1-453-306-11 would be the one to use.
Wow $100.00 CN that's like 20 cents US?
*******************************************************************************************************************
Since 1972
Jim Myers
Telrad Electronics
Fort Wayne, Indiana
Gary McCartney wrote:
> Thanks for all the help on this.
>
> I tried to fire it up in service mode. A couple of times the sound came
> on but no HV. At that point, there was 135V dc on the HOT collector but
> no pulses. No pulse at the base either. Now I can't get the set to come
> on like that anymore, but if I remove the HOT collector from the
> circuit, the set comes on with sound for 2 seconds, then shuts off.
>
> As for LED blinking codes, they seem to be inconsistant:
>
> TV on:
>
> sometimes no blinks, sometimes 5 blinks, sometimes continuous blinking,
> sometimes 5 blinks, then a pause then continuous blinks. I'd say more
> often than any other, it is 5 blinks. The manual shows 5 blinks as being
> no video out, and either the screen is not adjusted right or IC301 is
> bad or IC541 vert out is bad. I went ahead and replaced the vert out IC
> but no diff.
> When HOT collector is disconnected and set turns off, I get 4 blinks.
>
> With everything connected and set is turned on, the waveform on the HOT
> collector is ringing. I removed the anode lead from the CRT in case that
> was loading it down but same symptom. I am suspecting the flyback even
> though my beloved HR tester shows it's ok.
>
> number on flyback = 8-598-850-00
>
> service manual shows 1-453-306-11
>
> my suppliers web site says to use 1-453-336-11. Price: $100.00 CDN
>
> Does anyone have a real cheap source for these Sony originals and which
> number do I go by?
>
>
>
>
> Gary McCartney
>
> McCartney Electronics
> Guelph Ontario Canada
> Est. 1984
> email: gary (at) number63.ca
>
>
>
> My original message:
>
>
>
> I have a Sony 24" KV24FV10 flat CRT set in the shop. The set doesn't
> start up. It just chirps continuously. On the odd occasion, the sound
> will come on for maybe 3 seconds then the power simply turns off. The
> waveforms on the HOT base and collctor are also pulsing but don't look
> proper. I get 39V dc on the HOT collector as it pulses.
>
> I have removed the flyback and tested it with my HR Diemen flyback
> tester and I get a perfect looking collector waveform with it. Tester
> shows flyback to be working fine (those not familiar, this tester
> actually connects the anode lead and drives the flyback just like the TV
> hor. output stage, although at a reduced test rate. I haven't had this
> tester fail me yet). I have also soldered the hor. driver transformer
> and other connections on main board and power supply board. Have checked
> for bad transistors diodes and resistors as well. I downloaded the
> manual and am looking it over now.
>
> Are there any common faults for these symptoms? I've read that the
> flyback is a possibility but with my test, I'm not sure what to make of
> that.
>
> Thanks for any help.
> --
>
>
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