[TechAssist] JVC AV27950 dead solved
- From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 16 Jun 2005 10:43:14 -0400
This JVC had identical symptoms (low pulse and ringing on the collector) as
the Sony KV24FS100 I gave up on a few weeks ago, after buying a couple
hundred dollars in parts and wasting many hours. Sony tech said flyback was
bad but it had the same problem with the new one in it.
On the JVC I hooked it up to my test jig and it works fine but if I put the
HV lead back on the set CRT it kills it again. Apparently the CRT anode is
shorted and somehow charging the yoke because the yoke connector will arc to
the chassis if it gets close.
I tried testing the tube and it doesn't test and I can't see the filaments
glowing either.
Now I'm going to get out the Sony (customer didn't want it back) and check
the tube on it.
Russ Hoyt
Hoyt's TV
Exeter, NH
----- Original Message -----
From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, June 14, 2005 5:51 PM
Subject: [TechAssist] Re: JVC AV27950 dead
> Thanks Eric, I checked that and it's OK but when I turned the AC back on I
> noticed it drawing about enough current for a short while then dropping to
> zero. That led me to look at the H drive at the HOT and it was good for
> that
> short time. Checking the waveform at the collector showed only 350v and
> lousy looking ringing. Quitting time now, so tomorrow I'll pull the
> flyback
> to test it.
>
> Russ Hoyt
> Hoyt's TV
> Exeter, NH
>
>
> ----- Original Message -----
> From: "Eric Manuel" <tvman@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, June 14, 2005 4:17 PM
> Subject: [TechAssist] Re: JVC AV27950 dead
>
>
>> Russ try this cap in the power supply..Eric
>> cap C926, 1000mfd@35V.
>>
>>
>> Eric
>> E M Electronics
>> Deer Lake Nfld
>> Canada
>> tvman@xxxxxxxxxxxxxxx
>>
>> Hoyt's TV wrote:
>>> No relay click. Has raw B+ and 43vdc on relay driver.
>>>
>>> Russ Hoyt
>>> Hoyt's TV
>>> Exeter, NH
>>>
>>>
>>>
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