[TechAssist] Re: RCA TX808C chassis Model F19421 shutdown
- From: Alvin Rose <ajroseca@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 04 May 2005 14:17:32 -0230
Hello Leroy
I check the diodes in the high voltage system and you were partly
correct ..it was a by448 diode but it was DL07 instead of DL04
but both sit side by side in the same circuit and are togeather on the
circuit
board near the SMPS and flyback..It cured the troubles and everything works
fine..I used an ecg-506 for replacement..1400volt 2amp diode and I replaced
both units. Thanks for the info ..your help is appreciated.
Alvin Rose
LeRoy Westlund wrote:
>Alvin,
>Check this one out:
>
>Symptom: Dead,...won't turn on,...hear a tic tic. H.O.T. (TL02) collector
>reads 80 volts.
>Solution: Replaced DL04 (BY448) part # 248797 (shorted).
>
>HTH,
>LLW
>
>LeRoy Westlund
>Westlund TV & Electronics
>97 North Main " I forgot,..to remember,..
>Centerfield, UT 84622-0087 to forget "
>Ph./Fax 435-528-3822
>mailto:LLW@xxxxxxxxxx
>
>-----Original Message-----
>From: Alvin Rose <ajroseca@xxxxxxxxxxxxxxx>
>To: techassist <techassist@xxxxxxxxxxxxxx>
>Date: Tuesday, May 03, 2005 6:24 AM
>Subject: [TechAssist] RCA TX808C chassis Model F19421 shutdown
>
>
>
>
>>We have an RCA TX808C chassis which shuts down when
>>turned on..There is a high pitch frequency sound before shutdown.
>>Switching and output transistors check ok as well as diodes etc in the
>>circuits
>>Any info or suggestions on this problem would be appreciated.
>>
>>Alvin Rose
>>Radio & Tv Centre
>>Marystown, NL
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