[TechAssist] Re: Zenith B27A112, 9-2109-02 , dead, chirps@ turn on only, other. FIX

  • From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Tue, 23 Nov 2004 12:34:18 -0500

Well, it was made in 1999, so about 5 yrs old. That's not too bad. If 
you mean all the seperate problems, I agree. The open 120K resistors on 
the CRT board are usually something that happens alone. The flyback as 
well. The jungle ICx2200 losing color, now thats storm/lightning 
related. I just can't figure how the fly got into the picture, unless 
she watched it with negative, black and white video until the fly shut 
it down... How did all these things happen at once!
Phil Bader

al m wrote:

>Man where did they find that in the cellar?
>Al Marquardt
>ampm@xxxxxxx
>Al Marquardt Electronic Repair
>206 W Main
>Girardville Pa. 17935
>----- Original Message ----- 
>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Monday, November 22, 2004 2:18 PM
>Subject: [TechAssist] Zenith B27A112, 9-2109-02 , dead, chirps@ turn on 
>only, other. FIX
>
>
>  
>
>>Originally dead. Heard the chirp of the smps at plug in. Had all the
>>normal  voltages in standby.
>>+135VDC on HOT collector.
>>Push power. hear the  high voltage surge, then nothing. Scoped the
>>collector of the HOT (used a suitable probe)and saw the usual waveform
>>at start up. I've learned from past experiences this is a bad flyback.
>>Cure: Replaced the fly #95-4372-01 (subs are 95-4601-01, 95-4617-01,
>>95-4617-03).
>>Now, unit powers up with good high voltage.
>>The picture was poor, a black and white negative picture with smear to
>>the right.
>>Cure: Replace all three 120K ohm 1/2 watt resistors on the CRT board.
>>Now have a good black and white picture.
>>But, no color. OSD had color.
>>Cure: replace ICX2200: TA1268N.
>>Whew.
>>All fixed.
>>Phil Bader
>>
>>-- 
>>
>>Philip Bader
>>Jan Phyl TV Inc. (estab. 1976)
>>3420 Recker Hwy. Winter Haven, Fl. 33880
>>Fax (863) 299-8821
>>email: tjanphyl@xxxxxxxxxxxxxxx
>>
>>
>>
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-- 

Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx



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