[TechAssist] Re: Zenith SE2517P Chassis 9-707 No audio. Need schematic.

Gerry, in one of the tips they refer to CX3418 and call it a 470pf
in the other one they cal lit C3418 and call it the filter for the 18v rail

I don't believe the tips are written by Zenith tech writers. I think they 
are submitted by TV techs in the field.
I know a lot of TV techs whose spelling accuracy leaves a lot to be desired.
So I tend to think they are one and the same.

Tip also says they are not being biased properly through the diodes and 
claims that C3418 filter was leaky.
I would suspect leaky diodes, myself.

If you would like a schematic, I can scan the relevant parts and send them 
if I have it.

Russ Hoyt
Hoyt's TV
Exeter, NH


----- Original Message ----- 
From: "GERALD GANN" <alpha21century1234@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, March 03, 2006 4:10 PM
Subject: [TechAssist] Re: Zenith SE2517P Chassis 9-707 No audio. Need 
schematic.


>     Russ are you monitoring this if so can you till me where C3418 is. We 
> did what the tip said and the audio came back. We found CX3418 an 470uf @ 
> 50V. Changed that, no help. Why can’t we just leave those diodes 
> disconnected? Audio sounds OK. Thanks
>  Jerry
>  Alpha 21 Electronics
>  1840 State St.
>  Granite City, IL 62040
>  618-452-8620
>  alpha21century1234@xxxxxxxxxxxxx
>
> Hoyt's TV <hoytstv@xxxxxxxxxxx> wrote:  From Z-Tips
>
> bad 18v supply rail at pin 2 of IC 101 & 201 on 9-599, scope it for ripple
> lift biasing diodes at pin 2 of each IC, if audio comes back may have 
> leaky
> C3418 filter cap. on 9-520
>
>
> Russ Hoyt
> Hoyt's TV
> Exeter, NH
>
>
> ----- Original Message ----- 
> From: "GERALD GANN"
> To:
> Sent: Saturday, February 25, 2006 5:39 PM
> Subject: [TechAssist] Zenith SE2517P Chassis 9-707 No audio. Need 
> schematic.
>
>
>> Zenith SE2517P Chassis 9-707 No audio. Need schematic.
>> Would any one have this oldie in PDF by any chance? Caps checked good and
>> we are getting all the voltages we think we are supposed to get on the
>> Stereo DEC/Audio Amp 9-599.
>>
>>
>> Jerry
>> Alpha 21 Electronics
>> 1840 State St.
>> Granite City, IL 62040
>> 618-452-8620
>> alpha21century1234@xxxxxxxxxxxxx
>>
>>
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