[TechAssist] Re: Zenith SE2517P Chassis 9-707 No audio. Need schematic.
- From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 4 Mar 2006 09:54:02 -0500
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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