[TechAssist] Re: GE VCR VG2021 - ZD6 Shorting
- From: greentron@xxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 26 Mar 2004 02:40:12 +0000
That supply can be run without a load attached. I dont install new zeners on
those until all the output voltages are right.
J Silverman
> David,
> I fail to understand why not do it right and use a 43v zener and go from
> there..
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
> ----- Original Message -----
> From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, March 26, 2004 12:34 PM
> Subject: [TechAssist] Re: GE VCR VG2021 - ZD6 Shorting
>
>
> Jeff,
>
> I replaced ZD6 with a 33V zener, could this cause the problem I'm
> experiencing, how voltage can this (33V) zener shunt to ground?
>
> David Lessard
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Intrepid Video
> Support
> Sent: Thursday, March 25, 2004 10:21 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: GE VCR VG2021 - ZD6 Shorting
>
> David,
> Check Q1, Q2 again.
> Then check the small signal diodes for a leaky one...you can measure
> them in circuit, when you find one,
> unsolder one leg to confirm.
> Also, ESR all the caps.
> That is a 43v also check ZD5 an 18v zener...
> The marking should be on these, if you look closely.
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
> ----- Original Message -----
> From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, March 26, 2004 10:44 AM
> Subject: [TechAssist] GE VCR VG2021 - ZD6 Shorting
>
>
> This VCR was in for service a few weeks ago, SMPS was dead, replaced the
> following:
>
> Q1 - C4418
> Q2 - ECG382
> D02 - IN4148
> C09 - 22uf/16v
>
> Then the display was blinking when powered up, found ZD6 leaky, replaced
> it with 33V/1W zener (I think this is supposed to be a 43V zener?),
> anyway, ZD6 blows within a minute of VCR being powered up. What could be
> causing this? What circuit(s) does this supply?
>
> Thanks in advance,
>
> David Lessard
> Alexandria Electronics
> Alexandria, Ontario, Canada
> mr_fixit@xxxxxxxxxxxx
>
>
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