[TechAssist] Re: GE VCR VG2021 - ZD6 Shorting
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 26 Mar 2004 00:53:30 -0500
David, if you don't have a 43V zener in stock, you can use a 33V and a
10V in series. Some claim this to be done only for testing and to
install the proper value on completion of the repair. The few times I've
zenered in series, I've just left the 2 in the circuit and never had a
callback.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
David Lessard wrote:
>
> 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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