[TechAssist] Re: GE VCR VG2021 - ZD6 Shorting
- From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 26 Mar 2004 20:24:25 -0000
Thank for your reply John. Yes, the VCR does work for a minute,
sometimes longer. I believe the 33V zener I put in is breaking down
under load, someone told me it was a 33V zener, looking closer at the
part I see a marking "43", so it must be that simple - 43 volts. Board
assembly markings are: 69097-123-100, PWB markings are: 66029-0233-00.
What could/are the other problems now that ZD5 shorted?
David Lessard
Alexandria Electronics
Ontario, Canada
mr_fixit@xxxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of John at Main TV
Sent: Thursday, March 25, 2004 11:52 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: GE VCR VG2021 - ZD6 Shorting
Yes, ZD6 should be a 43v, half watt (UZP43B). It is on the Always 33v
line.
C17 is on the Always 19v line. If you power this supply out of the VCR,
you
should attatch 2 resistors, 100 ohms each, from pins 5 and 6 to ground
and
then power it with 25VAC. There is also an extension cable for the PS,
215566, part of kit 215564. If ZD5 shorted you may now have more
problems.
It should be a UZP18B, 18v, half watt. If it works fgor a minute, the
problem may just be the wrong zener voltage. Does the VCR work for that
minute? What is the number of the power supply board? This is a Samsung
made VCR. John.
John Mielke
Main TV
636 main St.
Longmont, Co
phone 303 776 6955
fax 303 776 0792
maintv2004@xxxxxxxxxxx
----- Original Message -----
From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, March 26, 2004 8:44 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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