[TechAssist] Re: GE VCR VG2021 - ZD6 Shorting
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, <techassist@xxxxxxxxxxxxx>
- Date: Thu, 25 Mar 2004 15:48:45 -0800
If that Zener is in the secondary of the PS,you probably have an
overvoltage condition.
IOW,the Primary is being driven wide open.
Check opto-isolator.
it seems I had an IC2 in the secondary causing this condition once
Peggs
At 07:44 AM 3/26/04, David Lessard wrote:
>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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