[TechAssist] Re: [Fwd: Zenith SRV1304S 13" TVCR dead, one chirp only,shorted D624]

  • From: John Mielke <maintv@xxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Thu, 21 Feb 2002 10:44:12 -0800


Yes, that's a zener to ground from thew B+.  It is QD4Z0001Z150 or Magnavox
4835-130-37786 which crosses to a NTE5100A.  The B+ there should be +112
volts.  It may have been a power surge but if the cause is inside the set
I'd suspect caaps in the primary circuit or on that 112v line.  That same B+
line is the feedback sample source for the regulator.  Also suspect ALL the
solder connections, especially where the cables attatch to go to the
deflection board.  Hope that helps, John.

Phil Bader wrote:

> -------- Original Message --------
> Subject: Zenith SRV1304S 13" TVCR dead, one chirp only,shorted D624
> Date: Thu, 21 Feb 2002 12:00:00 -0500
> From: Phil Bader <philbad@xxxxxxxxxx>
> Organization: Jan Phyl TV Inc. Winter Haven, Fl.  Est.1976.voice / fax
> 863-299-8821
>
> This has the seperate power supply and HV panel. On the PS I found a
> shorted diode D624 (EXR51 00 on part). Diode seems to be across the +120
> source to ground.that goes to the HV. First,is this an avalanch diode
> that shorts to shut down the set due to a high regulated output? What is
> the part? Finally, any other parts usually associated with this diode? (
> I am told this is same as a TVCR13E1 chassis) Thanks.
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