[TechAssist] Re: Fw: JVC VCR HR-VP 653U (Same as 654) Dead- FURTHER

  • From: rogerfixit@xxxxxxxx
  • To: techassist@xxxxxxxxxxxxx
  • Date: Sun, 17 Nov 2002 23:32:56 -0500

Thanx -Did find one in primary, as indicated. Also checked any and all
ICP's. There are many indicated on ckt bd but only about 2 installed.
Roger G.
 
Mr. Fix-It     Harrisburg, PA 17110    WebSite- 
http://mrfixit.netfirms.com
rogerfixit@xxxxxxxx  (alternate - rogerfixit@xxxxxxxxxxxxx  )
FAX 801-705-3748 ; Tel: 717-763-7098 (shop) 717-652-1703(home)

On Sun, 17 Nov 2002 21:44:59 -0500 "Jeff Dougherty"
<support@xxxxxxxxxxxxxxxxxx> writes:
> 
> Roger,
> Check for a low ohm resistor open in the power supply.
> Jeff
> 
> FAX 717-564-4952
> Jeff Dougherty
> Intrepid Video & Electronics      Be careful of your thoughts.
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> VCR tips, electronics info & general interest.
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> 
> ----- Original Message ----- 
> From: <rogerfixit@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, November 17, 2002 6:31 PM
> Subject: [TechAssist] Fw: JVC VCR HR-VP 653U (Same as 654) Dead- 
> FURTHER
> 
> 
> 
> Got power supply working - found bad resistor in primary (Duh!)
> Unfortunately, still have no function; no display. All PS voltages 
> seem
> ok- do not have 3.5v on display ends. Do have VCC on front micro.
> Do I have to go thru main micro to see if Power-on switches, etc? 
> Already
> spent too long on this one.
> Any 'secrets'
> Roger G.
>  
> Mr. Fix-It     Harrisburg, PA 17110    WebSite- 
> http://mrfixit.netfirms.com
> rogerfixit@xxxxxxxx  (alternate - rogerfixit@xxxxxxxxxxxxx  )
> FAX 801-705-3748 ; Tel: 717-763-7098 (shop) 717-652-1703(home)
> 
> 
> 
> Subject: JVC VCR HR-VP 653U (Same as 654) Dead
> 
> JVC VCR HR-VP 653U (Same as 654) Dead- no power; no display
> Replaced Q1, Q2 and reg IC (5301?) with known good ones. Have 
> primary
> voltages but nothing in secondary. Q1 has 'collector' voltage 
> (actually
> it is MOSFET marked DGS and I don't remember which is the center 
> leg)-
> but no pulsing.
> Have been all over the components in the secondary - could not find
> shorted component. Have had a couple of this chassis with bad micros 
> but
> power was OK
> Anything specific to look for?
> Thanx
> Roger G.
> 
> Mr. Fix-It     Harrisburg, PA 17110    WebSite- 
> http://mrfixit.netfirms.com
> rogerfixit@xxxxxxxx  (alternate - rogerfixit@xxxxxxxxxxxxx  )
> FAX 801-705-3748 ; Tel: 717-763-7098 (shop) 717-652-1703(home)
> 
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Roger G.

Mr. Fix-It     Harrisburg, PA 17110    WebSite- 
http://mrfixit.netfirms.com
rogerfixit@xxxxxxxx  (alternate - rogerfixit@xxxxxxxxxxxxx  )
FAX 801-705-3748 ; Tel: 717-763-7098 (shop) 717-652-1703(home)

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