[TA-A] Re: Pan AG-1960 Power Supply

Look for a defective supply/take-up hub sensor, also mode switch, 
disassemble clean and lube switch or replace. Put a pre-recorded tape and 
check for counter advance. Had one with dirty a/c head, not video head, 
audio/control. Check timing marks on cam and associated gears for alignment.

Hey that VCR is number 3 (remotely) for me with that cap!
----- Original Message ----- 
From: "Dr. Mark" <meinn99@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, February 08, 2008 2:34 AM
Subject: [TA-A] Re: Pan AG-1960 Power Supply


> Hi James,
>
>  I appreciate the inputs from you, Jack, and Tony.  The AG-1960 was fixed 
> earlier today.
>
>  Yes, the STRD6004x regulator was bad. The coating on the board around its 
> solder joints had turned brown from the excess heat. The regulator had 
> overheated, and had one ohm between two of its pins. There was a perfectly 
> good diode (on the board) between those pins, so it made no sense that the 
> resistance should be 1 ohm in both directions because the diode had 
> nothing to do.
>
>  We probed all diodes and everything around the STRD. The only thing that 
> seemed funny was the main supply cap, 100 uF, 250 V. It, in fact, had very 
> high ESR.
>
>  Hence, changing the cap and the STRD brought the supply back to life. The 
> unit is working fine now.
>
>  Tony, from Telerama, stated that he had seen a couple of these supplies 
> loose the main B+ cap, and take out the STRD.
>
>  You were both correct. Pretty easy fix.
>
>  The VCRs seem to be coming out of the woodwork lately. Someone dropped 
> off a Fisher FVH-S6800 earlier with a mechanical problem. The tape drive 
> stops within a few sceonds of initiation of play, rec, FF or rewind. That 
> should be fun!
>
>  Thanks again,
>
>  Mark
> James Daly <surveysjd@xxxxxxxxxxx> wrote:
>  With the fuse blowing it tells me that that STRD is bad and check caps., 
> diodes. Also, check all resistors to make sure they are OK. I use to get 
> most of my parts for these from Parts from MCM or a few others. MCM used 
> to have complete supplies also and maybe a manual. I think they are a 
> Panasonic distributor, I know they carry many of their parts. Some of 
> these STRDs. are expensive so, make sure you have no shorts or open 
> components before turning on. Also, if this unit was power surged, there 
> is a good chance that one or both of larger supply caps. by main fuse are 
> bad. Wish I had this unit in front of me. It takes longer to write than to 
> fix.James Daly
>> Date: Wed, 6 Feb 2008 12:36:07 -0800> From: meinn99@xxxxxxxxx> Subject: 
>> [TA-A] Re: Pan AG-1960 Power Supply> To: techassist@xxxxxxxxxxxxx> > Hi 
>> James,> > Thanks for the note.> > The problem seems to be close to the 
>> input because the input fuse is popping. There is a 2nd fuse toward the 
>> output end of the supply, and that is not popping. The 2nd fuse is a 
>> smaller value. We didn't find any shorted caps, but we are going to 
>> replace several. Perhaps it is an ESR problem.> > The main filtering cap 
>> appears to be a 100 uF, 250 V electrolytic. There is a voltage regulator, 
>> STRD6004x, that looks sickly. The circuit card around its pins appears 
>> brown -- like it was overheated.> > I'll let you know what we change to 
>> bring it back to life.> > Mark> > > > > James Daly wrote:> Mark,> I just 
>> realized that this is a VCR. What is the problem? Most of these can be 
>> fixed by changing 6 to 9 capacitors. If I am correct you will have a 
>> either .47mf@50v or 4.7@50 and a 1mf@
> 50v and some 100mf@10v and 330mf@xxxx or 1000mf@xxxxx These cause all 
> kinds of problems. If it's dead tell me if you found any shorted parts and 
> which ones. James Daly> > > > Date: Tue, 5 Feb 2008 22:16:08 -0800> From: 
> meinn99@xxxxxxxxx> Subject: [TA-A] Re: Pan AG-1960 Power Supply> To: 
> techassist@xxxxxxxxxxxxx> > Hi James,> > Thanks for the tip.> > I tried 
> www.servicemanuals.net before. I tried their quick search with both 
> AG-1960 and AG1960 under service manual, and nothing comes up.> > I also 
> did some Yahoo and Google searches, but nothing yet. Perhaps someone else 
> has it.> > Mark> > > James Daly wrote:> For everyone that reads this write 
> this down. You can get most service manuals on paper in about a week or 
> instant download from www.servicemanuals.net . Or, you can go to a search 
> engine and type in the brand and model # and you will get all needed in 
> places to get manuals, parts and forums where you can possibly get a free 
> download of manual.James Daly> > Date: Tue, 5 F
> eb 2008 18:47:18 -0800> From: meinn99@xxxxxxxxx> Subject: [TA-A] Pan 
> AG-1960 Power Supply > To: techassist@xxxxxxxxxxxxx> > > Dear Forum 
> members,> > D> oes anyone have a schematic for the AG-1960 power supply? 
> We are trying to repair one for a customer, and the Pan people can not 
> supply the service manual for at least 4 weeks from the time of order, 
> ugh.> > The power supply part number is VEP01375G, but it is no longer 
> available from Pan.> > Thanks,> > Mark> > > > 
>  > ---------------------------------> Looking for last minute shopping 
> deals? Find them fast with Yahoo! Search.> 
>  > 
> ------------------------------------------------------------------------------>
>  
> Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove 
> as subject.> Set Vacation 
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation> Lost 
> Password: http://www.tech-assist.org and select "Login Problems?".> Email 
> Archives: http://www.freelists.org/archives/techassist/> 
> ______________________
> ___________________________________________> Climb to the top of the 
> charts! Play the word scramble challenge with star power.> 
> http://club.live.com/sta> 
> r_shuffle.aspx?icid=starshuffle_wlmailtextlink_jan> 
> ------------------------------------------------------------------------------>
>  
> Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove 
> as subject.> Set Vacation 
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation> Lost 
> Password: http://www.tech-assist.org and select "Login Problems?".> Email 
> Archives: http://www.freelists.org/archives/techassist/> > > 
>  > ---------------------------------> Looking for last minute shopping 
> deals? Find them fast with Yahoo! Search.> 
>  > 
> ------------------------------------------------------------------------------>
>  
> Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove 
> as subject.> Set Vacation 
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation> Lost 
> Password: http://www.tech-ass
> ist.org and select "Login Problems?".> Email Archives: 
> http://www.freelists.org/archives/techassist/> 
> _________________________________________________________________> Shed 
> those extra pounds with MSN and The Biggest Loser!> 
> http://biggestloser.msn.com/> 
> ------------------------------------------------------------------------------>
>  
> Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove 
> as subject.> Set Vacation 
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation> Lost 
> Password: http://www.tech-assist.org and select "Login Problems?".> Email 
> Archives: http://www.freelists.org/archives/techassist/> > > 
>  > ---------------------------------> Never miss a thing. Make Yahoo your 
> homepage.> 
>  > 
> ------------------------------------------------------------------------------>
>  
> Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove 
> as subject.> Set Vacation 
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation> Lost 
> Password
> : http://www.tech-assist.org and select "Login Problems?".> Email 
> Archives: http://www.freelists.org/archives/techassist/
> _________________________________________________________________
> Climb to the top of the charts! Play the word scramble challenge with star 
> power.
> http://club.live.com/star_shuffle.aspx?icid=starshuffle_wlmailtextlink_jan
> ------------------------------------------------------------------------------
> Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove 
> as subject.
> Set Vacation 
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> Lost Password: http://www.tech-assist.org and select "Login Problems?".
> Email Archives: http://www.freelists.org/archives/techassist/
>
>
>
> ---------------------------------
> Never miss a thing.   Make Yahoo your homepage.
>
> ------------------------------------------------------------------------------
> Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove 
> as subject.
> Set Vacation 
> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> Lost Password: http://www.tech-assist.org  and select "Login Problems?".
> Email Archives: http://www.freelists.org/archives/techassist/
> 

------------------------------------------------------------------------------
Remove: Send a blank email to techassist-request@xxxxxxxxxxxxx with remove as 
subject.
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org  and select "Login Problems?".
Email Archives: http://www.freelists.org/archives/techassist/

Other related posts: