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

Glad I was able to help. After 30 years in this business I was forced to stop 
for medical reasons. I have felt useless for 4 years now but, when I can help I 
feel alive again. Keep them coming and if I am up to it I will answer all I 
can.James Daly
> From: TeleramaTV@xxxxxxxxxxx> To: techassist@xxxxxxxxxxxxx> Subject: [TA-A] 
> Re: Pan AG-1960 Power Supply> Date: Fri, 8 Feb 2008 02:43:42 -0500> > 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/
_________________________________________________________________
Connect and share in new ways with Windows Live.
http://www.windowslive.com/share.html?ocid=TXT_TAGHM_Wave2_sharelife_012008
------------------------------------------------------------------------------
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: