V2000 and VR2334 very last models schematics.

[whaka54]

Hello,

I'm looking for schematics for the very last VR2334 produced units. They are different from the early ones.

For example, they use a switching power supply and the main board is really different from the early ones. They also are a bit different on the mechanical/electronic side.

So the usual schematics you can easily find are somewhat useless for these.

If someone has it (or knows where to find it), a share would really be appreciated

Thanks.

[G6ONEDave]

Welcome to the forum.

You actually require 2 service manuals, one for the Philips VR2334 and one for the Philips VR2340. The VR2334 manual just shows the differences between the 2 models, all the mechanicals are in the VR2340 manual. Having said that it will take around 6 to 7 hours to scan, possibly longer due to the high page count. Sorry but I can't spare that amount of time at present, that might be different in a few weeks time though. PM me if you don't have any further luck, say after a week or two.

Dave

[Chris55000]

Can you give me all the data off the model number please, including any /** suffixes, and ant reference numbers off the switch–mode power supply (A ***)
please?

I'm gathering a collection into my Dropbox for you to download, and I might be able to locate what you require if I have all the suffix and reference numbers!

Chris Williams

[Chris55000]

PS!

This chap apparently has three VR2334 supplement documents available, but he says you have to contact him, so he might charge for them!

https://tsf-schoser-documetations.e-...ope-v2000.html

Chris Williams

[Chris55000]

PPS!

I think you could possibly require the VR2334/50/51/52 service manual but the only source I could find was "manuals–in–pdf" which isn't free!

(I'm looking for a source to help the OP but by the time I've tried a few different links and downloaded a few manuals to look in the 30 min editing has timed out so I have to post again!)

Chris Williams

[whaka54]

Dave, Chris, thank you

Chris, the reference is VR2334/19F and serial is : WD 01 449 15 1009273
On the PSU there's a sticker on the shield : ZNR 02 WD 449
And on the pcb itself : 3111 179 1555 2
I don't see any other numbers.

I already have the french service manual with the 3 addendum, you can find it easily.
But sadly, addendum don't cover the very last revisions manufactured in 1984.

[Chris55000]

I've looked through all the VR2340 and VR2334 manuals I can obtain from free downloads and I can't locate any dated later than about Nov. 1983 and all the ones I can find show linear supplies with a mains transformer, so you might have to go for a paid one, and even looking on eBay turns up virtually nothing I can point you in the direction of!

Do you actually have a fault in the switch mode PSU of this?

(Q for other Members please!)

Can anyone assist me with the OP's enigma by pointing me in the direction of mid–1980s Philips VCR model numbers known to have switch–mode PSUs?

Chris Williams

[G6ONEDave]

Having now gone through both of my service manuals for the VR2334/00 and VR2340/00, neither has a switch mode supply as such. These two manuals show a transformer with mains in and multi several secondaries. The secondaries connect to the rear pcb near to the row of 20mm fuses, this pcb has a heatsink with the various regulator devices mounted on it, that protrudes out of the rear cabinet. The mains transformer has around 20 connections to it.

I can only take it that if your machine has a switch mode psu it must have been very late production. Perhaps a later model number might share the same or similar switch mode supply arrangement.

Dave

[whaka54]

Thanks for the time you spent

Actually no, there's no fault with the PSU, but in case of something went wrong.
I got it very recently, but a sticker on the back show it was serviced in 97.
And i saw 2 replaced capacitors in the PSU, something tells me it was the reason
I plan to replace all capacitors in it anyway...

[G6ONEDave]

It would be interesting if you can post a photo showing the psu area on your set.

Capacitors can be a problem but don't go swapping them all, as there will be some that are perfectly OK. Best to check whether they are doing their job or not, rather than a blanket swap out session. It is also so easy to make mistakes when bulk changing parts, such as wrong value or reversal if the item is polarised. Please be careful in your actions, as you don't want weird faults that defy logic happening.

Dave

[whaka54]

It won't be the first 2334 i replace capacitors. I have some experience with them, and know there's capacitors, and capacitors
I'm ok to say than some electrolytics are probably fine.
But at least in video section, some goes really bad and make them produce a noisy (DTF frequencies visible pattern) and more blurry picture.

So they all need some capacitors replacement anyway.
And here a picture of the psu (i'll make more detailled pictures later)

[Maarten]

It's the letter F behind the execution suffix that makes the difference. The VR232x/VR233x with the letter F use the deck and many of the electronics that are used in the last generation VR2340/VR2840.

Very interesting to see a code number starting with 3111. That means that particular part was designed in France, even if the recorder was made in Austria (according to the serial number).

Also interesting to have the serial number of a model for the French market, I never seen those yet and I do collect the numbers to estimate the years and number of units produced.

Your example is indeed very late: week 49 of 1984, part of a series between 10000 and 20000 machines from this particular production line/batch (very rough estimate based on 1 serial number). Production mostly ended around that time, though I have spotted one or two examples of january 1985.

[whaka54]

Thanks for precisions
If you want more serial of French market, i can give you some others i have.

My "everyday" 2334 for digitizing : 376205 and stamped 349 (week 49 of 83 ?)
A 2324 : 240725 and stamp 1415.
another 2324 : WD 20 411 18 1002302

i have some others including the portable, but they have no sticker. they tend to fall...

[JonSnell]

Here is the service manual;
https://elektrotanya.com/philips_vr2...wnload.html#dl

[Chris55000]

There's at least fifteen pages missing from that manual – is that why you couldn't find the information you're looking for?

The manual has printed page numbers up to 109/110 but the pdf page number is 90, so there's twenty pages from that document that hasn't been scanned!

Chris Williams

[Chris55000]

Any help?

Chris Williams

[JonSnell]

Originally Posted by Chris55000

There's at least fifteen pages missing from that manual – is that why you couldn't find the information you're looking for?

The manual has printed page numbers up to 109/110 but the pdf page number is 90, so there's twenty pages from that document that hasn't been scanned!

Chris Williams

Don't shoot the messenger, only trying to help.

[Chris55000]

Don't shoot the messenger, only trying to help.

My apologies – it wasn't my intention to do that, but what's bothering me is that some of the missing information needed by the OP might have been in the numerous missing pages of the original paper document, which ideally we need to find a complete scan of, and so far I've not located one!

Chris Williams

[whaka54]

Originally Posted by Chris55000

Any help?

Chris Williams

that's definitely the same basis.
not exactly the same, i guess this schematics cover a revision of the PSU, but it's close.

thanks