Great video Colin I love these old philips N1502 vcrs I have several of them myself and the n1700 not all in working order though I get ideas on how to get them running from seeing you work on them you certainly know your stuff
Same here. The last time I ran them the mechanical transport mech was OK but the sync was out. I have a manual somewhere so I must have another go. Thanks for the video.
Found it amusing to see a recording of Doctor Who at 35:55 -- is it a genuine off-air from 1985? I remember using a borrowed N1x00 machine as a kid in 1984 to record Doctor Who off-air while away and the format was long in the tooth then so to see a surviving N1500 off-air from 1985 is quite fun.
These green and violet bars appears in some recordings but not in all in my Grundig SVR4004. I've checked chrominance bars oscillators and looks be right. I haven't found the cause. Service manual in German, is a handycap to understand what it says. Edit: Violet and green bars problem solved in my Grundig SVR4004. It was caused by a disajustment in R1811 that caused Chroma 562,5Khz signal from Head Amp were not enough sinal for to feature chrominance properly. So, in your N1502, I think the problem must be similar, Chroma signal from Head must be attenuates or have any problem. I'm almost sure that 562,5Khz level is low, bad adjusted or any electronic failure.
Using a scrap machine to fix a scrap machine! Lucky that you have so many spares, I have an N1500 that took many hours to get working properly, but I was lucky enough to pick up another machine complete with 27 tapes!
Yet more machines were involved in part 2 of this video! I have several N1500 machines without video heads, I'll probably never work on them so if you need more spares you can have them for a very reasonable figure. Couriers are not expensive. Let me know via my web site if you do. I do have an N1520 which is a super-rare, stereo model. I should have a go at fixing that one. www.oldtechnology.net/detailsn1520.html
Many thanks, I will certainly contact you if I require any parts that I do not have. I do have a couple of N1700 machines, but both require heads, I very much doubt I will be able to source any though!@@video99couk
@@markpirateuk As you will have seen on my Frantic Skantic video, heads are a problem with these too. th-cam.com/video/xoPuBXZ4_DM/w-d-xo.html Part 2 of the N1502 video will be released later today.
I used to have an N1702 that I kept running in the 1990s until I emigrated from the Netherlands to the USA (nice to see your Dutch tape by the way). It was always fun to work on. Everything is so accessible! I don't think I've ever seen a 1502 but I had a 1500 with broken heads that never worked. From the looks of it, the 1502 is much more similar to the 1702 than the 1500. I'm going to guess that the vertical line has something to do with either interference or with the PAL delay line. I'm by no means an expert (I'm more into digital electronics) but it would seem pretty obvious that it can't possibly be caused by the mechanics, the heads, the FM circuitry or the color mod/demod.
Brilliant video tutorial on the faults on the N1502s. Definitely a preferable model to the N1500. Illuminated my current knowledge of this model. Still more I want to know on these, plus how to put in the AV outputs, as opposed to just using the RF.. Thanks as always for your great videos. P.S: Saw the Colin Baker Dr Who tape, but was interested in the Top Of The Pops, do you still have any old Top Of The Pops 70s editions there..? Cheers, Paul
That machine was an utter basket case, so many bad parts.:-( I think you did amazingly well with it :-D The second you pressed play the typical phillips stripey ribbon appeared on the screen, i thought hmm the f.m demod and dropout detector works :-D I had a front loader vhs that had the nightmare video heads that were clamped to the shaft, (philips machine). it gave the same demod and dropout ribbon display as the n1500. I had a broken vhs too, i took the f.m demod board and turned it into a stand alone unit with r.f modulator, handy for checking the state of any f.m output. No colour as i didn't have that bit lol. Yes it was a bodge, but good fun lol.
Not one accurate enough to measure if the frequency was just a tiny bit out. Only the TDS3012. But a quick tweak was good enough to make sure that it wasn't the cause of the problem. The diagrams are not the best, either. I have now resolved the colour problems but other unrelated issues arose!
If you've already replaced all the belts, I would expect sticking levers underneath and on top of the deck. See my videos about a Toshiba mechanical VCR which had similar problems.
Hi many thanks i guess most of the decks are all the same despite re-badging and front panel button setups i have several different types i can look at thinking about it maybe it's the pinch roller i can swap one around good project i think i have got a rare animal all the very best many thanks for your email re itt 674 tape damage take care Rob
hi watch the video 100% funny thing i am working on a tascam 38 -34 reel to reel deck i am doing the same as you moving parts around the deck i had the same make you are working on it takes alot of time just to find what is bad dry solder can be a right pain as it stop parts working right the older reel to reel are better no IC'S in the transport logic i wait and see what you pull out of the hat next fix
I had a Tascam 52 tape deck but had to replace it when it suffered some breakdowns which (at the time) I didn't have enough room to work on. I do miss that lovely machine.
30:26 Spring and pieces of rope must be n1500 ;-)
40:09 Isn't that Ria Valk @ Toppop?
46:28 Krijn Torringa @ Toppop?
Leo, je bent vannacht weer dronken geweest😂
Great video Colin I love these old philips N1502 vcrs I have several of them myself and the n1700 not all in working order though I get ideas on how to get them running from seeing you work on them you certainly know your stuff
I hope this helps a bit, also see my Frantic Skantic video. Part 2 of the N1502 will go live later today. Did I fix it?....
Same here. The last time I ran them the mechanical transport mech was OK but the sync was out. I have a manual somewhere so I must have another go. Thanks for the video.
Found it amusing to see a recording of Doctor Who at 35:55 -- is it a genuine off-air from 1985? I remember using a borrowed N1x00 machine as a kid in 1984 to record Doctor Who off-air while away and the format was long in the tooth then so to see a surviving N1500 off-air from 1985 is quite fun.
Good catch w doctor who that’s the 6th doctor Colin baker and peri
Ainda não tenho este formato no meu museu.Aqui em Portugal deve ser mesmo raro! Só tenho 2 cassetes virgens BASF Chrome Tape ainda seladas. Top!
These green and violet bars appears in some recordings but not in all in my Grundig SVR4004. I've checked chrominance bars oscillators and looks be right. I haven't found the cause. Service manual in German, is a handycap to understand what it says.
Edit: Violet and green bars problem solved in my Grundig SVR4004. It was caused by a disajustment in R1811 that caused Chroma 562,5Khz signal from Head Amp were not enough sinal for to feature chrominance properly.
So, in your N1502, I think the problem must be similar, Chroma signal from Head must be attenuates or have any problem. I'm almost sure that 562,5Khz level is low, bad adjusted or any electronic failure.
Using a scrap machine to fix a scrap machine! Lucky that you have so many spares, I have an N1500 that took many hours to get working properly, but I was lucky enough to pick up another machine complete with 27 tapes!
Yet more machines were involved in part 2 of this video!
I have several N1500 machines without video heads, I'll probably never work on them so if you need more spares you can have them for a very reasonable figure. Couriers are not expensive. Let me know via my web site if you do.
I do have an N1520 which is a super-rare, stereo model. I should have a go at fixing that one. www.oldtechnology.net/detailsn1520.html
Many thanks, I will certainly contact you if I require any parts that I do not have.
I do have a couple of N1700 machines, but both require heads, I very much doubt I will be able to source any though!@@video99couk
@@markpirateuk As you will have seen on my Frantic Skantic video, heads are a problem with these too. th-cam.com/video/xoPuBXZ4_DM/w-d-xo.html
Part 2 of the N1502 video will be released later today.
I used to have an N1702 that I kept running in the 1990s until I emigrated from the Netherlands to the USA (nice to see your Dutch tape by the way). It was always fun to work on. Everything is so accessible! I don't think I've ever seen a 1502 but I had a 1500 with broken heads that never worked. From the looks of it, the 1502 is much more similar to the 1702 than the 1500.
I'm going to guess that the vertical line has something to do with either interference or with the PAL delay line. I'm by no means an expert (I'm more into digital electronics) but it would seem pretty obvious that it can't possibly be caused by the mechanics, the heads, the FM circuitry or the color mod/demod.
Yes the N1502 is closer to the N1700, but the N1501 is closer to the N1500.
Brilliant video tutorial on the faults on the N1502s. Definitely a preferable model to the N1500. Illuminated my current knowledge of this model. Still more I want to know on these, plus how to put in the AV outputs, as opposed to just using the RF.. Thanks as always for your great videos. P.S: Saw the Colin Baker Dr Who tape, but was interested in the Top Of The Pops, do you still have any old Top Of The Pops 70s editions there..? Cheers, Paul
I'm not sure what I did with that tape. It's probably still here somewhere.
That machine was an utter basket case, so many bad parts.:-(
I think you did amazingly well with it :-D
The second you pressed play the typical phillips stripey ribbon appeared on the screen, i thought hmm the f.m demod and dropout detector works :-D
I had a front loader vhs that had the nightmare video heads that were clamped to the shaft, (philips machine).
it gave the same demod and dropout ribbon display as the n1500.
I had a broken vhs too, i took the f.m demod board and turned it into a stand alone unit with r.f modulator, handy for checking the state of any f.m output.
No colour as i didn't have that bit lol.
Yes it was a bodge, but good fun lol.
I can tell you that I have fixed the colour fault. And then had other issues....
Good video you are the best part two i'm italian Sorry my bad english
Part 2 will be along in a few days, I've almost finished shooting it.
Don't you have a frequency counter?
Not one accurate enough to measure if the frequency was just a tiny bit out. Only the TDS3012. But a quick tweak was good enough to make sure that it wasn't the cause of the problem. The diagrams are not the best, either.
I have now resolved the colour problems but other unrelated issues arose!
were those systems ever existed for NTSC? does anybody know?
The VCR format never got beyond prototypes for NTSC even though some of the tapes were made in USA.
Wow!
I have a 1978 vcr thats has this problem photos.app.goo.gl/Caqn4gDYBSeR2mCK8 do you have any tips for fixing it?
If you've already replaced all the belts, I would expect sticking levers underneath and on top of the deck. See my videos about a Toshiba mechanical VCR which had similar problems.
Hmm the two doctors!
Hi many thanks i guess most of the decks are all the same despite re-badging and front panel button setups i have several different types i can look at thinking about it maybe it's the pinch roller i can swap one around good project i think i have got a rare animal all the very best many thanks for your email re itt 674 tape damage take care Rob
The colour noise in the picture looks like a bad RF out modulator.
could be a magnetized head
Find out in part 2!
techmoan drink xd
hi watch the video 100% funny thing i am working on a tascam 38 -34 reel to reel deck i am doing the same as you moving parts around the deck i had the same
make you are working on it takes alot of time just to find what is bad dry solder can be a right pain as it stop parts working right the older reel to reel
are better no IC'S in the transport logic i wait and see what you pull out of the hat next fix
I had a Tascam 52 tape deck but had to replace it when it suffered some breakdowns which (at the time) I didn't have enough room to work on. I do miss that lovely machine.