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M1JWR

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Everything posted by M1JWR

  1. M1JWR

    Test Jigs

    these work perfectly, now ive done more conclusive tests, i can give you all more definitive results, i'll leave the best one until last, had to put wires to the clips as the meter probes wouldent fit, then the wires to the probes secured with black tape, so here we go 930 s/n 602837, 0.9mw $11 - 19.7// 7mw $90 - 62.1 //play 1005hrs //rec 120hrs //iop read 51.8 / 55.8 (the drive that got the ex 920 laser, spindle motor and owh) 520 s/n 6613980, 0.9mw $11 - 17.4 // 7mw $95 - 56.1 //play 945hrs //rec 8hrs //iop read 53.5 / 54.1 930 s/n 604153, 0.9mw $11 - 20.1 // 7mw $92 - 59.5 //play 7hrs //rec 3hrs //iop read 58.5 / 58.4 920 s/n 5515468, 0.9mw $10 - 19.4 // 7mw $90 - 60.6 //play 431hrs //rec 7hrs //iop read 55.6 / 56.1 930 sn 602724, 0.9mw $11 - 18.2 // 7mw $90 - 54.5 // play 106hrs //rec 10hrs // iop read 55.1 / 54.3 theres the other 920, i'll do that one at another time, as for the 40/70 series, quite difficult finding the correct ribbon for the jig, i am still looking, its people like ngy with much more knowledge that help us, if not for people like him we would not be where we are, much appreciated, will get back on deck errors etc next
  2. M1JWR

    Test Jigs

    cracked it now, was on the wrong pins, 0.9mw one is 19.7 and 7mw one is 62.1
  3. M1JWR

    Test Jigs

    nah its the section below that, thats just a refrence pic from the net, its the 200m position two clicks below where that one is pointing
  4. M1JWR

    Test Jigs

    i'll have another shot at it, will let you know tomorrow, this will be on player 602837 the one with the old 520 laser inside, something funny going on, will see if i can suss something out, have a good night for now
  5. M1JWR

    Test Jigs

    i never thought you did, i am assumeing that of myself, being more mechanically minded in the mechanics world there is an old saying,"let it develop", ha ha dosent count for electronics world though as i am finding out
  6. M1JWR

    Test Jigs

    so because its working i am doing something wrong
  7. M1JWR

    Test Jigs

    would've been getting pretty close to the 15 second time when reading settled, bit strange those readings then, if thats the case, i dont understand why they are like they are, it could only mean that the 200mv setting dosent corrispond with this meter, strange they are all working players.
  8. M1JWR

    Test Jigs

    meter is uni-t ut58a set to where it says 200m just below where this one is actully pointing
  9. M1JWR

    Test Jigs

    i am taking it the higher the figure the healthier the laser, had a look at s/n 604153 its 7mw reading is 84.5, again started a bit lower than that and came up to settle at that figure, and as can be seen in a post above its very low milage !!! you can test your 530 now kevin, bit of a pain getting the connector in, its in a awkward spot, you have to remove drive and tilt it so as you can get it in then put it back in place, getting it out again is easy though.
  10. M1JWR

    Test Jigs

    I have done some checks, i used the 520 first, as above its done quite a few hours 945, it came out as follows, 200mw range ld pwr check, on menu 0.9mw $11 came up as 96.8 on meter and 7mw came to around 46.5, it started a little less than that and rose slowly to that figure and began to steady. this 930 is not on the above lists, s/n 602837, 0.9mw $11, 7mw $90, iop read is 51.8/ 55.8, 51.8 is what i put it at from when i had the 940's laser in to start with that diddent work out, total record 120hrs and play time is 1005hrs, dosent really pay relevence to the laser thats in it now i would think, possibly explains what was wrong with the original, not an expert on that. the 0.9mw setting came out at 103.2 and the 7mw came out at around 76.2, it started at 72'ish and rose to that and slowed at the 76 area, quite different to the 520's readings, i can check another 930 if needed for comparison
  11. M1JWR

    Test Jigs

    980 is also mdm 7 varient and it reads ok, must've changed it with the 80 series play/record
  12. M1JWR

    Test Jigs

    i will get back to you on that when i get the clips, never thought about the 7mw setting, however i can give you two as the other players are put away for the time being jb930 s/n 602724 is 7mw $90 jb980 iop read 54.6 / 53.5, ld read 0.93mw $11, record time 24hrs / play time 166hrs, 7.25mw $90 its just as these two are the ones i use, so accessable, however also apart from 940 did some lesser models yesterday, again not 7mw settings though, if i dont put the play/ record hours on its because they are 1hr each so must have either lost memory or been reset at some point. jb940 s/n 5503208 (not uk special) iop read 52.5 / 50.9, ld read 0.9mw $10 je 470 s/n 6606247 iop read 54.4 / 53.3 ld read 0.9mw $10 je 470 s/n 5516667 iop read 54.4 / 53.8 ld read 0.9mw $10 je 470 s/n 5502169 iop read 49.7/49.7 ld read 0.9mw $10 je 480 s/n 6682482 iop read 50.1 / 49.1, ld read 0.9mw $11 rec time 25mins/ play time 239hrs je440 s/n 6601065 iop read 50.5 / 50.9, ld read 0.9mw $11 that had the bd board swap je440 s/n 6602565 iop read 53.7 / 53.9 ld read 0.9mw $10 je520 s/n 6613980 iop read 53.5 / 54.1 ld read 0.9mw $11 rec time 8 hrs/ play time 945hrs i havent got any more..... honest !!!
  13. M1JWR

    Test Jigs

    i have now ordered the test clips and await their arrival, meanwhile i just looked through some of these decks service menu's to see what they say at the moment, and some examples are as follows.dosent include the 930 thats currently in the "box", all below have their own correct drive units apart from 5507017 which was taken from a 520 some time ago.dont know if it tells anybody anything, i just looked for reference jb930 serial number 604153, iop read 58.5 / 58.4, ld read 0.9mw $11, record time 3hrs, play time 7 hrs jb930 serial number 602724, iop read 55.1 / 54.3, ld read 0.9mw $11, record time 10hrs play time 106hrs jb920 serial number 5515468, iop read 55.6 / 56.1, ld read 0.9mw $10 record time 7hrs play time 431hrs jb920 serial number 5507107, iop read 53.3 / 51.3, ld read 0.9mw $11 record time 1hr play time 58 hrs
  14. M1JWR

    Test Jigs

    kevin, you will get a packet of pins for about 3 quid inc post, you will recieve 100 pins, the boards as its a pack of 5 ( i cut one in half) are about the same and the 6 pin connectors, again you will get 5 sets are again about 3 quid, all easily found on fleabay, as for the test hooks, now ive seen those before, dont remember if i got any with the meter originally, if not i now know where i can get them from, as for the pin outs, ive written them on a small piece of paper, red wire is rf etc and sellotaped it to the top side of the board, the black tape is for the live joints on the underside.
  15. M1JWR

    Test Jigs

    I have now made up a test jig, so far only for mdm 5's (pictured), the one for the 7's will probably take a little longer, i would have to probably construct it a little different to ngy's example, however it dosent seem very clear, to me anyway, how to set it up in the service manual, dont get me wrong its all there in great detail, as per the 930 thread and as i dont have a lpm all i am looking for is info on the actual iop on the robbed ex 520 laser and the health of the laser, so the future is bright, i dont really know what info that would appear on the multimeter and what to set it at, ive got a 520 down here just now to act as a test bed, its got the correct drive unit inside and is working as it should, i think it should be a different thread as it affects a variety of models. will have to have a ratch around as i only have standard multi meter probes.
  16. he's tried them on a variety of players with same result, cant be 470's fault then, here's one out of the box even though he hasent stated it, hi md discs maybe, otherwise as kevin says the symptom is like putting a mdlp disc in a 520 or similar, dont know what a mdlp player would do with a hi md encoded disc .
  17. nah ! i wouldent even try that, it wouldent be possible.
  18. yep, had a kawasaki z1000j motorcycle for years, one time the rear brake master cilinder went fubar(old age) good used ones were onobtainable, and new ones that were still available at that time the prices were unbelievable, so off to the breakers yard to find something similar, got one for a gpx750, fitted it and bled it etc and it worked spot on for the rest of the years i had the bike, it the case of the md drive, i suppose i fixed it "mechanically", but not yet electronically so to speak, wish i still had the z1000j they are worth lots now. its a case of not a lot to loose and everything to gain.
  19. thing is i am more mechanical minded than electronic minded. some things i understand and some i dont, so yes some parts of the sm is in chinese to me, ngy has cleared up a lot of things here for me, ive had nothing to do with installing minidisc lasers before, its all a learning curve to me, thought i did quite well actually getting it working, i was expecting it not to, i live in cumbria, us cumbrians will get the for example lawnmower off the side of the road that the guy has chucked out because it maybe has dirt in the fuel or something, sort it out and get 10 years out of it until its a wreck, at that time the cumbrian will look for another, the same or similar, make something out of the two and try for another 10 years, just the way we are, just as ngy says i have 2 not totally compatable units and got something working and it gives you the "good feeling", i realise its not over yet until i make up a jig, then hopefully we may have something a bit more concrete to go on.
  20. there is also this, i for fun checked the 930 with correct matched drive unit inside in service menu, c27 55.1/54.3 on iop read, and the actual iop value on that deck is 54.3, so with two figures there, would that mean a possible error of correction sort of thing and a figure between those two would be ok, plus in the mix drive 930 as we will call it, again there are two figures originally 56.4/55.8(currently set to 51.8 instead of 55.8 as that was the setting for the laser out of that 940 drive that i tried first), i think i am starting to get it now, will leave that one in the box until i build a test rig, will see how i get on through the week. thought kevin would have had a word or two by now, its deep stuff !!!
  21. thanks for the pics, never thought of making a test jig, ive seen it in the service manual i downloaded, mdm 5 looks easiest, might have something knocking about from an old scrapped board for the plug end, then a piece of veroboard and some contact pins, no doubt the mdm 7 one can be done with veroboard also, if not will have a look at somewhere like farnells or rs components, apparently the iop is written on a sticker on the laser on the mdm 5's, the sticker is there but no writing, drat !! I cant be far away or it probably wouldent work very well or at all, ive put that deck in a box just now, suppose getting it working is a good start, had a quick look at that 520 that i have thats complete from a while ago and its iop is 54.1, i realise that it dosent really tell me anything , just probably its unique for that perticular machine, i tend to stick with the simple mdm shot belt issues, but of course the odd one turns up with a bit extra, like the 440 with a bd board swap and the 940 that started it all for me when we stumbled on the ribbon cable partial cure for some faults, it also had a fault with one of the optical inputs as it was getting no power, an invisable hairline through a track was the fault, so i jumped it with a wire link, all good education.
  22. always liked the maxell md74 golds and the pro 80's, used to get them in asda back in the day, pukka gold coloured discs aswell, unlike the md rxg's that looked gold until you slide the door and find out they are ordinary silver discs, dont know if gold coloured vs silver makes any difference, probably not, if it does, shame on you tdk we were conned, sony premium/prisims come to mind aswell, however i have not had any problems with any of them and they are 20 years old, cant say that about a solitary sharp one i have, i have one jvc like in the pic above, its been ok aswell, still has its 20 year old recordings on it.
  23. Had a busy day so far, had removed the ex 940 laser, cant remember the history properly, think it was iffy to start with, only played certain discs, have now put the ex now i remember 920 laser in, its original drive had a broken chassis mount and a knackered owh, probably from transit, thats how i originally got it anyway, when i installed the 920's laser i also used its rack part and its sled pin, i also discovered that the ribbon for the 930's owh was cut through (not by me) so changed it for the ribbon off the 920's owh, that was a tricky job, the 930's spindle platter looked iffy, so also put the ex 920's spindle motor in, also as its mint and works, was tested via applying about 3.5 v to it, to cut out boring detil, have now reassembled and its working folks, havent tried record as yet but it definately plays, i dont have a iop value for this one though, the original iop on the 930 was 55.8 and on the ex 940 drive was 51.8, its set to that just now, i take it the higher the figure the more oomph it will give for recording so thats where adjustment will be needed, gradually up until it records, that if it dosent record already, if it does will leave well alone. cheers ngy for you assistance so far. parts for the bin ex930 laser, ex920 owh or whats left of it, ex 930 owh ribbon, dont know about the ex940 laser as its really unknown, did notice the switch boards are different the ex920 one is smaller than the 930 one. can now report that it does record and writes toc and plays again after toc is written, used optical in from pc
  24. was on about the 520 op only
  25. have done the exchange, result, player stuck in stand by, strike one, can only try the one out of the 520 now, if that fails, look for a donor box
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