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jak84
Bronze Member
USA
95 Posts |
 Posted - 03/17/2006 : 14:10:08
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| Any info on when or why the 'Made in Japan' sticker on the label was used (and any particular pedals)? I just picked up a DS-1 with this but hadn't seen this label before except in the gallery. Also, I believe I read on one thread that the power supply socket is not very telling for vintage but just happened to notice that mine(soon to be)appears to have the socket that is attached to the board as opposed to the one in the label gallery (Type 4). Sorry for long post and thanks for any info. |
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jak84
Bronze Member
USA
95 Posts |
Posted - 03/19/2006 : 03:33:51
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Irrelevent at this point I guess. I received the pedal only to find that the bottom plate had been switched. There was a notch in the plate for the free standing power supply socket as well as the sticker next to the socket calling out for a PSA adaptor and the label noting a ACA adaptor. Also signs that the label had been peeled off at one time, though not sure why if the whole plate was being switched? (also one barely engaged cross threaded screw)
Oh well, you live and you learn. Just a bit bummed because this was the one pedal that I held out for the MIJ version. |
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phostenix
Gold Member
USA
754 Posts |
Posted - 03/19/2006 : 04:13:00
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Do you have the ability to take any closeup pix of the PCB so that we could take a look at the components? We might be able to narrow it down for you. We could also check the date codes on the transistors & IC's and make some guesses from there as well.
Grace and peace,
Steve
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jak84
Bronze Member
USA
95 Posts |
Posted - 03/19/2006 : 06:45:32
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I'll take some pics tomorrow. I had it open and unfortunately in my limited experience, was unable to see anything. I had my BF-2 Mij open yesterday and was somewhat beginning to make sense of how to date the pedals per the transistors and such, but there seemed to be no actual transistors in the Ds-1 so I'm kind of lost at the moment. |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 03/19/2006 : 11:55:16
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Even the last versions should have lots of transistors.
Also check the type of opamp used. THe MIJ DS-1s as well as the first few years of MIT produced DS-1s used the TA7136AP opamp while the last decade's production has used a M5223AL instead. |
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jak84
Bronze Member
USA
95 Posts |
Posted - 03/20/2006 : 14:59:14
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Forgive my ignorance on this. I can point out resistors and capacitors, but never learned much beyond that. The closest # I see that is similar to the ones that you mention is BA728N (527 188) on one of the larger components.
Working on the pics. |
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jak84
Bronze Member
USA
95 Posts |
Posted - 03/22/2006 : 20:06:19
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The transistors are all 5E, 5H, & 5I. Assuming the bottom plate was swapped out to hide the fact that this is MIT, I'm guessing this to be 1995 (or 2005)?
The IC #'s (BA728N 527 188)don't seem to correspond to either YYWW or YMW. Is it possible that it is YWW?(527=July '85 which would go along w/the transistor dates.
The PCB reads: CITIZEN 1HB ASS' 70562634
I'm guessing I got screwed and this is definitely MIT, but would just like to know for sure.
Thanks for any info. |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 03/22/2006 : 20:26:05
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Did the opamp say TA7136AP or M5223AL? It should use one of them.
Pedals from 85 will use the first type while pedals from 2005 will use the last type. They probably used the M5223 in 1995 too but I'm not completely sure. The opamp change took place around that time. |
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jak84
Bronze Member
USA
95 Posts |
Posted - 03/22/2006 : 20:44:41
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| To be honest with you I'm not sure what the opamp is, although I hadn't seen anything visible with any of those #'s. |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 03/22/2006 : 22:21:20
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The opamp is the biggest IC in the pedal and it's usually the easist component to read the label of.
Here's a DS-1 made around 1981
and here's a 2003 DS-1
The opamp is the biggest black thing in there.
There is lots of differences between these two PCBs and changes has probably been introduced gradually. The number printed on the PCB of yours indicates that it is more like the last version. |
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jak84
Bronze Member
USA
95 Posts |
Posted - 03/22/2006 : 22:55:01
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That's the IC I noted w/the #'s BA728N 527 188. The 2003 PCB looks identical to mine. It appears I was definitely screwed.
Thanks for all the help. |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 03/22/2006 : 23:43:49
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I did some searching and found that BA728N is indeed an opamp. Did the PCB bear any marks of recent soldering?
Are there a 3rd version of the DS-1 that uses these opamps? Anyone else got one of these? |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 03/22/2006 : 23:59:43
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Wait a minute...
Found this picture on bornagin.net. I guess this PCB is identical to yours, jak84. The number on the PCB matches perfectly while my 2003 pedal has 01 appended at the end of the number.
Looks like we have a 3rd type of DS-1 here. According to the transistor numbers it's probably from mid-late 1995 (serial number around xH6xxxx).
Thanks for your information, jak84. Your DS-1 might not have been the Made in Japan pedal you thought you bought but instead a type unknown to me at least. The DS-1 page needs to be updated and I got another pedal to track down  |
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stahlhart
Platinum Member
1318 Posts |
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jak84
Bronze Member
USA
95 Posts |
Posted - 03/23/2006 : 03:12:52
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Glad I could help.
Appreciate all the input guys.
[No new soldering;looks clean (PCB looks identical)] |
Edited by - jak84 on 03/23/2006 03:18:55 |
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GuitarStv
Copper Member
Canada
39 Posts |
Posted - 03/23/2006 : 03:40:10
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Does anyone else notice that serial numbers on all the new ones declare themselves to be "ass"?  |
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DS-1 MIJ Label
