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Old 30th October 2010, 07:09 AM   #1
FNQ is offline FNQ  Australia
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Default Where In Australia ?

Hi.
Restoring an early 80's Yamaha D85 Organ I need to get my hands on exact replacements for these:
1/ TC4016BP -Jaycar staff think a 4016 may do BUT I really need to ensure they are compatible with the originals which have the BP suffix..
2/ NJM4558 dual opamp,Jaycar staff say TLC555CP should do..
3/ TC4071BP,
and TA7531 Opamp.
I'm no expert in this, so I need to ask the experts on here for their divine guidance- I don't want to install incompatible "chips" and fry them or the instrument.
All advice will be so appreciated. Thanks guys.
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Old 30th October 2010, 10:57 PM   #2
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on the 4558, look at your board and see if you have the dual in line package (two rows of 4 pins) or single in line package (one line of pins). They don't interchange. I like the US version of distributor farnell.co.uk, but don't know how you access their southern hemisphere stock. Usually 555's are timers, not op amps, any company that has a private numbering scheme that uses this famous number for another famous number is really strange.
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Old 31st October 2010, 06:29 AM   #3
rabbitz is offline rabbitz  Australia
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The NJM4558 (D/LD/S.SIL suffix) is available from WES Components in Sydney.

WES Components

The other parts are not in their catalogue but doesn't hurt to ask.
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Old 31st October 2010, 07:39 AM   #4
amc184 is online now amc184  New Zealand
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I'd recommend Farnell to anyone in Australia or New Zealand. They don't have exact replacements for the things you want, but they do have these equivalents:

- HEF4016BP instead of TC4016BP (this is the Philips equivalent to the Toshiba part).
- MC4558 instead of NJM4558 (this is the ST Micro equivalent to the New Japan Radio part). This only applies if you're after the NJM4558D, the 8DIP package version. I don't know what the people you were talking with were thinking, but the TLC555 is a timer, not an opamp, and is not a replacement for an NJM4558.
- HEF4071BP instead of TC4071BP, again the Philips equivalent.

The TA7531 might be a bit harder to replace, I couldn't even find a datasheet for it. What package is it, and does it have a manufacturer's mark?
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Old 31st October 2010, 08:44 AM   #5
audi0 is offline audi0  Australia
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Hi,
Altronics have all but the TA7531, not much comes up when you Google that one, just some German guy looking for the same thing with not much success I think?
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Old 1st November 2010, 07:19 AM   #6
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Guys MANY thanks for your replies. I have checked Altronics but Farnell seems to be the best suited to my needs.
at member amc184, ...that original unit being the JRC4558DV, as you indicated Farnell can supply the 4558"D" ..would that be ok in place of the "DV" ? Would U let me know your thoughts??
BTW as there are hundreds of caps that I am replacing in this keyboard I was chuffed to see the gr8 prices of caps with Farnell..So thanks guys, especially to the Kiwi
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Old 1st November 2010, 09:52 PM   #7
amc184 is online now amc184  New Zealand
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The V in the JRC4558DV is a version suffix, it still uses an 8DIP package, and the replacement I suggested before still stands. Farnell is certainly the place to go for the capacitors as well. Stick to reputable brands when replacing the electrolytic capacitors, I'd suggest Nippon Chemicon or Panasonic.
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Old 1st November 2010, 10:55 PM   #8
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Default capacitors

You really need to look at your PCB and see if your 4558's are 8 pins in 1 row (sip), or two rows of 4 pins(dip). They don't interchange. Looking at the link on farnell site to datasheet well tell you what each suffix is. They didnt stock 4558 SIP in USA when I looked, I found them on mouser for a numark mixer. In caps, I am also getting good results from Vishay capacitors, both roderon made in europe, and sprague, mostly made in USA. Also in 1-10 uf size, aerovox ceramics made in mexico, direct replacement for former electrolytics in power supply bypass (but not for frequency filters). Any electrolytic cap you buy, look at the hours of design life on the farnell selector chart. Buy 2000 hours up electrolytic caps, they have better rubber seals etc.
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Old 2nd November 2010, 10:44 AM   #9
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amc184..big thanks.
IndianaJo..yeah the 4558's are the 2 rows of 4-DIP version. And big thanks for your help too.
As this restoration project progresses BEWARE,,, I will no doubt "hit you guys up" for advice at times!! Thanks, greatly appreciated.
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Old 18th March 2012, 01:16 PM   #10
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Default Help wanted

Hi

I was reading the thread where you were restoring a Yamaha organ and from the questions I saw it would seem I am doing much the same to a Yamaha D85 as well.
Did you ever manage to find sources for the chips you were seeking?
Any help would be well received.
Thanks
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