Ensoniq ASR 10 not booting up

Ensoniq were taken over by EMU a while back so discussions on both products can be put here.

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OOS
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Ensoniq ASR 10 not booting up

Unread post by OOS »

Hi All


Just got a Ensoniq ASR 10 as faulty.
What i get is that when i power the unit on i get a blank screen and all buttons leds turned on underneath (pic 2). The floppy drive seems to work since the green light turns on and when i get a floppy there it works and then stops normaly like its loading. When the floppy stops i can get some characters on the screen like these ones shown on pic 1. No sound. I suspect somthing wrong with the PSU, any ideas ?
Update. I have reasitted all chips, connector, removed ram, cleaned it up and replaced, checked the jumber for any wrong position between exp/std. Also checked the fuses that are OK
But still no luck with this one.
Really wanna fix that cause i got it with a lot of factory disks and all user manuals the previous user was the original owner and kept it in a dry place. PCBs look like new.
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Gear used

Yamaha A5000,Yamaha TX 81Z, Yamaha DX 7 MK1, Korg M1, Korg DW 8000, Roland SH 2000, Roland SH 201, Roland R 5 Drum machine, Roland VS 2480 and a few Casio keyboards.
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Saul
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Re: Ensoniq ASR 10 not booting up

Unread post by Saul »

Don't really know much about the ASR other than it sounds great and I wouldn't mind one myself (Y)

I guess you checked the usual suspects such as capacitors? They don't always look faulty but they dry out over time and that would cause voltage problems resulting in the sort of issues you are seeing.

Does it have an internal battery and if so has it been changed?


Saul
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OOS
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Re: Ensoniq ASR 10 not booting up

Unread post by OOS »

Still the same with the asr i may try a recapping does anybody know the electrolytic caps specs - there are 8 caps on the psu - ?


Gear used

Yamaha A5000,Yamaha TX 81Z, Yamaha DX 7 MK1, Korg M1, Korg DW 8000, Roland SH 2000, Roland SH 201, Roland R 5 Drum machine, Roland VS 2480 and a few Casio keyboards.
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Saul
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Re: Ensoniq ASR 10 not booting up

Unread post by Saul »

Check the top of the caps for any sort of bulging. They should be flat. Might give you an idea what to replace?

Take the spec from the sides of the caps as it is written on there what the voltage and μF rating is.


Saul
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Dowina Acoustic Guitars: Dowina Cabernet DC
Dowina Chardonnay GAC DS - Dowina Rustica GAC - Dowina Marus - Dowina Puella

Please Note: This site is at times supported by Amazon Associate and other affiliate links. Any links in my posts may lead to products on the Amazon website or other vendors websites. These will not incur any extra cost to you but may help support the running costs of the site via the generation of a small commission should you choose to purchase a product.
OOS
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Re: Ensoniq ASR 10 not booting up

Unread post by OOS »

The problem is that in the service manual of 84 pages the caps specs are not mentioned or i cant find them anywhere, no they dont have any cosmetic issues but since i dont know how to measure psu voltages i thought that my last resort before i sell it would be to replace the capacitors on the psu. I have tried all other solutions. if i cant find the specs i will have to take out the psu and read the specs on the caps themselves.


Gear used

Yamaha A5000,Yamaha TX 81Z, Yamaha DX 7 MK1, Korg M1, Korg DW 8000, Roland SH 2000, Roland SH 201, Roland R 5 Drum machine, Roland VS 2480 and a few Casio keyboards.
OOS
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Re: Ensoniq ASR 10 not booting up

Unread post by OOS »

Did the recap with nothing new to mention it behaves the same so the problem lies somewhere else. If anybody can help about how to measure the psu just drop me a line.


Gear used

Yamaha A5000,Yamaha TX 81Z, Yamaha DX 7 MK1, Korg M1, Korg DW 8000, Roland SH 2000, Roland SH 201, Roland R 5 Drum machine, Roland VS 2480 and a few Casio keyboards.
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Miks
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Re: Ensoniq ASR 10 not booting up

Unread post by Miks »

The service manual for the ASR-10 is one of the most detailed SM's I've ever seen - it has ALL the informations you need to measure the psu's voltages!

Sorry to say, but I'm under the impression that you buy a lot of non- or only partly working gear hoping it would be an easy job to fix them, but to me it seems that your obviously limited electronic skills do not that often allow you to bring those gear back to life...


P.S.
As for me - I have NO experience(s) with any Ensonic equipment whatsoever...


My (key related) gear (in alphabetical order):
Ferrofish: B4000+
Kawai: K1 II
Korg: M1 (up'd to EX, w/ 'Cool Blue'), M1REX (w/ 'Cool Blue'), Poly-800
Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500,
TX-802, YMM2
Sector101: SYEMB05 (5x), SYEMB06 (3x), EXFLM2 (1kit), MCD Sweet16 (1x), DataBlade32 (1x),
WaveBlade 8MB Card (1x) & 1x Programmer Unit for WaveBlade
OOS
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Re: Ensoniq ASR 10 not booting up

Unread post by OOS »

Hi Miks

Its true that i buy a lot of old synths in order to restore them and make them work again.
Also its true that i dont know many things about electronics and thats why i post here in order for you - that you have tried to help me a lot in previous cases indeed - or other people to help restore them in working condition.

I think its not something bad or something wrong with this, if however there is a problem with my posts please do let me know in order to not disturb you or other people here.

I thought this was a forum that members ask various tech issues, if i am wrong let me know.


Gear used

Yamaha A5000,Yamaha TX 81Z, Yamaha DX 7 MK1, Korg M1, Korg DW 8000, Roland SH 2000, Roland SH 201, Roland R 5 Drum machine, Roland VS 2480 and a few Casio keyboards.
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Miks
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Re: Ensoniq ASR 10 not booting up

Unread post by Miks »

OOS wrote: Mon Jun 22, 2020 3:33 pmI think its not something bad or something wrong with this, if however there is a problem with my posts please do let me know in order to not disturb you or other people here.

I thought this was a forum that members ask various tech issues, if i am wrong let me know.
Oh no - please don't get me wrong! There's nothing wrong at all with posting your questions here in order to find/get some help. And if I can I'll try to help...


My (key related) gear (in alphabetical order):
Ferrofish: B4000+
Kawai: K1 II
Korg: M1 (up'd to EX, w/ 'Cool Blue'), M1REX (w/ 'Cool Blue'), Poly-800
Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500,
TX-802, YMM2
Sector101: SYEMB05 (5x), SYEMB06 (3x), EXFLM2 (1kit), MCD Sweet16 (1x), DataBlade32 (1x),
WaveBlade 8MB Card (1x) & 1x Programmer Unit for WaveBlade
OOS
Member
Member
Posts: 97
Joined: Mon May 01, 2017 10:25 pm

Re: Ensoniq ASR 10 not booting up

Unread post by OOS »

Thank you in person and in public Miks for your attitude, i dont do that for a living i just like old synths like we all do here this is why i ask people that know much more than me in order to make all this gear work again for the years to come. Sometimes it works sometimes not. Keep up the good work.


Gear used

Yamaha A5000,Yamaha TX 81Z, Yamaha DX 7 MK1, Korg M1, Korg DW 8000, Roland SH 2000, Roland SH 201, Roland R 5 Drum machine, Roland VS 2480 and a few Casio keyboards.
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