Emax

dont know depends on how fast you find the problem

the way i do it is first i swap boards out to get the machine running once i 
have diagnosed which board is causing the problem then i work on that board 
at the componant level

using my digital volt meter then using the oscillascope and logic anilyser i 
test the good board first and do all my measurements then i test the bad 
board for the same measurements from this i can tell which chips are acting 
up
----- Original Message ----- 
From: "RJ" <errorspending@...>
To: <emax@yahoogroups.com>
Sent: Thursday, February 25, 2010 8:28 PM
Subject: Re: [emax] Re: Emax Rack - no sound..or barely any


> and how many hours would it take to diagnose and likely fix such a 
> problem?
>
> On Thu, Feb 25, 2010 at 12:20 PM, RJ <errorspending@...> wrote:
>
>> how much would you buy it for?
>>
>>
>>
>> On Thu, Feb 25, 2010 at 11:31 AM, jammie 
>> <jammie.emma@...>wrote:
>>
>>>
>>>
>>> in the usa your looking at $70 per hour for a good reputable synth 
>>> repair
>>> tech
>>>
>>> some i can recomend for usa is thesonic he,s my counter part in the usa
>>>
>>> you could ask ted or myself who repair ted lives in the usa i live in 
>>> the
>>> uk
>>>
>>> or you could sell it as spare parts i buy broken boards and scavenge the
>>> parts to repair other emaxes as there are some chips that you just cant 
>>> buy
>>> any more the synth chip is 1 they are rare as are some custom ic,s 
>>> produced
>>> by emu
>>>
>>> ill buy if you decide to part it
>>>
>>> or if you decide to fix it i can help there to
>>>
>>> ----- Original Message -----
>>> From: leavesstillgreen
>>> To: emax@yahoogroups.com <emax%40yahoogroups.com>
>>> Sent: Thursday, February 25, 2010 6:58 PM
>>> Subject: [emax] Re: Emax Rack - no sound..or barely any
>>>
>>> Ok, thanks. Know of anyone in the Los Angeles area who has done work on
>>> these? How much should I expect to pay for repair?
>>>
>>> I'm wondering if it would be better to just sell it and let somebody 
>>> else
>>> deal with the problem...
>>>
>>> --- In emax@yahoogroups.com <emax%40yahoogroups.com>, "jammie"
>>> <jammie.emma@...> wrote:
>>> >
>>> > yes and no you need an oscillascope and a logic anyliser to make sure
>>> all the logic chips are working properly and the oscilascope for testing
>>> waveforms and power functions i can help a bit when things are specific 
>>> like
>>> with the control off the filters recently were i said it was the cv dac 
>>> that
>>> was at fault
>>> >
>>> > but he had full sound just no control with yours it could be various
>>> things there a lot of logic chips for the control of the analog voice 
>>> board
>>> but also theres the 12bit dacs that could be at fault i would need to 
>>> have
>>> the machine for testing to
>>> >
>>> > diagnose properly
>>> > ----- Original Message -----
>>> > From: leavesstillgreen
>>> > To: emax@yahoogroups.com <emax%40yahoogroups.com>
>>> > Sent: Thursday, February 25, 2010 6:37 PM
>>> > Subject: [emax] Re: Emax Rack - no sound..or barely any
>>> >
>>> >
>>> >
>>> > yikes..exactly what i didn't want to hear :(
>>> >
>>> > How would a synth tech diagnose it? Is it something I could try to do
>>> with a voltmeter?
>>> >
>>> > --- In emax@yahoogroups.com <emax%40yahoogroups.com>, "jammie"
>>> <jammie.emma@> wrote:
>>> > >
>>> > > it sounds like the voice board is shot needs servicing
>>> > >
>>> > > this needs to be examined by a repair tech as there are many things
>>> that could be wrong and neads extensive testing on conponent level
>>> > > ----- Original Message -----
>>> > > From: leavesstillgreen
>>> > > To: emax@yahoogroups.com <emax%40yahoogroups.com>
>>> > > Sent: Thursday, February 25, 2010 5:25 PM
>>> > > Subject: [emax] Emax Rack - no sound..or barely any
>>> > >
>>> > >
>>> > >
>>> > > So I just purchased an Emax SE HD rack.
>>> > >
>>> > > Problem -
>>> > > When amplified an enormous amount I can hear what sounds like 
>>> > > samples
>>> playing and the pitch tracks with the midi notes, but it is barely 
>>> audible.
>>> > >
>>> > > The volume slider has no effect on the barely audible noises I'm
>>> hearing. (calibrated volume slider with no results)
>>> > >
>>> > > I've plugged an external synth into the sample input and can also
>>> barely hear it when the emax is amplified a lot. Interestingly, I can 
>>> still
>>> hear this even when the emax is not turned on.
>>> > >
>>> > > So are there any tests I can do to diagnose the exact problem?
>>> > >
>>> > > When plugging into the sample input, should I be able to hear 
>>> > > whatever
>>> is being fed into it easily? I'm very unfamiliar with how one should 
>>> work.
>>> > >
>>> > > Is it possible one of the foot pedal inputs is affecting the volume 
>>> > > at
>>> all times even for the sample input? (I had an issue like this with my
>>> memorymoog)
>>> > >
>>> > > These functions seem to be working...
>>> > > - loads up from floppy disk and loads presets (hard drive doesn't
>>> work)
>>> > > - ran midi diagnostics and it is receiving midi correctly
>>> > > - all buttons on front panel are working properly
>>> > >
>>> > > Thanks in advance for any help! I really really appreciate it!
>>> > >
>>> > > -RJ
>>> > >
>>> > >
>>> > >
>>> > >
>>> > >
>>> > >
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>>> > >
>>> > >
>>> > >
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>>> 02/24/10 19:34:00
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>>> >
>>> >
>>> >
>>> >
>>> >
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>>> >
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>>>
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Emax and Emax II User's Group Website
>
> http://www.silveriafamily.comYahoo! Groups Links
>
>
>


--------------------------------------------------------------------------------



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.435 / Virus Database: 271.1.1/2709 - Release Date: 02/25/10 
07:34:00