Korg Poly800/EX800 Users

It seems to be so - cable has two ends, I suppose one is 6A, another 6B.

Daniel Forro


On May 16, 2017, at 7:09 PM, purpurinisukutis@... [korgpolyex]  
wrote:

> Thank you! Now i clearly see numbers of connector pins, thank you  
> for correcting me, it is truly connector, my mistake. Thanks about  
> showing where KL-003 is. Just to be sure - so CN6 in first step of  
> check and adjustment procedure is the same as the CN6A at third step  
> of check and adjustment procedure?

Any adapter which has the same output (volts, amperes), connector and  
polarity could work - inside the instrument there are regulators so I  
think they would deliver proper voltages to internal circuits.

Maybe yours will work too, when you will set proper voltage +5 Volt  
with VR1 in regulator circuit. -5 Volt rail seems to be allowing more  
tolerance - according to the point 1 it can be between -4.7 ~ -5.7  
Volt. Just try it. If voltages will be out of spec, you should try  
different adapter, more near to the original one.

Daniel Forro


On May 16, 2017, at 8:18 PM, purpurinisukutis@... [korgpolyex]  
wrote:

> Few steps in adjustment procedure consists of measuring voltage  
> while using original 9V, 300mA AC adapter, however when i bought the  
> synth i got not original power supply - its 8.5V, 350 mA. Do you  
> think that i could use that one for this procedure, or do i need to  
> buy specificly  9V, 300mA AC adapter? If original adapter is needed,  
> maybe you know some alternatives for it?

You are welcome.

Daniel Forro


On May 16, 2017, at 9:58 PM, purpurinisukutis@... [korgpolyex]  
wrote:

> Thank you. :)

You should buy the correct voltage 9V DC, 300mA adapter. If you adjust the voltages in the synth with 8.5V then if someone in the future was to use a correct 9V, it might cause the power supply or even other parts in the synth to fail.
Get a correct AC adapter - 9V DC 300mA.

/Mike


      From: "purpurinisukutis@... [korgpolyex]" <korgpolyex@yahoogroups.com>
 To: korgpolyex@yahoogroups.com 
 Sent: Tuesday, May 16, 2017 7:18 AM
 Subject: Re: [korgpolyex] Re: Check and adjustment procedure
   
    Few steps in adjustment procedure consists of measuring voltage while using original 9V, 300mA AC adapter, however when i bought the synth i got not original power supply - its 8.5V, 350 mA. Do you think that i could use that one for this procedure, or do i need to buy specificly  9V, 300mA AC adapter? If original adapter is needed, maybe you know some alternatives for it?  #yiv3003593522 #yiv3003593522 -- #yiv3003593522ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv3003593522 #yiv3003593522ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv3003593522 #yiv3003593522ygrp-mkp #yiv3003593522hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv3003593522 #yiv3003593522ygrp-mkp #yiv3003593522ads {margin-bottom:10px;}#yiv3003593522 #yiv3003593522ygrp-mkp .yiv3003593522ad {padding:0 0;}#yiv3003593522 #yiv3003593522ygrp-mkp .yiv3003593522ad p {margin:0;}#yiv3003593522 #yiv3003593522ygrp-mkp .yiv3003593522ad a {color:#0000ff;text-decoration:none;}#yiv3003593522 #yiv3003593522ygrp-sponsor #yiv3003593522ygrp-lc {font-family:Arial;}#yiv3003593522 #yiv3003593522ygrp-sponsor #yiv3003593522ygrp-lc #yiv3003593522hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv3003593522 #yiv3003593522ygrp-sponsor #yiv3003593522ygrp-lc .yiv3003593522ad {margin-bottom:10px;padding:0 0;}#yiv3003593522 #yiv3003593522actions {font-family:Verdana;font-size:11px;padding:10px 0;}#yiv3003593522 #yiv3003593522activity {background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;}#yiv3003593522 #yiv3003593522activity span {font-weight:700;}#yiv3003593522 #yiv3003593522activity span:first-child {text-transform:uppercase;}#yiv3003593522 #yiv3003593522activity span a {color:#5085b6;text-decoration:none;}#yiv3003593522 #yiv3003593522activity span span {color:#ff7900;}#yiv3003593522 #yiv3003593522activity span .yiv3003593522underline {text-decoration:underline;}#yiv3003593522 .yiv3003593522attach {clear:both;display:table;font-family:Arial;font-size:12px;padding:10px 0;width:400px;}#yiv3003593522 .yiv3003593522attach div a {text-decoration:none;}#yiv3003593522 .yiv3003593522attach img {border:none;padding-right:5px;}#yiv3003593522 .yiv3003593522attach label {display:block;margin-bottom:5px;}#yiv3003593522 .yiv3003593522attach label a {text-decoration:none;}#yiv3003593522 blockquote {margin:0 0 0 4px;}#yiv3003593522 .yiv3003593522bold {font-family:Arial;font-size:13px;font-weight:700;}#yiv3003593522 .yiv3003593522bold a {text-decoration:none;}#yiv3003593522 dd.yiv3003593522last p a {font-family:Verdana;font-weight:700;}#yiv3003593522 dd.yiv3003593522last p span {margin-right:10px;font-family:Verdana;font-weight:700;}#yiv3003593522 dd.yiv3003593522last p span.yiv3003593522yshortcuts {margin-right:0;}#yiv3003593522 div.yiv3003593522attach-table div div a {text-decoration:none;}#yiv3003593522 div.yiv3003593522attach-table {width:400px;}#yiv3003593522 div.yiv3003593522file-title a, #yiv3003593522 div.yiv3003593522file-title a:active, #yiv3003593522 div.yiv3003593522file-title a:hover, #yiv3003593522 div.yiv3003593522file-title a:visited {text-decoration:none;}#yiv3003593522 div.yiv3003593522photo-title a, #yiv3003593522 div.yiv3003593522photo-title a:active, #yiv3003593522 div.yiv3003593522photo-title a:hover, #yiv3003593522 div.yiv3003593522photo-title a:visited {text-decoration:none;}#yiv3003593522 div#yiv3003593522ygrp-mlmsg #yiv3003593522ygrp-msg p a span.yiv3003593522yshortcuts {font-family:Verdana;font-size:10px;font-weight:normal;}#yiv3003593522 .yiv3003593522green {color:#628c2a;}#yiv3003593522 .yiv3003593522MsoNormal {margin:0 0 0 0;}#yiv3003593522 o {font-size:0;}#yiv3003593522 #yiv3003593522photos div {float:left;width:72px;}#yiv3003593522 #yiv3003593522photos div div {border:1px solid #666666;height:62px;overflow:hidden;width:62px;}#yiv3003593522 #yiv3003593522photos div label {color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;}#yiv3003593522 #yiv3003593522reco-category {font-size:77%;}#yiv3003593522 #yiv3003593522reco-desc {font-size:77%;}#yiv3003593522 .yiv3003593522replbq {margin:4px;}#yiv3003593522 #yiv3003593522ygrp-actbar div a:first-child 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Damn. Is there a way to find if previous owner adjusted the voltages in the synth with 8.5V? Just in case to be safe.. I found that near me there are two options of AC adapter - one is "Power supply non-stabilized 9V 300mA 2.1 / 5.5 {+}" and another is "Pulsed power supply 3-12V 0.3A, plug-in", changing polarity is not the problem for me. Which one do you think will suit it better? One adapter is pulsed and another is non-stabilized - i wonder what kind of properties do original Korg Poly 800 charger had.

you should have the full 9volts 

ive noodled with mine and as power decreases so does the response and tuning of synthesizer


--------------------------------------------
On Tue, 5/16/17, purpurinisukutis@... [korgpolyex] <korgpolyex@yahoogroups.com> wrote:

 Subject: Re: [korgpolyex] Re: Check and adjustment procedure
 To: korgpolyex@yahoogroups.com
 Received: Tuesday, May 16, 2017, 7:18 AM
 
 
  
 
 
 
   
 
 
     
       
       
       Few steps in adjustment procedure consists of
 measuring voltage while using original 9V, 300mA AC adapter,
 however when i bought the synth i got not original power
 supply - its 8.5V, 350 mA. Do you think that i could use
 that one for this procedure, or do i need to buy specificly
  9V, 300mA AC adapter? If original adapter is needed, maybe
 you know some alternatives for it?
 
     
      
 
     
     
 
 
 
 #yiv3572232245 #yiv3572232245 --

On Tue, May 16, 2017 at 02:27:53PM +0000, Michael Hawkins korgpolyex800@... [korgpolyex] wrote:
> You should buy the correct voltage 9V DC, 300mA adapter. If you adjust the voltages in the synth with 8.5V then if someone in the future was to use a correct 9V, it might cause the power supply or even other parts in the synth to fail.
> Get a correct AC adapter - 9V DC 300mA.
> 
> /Mike

For the Poly 800?  9V at something approaching 1A is more like the thing, and the exact voltage is unimportant since it hits the voltage regulator first.

Below about 8V you will run into reliability issues and above about 12V you'll start to overheat the big power tranny in the series pass regulator.

Bear in mind that even with the "correct" 9V adaptor it is not regulated and will provide anything from about 8.5V to about 11V depending on how close your incoming mains is to its nominal value.

-- 
Gordonjcp MM0YEQ

Thanks, found it. :) 

    On Friday, May 26, 2017 5:03 PM, "Daniel Forró danforcz@... [korgpolyex]" <korgpolyex@yahoogroups.com> wrote:
 

     Let me guess: to the ground?
:-)
Daniel Forro

On May 26, 2017, at 10:26 PM, purpurinisukutis@... [korgpolyex] wrote:

Hello, I am trying to do check and adjustment procedures first step – 5V check. I know that one wire of voltmeter should be connected to CN 6 Pin 6, but where should I connect another wire?

No, you can't do that with a multimeter because it will read the RMS value instead of peak to peak.
Use your oscilloscope, set the sweep to somewhere from 50uS to 20mS. Then make sure the white noise level is 0.3V from lowest to highest (peak to peak).

/Mike


      From: "purpurinisukutis@...m [korgpolyex]" <korgpolyex@yahoogroups.com>
 To: korgpolyex@...m 
 Sent: Saturday, May 27, 2017 4:55 AM
 Subject: Re: [korgpolyex] Re: Check and adjustment procedure
   
    Hello again, maybe last question about this topic... :) Noise level check and adjustment: connect oscilloscope to KLM-596 CNA 3 pin and confirm noise level of 0.3 V p-p (+-20%).  How to do that with oscilloscope? I am using old russian C1-94. Maybe i can do the same with voltmeter?  #yiv1692186370 #yiv1692186370 -- #yiv1692186370ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv1692186370 #yiv1692186370ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv1692186370 #yiv1692186370ygrp-mkp #yiv1692186370hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv1692186370 #yiv1692186370ygrp-mkp #yiv1692186370ads {margin-bottom:10px;}#yiv1692186370 #yiv1692186370ygrp-mkp .yiv1692186370ad {padding:0 0;}#yiv1692186370 #yiv1692186370ygrp-mkp .yiv1692186370ad p {margin:0;}#yiv1692186370 #yiv1692186370ygrp-mkp .yiv1692186370ad a {color:#0000ff;text-decoration:none;}#yiv1692186370 #yiv1692186370ygrp-sponsor #yiv1692186370ygrp-lc {font-family:Arial;}#yiv1692186370 #yiv1692186370ygrp-sponsor #yiv1692186370ygrp-lc #yiv1692186370hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv1692186370 #yiv1692186370ygrp-sponsor #yiv1692186370ygrp-lc .yiv1692186370ad 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