Author Topic: AION Comet DS1 - sound is a low fuzz  (Read 486 times)

broomhandle

AION Comet DS1 - sound is a low fuzz
« on: February 17, 2021, 06:06:19 PM »
Hello Everybody,

I have built a Lion DS-1. I chose the vintage build. I get sound when engaged. Volume and tone work. The distortion knob does nothing. It sounds like a low "tone turned down" fuzz. Pictures attached.

any help?










antonis

Re: AION Comet DS1 - sound is a low fuzz
« Reply #1 on: February 17, 2021, 06:29:25 PM »
Check continuity between DIST pot lug 3 -> R10(47k) -> C7 (1μF) -> GND

If something there is "open", IC1A acts as a buffer (unity gain) so the only distortion comes from Q2 preceding stage..
"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..

iainpunk

Re: AION Comet DS1 - sound is a low fuzz
« Reply #2 on: February 17, 2021, 08:58:01 PM »
i suggest you lookt at this link:debugging guide

cheers, Iain
half man - half snail - 6 feet to scale - Snail man's - not frail - He's been - to jail - snail man is fuccing real
『snailpilled』

broomhandle

Re: AION Comet DS1 - sound is a low fuzz
« Reply #3 on: February 18, 2021, 08:15:04 PM »
Thank you, I am testing now. Trying to figure it out...

broomhandle

Re: AION Comet DS1 - sound is a low fuzz
« Reply #4 on: February 22, 2021, 04:13:50 PM »
Hello,

thanks for helping. When we are talking Left and Right, I think we are talking about from looking at the top.

My results are odd (Left and Right) I am not the best with a DMM... here are my results. :)

1.) DMM on cont. red prob on dist lug 3, black probe on R10 right leg.  = no beep on right leg ( - ), but beep on left ( + )  (looking from top down)
2.) DMM on resistance. black prob on dist lug 3, red on R3 =   I get no reading.
3.) DMM on cont. black prob on dist lug 3, reg prob C7 = no beep on either leg.
4.) DMM on cont. Red prob on C7, black on ground. = beep on ( - ) right leg. no beep from left leg (+)

antonis

Re: AION Comet DS1 - sound is a low fuzz
« Reply #5 on: February 22, 2021, 05:03:54 PM »
I might confused you about Left-Right, so here it is:

"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..

broomhandle

Re: AION Comet DS1 - sound is a low fuzz
« Reply #6 on: February 22, 2021, 05:43:25 PM »
I think I am more confused now.

so for C7, are you saying left leg as in (+) or (-)

and for 1-3. the red prob should be on lug 3 of dist pot?

I think this is right... photo attached...

sorry if I am more confused now.


antonis

Re: AION Comet DS1 - sound is a low fuzz
« Reply #7 on: February 22, 2021, 05:56:31 PM »
Forget about DMM probe polarity, either for continuity test or resistance measurement..
(you don't read your P.M.s thoroughly..) :icon_mrgreen:

C7 Left leg should be the one marked (-)

As for R10, place one probe to pot lug 3 and the other probe to one of R10 legs..
You have two options:
1. Beep -> OK
2. No beep -> turn to resistance measurement mode -> 47k -> OK (no need for other leg beeping now..)
"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..

broomhandle

Re: AION Comet DS1 - sound is a low fuzz
« Reply #8 on: February 22, 2021, 08:24:53 PM »
Ok..

1.) LUG 3 > R10 = a beep on the left side. "Picture attached". If that is not correct. I can do this:

No beep -> turn to resistance measurement mode -> 47k -> OK (no need for other leg beeping now..)

2.) Lug 3 > C7 Right (+) = No Beep
3.) C7 Left (-) > Ground = Beep

Sorry if any confusion. I am a novice. I just thought this is fun, until one has issues.. thank you again everybody for helping.


antonis

Re: AION Comet DS1 - sound is a low fuzz
« Reply #9 on: February 23, 2021, 04:29:13 AM »
OK.. :icon_wink:

Now measure resistance between pot lug 3 and C7 right (+)..
"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..

broomhandle

Re: AION Comet DS1 - sound is a low fuzz
« Reply #10 on: February 23, 2021, 11:57:35 AM »
at 200k I get 4.5

antonis

Re: AION Comet DS1 - sound is a low fuzz
« Reply #11 on: February 23, 2021, 03:30:48 PM »
So, NFB gain branch is OK..

Check for pot lug2 & lug1 connections..
"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..

broomhandle

Re: AION Comet DS1 - sound is a low fuzz
« Reply #12 on: February 23, 2021, 05:29:00 PM »
So now check Lug 1 and 2: resistance  C7 right (+)..

the connections of lug 1 and 2 solider looks good.

antonis

Re: AION Comet DS1 - sound is a low fuzz
« Reply #13 on: February 24, 2021, 05:17:33 AM »
Sorry but I tend to forget your initial issue..  :icon_wink:

So, let's get it from the beginning:

Check all pot connections to respective items..
e.g Lug 1  to IC1A pin 6, C5, C6 & R12..
Lug 2 (wiper) to C5 & R9
R9 to IC1A pin 3..
"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..

broomhandle

Re: AION Comet DS1 - sound is a low fuzz
« Reply #14 on: February 24, 2021, 03:02:56 PM »
I am a little confused again. Are you asking to get continuity (beep)? or a measurement?

Lug 1  > IC1A pin 6, C5, C6 & R12
Lug 2 > C5 & R9

R9 to IC1A pin 3.. (?)




Sorry but I tend to forget your initial issue..  :icon_wink:

So, let's get it from the beginning:

Check all pot connections to respective items..
e.g Lug 1  to IC1A pin 6, C5, C6 & R12..
Lug 2 (wiper) to C5 & R9
R9 to IC1A pin 3..

antonis

Re: AION Comet DS1 - sound is a low fuzz
« Reply #15 on: February 24, 2021, 03:15:04 PM »
Check for proper connection and value of everyone item and wiring inside red frame..

"I'm getting older while being taught all the time" Solon the Athenian..
"I don't mind  being taught all the time but I do mind a lot getting old" Antonis the Thessalonian..