madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: geekmacdaddy on July 22, 2025, 01:43:40 PM

Title: Schoolie 24 problem
Post by: geekmacdaddy on July 22, 2025, 01:43:40 PM
Hey Guys and Gals
Voltages are all good on the big board but when I attach the daughter board, the overload LED just flashes. Made a mistake and reversed + and - on the DC jack at first, so I rebuilt the entire power supply. Even the 2N5088, but the LED is still flashing in the off position, and lights in a strained intermittent way in the on position. Any thoughts are appreciated.
Thanks
Jeff
Title: Re: Schoolie 24 problem
Post by: geekmacdaddy on July 22, 2025, 08:49:02 PM
The readings I mentioned earlier were the start up readings. Here's the bottom board loaded (LT1054 is fucked so the rest are a bit off too).
IC 6 LT1054
1 000
2 4.49
3 000
4 000
5 000
6 3.147
7 6.1
8 9.17
IC1
1 7.50
2 7.51
3 7.49
4 000
5 7.43
6 7.5
7 7.5
8 15.04
IC 2
1 1.50
2 1.8
3 1.8
4 000
5 1.84
6 1.8
7 8
8 1.8
9 1.8
10 7.66
11 1.8
12 1.8
13 15.04
14 1.87
15 1.89
161.86
IC3
1 13.73
2 13.71
3 .22
4 0
5 7.58
6 7.66
7 7.66
8 15.04
IC4
1 Vary
2-7 all jumpy 7-8v
8 15
IC5
1 6.76
2 8.25
3 8.22
4 15
5 15
6 15
7 000
8 000
9 000
10 7.51
11 7.51
12 000
13 6.76
14 15v
IC7
1 vary
2 7.84 jumpy
3 vary
4 000
5-7 7.84 jumpy
8 13 jumpy
Title: Schoolie 24 problem
Post by: jimilee on July 22, 2025, 10:40:33 PM
Have you replaced the 1054 yet? Can you hear the relay working?


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Title: Re: Schoolie 24 problem
Post by: geekmacdaddy on July 22, 2025, 11:45:26 PM
Hey Jimmy!
Swapped it out, same. Don't have the spider sense for that relay.
Thanks
Jeff
Title: Re: Schoolie 24 problem
Post by: madbean on July 22, 2025, 11:50:17 PM
Overload LED is oriented correctly? Does the flashing go away if you turn the Feedback all the way down?
Title: Re: Schoolie 24 problem
Post by: geekmacdaddy on July 23, 2025, 12:32:00 AM
Hi Brian
Correct direction. No, it remains.
Thanks
Jeff
Title: Re: Schoolie 24 problem
Post by: geekmacdaddy on July 25, 2025, 12:26:18 AM
Would you believe (Don Adams
Get Smart, tv series voice) a dodgy NE570N? Not a ton of hair there to start. Now there's a bit less.  :)
Thanks All  :)
Title: Re: Schoolie 24 problem
Post by: jimilee on July 25, 2025, 12:59:50 AM
I was wondering about that. Those things are sensitive.
Title: Re: Schoolie 24 problem
Post by: geekmacdaddy on July 25, 2025, 01:40:28 AM
Quote from: jimilee on July 25, 2025, 12:59:50 AMI was wondering about that. Those things are sensitive.


Son of a bitch sounded dreamy then let out a death wail. Unholiness in the midst of my cloud like modulated world. I'll hit the IC's and see what see. Tomorrow.
Title: Re: Schoolie 24 problem
Post by: benh on July 26, 2025, 06:29:09 AM
Quote from: geekmacdaddy on July 25, 2025, 12:26:18 AMWould you believe (Don Adams
Get Smart, tv series voice) a dodgy NE570N? Not a ton of hair there to start. Now there's a bit less.  :)
Thanks All  :)
I had the same problem, sorry I didn't see your post earlier. I bought a few from a local (Australian) pedal parts shop, they are all bad. They apologized and refunded, I ended using a v571d from Cabintech.

Sent from my Pixel 9 Pro Fold using Tapatalk

Title: Re: Schoolie 24 problem
Post by: geekmacdaddy on July 26, 2025, 09:09:06 PM
I h
Quote from: benh on July 26, 2025, 06:29:09 AM
Quote from: geekmacdaddy on July 25, 2025, 12:26:18 AMWould you believe (Don Adams
Get Smart, tv series voice) a dodgy NE570N? Not a ton of hair there to start. Now there's a bit less.  :)
Thanks All  :)
I had the same problem, sorry I didn't see your post earlier. I bought a few from a local (Australian) pedal parts shop, they are all bad. They apologized and refunded, I ended using a v571d from Cabintech.

Sent from my Pixel 9 Pro Fold using Tapatalk


I've used Xvive MN3005's with great success. (Edit) and Cool Audio :)