Pedal Debugging & Troubleshooting Support

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Debugging 101
General rules and hints to succesfuly bring back that old pedal to life
Topics: 8

8 Topics

34 Posts

Last post Re: What is an audio probe an…
The G
12 oct 2020, 07:29
PCB Guitar Mania - pedal builders group and debug

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Orange Rockerverb Preamp J201 Problems

Last post by KeenVox « Yesterday, 10:45
Replies: 7
by KeenVox » 12 Mar 2021, 21:25

Hello everyone,

happy to make my first post, sad because it starts with a problem.

I built an Orange Rockerverb Preamp based on the attached...

7 Replies

360 Views

Last post by KeenVox
Yesterday, 10:45
Aion fx oceanid compressor

Last post by AndrewGallios « 18 Apr 2021, 22:25
Replies: 6
by AndrewGallios » 13 Apr 2021, 09:35

Rating: 0.4%

hi

i bought the oceanid pcb from aion fx
i built it and it was fine until i tested the buffered or truebypass section of the small pcb on the...

6 Replies

250 Views

Last post by AndrewGallios
18 Apr 2021, 22:25
Blackstar HT-Delay

Last post by Yazoo55 « 13 Apr 2021, 16:40
Replies: 1
by Yazoo55 » 03 Apr 2021, 17:14

I bought this pedal “for parts/not working” off eBay. I have disassembled it and it was immediately obvious something nasty had happened on the lower...

1 Replies

90 Views

Last post by Yazoo55
13 Apr 2021, 16:40
Silicon fuzz face hiss

Last post by Manfred « 12 Apr 2021, 05:46
Replies: 4
by Silvio55 » 11 Apr 2021, 21:14

Hi, Just finished a silicon fuzz face, I used two 2n3904 hfe around 210 for both. Biased q2c lowering the colector resistor at 5.2 volts, q1c is at...

4 Replies

117 Views

Last post by Manfred
12 Apr 2021, 05:46
B3K Clone Troubleshooting Help

Last post by forgotmyeeclass « 09 Apr 2021, 16:22
Replies: 5
by forgotmyeeclass » 08 Apr 2021, 13:04

Hi folks,

I recently put together my first ever build, the PCB Guitar Mania Black Mirror which is a B3K clone. Schematics and layout can be found...

5 Replies

178 Views

Last post by forgotmyeeclass
09 Apr 2021, 16:22
Digitech Control Seven pedalboard schematic

Last post by FiveseveN « 06 Apr 2021, 04:09
Replies: 1
by emastyle » 05 Apr 2021, 10:10

Hello, I'm looking for Digitech Control Seven pedalboard schematic. Anyone can help me?

1 Replies

136 Views

Last post by FiveseveN
06 Apr 2021, 04:09
MXR Phase 100 - output level [SOLVED]

Last post by DjPsychic « 04 Apr 2021, 14:19
Replies: 15
by DjPsychic » 31 Mar 2021, 17:30

Rating: 1.5%

Hola,

Just got an older block MXR Phase 100. Love it, but I feel there's a little bit of volume loss when engaged. I did TB it so that may be...

15 Replies

492 Views

Last post by DjPsychic
04 Apr 2021, 14:19
Aion Supreaux help [SOLVED]

Last post by aionios « 31 Mar 2021, 19:14
Replies: 6
by yroc06 » 30 Mar 2021, 21:14

Rating: 0.9%

Hi there, I’m new to posting on forums. I usually poke around for the info I need and bug out, but i’m running into something I really don’t...

6 Replies

248 Views

Last post by aionios
31 Mar 2021, 19:14
Volume Sag with Attack? (germanium fuzz/MK1 content)

Last post by stolen « 31 Mar 2021, 18:39
Replies: 1
by Dr Tony Balls » 31 Mar 2021, 17:03

Hi. Looking at a fuzz for a friend and it's got a strange problem that i've not encountered before. It's a MK1 Tone Bender type (Maestro FZ-1, Zonk,...

1 Replies

102 Views

Last post by stolen
31 Mar 2021, 18:39
Dunlop Rotovibe JD-4S 90's - FX is not working anymore

Last post by stolen « 29 Mar 2021, 14:02
Replies: 3
by Allapes » 27 Mar 2021, 21:49

Hi

I have a Rotovibe JD-4S since the 90's and never encountered any issues with it until yesterday.
The pedal was unused for like 6 months and...

3 Replies

270 Views

Last post by stolen
29 Mar 2021, 14:02
Tremolo

Last post by Robin28 « 27 Mar 2021, 10:59
Replies: 8
by Robin28 » 18 Mar 2021, 13:27

Rating: 1.1%

Hello, everyone.

I tried to build a tremolo
An easy build (3 2n5088 and one tl072.)
The tremolo works fine but I Have an Kind of electronic clic...

8 Replies

388 Views

Last post by Robin28
27 Mar 2021, 10:59
Boss Tu-2 Repair [SOLVED]

Last post by stolen « 16 Mar 2021, 20:43
Replies: 5
by munkeyboy » 15 Mar 2021, 23:03

Rating: 0.6%

So I got this pedal in a used package buy and would like to save it if possible. This pedal isn't showing the notes. It turns on and passes audio,...

5 Replies

312 Views

Last post by stolen
16 Mar 2021, 20:43
Help needed with BAJA Ampeg SVT bass amp pedal

Last post by Paul_5 « 10 Mar 2021, 21:54
Replies: 12
by R2Bass » 24 Feb 2021, 23:17

I built the following pedal:

The problem is that the circuit saturates too early.

Measuring the output of op amps using an oscilloscope I found...

12 Replies

1072 Views

Last post by Paul_5
10 Mar 2021, 21:54
Low output on T-Rex Squeezer

Last post by stolen « 04 Mar 2021, 10:35
Replies: 2
by Rik86 » 01 Jan 2021, 16:37

Hi all,

Could you help me out with my T-Rex squeezer? I got it as a defective extra to another purchase, so no idea about its history (wear on the...

2 Replies

866 Views

Last post by stolen
04 Mar 2021, 10:35
Help needed - Boss FZ-5

Last post by masterdikafri « 02 Mar 2021, 17:05
Replies: 3
by masterdikafri » 18 Feb 2021, 00:14

Hello Everyone,

i am really scratching my head over a boss FZ-5 pedal that came into my hands.
Unfortunately cant seem to find any schematics of it...

3 Replies

323 Views

Last post by masterdikafri
02 Mar 2021, 17:05
XO Stereo Clone Theory issues

Last post by Fender3D « 02 Mar 2021, 15:13
Replies: 8
by clone_theory » 25 Nov 2015, 15:40

Rating: 0.4%

Hello,

I have one of the newer stereo Clone Theory pedals from Electro Harmonix. This was my favorite pedal until I messed with the internal trim...

8 Replies

606 Views

Last post by Fender3D
02 Mar 2021, 15:13
Eventide H949 issues

Last post by 9 volt « 02 Mar 2021, 00:40

by 9 volt » 02 Mar 2021, 00:40

Hi there, does anyone have any experience. Mine stopped working last week and now seems to only self generate its own sound...thanks

0 Replies

130 Views

Last post by 9 volt
02 Mar 2021, 00:40
Behringer Chorus Troubleshoot

Last post by the_ungod « 01 Mar 2021, 16:13
Replies: 2
by the_ungod » 01 Mar 2021, 10:55

Hi Guys,

I have a Behgringer Chorus pedal.
When i connect it, the guitar sound passes through ok.
When i turn it on, the led lights up but the...

2 Replies

153 Views

Last post by the_ungod
01 Mar 2021, 16:13
Klon summing op amp is driving me nuts!

Last post by az10sbum « 01 Mar 2021, 06:27
Replies: 1
by matoni » 14 Feb 2021, 03:01

Hey - I'm pretty new to all this and pretty young (8th grade) but I've had a ton of luck building a bunch of pedals from schematics on a breadboard,...

1 Replies

528 Views

Last post by az10sbum
01 Mar 2021, 06:27
BAJA AC30TB crackle at end of sustain

Last post by jhergonz « 28 Feb 2021, 01:51
Replies: 6
by nubbin89 » 03 Feb 2021, 19:56

I've recently built BAJA's awesome AC30TB OD pedal, and after finally getting it working I've encountered something strange.

I've found that when...

6 Replies

577 Views

Last post by jhergonz
28 Feb 2021, 01:51
Help me fix my WH-1 Whammy

Last post by deltafred « 14 Feb 2021, 22:37
Replies: 10
by udi9 » 12 Feb 2021, 22:34

Rating: 1.5%

Hey everyone,
Hope I'm not breaking the rules, but I hope someone can help me.
My original WH-1 Whammy was getting a little warmer than usual next to...

10 Replies

553 Views

Last post by deltafred
14 Feb 2021, 22:37
HM-Acapulco-Gold-2 Hum Noise

Last post by smileyNK « 08 Feb 2021, 07:47
Replies: 4
by smileyNK » 02 Jan 2021, 10:58

So I slammed an Acapulco Gold into an HM-2 EQ. I've built this a few times before from the same layout and had no trouble.

There is a constant low,...

4 Replies

718 Views

Last post by smileyNK
08 Feb 2021, 07:47
Boss PS-5 No output when turned on

Last post by The G « 06 Feb 2021, 11:56
Replies: 2
by GroundFox » 04 Feb 2021, 02:05

I just received a broken Super Shifter from a friend. When it is turned off my guitar signal passes through just fine except on Tremolo arm mode and...

2 Replies

212 Views

Last post by The G
06 Feb 2021, 11:56
U1226 Pedal Preamp Hiss

Last post by POTL « 03 Feb 2021, 18:35
Replies: 1
by PapaUkraine » 28 Jan 2021, 16:54

Hi, I've been working on converting the preamp and EQ sections of my Univox U1226 into a pedal form. I've worked out most of the kinks and I love the...

1 Replies

198 Views

Last post by POTL
03 Feb 2021, 18:35
Identify diode smd

Last post by Intripped « 03 Feb 2021, 11:35
Replies: 1
by 9 volt » 03 Feb 2021, 10:10

Hi there I need to identify a faulty diode. It is smd (three legs like a small transistor) and has the id 44 written on it. Does anyone know what I’d...

1 Replies

184 Views

Last post by Intripped
03 Feb 2021, 11:35

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