Hey everyone,
brand new to the forum and to pedal building and repair in general, recently picked up a Maxon 808 on the cheap because the guy had messed up the power supply and fried D5, that was easy to fix and it now powers up
my issue is that when I plug the pedal in and the switch is off I get signal through to the amp (AC15) but when I engage the pedal I get nothing
apologies if this has been asked and answered but I did some looking and couldn't find my answer
nothing appears to be blown or broken and ive attached a picture
any help would be appreciated
VOX AC15
Fender Ed Obrien strat
Ibanez Fireman Frm150
JHS Bonsai and Lucky Cat
Whammy 5
Voodoo Labs Micro Vibe
PHase 90
Union Tube and Transistor tour bender
Eventide H9 MAX
(https://i.postimg.cc/1V3wd57C/808.jpg) (https://postimg.cc/1V3wd57C)
(https://i.postimg.cc/1V3wd57C/808.jpg) (https://postimg.cc/1V3wd57C)
Welcome.
https://www.diystompboxes.com/smfforum/index.php?topic=29816.0
Hi & Welcome..
Can't see any D5 either on your PCB or any schematic available..
(https://i.imgur.com/DCMYw9e.png)
When footswitch is ON does indicator LED lights..??
If yes, measure for +9V on both ICs pin 8..
If it's OK, measure for +4.5V at both ICs pin 3..
If the above are OK, come back and report it..
(we will definately tell you to replace op-amps but wait till we'll indeed tell you that..) :icon_wink:
Quote from: antonis on July 21, 2020, 01:52:37 PM
Can't see any D5 either on your PCB or any schematic available..
Right next to the power jack.
Just labeled 1N4001 on the schematic you posted*.
*Edit: Weird that schematic has opamp in/out buffers.
Ahaaa..!!
It counts LED also for a total of 5 diodes..