Boss PH-1 Schematic

[Ripper]

I'm looking for a schematic for an old Boss PH-1 I was just given.  It isn't working at all, there is power, but no signal passes through when turned on or off.  If anyone has a schematic it would be a great help.  you can email me at mossopb@assiniboine.net
Thanks
Brent

[Andre]

Email sent

[col]

I asked for this a while back and was also sent the info for a pedal I was given. On the one I had which was displaying the same problem the op-amps had broken. I replaced them both with TL074s which got it working. I also had to adjust the trim pot inside by ear for the best effect. The wires at the top of the circuit board were very fragile and looked like they were covered in flux. I don't know if someone else had been working on it or if that was left from the original build but I had to replace two wires, I think they were orange and green. It might be worth checking those joints.
The phaser isn't fantastic, I much prefer my Nobels and Guyatone versions.

[Ripper]

Thanks for the schematic Andre.  I replaced the one 3403 with an LM324.  It solved some of the problem in that the pedal now passes signal in bypass and when the switch is turned on, which it didn't before, however it doesn't phase, even with adjustment of the pot.  I'm wondering now if I need to replace the other 3403 with a 324 so they are a matched pair.  Maybe that will be the ticket.

[Ripper]

Got it fixed, there was a halo crack in one of the joints on Q8.  Fixed that and now the pedal works great!

[Andre]

You're welcome Brent, and good for you to fix it.

André

[col]

Andre,

did you send me the schematics earlier in the year? If so I wanted to thank you but I couldn't find the original post even after searching so I posted a thanks in a different post and hope you saw it.

Col

[Andre]

Don't think so Col, I checked my sent mail, but could not find any mail to you, but thanks anyway 

André

[Ripper]

This is a great sounding pedal.  I tweaked the internal pot a little and I am really pleased with this.  thanks again Andre for the schematics.

[banjogit]

Hello,

I've got the schematic but I am still looking for the Service Manual and the Layout for the Boss PH-1.
I have got the later version with the LED indicating on/off status.
Does anybody have the documents? Would be great to receive them via mail.

Thanks a lot!

[davehughes1959@gmail.com]

New to the forum. First post. Can anyone email me a copy of the BOSS PH-1 schematic please.

davehughes1959@gmail.com.

I have been asked to repair one. It is missing a battery connection. was this removed for a good reason?

[Fender3D]

www.google.com.... just 14 keys to press...

https://www.google.it/search?q=boss+ph-1+schematic&newwindow=1&sxsrf=ALeKk03qbqpUh5NXQHW3YxjQDSF6ZGKurg:1602520648649&source=lnms&tbm=isch&sa=X&ved=2ahUKEwj5zofQvq_sAhVHsaQKHeHyAwsQ_AUoAXoECGsQAw&biw=1315&bih=838

[davehughes1959@gmail.com]

thanks Fender3D