Troubleshooting Problems

MP1 Classic Err 7

Started by leninvargas

Replies: 6
Views: 4,799

May 08, 2023, 12:50:40 PM
by MarshallJMP

Ground hum noise

Started by dave_daut

Replies: 5
Views: 4,918

April 08, 2014, 08:45:59 AM
by rnolan

Front panel don´t work

Started by kserri

Replies: 5
Views: 5,105

January 30, 2015, 04:21:33 AM
by rnolan

Clicks when switching presets

Started by sadky

Replies: 6
Views: 5,168

October 03, 2014, 05:47:22 AM
by Systematic Chaos

MB-1 Error Messages

Started by kawai2g4b

Replies: 2
Views: 5,198

November 29, 2013, 08:14:48 PM
by kawai2g4b

MP1 V2 (no top switch) All original excluding battery mod

Started by ScottGray

Pages1 2

Replies: 26
Views: 5,333

October 18, 2020, 11:03:11 AM
by MarshallJMP

MP1 - > Midiverb II -> UX2?

Started by Chip Roberts

Replies: 9
Views: 5,347

April 23, 2017, 04:14:44 PM
by Harley Hexxe

MP-1 Flipping Presets

Started by Griphook

Replies: 10
Views: 5,350

July 26, 2018, 11:18:15 PM
by Griphook

U.S. MP-1 Repair

Started by kfowler8

Replies: 5
Views: 5,371

September 06, 2016, 06:28:36 PM
by kfowler8

Troubleshooting hum and weird microphonics

Started by DesmoBob

Replies: 5
Views: 5,483

July 01, 2015, 05:51:55 AM
by rnolan

Very Strange Behaviour

Started by MikeB

Replies: 4
Views: 5,680

June 12, 2015, 03:21:17 PM
by MikeB

Latency with SPX90

Started by Chip Roberts

Replies: 13
Views: 5,706

July 01, 2020, 03:07:40 AM
by rnolan

Got noise???

Started by Dante

Replies: 7
Views: 5,990

January 15, 2018, 12:27:21 AM
by rabidgerry

Help with MC-1

Started by Wimbish

Replies: 12
Views: 6,639

February 01, 2018, 04:44:14 AM
by rnolan

Wrong channel comes up on my MP-1

Started by Darth Infernus

Replies: 9
Views: 6,761

May 22, 2015, 01:36:41 AM
by rnolan

Very OT: Refrigerator repair

Started by vansinn

Replies: 12
Views: 6,847

July 12, 2016, 12:50:14 PM
by vansinn

4ohm Resistor Across C131 & D38 ?

Started by red2203stack

Pages1 2

Replies: 16
Views: 7,166

January 20, 2019, 04:36:13 PM
by red2203stack

Low Volume & Unpleasant Distortion in one output channel.

Started by Auntie Ada

Replies: 9
Views: 7,314

July 29, 2015, 02:26:50 PM
by MarshallJMP

MP-1 MIDI not working

Started by niksa

Replies: 11
Views: 7,471

January 10, 2021, 06:30:02 AM
by MarshallJMP

Bass setting not saving

Started by revhed666

Replies: 14
Views: 7,574

March 31, 2014, 09:51:25 PM
by rnolan