Troubleshooting Problems

Fixing-up any old gear

Started by vansinn

Pages1 2

Replies: 15
Views: 20,432

February 15, 2017, 10:27:25 AM
by DannyjoeCarter

MP-1: What voltage do you see at front input jack?

Started by Kazinator

Replies: 8
Views: 591

December 02, 2024, 12:31:06 PM
by Harley Hexxe

MP-1 possible issues after noise mod (OD1 LED clipping at low gain)

Started by Loktite

Pages1 2 3

Replies: 38
Views: 1,353

November 05, 2024, 12:16:48 PM
by MarshallJMP

MP-1: degraded sound quality when panels open.

Started by Kazinator

Replies: 1
Views: 126

November 04, 2024, 05:05:30 AM
by rnolan

B200s hum

Started by duecemfhatchet

Pages1 2

Replies: 16
Views: 3,904

November 02, 2024, 02:35:08 AM
by duecemfhatchet

MP-1 v2.01 120hz hum and loss of drive

Started by guitarmutant

Replies: 3
Views: 215

October 27, 2024, 02:35:59 PM
by Kazinator

MP-1: Improving ripple distortion in compressor.

Started by Kazinator

Replies: 1
Views: 796

September 01, 2024, 08:53:19 PM
by Kazinator

Loud pop/click when changing to a preset with clean tube voicing

Started by RobinL

Pages1 2

Replies: 25
Views: 1,240

July 29, 2024, 11:52:44 AM
by MarshallJMP

No chorus and distorted SS voicing after noise mod

Started by Moulashaker

Pages1 2 3 ... 6

Replies: 81
Views: 2,506

July 09, 2024, 11:53:15 AM
by Gregg

No SS voicing

Started by Tweeddeluxe1

Pages1 2 3

Replies: 41
Views: 1,067

June 28, 2024, 02:46:53 AM
by rnolan

ADA MP-1 Master Gain Volume Issue

Started by charv712

Replies: 8
Views: 606

June 20, 2024, 01:13:10 PM
by MarshallJMP

MP-1 Classic Noise Gate "stuck" at max values even when turned off

Started by Bret

Replies: 5
Views: 14,973

April 24, 2024, 03:19:42 PM
by Harley Hexxe

LED Issue MP1

Started by Mojave

Replies: 4
Views: 11,437

December 31, 2023, 12:47:45 PM
by Mojave

ADA mp1 - Solid States works only

Started by gg85

Pages1 2 3

Replies: 31
Views: 12,561

October 05, 2023, 11:42:29 PM
by rnolan

MP1 Classic Err 7

Started by leninvargas

Replies: 6
Views: 8,055

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

MP-1 full refurb and restoration

Started by Systematic Chaos

Replies: 4
Views: 5,576

November 23, 2022, 07:09:05 AM
by MarshallJMP

V1.38 gain drop/loss just seconds after startup / warmup (solved)

Started by Systematic Chaos

Replies: 11
Views: 6,119

October 28, 2022, 07:26:03 PM
by rnolan

MP-1 v.2 Not editable equalizer.

Started by RVLP

Pages1 2

Replies: 15
Views: 13,733

October 28, 2022, 09:18:08 AM
by MarshallJMP

No Edit Function after replacing battery and eprom

Started by potus2028

Replies: 1
Views: 4,140

October 14, 2022, 09:30:47 PM
by rnolan

Solid State Clean Gets Nasty

Started by Moff40

Replies: 5
Views: 3,871

August 29, 2022, 09:34:51 PM
by Moff40