Troubleshooting Problems

No Power, No Display, No Output

Started by Chip Roberts

Pages1 2 3

Replies: 38
Views: 16,898

December 23, 2017, 08:35:04 AM
by MarshallJMP

MP1 and Cold Exposure

Started by Chip Roberts

Replies: 2
Views: 4,271

December 10, 2017, 08:17:01 PM
by herbyguitar

MP-1- err 1 on startup

Started by tabascojunkie

Replies: 8
Views: 7,781

July 27, 2017, 03:50:00 AM
by MarshallJMP

MP-1 got Noisy...

Started by rabidgerry

Pages1 2 3

Replies: 34
Views: 17,233

July 02, 2017, 04:53:43 PM
by MarshallJMP

Viper probs, info moved from Schematics section

Started by guitardude57

Pages1 2 3

Replies: 32
Views: 15,044

June 02, 2017, 03:28:21 AM
by MarshallJMP

MP1 - > Midiverb II -> UX2?

Started by Chip Roberts

Replies: 9
Views: 5,368

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

ADA MP-1 Extreme Restoration

Started by SteveFuzz

Replies: 14
Views: 8,892

March 09, 2017, 05:24:45 AM
by Iperfungus

Help with mp1 - low distortion and "sputtering"

Started by Cstecker

Replies: 13
Views: 8,680

February 27, 2017, 03:58:07 PM
by Harley Hexxe

MB-1: Brand New Tubes, no sound on "Edge" or "Full" settings...

Started by BoWeevil2017

Replies: 1
Views: 3,336

February 21, 2017, 12:57:24 PM
by MarshallJMP

110v -> 220v

Started by Sirion

Replies: 2
Views: 3,261

January 05, 2017, 09:07:01 AM
by MarshallJMP

Ah the joys of troubleshooting

Started by Dante

Replies: 14
Views: 8,484

December 14, 2016, 01:27:26 AM
by rnolan

U.S. MP-1 Repair

Started by kfowler8

Replies: 5
Views: 5,385

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

Very OT: Refrigerator repair

Started by vansinn

Replies: 12
Views: 6,859

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

Gain drop

Started by Richie_B

Pages1 2

Replies: 17
Views: 8,976

July 12, 2016, 07:22:55 AM
by MarshallJMP

MP1 No Overdrive/Distortion

Started by Billy Penn

Pages1 2

Replies: 23
Views: 12,067

July 12, 2016, 06:38:00 AM
by rnolan

MP-1 volume drop

Started by revhed666

Pages1 2

Replies: 21
Views: 10,819

May 20, 2016, 08:24:13 AM
by Harley Hexxe

Extreme hiss and microphonic V1 tube circuitry

Started by NeverAfter

Pages1 2

Replies: 19
Views: 10,701

May 06, 2016, 10:33:18 AM
by rnolan

MOVED: Techniques and tooling

Started by rnolan

Replies: 0
Views: 3,012

April 16, 2016, 05:00:51 AM
by rnolan

MP1 Tube board issues, like am radio

Started by monty

Pages1 2

Replies: 20
Views: 13,229

January 22, 2016, 12:35:39 AM
by tomy

Microtube 200 with no output

Started by calan

Pages1 2

Replies: 15
Views: 9,946

October 30, 2015, 12:34:21 AM
by rnolan