ADA Depot - A Forum To Support Users of ADA Amplification Gear

Please login or register.

Login with username, password and session length
Advanced search  

News:

Lets get Technical > All Things Tube All about preamp and power amp Tubes.

Pages: 1 2 [3] 4 5 ... 7   Go Down

Author Topic: MP-1 does not change Presets correctly  (Read 32970 times)

0 Members and 1 Guest are viewing this topic.

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #30 on: Time Format »

Alright, then I will check it right this afternoon :thumb-up:
Logged

MarshallJMP

  • Superhero Member
  • ******
  • Offline Offline
  • Posts: 4702
    • marshalljmpmodshop.net
Re: MP-1 does not change Presets correctly
« Reply #31 on: Time Format »

There are 2 ways to do this

Disconnect the battery

Pull out and reseat the RAM chip.It's next to the eprom (with the white sticker) and it's usually a 5864 or 6264.Don't forget to discharge yourself ,ESD!!!
Logged

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #32 on: Time Format »

Since the Battery is soldered  :crazy: I reseated the RAM, Reloaded the Presets, tested aaaaand, still does the same Sh** :/
Logged

MarshallJMP

  • Superhero Member
  • ******
  • Offline Offline
  • Posts: 4702
    • marshalljmpmodshop.net
Re: MP-1 does not change Presets correctly
« Reply #33 on: Time Format »

What Version of eprom is in it?
Logged

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #34 on: Time Format »

It is 2.00 Maybe 2.01 would work better concerning MIDI  :dunno:
For my interest, Can You Tell me, when v2.00 was the "factory-standard"?

Anyway I'm planning to buy a few things froh your Shop, but  like a Phrase in Computer games would say: "Insufficient Funds". So I have to wait for my next money ^.^
Logged

MarshallJMP

  • Superhero Member
  • ******
  • Offline Offline
  • Posts: 4702
    • marshalljmpmodshop.net
Re: MP-1 does not change Presets correctly
« Reply #35 on: Time Format »

Well the 2.00 wasn't in production for very long.I do know that a midi dump from a V2.00 didn't work in a V2.01.
So it could solve your problem,or ...not.I can sell you one,and if it doesn't help you can ship it back.
Logged

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #36 on: Time Format »

Maybe it would help, if I post some pictures of the interior.
I got the MP1 used and with a replaced frontplate. There are real Push Buttons instead of the standard "Touch-Panel", but all other functions as Editing/Storing Presets work well so I assume this replacement hasnt any effect on the MIDI.
Maybe the pictures will bring more clarity.

I will mail pm you about the EProm and some misc-parts.
Logged

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #37 on: Time Format »

Another Question. Is it normal that the  MP1 (MIDI Channel ALL)  reacts to ControlChanges? It changes Presets when sending CC (Destination for the GMaj 2) either to Preset 1 or 128
Logged

MarshallJMP

  • Superhero Member
  • ******
  • Offline Offline
  • Posts: 4702
    • marshalljmpmodshop.net
Re: MP-1 does not change Presets correctly
« Reply #38 on: Time Format »

No that's not normall at all.It wasn't designed to recieve CC's.The only way to do this is using sysex commands.

BTW can you send some pics of the front panel,just curious what they did.Could be good for other people that have a busted switch.
Logged

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #39 on: Time Format »

Oh, that's not the answer I wanted to hear. Damnit..
My workaround for this case is: Sending the PCs for the MP1 as PC5 of the FCB. According to Documentation PC5 is sent after the CC and it seems to work.

Aaaaand I looked closely at the Display and recognized the same "Flashing"-Beahaviour as described earlier.

Attached are some Pictures of the Frontpanel and its wiring
Logged

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #40 on: Time Format »

And 2 more Pictures of the interior including a trace seeming scratched. The 6 pins on the right are the optocoupler If I'm guessing right.
Could this be an issue because it is connected to a pin of the optocoupler?
Logged

MarshallJMP

  • Superhero Member
  • ******
  • Offline Offline
  • Posts: 4702
    • marshalljmpmodshop.net
Re: MP-1 does not change Presets correctly
« Reply #41 on: Time Format »

Okay that's also a way of fixing the front panel i guess. :)

What that "blob" on Z80 processor?

It also seems there have been a lot of repairs done to your mp-1.

Don't see any pics of the opto,i think you are looking in the wrong place.See pic.
Logged

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #42 on: Time Format »

Thats just some glue. Why it is there? I dont know..
How do you know?

I took a picture of the backside. Im pretty sure it is the opto :/


Wow, thats a big picture
« Last Edit: Time Format by Griphook »
Logged

MarshallJMP

  • Superhero Member
  • ******
  • Offline Offline
  • Posts: 4702
    • marshalljmpmodshop.net
Re: MP-1 does not change Presets correctly
« Reply #43 on: Time Format »

Ok i see now,don't think that is problem,but you can alsways measure it out from pin to pin with an ohm meter.
Logged

Griphook

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
  • Less is more? More is more!
Re: MP-1 does not change Presets correctly
« Reply #44 on: Time Format »

Ok, any other obvious things that may caus any problems?

EDIT: Will check the connection asap. My Multimeter is not at my place atm :/
« Last Edit: Time Format by Griphook »
Logged
Pages: 1 2 [3] 4 5 ... 7   Go Up