Question about Roland Mc-909 Sampling Groove Box System

1 Answer

Headphone jack output

It does not have a great output connection, it krakles and i know that it needs to be resauldered, where do i go or send it to to be repaired it is a Roland MC 909 groovebox

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

The same problem here. I solved it like this:
You must open the device. There will be a PCB with outputs and inputs. You must must detach it by removing screws on outside and then disassemble the PCB from two plastic pins to get the PCB rotated (I used plice to detache it one by one) and the conections of jack socket visible. In my case one od the lanes to the hot pin was broken. I checked that with Ohm meter 'cause it wasn't clearly visible with an eye. So having the PCB more or less secured I started to clean the lane a little bit to have a chance to put the solder layer near the pin and breakage. Get some really precise soldering device. It's a precise job. Do not overheat the diode which the lanes goes to. After placing some of the solder I checked the new connection by placing a jack into the socket and Ohm meter once again. All was perfect and working after assembling. Piece of cake.


Posted on Aug 22, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2001 ford taurus air conditioer doesnt cycle with the computer but works fine with a jumper wire

check the relay(s), it may have bad contacts, there is more than one as you radiator fan should turn on when the AC clutch is activated. you'll need a VOM (Volt Ohm Meter) and a power source to check. there should be a diagram on the relay showing the pin connections for coil, common, and outputs. run continuity checks from common to outputs.

(you say it works great when jumped, so iam guessing that its not a too low or too high on freon)

Jul 08, 2012 | 2001 Ford Taurus

1 Answer

Repairing Bad Outputs - Parts, Manual, etc

The Transistors just need the code 2S added to the front of them. Grandata did have the 2SD2390 at just £2.00 plus P&P. They don't seem to have the 2SB1650, in my catalogue, but they could now (2005 catalogue).
If you get an Ohm meter (one to do this job would not be expensive) and connect it accros the transistors you will soon know if a short has occured. As it will act like you have just touch the probes together. You should replace both transistors in each channel that has failed even if only one has gone, to be on the safe side. The only thing else likely to go is bias resistors. A check with the meter will tell you if any has gone, again look for shorts where you wouldn't expect any to be.

Mar 25, 2010 | JVC RX-7030V Receiver

1 Answer

Canon ip4300 printer says paper output tray is closed. wont prin

Its a defective printer you have that cant get out of paper output tray is close or that the paper output tray is not properly placed into the printer.

Try to reseat the output tray and let me know. If it does not work, you may need to send printer to repairs.

Mar 19, 2010 | Canon PIXMA™ iP4300 InkJet Photo Printer

2 Answers

No output. power button flashing red

Its giving you a trouble code you will have to find out what that is. Try youtube. How to repair your xbox.

Nov 06, 2009 | Microsoft Xbox 360 Console

2 Answers

I have a carver M 1.5 amp rt. channel is out.

Carver designs in general are not easy to repair. I would recommend that you send this unit into a Carver authorized service center. The likely problem is the output transistors, but the driver circuits and predrivers are not simple designs and if there is a problem there, it could effect the outputs. Tracing this will require equipment and schematics that I don't believe are available on the net.


Sep 04, 2009 | Carver PM950 Amplifier

2 Answers

AC connection is no longer recognized on laptop.

Might be problem with AC jack please checkout with multi metre whether current is proceeding further or not.


Feb 17, 2009 | Toshiba Tecra M2-S630 Notebook

1 Answer

No HDMI Output thru' receiver

you most likley blew a fuse . take it to a repair shop it you live in an area that has lot's of storm activitey you might want to look in to getting serg protection on your elect panel to save repairing other thing's in your home. thank you please rate mee

Feb 12, 2009 | Pioneer Elite VSX-91TXH

1 Answer

Connect satellite receiver to dvd recordrer

there is really no way around it. Directv and Tivo are releasing a new receiver in a few months. Or you could purchase a HD dvr. Directv's receivers dont send any guide data thru a RF output, only picture and sound. The recorder you have is great for cable.

Jan 06, 2009 | Televison & Video

2 Answers

Cant find replacement parts

hi my dg4200

i need the jacket input and output correct order from left to right!

my wall mount is stuck so i can't remove my tv from the wall so i can read the inputs and output on the back of my i don't know where av input is , where audio in/output is..... a picture of someone who have a dg4200 plasma would be great.....only the back side

Oct 19, 2007 | Digimate DG4200 42 in. HD-Ready Plasma...

Not finding what you are looking for?
Roland Mc-909 Sampling Groove Box System Logo

Related Topics:

187 people viewed this question

Ask a Question

Usually answered in minutes!

Top Roland Audio Players & Recorders Experts

Greg Cann
Greg Cann

Level 3 Expert

1114 Answers

Matthew Spark
Matthew Spark

Level 3 Expert

1066 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1667 Answers

Are you a Roland Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides