Sound Skulptor MP 5.12 Test Manual

Follow the testing procedure in the shown order. If one test fails, find out the problem, correct it then resume.
Always unplug power between steps because it is very easy to create a shortcut when moving a DMM probe. And most
of the time, shortcuts are fatal to the circuits.
Step
1.

Test setup

2.

Short circuit check

3.

Board installation

4.

General power check

5.

Positive rail check

6.

Negative rail check

7. Voltage setup with
charge
Copyright ©2013 SoundSkulptor
MP 5.12 Test guide
Description
Remove the 2 jumpers on JMP3.
Remove the DOA.
Remove the Di01 board if present and make a connection
on CN1 between the last 2 pins, near the board edge, with
a small piece of wire (a cut resistor leg will do nicely).
Do a basic short circuit check with your digital multimeter (DMM) set to Ohms :
• Between Test points GND and V+.
• Between Test points GND and V-.
In both cases you should get several kilo-Ohms. If it is not the case, find out and fix the
short before applying power.
Plug the MP512 into your 500 connector Extender , if you own one or...
Remove all other modules from you 500 rack or Lunchbox and insert the MP512 in the
leftmost slot.
Plug in power and check that the LEDs on the power supply unit are lighting normally. If
one or more LED is staying off or is lighting too low or too bright, immediately plug off
power and start checking your board.
Set your DMM to DC Volts on a 30 V scale and connect it between GND and V+. Use
test hooks and be careful not to create shortcuts.
Check that you get a positive voltage around +16V.
Connect your DMM between GND and V-.
Check that you get a negative voltage around -16V.
Plug off power.
Insert the DOA.
Plug in power. Check both voltages again.
Insert the 2 jumpers on JMP3.
Check both voltages again.
Document revision 1.1 – Last modification : 16/03/13
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