Test Mode - Roland ME-25 Service Notes

Feb. 2010

Test Mode

Items Required
• Noise meter x 2
• Oscilloscope x 1
• Stabilized DC power supply x 1
• Oscillator x 2
• Powered monitor x 2
• 47kΩ short plug (standard monaural) x 1
• Tester x 1
• Cables for connecting the items just described
• Tool for switching the input to the INPUT jack (e.g., J-5 or the like)
• AA batteries x 6
• Computer (running Windows XP)
• USB driver for the ME-25 (obtainable from http://www.roland.co.jp)
* Install the USB driver into the computer in advance.
Entering the Test Mode
1.
Refer to the figure below and connect the measuring equipment to connectors other than the INPUT jack.
fig.connect.eps
AC Adaptor
(PSA)
2.
Turn down all controls all the way counterclockwise (minimum).
* The Test Mode does not start unless all controls have been turned all the way counterclockwise.
3.
Hold down [WRITE] and [EXTREME] and insert a plug into the INPUT jack.
* Holding down [WRITE] and [CRUNCH] by mistake and inserting the plug enters the Test Mode for factory-default inspection.
In many cases, execution proceeds unchanged for some time without this being noticed, but continuing in the Test Mode for
factory-default inspection is impossible without special tools.
The power comes on, and after a dot is displayed for approximately two seconds, the version is displayed on the 7-segment
LED display.
Power Supply
9V / 6.5V
Ammeter
PC
Driver &
Librarian
installed
STEREO
- MONO
DC IN USB PHONES
Noise Meter
Oscilloscope
(DIN AUDIO)
IN/OUT
SELEECT
L/MONO R
OUTPUT
ME-25
Monitor Speaker
47K
Signal Generator
DummyPlug
Stereo
(Mini Plug)
AUX IN INPUT
ME-25
13