Checking The Version Number; Restoring The Factory Settings; Test Mode - Roland Boss ME-50 Service Notes

CHECKING THE VERSION
NUMBER
• Device Settings
Turn the VR knobs (pots) completely to the left (minimum).
• Hold down the [EDIT/EXIT] switch and [WRITE] switch and turn the
POWER switch on.
Press the [FOOT 1] switch.
If the version number is Ver.1.01, the "b" (flat symbol) LED lights up, and "1"
appears in the seven-segment LED.
fig.test-4_70
RESTORING THE FACTORY
SETTINGS
• Hold down the [WRITE] switch and [
switch on.
"F" appears in the seven-segment LED.
• Press the [WRITE] switch. The BANK LED flashes.
• Press the [WRITE] switch. The seven-segment LED and BANK LED flash,
and the factory data is loaded.
The dot in the seven-segment portion lights, and Factory Reset is completed
when the unit switches to Play mode.
Never turn off the power while factory data is being loaded.

TEST MODE

Items to Have On Hand
Oscilloscope (1)
Oscillator (1)
Monitor amps (2)
Noise meters (2)
FS-5U (2)
Open plug
Measuring Equipment Settings
Oscillator
Waveform: Rectangular wave
Frequency: 400 Hz
Output Level: 50 mVp-p
Oscilloscope
TIME/DIV : 0.5 msec
VOLTS/DIV : 0.2 V
] switch and turn the POWER
Noise Meter
Filter: IHF-A (JIS-A)
Foot Switch (FS-5U)
POLARITY SW: Jack
Switching into Test Mode
• Device Settings
Turn all VR knobs (pots) completely to the left (minimum).
fig.test-2_50
• Hold down the [EDIT/EXIT] switch and [WRITE] switch and turn the
POWER switch on.
Test Categories
1.
LED Full Lighting, EEPROM Check
2.
LED Lighting Check
3.
Key SW, Pedal SW Check
4.
External SW Check
5.
VR Check
6.
EXP Pedal Check
7.
DSP Check
8.
D/A Circuitry Check
9.
DRAM Check
10. INPUT A/D Check, AUX IN Check, Noise Check
11. EXP Pedal Adjustment
Test Details
Switch to Test mode.
• Device Settings
Turn all VR knobs (pots) completely to the left (minimum).
• Hold down the [EDIT/EXIT] switch and [WRITE] switch and turn the
POWER switch on.
1. LED Full Lighting, EEPROM Check
• After the test is implemented, with data read from and written to the
EEPROM, all of the LEDs light up.
• Confirm the following.
1. All LEDS are lit.
2. No LED goes off when the unit is subjected to shock.
ME-50
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