Roland ML 2 Service Manual

Owner’s Manual

DCAC

AC & BATTERY

POWERED

FET

Thank you, and congratulations on your choice of the BOSS ML-2 Metal Core.

Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY” and
“IMPORTANT NOTES” (supplied on a separate sheet). These sections provide important in­formation concerning the proper operation of the unit.

Additionally, in order to feel assured that you have gained a good understanding of every fea­ture provided by your new unit, this manual should be read in its entirety. The manual should
be saved and kept on hand as a convenient reference.

A battery is supplied with the unit. The life of this battery may be limited, however, since
its primary purpose is to enable testing.

Copyright © 2006 BOSS CORPORATION

All rights reserved. No part of this publication may be reproduced in any form without the
written permission of BOSS CORPORATION.

2

Main Features

●

The ML-2 produces a heavy distortion with a bold attack, making it ideal for massive­sounding death-metal riffs.

●

The LOW control produces a deep, low sound, even if you don't use extreme downtuning.

●

The HIGH control lets you create guitar-riff sounds with lots of edge (attack) and a crisp
high end.

3

Panel Descriptions

fig.ML-2-name1.eps

12

3 6

4

5

4

1. AC Adaptor Jack

This jack accepts the connection of an AC
adaptor (optionally available BOSS PSA-se­ries). By using an AC adaptor, you can play
without being concerned about how much
battery power you have left.

* Use only the specified AC adaptor (PSA-

series), and make sure the line voltage at the
installation matches the input voltage specified
on the AC adaptor's body. Other AC adaptors
may use a different polarity, or be designed for
a different voltage, so their use could result in
damage, malfunction, or electric shock.

* If the AC adaptor is connected while power is

on, the power supply is drawn from the AC
adaptor.

* If there is a battery in the unit while an AC

adaptor is being used, the ML-2 will switch
over to battery-powered operation should the

Panel Descriptions

line voltage be interrupted due to a power
blackout or power cord disconnection.

2. CHECK Indicator

This indicator shows whether the effect is on
or off, and also doubles as the battery check
indicator. The indicator lights when the ef­fect is on.

* If you're powering the unit with a battery

and the CHECK indicator goes dim—or
doesn't light at all—when you try to turn the
effect on, the battery is near depletion and
should be replaced. For instructions on
changing the battery, refer to “Changing the
Battery” (p. 11).

* The CHECK indicator shows whether the

effect is being applied or not. It does not
indicate whether the power to the device
is on or not.

3. OUTPUT Jack

Connect this jack to the input of a guitar amp
or another effects processor.

4. Pedal Switch

This switch turns the effect on/off.

5. Thumbscrew

When this screw is loosened, the pedal will
open, allowing you to change the battery.

* For instructions on changing the battery,

refer to “Changing the Battery” (p. 11).

6. INPUT Jack

This jack accepts signals coming from a gui­tar or other musical instrument, or another
effects unit.

* The INPUT jack doubles as power switch.

5

Panel Descriptions

Power to the unit is turned on when you plug
into the INPUT jack; the power is turned off
when the cable is unplugged. When not using
the effects unit, be sure to disconnect the plug
from the INPUT jack.

fig.ML-2-name2.eps

87910

HIGH

LOW

DIST

7. LEVEL Knob

This knob controls the volume the effect
sound.

6

8. LOW Knob

This knob controls the tone of the effect at
lower frequencies. Tuning the knob clockwise
boosts the lower frequencies, while tuning it
counterclockwise cuts the lower frequencies.

9. HIGH Knob

This knob controls the tone of the effect at
higher frequencies. Tuning the knob clock­wise boosts the higher frequencies, empha­sizing the picking attack. Tuning the knob
counterclockwise cuts the higher frequen­cies, producing a tone in which the low-fre­quency sounds are more prominent.

10. DIST Knob

This knob controls the amount of distortion
applied to the sound. Tuning the knob clock­wise boosts the distortion effect.