Dunlop MXR M238 Iso-Brick Data Sheet

92503018757REVA

M238 ISO-BRICK

™

POWER SUPPLY

M238 ISO-BRICK

™

POWER SUPPLY

DESCRIPTION

• 10 fully isolated outputs

• Quiet, noise-free operation

• Powers a wide range of pedal
types—digital and analog,
positive and negative ground

• Variable outputs can be used to
emulate drained battery effect

CONTROLS

1

RED LED indicates bad input
power connection

2

WHITE LED indicates good
input power connection

3

POWER outputs power up
to 10 pedals

4

BLUE LEDs indicate good
output power connection

5

VOLTAGE controls set
voltage level of variable
6–15V power outputs

18V @ 2000mA power

6

input jack

POWER

The Iso-Brick Power Supply
requires an 18V regulated power
supply rated at 2000 mA, with

5.5mm x 2.1mm positive barrel,
negative center plug. The included
power adapter can utilize a wide
range of wall power, from 100–240V
at 47–63Hz. Comes with switchable
US/Japan, UK, EU, and
Australian plugs.

1

2

3

5

6

DIRECTIONS

• Connect included AC adapter into
the Iso-Brick Power Supply’s 18V
IN jack.

• Plug the AC adapter into a wall
outlet; the white power LED
will light.

• Connect up to six pedals requir­ing 9V power to the six 9V OUT
jacks using the included barrel­to-barrel cables. Be sure pedal’s
mA rating does not exceed
output’s indicated mA rating.

• Connect up to two pedals
requiring 18V power to the two
18V OUT jacks using the
included barrel-to-barrel cables.
Be sure pedal’s mA rating does
not exceed output’s indicated

4

mA rating.

• Two outputs provide controllable
voltage levels, from 6V to 15V.
Use VOLTAGE controls to adjust.
When using analog pedals requir-

ing 9V power, VOLTAGE controls
can be used to reduce power and
emulate the effect a dying battery
has on certain pedals. Note: Not
all analog pedals will operate be­low 9V. Check with manufacturer
for operable voltage range. If your
pedal is sensitive to input volt­age level, use a voltmeter to set
output voltage before connect­ing pedal. Be sure pedal’s mA
rating does not exceed output’s
indicated mA rating.

WARNING: Some pedals may
be damaged if powered using
a voltage that exceeds the level
required by the manufacturer, e.g.
powering a 9V pedal with 15V or
18V. We highly recommend stay­ing at or below manufacturer’s
state voltage requirement. Dunlop
assumes no responsibility or
liability for equipment damage
caused by misuse of the
Iso-Brick Power Supply.

CONNECTION NOTES

• Included cables use industry
standard 5.5mm x 2.1mm posi­tive barrel, negative center
polarity plugs.

• Each output features a blue LED.
When lit, this LED indicates a
good connection. If short-circuit­ed or overloaded, this LED will
turn off.

• The Iso-Brick Power Supply has
six 9V outputs: two can handle
450mA, two can handle 300mA,
and two can handle 100mA.

• Two 18V outputs can handle
250mA each.

• Two variable 6V–15V outputs can
handle 250mA each.

• All outputs may be used simulta­neously for a total power output
of 31.8 watts.

• Combining Outputs: Any output
may be combined with any other
output when stacked in series.
If combining outputs in parallel,
only outputs of the same voltage
may be used together.

• The Iso-Brick Power Supply’s
foldback current limiting circuit
(FCLC) provides ultimate protec­tion against power shorts and
overloads. Even at full load, the
Iso-Brick Power Supply operates
coolly and quietly as a fully regu­lated power supply.

TROUBLESHOOTING

The power LED fails to light.

• Dead AC outlet. Try plugging into
another outlet, or test the outlet
with another device like a lamp.

• Faulty connection. Double check
plugs to make sure they are
inserted securely.

• Short-circuited output. Discon­nect the cable from the output
whose blue LED is off. Wait 5 to

10 seconds for the unit to reset,

indicated when the blue LED
comes on.

Power provided to some effects,

but not others.

• Incompatible power plug. Check
that the dimensions and polarity
of the pedals are compatible with
the provided cables.

• Faulty cord. Check by swapping
the power cable with another
known good cable.

• Faulty jack on Iso-Brick Power
Supply. Check by plugging the
power cable into a different
DC jack.

• Faulty jack on the pedal.

Test by running the pedal off

battery power.

SPECIFICATIONS

INPUT 18V @ 2 Amps
regulated supply (positive barrel
negative center 5.5mm x 2.1mm
plug)

OUTPUTS 6-15V @ 250mA (2)

(all positive barrel negative center

5.5mm x 2.1mm)

P.O. BOX 846, BENICIA , CA 94510 U.S.A .

TEL: [phone] FAX: [phone]

18V @ 250mA (2)

9V @ 450mA (2)
9V @ 300mA (2)
9V @ 100mA (2)

DUNLOP M ANUFACTURING , INC.