Roland DD 7 Service Manual
Owner’s Manual
AC & BATTERY
POWERED
FET
DCAC
Thank you, and congratulations on your choice of the BOSS DD-7 Digital Delay.
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 grasp 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 was to enable testing.
Copyright © 2008 BOSS CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the
written permission of BOSS CORPORATION.
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Main Features
●
Achieves long delay times of up to 6.4 seconds. (*1) What’s more, up to 40 seconds of
loop play—or “sound on sound”—is possible in HOLD mode.
●
Multiple delay modes include “MODULATE,” which adds a chorus effect to the delay
sound, and “ANALOG,” which models the classic BOSS DM-2 analog delay pedal.
●
Features two new stereo modes in addition to 2-in/2-out true stereo connections.
●
Provides stereo effects like “Panning” and “Effect + Direct.”
●
Parameters can be controlled using an optional expression pedal (Roland EV-5).
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The delay time can be set in realtime by pressing an optional footswitch (FS-5U) or the
built-in pedal to input the tempo.
(*1) The delay time that can be set varies according to the mode.
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Panel Description
fig.01
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2
3
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1. AC Adaptor Jack
Accepts connection of an AC Adaptor (PSAseries; optional). By using an AC Adaptor,
you can play without being concerned about
how much battery power you have left.
* If there are batteries in the unit while an AC
adaptor is being used, normal operation will
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continue should the line voltage be interrupted
(power blackout or power cord disconnection).
* Use only the specified AC adaptor (PSA-series).
* If the AC adaptor is connected while power is on,
the power supply is drawn from the AC adaptor.
2. CHECK Indicator
This is a combination indicator, which indi-
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cates whether the effect is on or off, indicates
the various functions (p. 12–20), and functions as the battery check indicator.
The indicator lights when an effect is ON.
Panel Description
* If this indicator goes dim or no longer lights
while an effect is ON, or when the functions are
indicated, the battery is near exhaustion and
should be replaced immediately. For instructions
on changing the batteries, refer to “Changing
the Battery” (p. 22).
* The CHECK indicator shows whether the effect
is on or off, and indicates the different functions.
It does not indicate whether the power to the
device is on or not.
3. OUTPUT-A (MONO) Jack
OUTPUT-B Jack
The output jacks are used to connect the unit
to an amplifier or another effects unit.
* The unit’s functions differ according to how it is
connected. Refer to “Setting the Output
Method” (p. 16).
4. INPUT-A (MONO) Jack
INPUT-B Jack
These jacks accept input signals (coming
from a guitar, some other musical instrument, or another effects unit).
* The unit’s functions differ according to how it is
connected. Refer to “Setting the Output
Method” (p. 16).
* The INPUT-A (MONO) and INPUT-B jacks
double as power switches. Power to the unit is
turned on when you plug into the INPUT-A
(MONO) or INPUT-B jack; the power is turned
off when the cable is unplugged. Be sure to
disconnect any cord plugged into the INPUT-A
(MONO) or INPUT-B jack when not using this
effects device.
5. TEMPO/EXP Jack
This jack is for connecting an optional external
footswitch (FS-5U) or an optional expression
pedal (Roland EV-5).
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Panel Description
You can make tempo settings using a footswitch or manipulate various parameters using an expression pedal.
* Refer to “Setting the Tempo Using an External
Footswitch” (p. 13), “Control Using an
Expression Pedal” (p. 20).
6. Pedal Switch
This is used for switching the effect on and
off, and for switching between the different
functions (p. 12–15).
7. 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. 22).
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fig.02
8. E.LEVEL (Effect Level) Knob
This adjusts the volume of the effect sound. Turn
the knob clockwise to increase the effect sound.
When set at the three o’clock position, the effect
is played at the same volume as the direct sound.
* When the E.LEVEL knob is set to MAX while in
REVERSE mode, only the effect sound is
output, with the effect sound at the same level as
the input sound.
Panel Description
9. F.BACK (Feedback) Knob
This adjusts the feedback level. The number
of times the delay sound is repeated increases as the knob is turned to the right.
* This cannot be used in HOLD mode.
* Oscillation may occur when the knob is set at
certain positions.
10.D.TIME (Delay Time) Knob
This adjusts the delay time. Turning the knob
clockwise lengthens the delay time.
* This cannot be used in HOLD mode.
* The delay times that can be set vary according to
the position of the MODE knob.
11. MODE Knob
This switches the delay effect.
●
Ordinary Delay
MODE Knob
3200 ms 800-3200 ms
800 ms
200 ms
50 ms
* The delay time is doubled when the DD-7 is
connected for long delay output. For more information, refer to “Long” (p. 17).
Delay Time
200-800 ms
50-200 ms
1-50 ms
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Panel Description
●
Specialized Delays
MODE Knob Delay Time
HOLD
40 sec. *1
20-800 msMODULATE
ANALOG
REVERSE
*1 In HOLD mode, the maximum recording
time is 20 seconds for stereo input or 40
seconds for monaural input.
* The delay time is doubled when the DD-7 is
connected for long delay output. For more information, refer to “Long” (p. 17).
HOLD:
This records up to 40 seconds of a performance (when using monaural input),
then plays it back repeatedly.
* For details, refer to “Using the HOLD
(Overdubbing) Function” (p. 15).
20-800 ms
300-3200 ms
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MODULATE:
This produces a pleasant chorus effect by
adding a small amount of undulations to
the effect sound.
ANALOG:
The sound changes progressively with
each repetition of the repeat sound.
This tone is modeled on the BOSS “DM-2”
Compact Delay.
REVERSE:
This delay produces an effect like playing
back a tape in reverse.
You can adjust the E.LEVEL knob setting
to get two different kinds of effect, “Effect
Sound + Direct Sound” and “Effect Sound
Only.” Turning the E.LEVEL knob completely to the right switches this to “Effect
Sound Only.”
Connections
AC Adaptor
(PSA-series: optional)
Guitar Amplifier
Footswitch
(FS-5U)
* You can obtain a variety of different delay effects by changing how the connections are made. For more
information, refer to “Setting the Output Method”(p. 16).
Keyboard
Expression Pedal
(Roland EV-5)
Electric
Guitar
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Connections
* When running the unit on battery power, inserting a plug into the INPUT-A (MONO) or INPUT-B jack
will automatically switch the unit on.
* This unit is equipped with a protection circuit. A brief interval (a few seconds) after power up is required
before the unit will operate normally.
* The use of an AC adaptor is recommended as the unit’s power consumption is relatively high. Should you
prefer to use batteries, please use the alkaline type.
* To prevent malfunction and/or damage to speakers or other devices, always turn down the volume, and
turn off the power on all devices before making any connections.
* Some connection cables contain resistors. When connection cables with resistors are used, the sound level may be
extremely low, or impossible to hear. For information on cable specifications, contact the manufacturer of the cable.
* If there are batteries in the unit while an AC adaptor is being used, normal operation will continue should
the line voltage be interrupted (power blackout or power cord disconnection).
* Once the connections have been completed (p. 9), turn on power to your various devices in the order
specified. By turning on devices in the wrong order, you risk causing malfunction and/or damage to
speakers and other devices.
When powering up: Turn on the power to your guitar amp
When powering down: Turn off the power to your guitar amp
* When operating on battery power only, the unit’s indicator will become dim when battery power gets too
low. Replace the battery as soon as possible.
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