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BOSS
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DD-7
Service Manual
24 pgs1.52 Mb0
User Manual [ru]
32 pgs994.19 Kb0
Table of contents
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BOSS DD-7 Service Manual

May. 2008 DD-7
SERVICE NOTES
Issued by RJA

Table of Contents

Main Specifications ...........................................................3
Location of Controls .........................................................4
Location of Controls Parts List........................................4
Exploded View Parts List.................................................5
Parts List .............................................................................6
Verifying the Version Number........................................8
Performing a Factory Reset..............................................8
Updating the System ........................................................8
Test Mode ...........................................................................9
Circuit Board (Main Board) ...........................................17
Circuit Diagram (Main Board: Analog) .......................18
Circuit Diagram (Main Board: Digital) ........................20
Copyright © 2008 Roland Corporation
All rights reserved. No part of this publication may be reproduced in any form without the written permission of Roland Cororation.
Printed in Japan (0290) (CC-KWS)17058564E0
May. 2008 DD-7

Cautionary Notes

Before beginning the procedure, please read through this document. The matters described may differ according to the model.
No User Data
This product cannot save user data. Backing up user data during servicing is not required.
Parts List
A component whose part code is ******** cannot be supplied as a service part because one of the following reasons applies.
• Because it is supplied as an assembled part (under a different part code).
• Because a number of circuit boards are grouped together and supplied as a single circuit board (under a different part code).
• Because supply is prohibited due to copyright restrictions.
• Because reissuance is restricted.
• Because the part is made to order (at current market price).
Circuit Diagram
In the circuit diagram, “NIU” is an abbreviation for “Not in Use,” and “UnPop” is an abbreviation for “Unpopulated.” They both mean non-mounted components. The circuit board and circuit board diagram show silk-screened indications, but no components are mounted.
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May. 2008 DD-7

Main Specifications

DD-7: Digital Delay
Nominal Input Level
-20 dBu
Input Impedance
1 MΩ
Nominal Output Level
- 20 dBu
Output Impedance
1 kΩ
Recommended Load Impedance
10 kΩ or greater
Delay Time
1 ms to 6400 ms
* Values may vary according to the mode and connections.
Maximum Recording Time
40 seconds (in HOLD mode)
Dimensions
73 (W) x 129 (D) x 59 (H) mm
2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
Weight
440 g / 1 lb (including battery)
Accessories
Owner’s Manual English (#G2507366R0)
Mode Sticker (#G2547154R0)
Application Sticker (#G2547160R0)
Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”) (#********)
Dry battery/9 V type (6LR61) (#********)
* The battery that was supplied with the unit is for temporary use-intended
primarily for testing the unit’s operation.
We suggest replacing this with an alkaline dry cell.
Options
AC adaptor (PSA-series)
Controls
Pedal switch
E.LEVEL knob, F.BACK knob, D.TIME knob, MODE knob
Indicator
CHECK indicator
(Used for indication of TEMPO, HOLD, and to check battery)
Connectors
INPUT-A (MONO) jack, INPUT-B jack
OUTPUT-A (MONO) jack, OUTPUT-B jack
TEMPO/EXP jack, AC adaptor jack (DC 9 V)
Power Supply
DC 9 V:
Dry battery 6F22 (9 V) type (carbon)
Dry battery 6LR61 (9 V) type (alkaline)
AC Adaptor (PSA-series: optional)
Current Draw
55 mA (DC 9 V)
Expected battery life under continuous use:
Carbon: 1.5 hours
Alkaline: 6 hours
* These figures will vary depending on the actual conditions of use.
* 0 dBu = 0.775 Vrms
* In the interest of product improvement, the specifications and/or appearance of
this unit are subject to change without prior notice.
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May. 2008 DD-7

Location of Controls

fig.panel.eps

Location of Controls Parts List

No. Part Code Part Name Description Q’ty
1 75E593C0R0 CASE 1 2 G2537516R0 PSA CAUTION CE 9V N225 1 3 13449717 ADAPTOR JACK HEC2392-01-150 1 4 F5029423R0 LED L-3VEGW 1 5 G2477127R0 ROUND KNOB D-CUT (BLUE/BLACK) 3
F3279852R0 POTENTIOMETER RD901-20-15FW-B54-006 3
6 G2477127R0 ROUND KNOB D-CUT (BLUE/BLACK) 1
F3229206R0 POTENTIOMETER RD901-20-15FW-B50K-08Q7 8CLIC 1 7 F3449150R0 JACK (STEREO+SW) 2LJ-650NHW00 2 8 03344701 6.5MM JACK HTJ-064-12DS 1 9 13449140R0 JACK(STEREO) HTJ-064-14D 2 10 75E592T0R0 PEDAL 1 11 22357304R0 PEDAL PLATE 1 12 G2217798R0 PANEL PLATE 1 13 40125101 THUMB SCREW M3X10 FE ZC 1
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May. 2008 DD-7

Exploded View

fig.bunkai.eps
10
b
11
a
a
7
6
b
d
2
12
1
9
5
3
4
c
8

Exploded View Parts List

No. Part Code Part Name Description Q’ty
1 13129710R0 SWITCH(PUSH) JM-0404 1 2 22267333R0 CUSHION 1 3 F3419102R0 BATTERY CONNECTOR 006P BATTERY SNAP 1 4 G2537516R0 PSA CAUTION CE 9V N225 1 5 22357305R0 BOTTOM BASE 1 6 22027851R0 BOTTOM COVER 1 7 G2167301R0 INSULATING SHEET 1 8 22157702R0 PEDAL GUIDE BUSH 1 9 22177109R0 COIL SPRING 1 10 22357304R0 PEDAL PLATE 1 11 75E592T0R0 PEDAL 1 12 75E593C0R0 CASE 1
a 40125134 NYLON WASHER 3X6X0.5 2 b H5019413R0 SCREW M3X10 BINDING MACHINE FEBC 2 c H5029325R0 SCREW 3X6 B1FEBC 4 d 40125101 THUMB SCREW M3X10 FE ZC 1
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May. 2008 DD-7

Parts List

fig.-part1-e.eps
SAFETY PRECAUTIONS:
The parts marked have safety-related characteristics. Use only listed parts for replacement.
NOTE: The parts marked # are new. (initial parts)
CASING
# 75E593C0R0 CASE 1 # G2217798R0 PANEL PLATE 1 # 75E592T0R0 PEDAL 1
KNOB, BUTTON
# G2477127R0 ROUND KNOB D-CUT (BLUE/BLACK) 4
JACK, EXT TERMINAL
# F3449150R0 JACK (STEREO+SW) 2LJ-650NHW00 2
SWITCH
22357305R0 BOTTOM BASE 1 22027851R0 BOTTOM COVER 1
22357304R0 PEDAL PLATE 1
03344701 6.5MM JACK HTJ-064-12DS 1
13449140R0 JACK (STEREO) HTJ-064-14D 2 13449717 ADAPTOR JACK HEC2392-01-150 1
13129710R0 SWITCH(PUSH) JM-0404 1
Due to one or more of the following reasons, parts with parts code ******** cannot be supplied as service parts.
• Part supplied only as a component in a complete assembly
• Copyright does not permit the part to be supplied
• Part is sold commercially
The description "Q'TY" means a necessary number of the parts per one product.
PWB ASSY
# 75E593P0R1 MAIN SHEET ASSY 1
* This unit includes the following parts.
******** MAIN BOARD ******** VR BOARD ******** INPUT BOARD ******** CTL BOARD ******** LED BOARD
DIODE
F5029423R0 LED L-3VEGW 1
RESISTOR
F5399101R0 MTL.FILM RESISTOR 0J (1608TYPE) 12
# F5429516R0 MTL.FILM RESISTOR 1R0 J(1608TYPE) 12
POTENTIOMETER
F3279852R0 POTENTIOMETER RD901-20-15FW-B54-006 3
# F3229206R0 POTENTIOMETER RD901-20-15FW-B50K-08Q7
8CLIC
CONNECTOR
F3419102R0 BATTERY CONNECTOR 006P BATTERY SNAP 1
WIRING, CABLE
# F3487015R0 WIRING YELLOW 110X6EX6E (EXP) 1
H4009408R0 WIRING 1007 WHITE 85X6X3 1
# F3477063R0 WIRING RIBBON CABLE 6P X80MM 1
H4009498R1 WIRING 1P VIOLET L=160MM 1
# H4009305R0 WIRING ORANGE 100X3X6 (OUTPUT) 1
F3467053R0 WIRING 1007-26X3P L=65MM CONNECT X 1 1
# H4009610R0 WIRING GREY 100X3X6 (OUTPUT) 1
H4009499R1 WIRING 1P GREEN L=160MM 1
H4009597R0 WIRING 1007 BROWN 105X6X3 1 # H4009458R0 WIRING BLACK 45X6X6 (INPUT) 1 # F3467058R1 INPUT WIRING BOARD IN CONNECTOR 1
1
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May. 2008 DD-7
SCREWS
# G2137403R0 WASHER HALF MOON SHAPE 1
PACKING
# G2627793R0 PACKING CASE 1
MISCELLANEOUS
ACCESSORIES (Standard)
# G6017474R0 OWNER’S MANUAL JAPANESE 1 # G2507366R0 OWNER’S MANUAL ENGLISH 1 # G2547154R0 MODE LABEL 1 # G2547160R0 APPLICATION LABEL 1
H5039158R0 WASHER M9X14X0.5T NI 5
40125101 THUMB SCREW M3X10 FE ZC 1
40125134 NYLON WASHER 3X6X0.5 2
22137709R0 WASHER 9.6X14X1.0 1
H5019413R0 SCREW M3X10 BINDING MACHINE FEBC 2
H5029325R0 SCREW 3X6 B1FEBC 5
H5039205R0 TOOTH WASHER 9.1X13 5
H5039510R0 NUT M9X12X2T NI 5
H5039521R0 NUT M7 4
G2627738R0 INNER BOX 1
H2369451R0 LED SPACER LEDH-5 5MM 3P 1
G2537516R0 PSA CAUTION CE 9V N225 1
22177109R0 COIL SPRING 1
22267333R0 CUSHION 1
G2167301R0 INSULATING SHEET 1
22157702R0 PEDAL GUIDE BUSH 1
22257257R0 EARTH TERMINAL 2
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May. 2008 DD-7

Verifying the Version Number

1. Connect an AC adaptor.
2. Turn down all controls all the way counterclockwise.
3. Holding down the foot pedal and inserting a plug into the INPUT jack
makes the CHECK LED light up.
* Continue holding down the pedal until the LED goes dark.
After approximately 2 seconds, the CHECK LED goes dark.
* The CPU and DSP checks are performed before the LED goes dark as just
described. If a problem is found in the CPU, DSP, or the like, the LED may not go out.
After approximately 1 second the CHECK LED flashes, and the number of flashes indicates the version.
1 flash: Ver. 1.00
2 flashes: Ver. 1.01
3 flashes: Ver. 1.02
4. After the version display, execution shifts to the Test Mode.

Performing a Factory Reset

This product has no factory-reset feature.

Updating the System

A system update cannot be performed for this product. If an update is required, replace with an updated circuit board.
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