BOSS DD 3T SERVICE NOTES 3rd
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Extracted text from BOSS DD 3T SERVICE NOTES 3rd (Ocr-read)
Page 1
May 2002
DD-3(T)
@BUSSDD_3 T
Digital Delay
SPECIFICATIONS ...........................................
LOCATION OF CONTROLS,PARTS LIST ..
EXPLODED VIEW,PARTS LIST
PARTS LIST ..................................
ADJUSTMENTS
CIRCUIT BOARD. ..
CIRCUIT DIAGRAM .................................................... 1
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WARNING
There are three types of DD-3(T) with different circuitry called DD-3, DD-
3A and DD-38. The pedals of all three types are labeled DD-3.
We call the new type of this model, 1313-33 for identifying the old type and
new type for convenience on service system.
Check the model name as follows.
0f the three types, only the appearance of the "DD-3 is different. Identify the
DD-3 or the DD-3A or DD-3B by the shape of the adapter jack as shown in
the following figure.
The appearance of the DD-3A and the DD-3B are the same. Due to a
DRAM change, it has been changed to DD-3B from serial No. 3091on of
1912LOT (produced in August 2001). It can be identified by the serial number.
The DD-3A and "DD-33 can also be identified by the silk-screen printing
on the board.
When referring to the service notes or ordering parts, check the model name
using the above process.
This service note is for the DD-SB. Refer to DD-3A SERVICE NOTES
(7059557) when repairing the DD-3A. Variable resistor, switch and
mechanical parts for the "DD-3A and DD-3B are compatible. Refer to DD-
2/3 SERVICE NOTES (#17059183) when repairing the DD-3.
ID WE]
DD-3A or DD-3B DD-3
SERVICE NOTES
Third Edition
Issued by RJA
CHECK L. BOOms HOLD
E.LEVEL F.BACK
MIN MAX MIN MAX
(- OUTPUT INPUT(-
DIRECT OUT-)
Digital Delay
00-3
[EIIBDSS
Copyright © 2002 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of ROLAND CORPORATION.
Roland 1705955753
Printed in Japan (0800) (AS)
Page 2
May 2002
SPECIFICATIONS Options
AC Adaptor ISA-Series
Power Supply * 0am = 0.775 vas
DC 9 v; Dry battery (6AM6/9V)
AC Adaptor (PSA-series: oplion)
Current Draw
45 mA to 65 mA (DC 9V)
Controls
Pedal Switch
EFFECT LEVEL
FEEDBACK
DELAY TIME
MODE SELECTOR Switch
In d icator
Check Indicator (serves also as battery check indicator)
Jacks
INPUT
DIRECT OUTPUT
MAIN OUTPUT
AC Adaptor
System
Analog logalithmic compression and 12 bit quantizing system
Delay Time
12.5 ms (MIN) to 800 ms (MAX)
5 (Short) 50 ms (12.5 ms to 50 ms)
M (Middle) 200 ms (50 ms to 200 ms)
L (Long) 800 ms (201] Ins to 800 ms)
Hold Time
200 ms (MIN) to we ms (MAX) in Hold mode
Frequency Response
Delay Sound: 40 Hz to 7 kHz; +1/-3 dB
Direct Sound: 10 Hz to 60 kHz; +1/-3 dB
Residual Noise
.95 dBu (IHE-A, Typ.)
Input Impedance
1 Mohnl
Output Load Impedance
10 k OhIn or greater
Dimensions
73 (W) x 129 (D) x 59 (H) mm
2-7/8 (W) x 5-1 /s (D) x 2-3/3 (H) Inches
Weight
450 g / 1 lb (including battery)
Accessories
OWNERS MANUAL ENGLISH(#26(13768702)
]APANESE(#2603768603)
Dry Battery(#""""); 6AM6/9V (Alkaline)
Leaflet (USING THE UNIT SAFELY, IMPORTANT NOTES, and
Information)
2