Page 1
May 2002
SPECIFICATIONS.............................................................2
LOCATION OF CONTROLS,PARTS LIST ................... 3
EXPLODED VIEW,PARTS LIST ..................................... 4
PARTS LIST........................................................................5
ADJUSTMENTS ................................................................8
CIRCUIT BOARD..............................................................9
CIRCUIT DIAGRAM......................................................10
WARNING
There are three types of DD-3(T) with different circuitry called “DD-3”, “DD3A” and “DD-3B”. The pedals of all three types are labeled “DD-3”.
We call the new type of this model, DD-3B for identifying the old type and
new type for convenience on service system.
Check the model name as follows.
Of 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. SO91200 of
1912LOT (produced in August 2001). It can be identified by the serial number.
The “DD-3A” and “DD-3B” 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-3B”. Refer to “DD-3A SERVICE NOTES”
(#17059557) when repairing the DD-3A. Variable resistor, switch and
mechanical parts for the “DD-3A” and “DD-3B” are compatible. Refer to “DD2/3 SERVICE NOTES” (#17059183) when repairing the DD-3.
fig.notice
DD-3(T)
SERVICE NOTES
Third Edition
Issued by RJA
DD-3A or DD-3B
DD-3
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.
Printed in Japan (0800) (AS)17059557E3
Page 2
May 2002
SPECIFICATIONS
Power Supply
DC 9 V; Dry battery (6AM6/9V)
AC Adaptor (PSA-series: Option)
Current Draw
45 mA to 65 mA (DC 9V)
Controls
Pedal Switch
EFFECT LEVEL
FEEDBACK
DELAY TIME
MODE SELECTOR Switch
Indicator
Check Indicator (serves also as battery check indicator)
Jacks
INPUT
DIRECT OUTPUT
MAIN OUTPUT
AC Adaptor
Options
AC Adaptor PSA-Series
*0 dBu = 0.775 Vrms
System
Analog logalithmic compression and 12 bit quantizing system
Delay Time
12.5 ms (MIN) to 800 ms (MAX)
S (Short) 50 ms (12.5 ms to 50 ms)
M (Middle) 200 ms (50 ms to 200 ms)
L (Long) 800 ms (200 ms to 800 ms)
Hold Time
200 ms (MIN) to 800 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 (IHF-A, Typ.)
Input Impedance
1 M ohm
Output Load Impedance
10 k ohm or greater
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
450 g / 1 lb (including battery)
Accessories
OWNER’S MANUAL ENGLISH(#2603768702)
JAPANESE(#2603768603)
Dry Battery(#********); 6AM6/9V (Alkaline)
Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and
“Information”)
2
Page 3
LOCATION OF CONTROLS,PARTS LIST
fig.panel
DD-3(T)
No.
PART CODE PART NAME DESCRIPTION
1 2253753801 PSA CAUTION 253-538
2 2221740401 PANEL
3 22017993RT CASE
4 2247726200 KNOB (BLUE) 247-262
13279869 POTENTIOMETER RKO971110 50KB
5 13449105MF JACK HTJ-064-14I
6 2235730400 FOOT BASE (PEDAL MAT) 235-304
7 2202785100 BOTTOM COVER 202-851
8 2235730500 BOTTOM BASE 235-305
9 G253751603 BOTTOM CAUTION PSA FCC/CE/C-TICK/EMC GRY
10 13449711 AC ADAPTOR JACK HEC-0470-01-630
11 1502928100 LED (RED) L-34HDSL
12 2247726200 KNOB (BLUE) 247-262
13119308 SWITCH (ROTARY) SBM1024 (SRBM 14011A)
13 2247726200 KNOB (BLUE) 247-262
13289126 POTENTIOMETER RK0971110 10KA 15MM
14 F3449112 JACK (STEREO) HTJ-064-13D
15 13449140MF JACK (STEREO) HTJ-064-14D
16 22187547RT PEDAL
3
Page 4
May 2002
EXPLODED VIEW,PARTS LIST
fig.explo
1
1
2
a
b
3
c
4
10
d
9
8
7
6
5
[PARTS]
PART CODE PART NAME DESCRIPTION Q’TY
No.
1 13129710 SWITCH (PUSH) JM-0404 1
2 2226733300 CUSHION 267-333 1
3 F3419102 BATTERY CONNECTOR 1
4 G253751603 BOTTOM CAUTION PSA FCC/CE/C-TICK/EMC GRY 1
5 2235730500 BOTTOM BASE 235-305 1
6 2202785100 BOTTOM COVER 202-851 1
7 G2167301 INSULATION SPACER 1
8 2215770201 PEDAL GUIDE BUSH 215-702 1
9 2217710900 COIL SPRING 214-109 1
10 2235730400 FOOT BASE (PEDAL MAT) 235-304 1
[SCREW]
No. PART CODE PART NAME DESCRIPTION Q’TY
a 40125134 NYLON WASHER 3X6X0.5 2
b 40010267 SCREW M3X10 BINDING FE BZC 2
c 40010901 SCREW M3X6 BINDING B1 BZC 4
d H5029820 SCREW M3X10 THUMB SCREW 1
4
Page 5
PARTS LIST
fig.part1e
IC
DD-3(T)
SAFETY PRECAUTIONS:
The parts marked have
safety-related characteristics. Use
only listed parts for replacement.
NOTE: The parts marked # are new. (initial parts)
CASING
2235730500 BOTTOM BASE 235-305 1
2235730400 FOOT BASE (PEDAL MAT) 235-304 1
2202785100 BOTTOM COVER 202-851 1
# 22017993RT CASE 1
# 2221740401 PANEL 1
# 22187547RT PEDAL 1
KNOB,BUTTON
2247726200 KNOB (BLUE) 247-262 4
SWITCH
13119308 SBM1024 (SRBM 14011A) SWITCH (ROTARY) SW1 1
13129710 JM-0404 SWITCH (PUSH) SW2 1
JACK,EXT TERMINAL
F3449112 HTJ-064-13D JACK (STEREO) JK1 1
13449140MF HTJ-064-14D JACK (STEREO) JK2 1
13449105MF HTJ-064-14I JACK JK3 1
13449711 HEC-0470-01-630 AC ADAPTOR JACK JK4 1
CONSIDERATION ON PARTS ORDRING
When ordering any parts listed in the parts list, please specify the following items in the order sheet.
Failure to completely fill the above items with correct number and description will result in delayed or even
undelivered replacement.
QTY PART NUMBER DESCRIPTION MODEL NUMBER
Ex.10 22575241 Sharp Key C-20/50
15 2247017300 Knob (orange) DAC-15D
PWB ASSY
#
75D563P000 MT BOARD ASSY DD-3B 1
15289402 TA78L05F(TE12L) IC (REGULATOR) IC9 1
15289148 M5218AFP IC (OP AMP) IC1 1
15229875 MN51010RBA BOS-008 IC (GATE ARREY) IC7 1
02343090 M11B416256A-35J(T) IC (DRAM) IC11 1
15289118 NJM311M IC (COMPARATOR) IC5 1
# F5289115 NJM319M IC (COMPARATOR) IC10 1
# F5289113 SA571D IC (COMPANDOR) IC2 1
15159115T1 TC4066BP IC (C MOS) IC3 1
15249114T0 TC74HC00AF SOP IC IC4 1
15289155 UPC4072G2 IC IC8 1
TRANSISTOR
15319108 2SC-3324GR-TE85R TRANSISTOR Q1,Q3-Q5,Q7-Q9 7
F5329530 2SK879Y FET TRANSISTOR Q2,Q10 2
15329103T0 2SK880-GR(TE85R) FET TRANSISTOR Q6,Q11 2
DIODE
01019534 1SS355 TE-17 SWITCHING DIODE D1-D8 8
1502928100 L-34HDSL LED (RED) LED1 1
F5339201 GS1G DIODE D9 1
F5339312 RD5.6S B3 DIODE D10 1
RESISTOR
F5419705 CRN34103J RESISTOR ARRAY RA2-RA4 3
13919175 RKM14L472/942F RESISTOR ARRAY RA1 1
00567023 RPC05T 101 J MTL.FILM RESISTOR R24 1
00567156 RPC05T 102 J MTL.FILM RESISTOR R2,R26,R43 3
00567289 RPC05T 103 J MTL.FILM RESISTOR R3,R5,R10,R18-R22,R27,R36-
00567412 RPC05T 104 J MTL.FILM RESISTOR R1,R7,R23,R25,R47 5
00567556 RPC05T 105 J MTL.FILM RESISTOR R6,R60,R61 3
00567045 RPC05T 151 J MTL.FILM RESISTOR R30 1
R40,R42,R44,R45,R4
26
5
Page 6
May 2002
RESISTOR
00567178 RPC05T 152 J MTL.FILM RESISTOR R34 1
00566912 RPC05T 220 J MTL.FILM RESISTOR R70 1
00567067 RPC05T 221 J MTL.FILM RESISTOR R31 1
00567190 RPC05T 222 J MTL.FILM RESISTOR R17,R32,R35,R69 4
00567323 RPC05T 223 J MTL.FILM RESISTOR R12,R46,R48,R53,R57 5
00567456 RPC05T 224 J MTL.FILM RESISTOR R58,R62 2
00567212 RPC05T 332 J MTL.FILM RESISTOR R41 1
00567345 RPC05T 333 J MTL.FILM RESISTOR R9,R13,R14,R67,R68,R71 6
00567112 RPC05T 471 J MTL.FILM RESISTOR R29 1
00567245 RPC05T 472 J MTL.FILM RESISTOR R16 1
00567378 RPC05T 473 J MTL.FILM RESISTOR R4,R8,R11,R15,R33,R50,R56 7
00567123 RPC05T 561 J MTL.FILM RESISTOR R66 1
POTENTIOMETER
#
F5429102 RH03ADC13X 1KB TRIMMER RT1 1
# F5429103 RH03ADCS4X 47KB TRIMMER RT2 1
13289126 RK0971110 10KA 15MM POTENTIOMETER VR3 1
13279869 RKO971110 50KB POTENTIOMETER VR1,VR2 2
CAPACITOR
#
F5359811 GRM39B183K50PT CHIP CAPACITOR(1608TYPE) C39 1
13639546M0 ECEA1CKA100B 10UF/16V CHEMICAL CAPACITOR C3,C10,C36-C38 5
13639550M0 ECEA1CKA101B 100UF/16V CHEMICAL CAPACITOR C1 1
13639549M0 ECEA1CKA470B CHEMICAL CAPACITOR C11,C24,C27,C46,C56 5
13639602M0 ECEA1HKA010B UF 50V CHEMICAL CAPACITOR C43,C45,C49-C51 5
13589330M0 ECQ-P1H151JZ CHEMICAL CAPACITOR C23 1
13589319 ECQP2H471JZ CHEMICAL CAPACITOR C33 1
01674701 ECJ1VF1E104Z 0.1UF/16VK CERAMIC CAPACITOR(CHIP) C25,C26,C28,C29,C52-C55 8
01674612 ECJ1VB1H103K CERAMIC CAPACITOR C18 1
01674478 ECJ1VB1H122K CERAMIC CAPACITOR C15 1
01674523 ECJ1VB1H272K CERAMIC CAPACITOR C9,C16,C30,C40,C44 5
01674556 ECJ1VB1H472K CERAMIC CAPACITOR C2,C6,C31 3
01674578 ECJ1VB1H682K CERAMIC CAPACITOR C12,C32 2
01674689 ECJ1VF1H473Z CERAMIC CAPACITOR C5,C47,C48 3
01674334 ECUV1H101JCV CERAMIC CAPACITOR C7,C42 2
01674356 ECUV1H151JCV CERAMIC CAPACITOR C13 1
01674212 ECUV1H220JCV CERAMIC CAPACITOR C22 1
01674389 ECUV1H221JCV CERAMIC CAPACITOR C41 1
01674234 ECUV1H330JCV CERAMIC CAPACITOR C4,C8 2
01674423 ECUV1H471JCV CERAMIC CAPACITOR C35 1
01674445 ECUV1H681JCV CERAMIC CAPACITOR C20 1
13619706N0 DN1VR68KIS 0.68UF/35V CAPACITOR (TANTALUM) C14,C34 2
13589312 330P CAPACITOR C17 1
INDUCTOR,COIL,FILTER
13529145 DSS306-55FZ103N EMI FILTER EMI1 1
WIRING,CABLE
# 23477336 FLAT CABLE 4P-80X10X10 P=2.5 1
# 23477337 FLAT CABLE 3P-160X10X10 P=2.5 1
# G3477157 FLAT CABLE 3P-130X10X10 P=2.5 1
SCREWS
H5029820 SCREW M3X10 THUMB SCREW 1
H5029325 SCREW 3X6 PAN HEAD TAPTITE-2 BZC 4
H5039205 WASHER 12.5X9.5X0.5/0.9 INTERNAL TOOTH FENI 3
H5039510 NUT M9X12X2 FENI 3
H5029317UC SCREW 3X6MM BINDING TAPPING B1 FECM 1
H501941301 SCREW 3X10MM BINDING MACHINE FEBC 2
40125134 NYLON WASHER 3X6X0.5 2
H5039112 WASHER M9 3
PACKING
G2627738 INNER BOX 1
# 2260714803 PACKING CASE 1
MISCELLANEOUS
G253751603 BOTTOM CAUTION PSA FCC/CE/C-TICK/EMC GRY 1
H5319102 INSULOK TIE 80M/M T-18S 1
2226733300 CUSHION 267-333 1
2253753801 PSA CAUTION 253-538 1
2215770201 PEDAL GUIDE BUSH 215-702 1
40010267 SCREW M3X10 BINDING FE BZC 2
40010901 SCREW M3X6 BINDING BI BZC 4
6
Page 7
DD-3(T)
MISCELLANEOUS
2217710900 COIL SPRING 214-109 1
23410414 BATTERY CONNECTOR (006P) 1
22257257 EARTH TERMINAL 2
G2167301 INSULATION SPACER 1
H2369402 POLYCA PIPE M3X6X6 1
ACCESSORIES (Standard)
#
2603768603 OWNER’S MANUAL JAPANESE 1
# 2603768702 OWNER’S MANUAL ENGLISH 1
# ******** DRY BATTRY 1
7
Page 8
1.
May 2002
ADJUSTMENTS
* Adjusting the clock frequency for delay time.
Adjusting the high end of clock frequency (Adjusting the minimum delay time)
a. Set the VR3(D.TIME knob) to the min (fully-ccw).
b. Connect the oscilloscope to R26(1k ohm resister) or pin 5 (or pin 6) of IC3 (HD14066BP).
c. Adjust RT1 (1kB potentiometer) on MT BOARD for T=12.5±0.5uS(Fig.1).
In some types of products, turning the RT1 continuously clockwise may once go outside the adjustable range and reenter there.
Therefore, at the start, turn the RT1 fully counter-clockwise, then slowly turn it clockwise.
When the adjustable range is reached, stop turning it, then begin adjustment.
2.
Adjusting the high end of clock frequency (Adjusting the minimum delay time)
a. Set the VR3(D.TIME knob) to the max(fully-ccw).
b. Connect the oscilloscope to R26(1k ohm resister) or pin 5 (or pin 6) of IC3 (HD14066BP).
c. Adjust RT2 (47kB potentiometer) on MT BOARD for T=50±2uS(Fig.2).
fig.1
fig.check3
VR3(D.TIME)
25
10
R26RT1RT2
1819
20
11
12
13
1516
17
IC3
678
9
14
22
1
2
4
3
5
21
23
MAIN BOARD
View from part side
8
Page 9
CIRCUIT BOARD
fig.circit
DD-3(T)
fig.circit
View from component side
View from foil side
9
Page 10
May 2002 DD-3(T)
CIRCUIT DIAGRAM
fig.circit
+
3
R60
1M
R44
10k
A7
A6
A5
A4
A3
A2
A1
A0
R29 470
+
1 2
A9
+
R63
10k
C1
R59
D9
100/16
GS1G
1 2
+
A9
Q11
2SK880GR
1 2
R54
10k
R52
10k
1
+
5D
C29
C27
0.1
47/16
VDD73VDD
7
DQ4
DQ4
5
DQ3
DQ3
10
DQ2
DQ2
9
DQ1
DQ1
17
A7
14
A6
15
A5
16
A4
18
A3
19
A2
20
A1
21
A0
12
NRAS
6
CAS1
11
NWE
8
NOE
22p
D
5D
D5
1SS355
76
RESET
C24
47/16
GND31TIME1069TIME1170GND
D
C6
0.0047
C43
1/50
+
5D
C25
0.1
MN51010RBA
D
IC7
33
SERIALI
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
NORMSH
XI
VCOOUT
CVIN1
CVIN2
FETSW
MUTE
TIME4
TIME6
HOLD
EFSW
75
D
10k
R11
47k
Q1
2SC3324GR
30
45
13
44
12
11
43
10
42
41
40
39
38
37
36
35
34
28
84
83
82
81
25
59
63
65
26
23
9
8
7
6
5
4
3
2
1SS355
R10
10k
+
1
D3
8
C20
680p
C46
47/16
C8
33p
R14
33k
2
-
3
+
+
A9
R5
10k
2 3
12
14
RA1
RKM14L472-942F
R26
D
1k
R30
12
150
IC4C
TC74HC00AF
R27
10k
D
IC1A
M5218AFP
1
D1
1SS355
10
9
1
11
6
R7
100k
IC4D
TC74HC00AF
IC4B
TC74HC00AF
R33
47k
DQ2
C23
150pECQP
R38
10k
C31
0.0047
R6
1M
+
5D
R34
1.5k
R35
2.2k
D
+
A9
6
5
D4
1SS355
12
+
5D
R25
100k
12
13
5
4
D7
1SS355
D6
1SS355
-
+
R37
10k
1
C30
0.0027
C5
0.047
7
1
12
12
7
IC8B
uPC4072G2
R67
33k
R68
33k
R31
220
IC4E
TC74HC00AF
IC4A
3
TC74HC00AF
+
A9
Q5
2SC3324GR
2 3
R36
10k
R13
33k
+
A9
IC5
8465
NJM311M
3
-
2
+
D
D
+
5D
4
5
D
RH03ADC13X (1kB)
+
147
2
1
5D
RT1
D
R39
10k
C32
0.0068
Q2
2SK879Y
IC3C
HD14066BP
8 9
C17
1000pECQP
D
IC3B
HD14066BP
4 3
+
A9
R69
2.2k
12
IC10A
NJM319M
3
D
123
C26
0.1
D
+
5D
R23
100k
C18
0.01
D
+
A9
R42
10k
1
C35
470p
12
3
12
D2
1SS355
6
5
C33
470pECQP
R24
100
10
25
R49
Q7
10k
2SC3324GR
2 3
C39
0.018
R45
10k
+
A9
IC3E
14
HD14066BP
7
D
+
A9
Q6
3
2SK880GR
1 2
R40
10k
R32
2.2k
D
JM-0404
1025VIO
1 2
BLK
SW BOARD
(PCB G2927199 00 4/4)
R51
10k
1
C41
220p
A9
-
+
123
RH03ADCS4X (47kB)
RT2
A9
+
84
IC8C
uPC4072G2
D
+
Q9
2SC3324GR
2 3
R55
10k
R21
10k
C16
0.0027
+
A9
84
IC1C
M5218AFP
+
R9
+
33k
C34
IC2
0.68T
SA571D
1
RECT CAP1
C40
R53
0.0027
22k
R50
47k
C44
R57
0.0027
2
1
3
+
IC8A
uPC4072G2
D
+
A9
R20
Q4
2SC3324GR
2 3
R19
10k
ORG
BRN
RED
R22
10k
C12
0.0068
20
R65
10k
19
2
18
SW1A
SRBM14011
12
13
13
14 11
11
15
17
15
21
16
22
23 25
12
24
SW1B
10k
1
C15
0.0012
+
5D
19
18
13
11
17
15
16
12
R18
10k
1
1
D.TIME
VR3
RK0971110-10kA
3
+
A9
Q3
2SC3324GR
2 3
C13
150p
R16
4.7k
F.BACK E.LEVEL
MODE
VR BOARD
(PCB G2927199 00 2/4)
3
2
1
VR2
RK0971110-50kB
R56
47k
C51
1/50
C49
1/50
3
C50
2
1/50
1
VR1
RK0971110-50kB
22k
920
6
7
8
14
C37
10/16
R48
R46
22k
22k
C38
10/16
9
6
7
8
14YEL
9
10
+
A9
116
C52
0.1
D
R41
3.3k
+
A9
R71
33k
7
8
D
11 10
IC10C
NJM319M
+
A9
1 2
IC10B
NJM319M
IC3D
HD14066BP
2
3
4
5
6
7
RECT IN1
AG CELL IN1
AG CELL IN2
GND
INV. IN1
RES. R31
OUTPUT1
THD TRIM18THD TRIM2
C42
100p
IC3A
HD14066BP
R61
1M
13
R8
47k
12
D
RECT CAP2
RECT IN2
INV. IN2
RES. R32
OUTPUT2
R3
10kC20.0047
R4
47k
C4
33p
C3
R2
10/16
C10
10/16
R58
220k
1k
R1
100k
R66
D10
560
RD5.6S B3
12
R12
22k
C45
1/50
++
6
7
5
+
IC1B
M5218AFP
C14
0.68T
16
R17
15
14
+
A9
2.2k
C9
13
VCC
C7
100p
R62
220k
C48
0.047
0.0027
12
11
R15 47k
10
9
C11
47/16
Q10
2SK879Y
12
3
12
D8
1SS355
OUTPUT
1
WHT
2
4
1
JK3
HTJ-064-14I
5
ORG
12
LED1
L-34HDSL
LED BOARD
(PCB G 292719900 3/4)
CHECK
45
4
GRN
9V
Batte ry
JK1
HTJ-064-13D
INPUT
JK2
HTJ-064-14D
DIRECT
OUT
+
5D
R70
22
C56
47/16
D
3
RED
1 2
23
BRN
2
3
21
GRY
1
22
YEL
2
2
BLU
3
1
EARTH TERMINAL
EARTH TERMINAL
1 8
RA2
2 7
CRN34103J
3 6
4 5
1 8
RA3
2 7
CRN34103J
3 6
4 5
1 8
RA4
2 7
3 6
CRN34103J
4 5
DQ4
DQ3
DQ2
DQ1
D
C55
C54
C53
0.1
0.1
0.1
MAIN BOARD
(PCB G2927199 00 1/4)
D
39
DQ16
38
DQ15
37
DQ14
36
DQ13
34
DQ12
33
DQ11
32
DQ10
31
DQ9
10
DQ8
9
DQ7
8
DQ6
7
DQ5
5
DQ4
4
DQ3
3
DQ2
2
DQ1
20
VCC
6
VCC
1
VCC
40
VSS
35
VSS
21
VSS
IC11
M11B416256A-35J
D
UCAS
LCAS
JK4
HEC0470-01-630
2
1
3
AC
ADAPTOR
R64
10k
Q8
2SC3324GR
R43
1k
+
A9
IC9
TA78L05F
IN3OUT
C28
0.1
26
A8
25
A7
A7
24
A6
A6
23
A5
A5
22
A4
A4
19
A3
A3
18
A2
A2
17
A1
A1
16
A0
A0
14
RAS
28
29
13
WE
27
OE
11
NC
12
NC
15
NC
30
NC
D
EMI1
DSS306-55FZ103N
C47
0.047
+
+
A9
C36
10/16
2 3
R47
100k
1
COM
2
D D
C22
11
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