BOSS DM 2 SERVICE NOTES

Page 1

AUG.25,1982

Din-2

[53055 (am-2 SERVICE NOTES

Second Edition

APPLICABLE SERIAL NUMBERS 182000 AND ABOVE.

To keep up with latest electronic developments, Roland changes BBD to improved version. This also relieves the
factory from employing only BBDs selected among its stocks.
Although the BBD and BBD driver are incompatible with old ones, PCB assemblies are interchangeable.

Adjusting procedure and values of the first edition remain unrevised and should be referred to as necessary.

Jack SG-7615 (13449105)

CHANGE ON PARTS

Relocation of
leading-in hole.
To the top.
(P/No - same)

OLD NEW Cgmfi"
PCB 515214-510 (7521451001) ET5214A510A (7521451005) YES
(pcb 2291045801) (pcb 2291045803)

TRANSISTOR 23C945-P (15129109) 230945-13 or 25C1685-R (151291290R) YES
ZENER 1213111533 (15019547) RD11FBB (15019633) YES
BBD DRIVER MN3101 (15169504) MN3102 (15219214) NO
131313 MN3005 (152192040A) MN3205 (15219214) NO
JACK SG-7622 (13449106) SG-7615 (13449105) YES
R2 1009 3300

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ET5214-510A (7521451005) (pcb 2291045803)

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R9 .0055 3052 R11 m 10KB (:39
1 K ' OK MK BIAS 1 111017 g: 357
R! CANCEL 3! T
CIS ¥Z L 526% 1°

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|lNTENSlTV ECHO : l
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VRS

50KB REPEAT RATE
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.028 no?

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R20 c2:
1° 10x 10/15

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AC
ADAPTOR -_ --
101 : 51045560 j
102 : 511957011 51;
105 : 111113205 (4096 Stage) : -
104 : 11115102 (BBD Driver) DA . m. m
Ql-4 i giggigfi'g}? T 10071; 220710
05 : S 3 -
Q6, 7 : 2s01665-R or 23094543 ' Om (3 3
m, 2, 5: 152473 " " EFFECT Q
05 : 3175,5135;
D4 : 110115135

Page 2

JUNE 25, 1981 DWI-2 Dm-Z JUNE 25, 1981

1513055 Dm-2 SERVICE NOTES - 2T5214'?21521322 22° 232???? 2 %

. . . ADJUSTMENT
F mt Edztzon
SPECIFICATIONS CLOCK CHECK POINT: TP-l (104 pin 4) (
Power ................. Battery 9W1): AC Adapter
Current draw ............ 11mAa19V ggwer Supply
Delay time .............. 20ms ~ 300ms . .
Residual noise ............ Less than -100dBm (IHFAA) ,2 Screw 3 X 10mm 20...
|nput impedance .......... 470m T .
0 t ! load impedance ...... Over 10m .
9mm; ............ 70(W)x55(H)x125(D)mm Set V113 for 1:146Iis(6.81cHz).
Weight ................ 4509 . _
0°" 59""9N'109 (2217010900) BED BIAS CECK POINT: pcb terminal 7
. INPUT SIGNAL: OdBm 2001-12
Pedal GUIde N-702 m ' sinewave into INPUT jaCk
(2215070201) 0
m0;mm Set VRl to the point where
distortion is minimum regard-
, Case N-134(2201013400) less of R.R.ATE setting position.
Battery
Connector Strap Cover N-116 (2202011500) CLOCK LEAKAGE CANCEL CHECK IOINT:VR2 wiper
Base N-305 (2235030500) IN M
Bottom, not shown , A [A
Q . . IIU'M- --) IA- )001 I
Jack HEC-0749-1-1 (13449704) LED 5112-1353 (15029117) "
Turn VR2 to converge two outputs so that
__.- K , clock component is minimum at output pin
. O with no input signal fed.
Pot-VM10AS15 114303229512) 0- 05 Pot.VM1OAS15 50KB(13229513)
Knob TK-1122 (2247010500) . C2 . _
REFEAT RNTENSITY
an: - __ Knob TK-1140 (2247012500)
Jack 56-7622 (13449106) *°""T PUT"
I,

Pedal N-520 (2218052000) .-

Jack SG-7713 (13449104)

*0 Base N-304 (2235030400)

I03 [CL

PARTS LIST 1': 1:21;: °Z
SEMICONDUCTOR I
2201013400 Case N-134 15139101 ZSK5OA(TM)-Y FET I RIB {
2218052000 Pedal N-520 15129108 2SC945-P transistor Ethel: We w" m
2202011600 Cover N-116 bottom 15129104 2SC732TM-GR transistor 3121?? 0.04ch 05°
2235030500 Base N-305 bottom 15019103 182475 diode K _-__
2235030400 Base N-304 pedal matt 15019526 RD5.6EB-3 zener IINTENSXTV ECHO E as
2215070201 Guide bushing N-702 15019547 RDllEB-5 zener cu *5 l , vns ' ME
I . 12/501 025 5m REPEAT RATE
2226030500 Cushion N-305 pcb 15029117 SUP-135B LED R m 04 v. n F3291. __
2216050200 Spacer N-502 pcb 15189105 [1113045580 BP MON Dual op amp wk m1 Pu], 2e; L 1 W
. , ' I
2217010900 Spring 0011 121-109 15219108 NE370N compander L30 , 2 ci'a '
2247010500 Knob 1101122 15169504 14113101 BBD driver 602;; Izozkai 3% §: 5723 93ng ourpm
/
2247012500 Knob TK-ll40 15219204011 M13005 BBD 4096 stages (F
2 J_ green dotted selected for specified gain
13129710 Sw1tch M0404 at lower supffly (down to 8V). Non-selected
substitute should be checked for output A-
PCB
level, powered by aged battery. AC
7521451001 ET5214-510 assy (pcb 2291045801) ' ADAPTOR
2291049600 LED mounting,less parts SOCKET m 1 . 10045580 1
13429502 ICC03-014-35OT BBD : 7
POTENTIOMETER IC 2 . 11157011 I 22
l 22 12 VM S 13449104 SG-7713 IC 3 : 1411308; (Selected) '04- I
3 95 10A 15 MB 13449105 30-7622 IC lfl : W3 _ ' 7 3 -
13229513 71110115315 50KB Q 1 LI . 2507321314 GR Icons 120/10 icon
13449704 HEC-O749-l-l AC adaptor 0 5 : ZSK30ATM-Y -
being identical with 11300517 on elder models Q 6 , 7 = 25C945-P _ __ __ EFFECT :
in the family, shares the same part code,but D 1.25 1 1521173
finish is matted. D 3 : RD5.6EB3
D 1+ : RDllEBB

@Roland 1