Boss SE 50 Stereo Effects Processor Service Manual

Page 1

Jul. 1991

*This notes includes the contents of the SE-50 First Edition
and makes it obsolate.

Having undergone minor modifications, the new SE - 50 is
different from the old one in sharp.

The new SEv 50 will be hereinafter referred as the "SE- 50A"
and the old SE - 50 as the SE - 50.

It should be noted that some parts are not compatible between
the "SE - 50" and "SE - 50". (For more information, see
"Differences between SE-50A and SE-50(P.1).)

DBDSS SE-5U

STEREO EFFECTS

PROCESSOR ERRATA &SLPPLE|VENl' is attached at the end of the page. 0

SE- 50

SERVICE NOTES

Second Edition

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rSE-soJ thfigfiéfiafibido

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Both the old and new products are marked "SE- 50" on their 1:3le )
panels. flfiwblb7I-ZIXL 394 7.6%?54 7:6 FSE~50J éflflfié
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SE - 50 SE- 50A
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+ < Rear View >

TABLE OF CONTENTS

SPECIFICATIONS
DIFFERENCES BETWEEN SE-SOA and SE-50

+ < Rear View >
Fig.1 HZI

535E

Iirfi ......
SE-SOA t SE-50 ¢¢DJ§U

-SE-50A (New Type) -

PANEL
EXPLODED VIEW

PARTS LIST

BLOCK DIAGRAM

CIRCUIT BOARD (MAIN)

CIRCUIT DIAGRAM (DIGITAL/ANALOG)
CIRCUIT BOARD (sw)

CIRCUIT DIAGRAM (sw)

lC DATA

CHANGE INFORMATION

SE-SOA/trmvl -
SE-SOAREQE
SE-50AI\'-J'JX I ~-
SE-50A7EI-y7l2-
atrial (x4 u) ------
151B- (7199}l1/77'El 7)
Etfilfil (sw)
Emil (SW)-
|C?-5
fiifil] ....... ......

-SE-50 (Old Type) -

PANEL
EXPLODED VIEW

PARTS LIST

BLOCK DIAGRAM

CIRCUIT DIAGRAM (MAIN)
CIRCUIT BOARD (MAIN)
CIRCUIT BOARD (DIGITAL)
CIRCUIT DIAGRAM (DIGITAL)
CIRCUIT BOARD (3w)
CIRCUIT DIAGRAM (sw)

IC DATA

CHANGE INFORMATION

SE"50l\°*/IIEI
SE'SOfifigg
SE'50/\"~YUXI
SE-507El'y7
[EE- (>4 V)
EWIE (X4 V)
EWE (DIGITAL)

15135er (DIGITAL) ~17
etae (sw)- ~18
1513a- (sw)~ -~l8
m5~9

-SE-50A, SE-SO (Common) -

TEST MODE

DATA SAVE AND LOAD

LOADING THE FACTORY PRESET DATA
IDENTIFYING THE VERSION NUMBER
APPENDIX

ERROR MESSAGES

@Roland 17059480

7-1 b{_ F ...................
¥-&®t-7 777 I~ u-dutzy I~--F-9rDI:I- F
N-vaufyfi~®fi%fi%
Wei

15_)(.y+_,_:j ........................................................ 26

Printed in Japan (DP) BAOO l

SPECIFICATIONS/EB?

[ELECTRICAL CHARACTERISTICS/iSWfiIflE]

Rated Input Level/EH10) lzNJl' ------- ~: - 20dBm/+ 4dBm
lmput Impedance/A774 D l:'- 971 1M Q

Input Gain/4 97w 1* - frf J ------- -20dB to +12dB
Reted Output Level/$135517: l/NIII ~ 20dBm/+ 4dBm

More than 50k Q/50k QLLIJ:
~:20Hz to ZOkHI (+0/r- 3dB)
useing Sampling Frequency/Emflyju ydlflififit : 48kHz
20Hz to 15kHz (+0/ 3dB)
useing Sampling Frequency/{imfl'vju ydlfliflfit : 32kHz

Output Load Impedance/Hijafiifi4 J l:' - fly}
Frequency Response/liliflifitfikt ~~~~~~~~~~~~~~~~~~~~~~~~~

Sampling Frequency/t? 17 U Vilfiififit ~~~~~~~~~~~~~~~~~~~~~~~ :48kHz/32kHz (set every algorithm)
(7»:1 U IAICJ: J Ellltilth)
Residual Noise/HE! 4 X ----------------------------------------- : Less than - 95dBm (lHF-A) / - 95dBmLLIT (lHF-A)

(LEVEL Switch : - 20dBm, THRU)
[PATCH MEMORY, A/ D, D/ A CONVERTER]
Patch Memories/X E 'J a ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ : User's Memories : 100
Preset Memories : 28
-: 16bit Linear

A/D Converter '
~216bit Linear

D/A Convertor
[Display]
Display ...................................................................... :16-Ietter. 2~|ine LCD (back lit)
LCD 161'-r>< 21'? (/\~y7llfiafilftl§)
[OTHERS]
Power/i195 '12V AC (BOSS BRB~100, 120, 220, 240E, 240A)
Current Draw/Slain .1A
Dimensions ---------- -:218 (W) X44 (H) X238 (D) mm
8-5/8 (W) X1-3/4 (H) x9-3/8 (D) inches
Weight ....................................................................... :1.5kg / 3 lb 5 oz. (SE- 50A)
1.6kg / 3 lb 9 oz. (SE-50)
Accessories ............................................................... ; AAC Adaptor
BBB-100 (100V) : PNo.12449616
BRB-120 (120V) : PNo.12449617
BRB-220 (220V) : PNo.12449618
BRB-24OA (240VA) : PNo.12449620
BRB-24OE (240VE) : PNO.12449619
Rubber Foot (PNo.2235012000) (X4Dcs)
Owners Manual (English) :PNo.2604024200
Owner's Manual (Japanese) : PNO.2604024100
Options -:Rack Mount Adaptor RAD-50

71: 5 ea 7'3 J I- ~ 7575 RAD~10ICIIEIZITIfszi51E§ttAIo
Foot Switch FS-5L, FS-SU
Insert cable PCS-31

0dBm= 0.775Vrms

DIFFERENCES BETWEEN SE-50A SE - 50A & SE - 50 <:. (DEL

and SE - 50

SE 50 SE- 50A

Change in parts
EBEHEE

Bottom Chassis PNo. 2281075700 PNo. 2281082100

Digital Board PNo. 7316053000 $83

Main Board PNo. 7316054000 PNo. 7316551000
Sw Board PNo. 7316055000 PNo. 7316554000
Display Unit (LCD Assy) PNo. 15029500 PNo. 15029540

* Note that both SE7 50A and SE-50 are marked SE-50 on their panels.

* SE-SOA 55-50085 1, e/x'swfioinum SE-50" r; taro '(l. 15W)? iii LT < 7:"
8w,

*Look at the position of screw at MIDI Jack on the back panel for making a distinction
between SE-5O and SE-SOA. (reference fig.1)

* SE-SO & SE-SOA éfifili'élzlm /\-y 7 - $1140 MlDl Jacka) Exmlfiléfilfil: L'C <
fiat» (Fig.1 $1.8)

Differentiation and Caution
ifilfi'it iii

copyright © 1991 by ROLAND CORPORATION

Page 2

SE-SO

SE-SDA (New Type)

PANEL/1W Ibl
LCD Cover
(220401 5200)
_ LCD Assv
LED Guide DMO45Y-7BL7
(221 3062700) (15029540)
LED

GL3PR8 (red)
(15029281)

< Front \fiew >

Round Knob (Outer)

Rack Keytop (S) 1P
(2249024400)

Switch (Tact)

SKHVAF

(13129744) Front Panel

Rack Keytop (S) 2P

(2222040700)

v NuMEEn A

AMETERL V VALUE

Button (L)
(2249059500)
Button Guide
(221 3062800)
Switch

SPU N 1 9430A

(or SPUN19F)
Rack KeytOD (D) 1P (13129369)

(22480221 00) (2249521 000) (2249520500)
Round Knob (SS) Switch (Tact) Switch (Tact)
(2248022000) SKHVAF SKHVAF
pot. (13129744) (131 29744)
PK0972210 250kA X 2 LED
(13289106) GL5PR42 (red)
(15029364)
DIN Socket (MIDI) Jack Switch (Slide) Top Cover
YKF51 - 5048 HLJ0544- 01 - 010 SSSF 2-1 (2202050600)
(13429676) (13449150) (13159171)
< Rear View >
@ Le *
ACADAPVOR GD 6}! Enter w gen Z""""_'_'6iirvifi_ l: :L _Wur._ l
O asuorz s. v n MONO! Am, a UMONOI E
2?. .3 I -z u g
0 m @ @ l
a.) W W of "Ti Lapse 5550 "mas s}? iii Féioctsson ' ' o,

Jack (for AC Adaptor
HEC0740- O1- 010
(13449728)

J .

Jack

HLJ0544- 01-110
(13449155)

Bottom Chassis
(2281082100)

EXPLODED VIEw/fififilfl

-Noi- -PART$- PARTS No.-

® Front Panel ~~ ' 2222040700
® Knob (SS) .. 2248022000
© Knob (Outer) -~ 2248022100
@ Button (L) 2249059500
(53 Button Guide ~- 2213062800
© Rack Kaytop (D) 1P 2249520500
® Rack Keytop (s) 2PM 2249521000
Rack Keytop (s) 1P ~ 2249524400
© LED Guide -- 3213062700
® LCD Cover ~ 2204015200
® Spacer (for LCD) 2226024300
® LCD Assy DMO45Y-7BL7 15029540
® VR Holder ......................... 2220047500
® VR Board (pcb 2293021800 2/3) um:
® SW Board (pcb 2293021800 1/3) 7316554000
® Front Chassis 2281075800
® Bottom Chassis ~- 2281082100
LED Board (pcb 2293021800 3/3) but"
® MAIN Board (pcb 2293020700) - .7316551000
@ Jack Holder ................................ 2220049500
® Lithium Battery CR2032-1HS 3V 12569410
@ TOD COVeT ................................... 2202050600
{9 Rubber Cushion 10 X 10 X 4mm .. 2226028200

NOTE: Replacement Parts No.14,18 are supplied as SW BOARD.
ii : anemia. No_14.18 lit sw BOARD a LCflttezshzao

-$CREW~

@eeeeeooooeao

3 X6mm Binding Head Tap-tiget (self-tapping) w/ internal tooth washer 5 type FeBCX6

3 X 10mm Binding Head Tap-tight (self- tapping) P type FeBC X 2
3 X6mm Binding Head Tap-tight (self-tapping) 8 type Feme 3
3X8mm Bainding Head Tap-tight (self-tapping) 5 type FeCm X3
3 X6mm Bainding Head Tap-tight (self»tapping) 5 type FeBC X1
Nylon Revet NRP-345 X 3

2 X 5mm Pan Head FeNi w/Spring Washer X 2

3X6mm Flat Head Tap-tight (Self-tapping) 5 type FeBCX4
Jack Nat M9 X 12 X 2Pt75 FeNi X 6

Jack Washer 9.2 X 14 X 0.5 FeNi X 6

M91 X 13 Internal Tooth Washer X 6

3 X6mm Binding Head Tap-tight (self-tapping) w/internal tooth washer 8 type FeCm X3

Top Cover removal screws.
i :77 ' bit-0*:Jé5l-Li?o

a X Spas (3 X 6mm Binding Head Tap-tiget (self-tapping) w/ internal tooth washer 8 type FeBC X 6)

Jul.

1991