Roland A-33 SERVICE MANUAL

Page 1
SERVICE NO TES
First Ed ition
MIDI KEYBOARD CONTROLLER lssued by RES
TABLE OF CONTENTS
SPECIFICATIONS
DISASSEMBLY
LOCATION OF CONTROLS
EXPLODED VIEW 1
EXPLODED VIEW 2
KEYBOARD PARTS LIST & KEY DISASSEMBLY
BLOCK DIAGRAM
RESTORING THE FACTORY PRESET/TRANSLATION FR
POWER SUPPLY PCB ASSY & CIRCUIT DIAGRAM (PO
JACK PCB ASSY & CIRCUIT DIAGRAM (JACK BOARD
CPU PCB ASSY
CIRCUIT DIAGRAM (CPU BOARD)
RIGHT CONTACT PCB ASSY */RUBBER CONTACT
(or RIGHT CONTACT BOARD */RUBBER CONTACT
(or LEFT CONTACT BOARD */RUBBER CONTACT)
OM ENGLISH INTO
WER SUPP. & AMP
)
)
JAPA
BOAR
Page
1
2
3
4
4
5
0)
6
6
7
8
9
CONTROL PCB ASSY & CIRCUIT DIAGRAM (CONTROL
PARTS LIST
BOARD)
11

Keyboard 76 weighted keys (E-F)
Velocity sensitive
Sound Source: Completely compatible with
Roland GS Format.
Power Requirement DC9V,Alkaline Battery(6x MN1500)
or AC Adaptor ACA Series.
Current Draws: 8ØmADC at 9VDC
Power Comsumption: 720mW.(100V/117V/230V/240V)
Battery Life Approximately 25 hours.
, and the second s Note:These figures will vary
depending on the actual
conditions of use.
Jack and Connections MIDI IN; Out1; Out2; Thru
: Sustain Switch
: Expression Pedal
: DC In
Controls Data Entry (Slider)
· Bender/Modulation (Lever)
External Dimension 1195(W) x270(D) x110(HMo)
Weight 8 kg
Accessory Owner's Manual (E-D-F-I) K6Ø18217
: Owner's Manual (E-J-DUTCH) K6Ø18223
MIDI Guide K6Ø181Ø9
· MIDI Cable 1m(Black) 23485228
: Alkaline Battery MN1500 6pcs
2 Battery Set Size "AA" Alk. J25691Ø2
-
-
Music Rest K21981Ø2
: Music Score Holder 222Ø832Ø

DISASSEMBLY

SPECIFICATIONS

Page 2

LOCATION OF CONTROLS

1 - JACK SOCKET HLJ0520-01-010(13449126)

2 - JACK SOCKET HLJ0520-01-010(13449125)

3 - 5P DIN SOCKET 2PZ YKFSI-5054 (13429825)

4 - DC SUPPLY SOCKET HEC 0470 01-630 (13449711)

5 - POWER SWITCH SSSP12114A (13159111)

2

Page 3

EXPLODED VIEW 1 PITCH BENDER W/SENSOR+CABLE(K3278103) CONTROLS PCB ASSY (7697602000) ⊛ o - POWER SUPPLY PCB ASSY - POWER SUFFLITION - POWER SUFFL BATTERY HOLDER FOR 6 BATTERIES 12209532RI JACK SOCKETS ASSY CPU PCB ASSY(7697601000) (7697603000) 0 6 0 a O Ø @ o 0 (P) 0 Ô O

LEFT CONT PCB ASSY+RUBBER 7695005000 76-KEY KEYBOARD ASSY TP/9P (7695013000)

A-33

Page 4

EXPLODED VIEW 2

(1) 7697604000 SILKSCR TOP CABINET ASSY 15029284RI LED DIODE TLHR4401-RED K2168101 SPACER H=115 (4) 1312975301 SWITCH TYPE EVO-OSB 05K J2289115 SPECIAL SCREW 35×95 PR T 8 J2289104 SELF TAPSCREW 29x8 TC TC PR BZ (6) K2588101 76 KEY KEYBOARD TP9 (WEIGHTED) (8) 13429823RI POWER SOCKET BLOCK 13449711 DC SUPPLY SOC HEC0470-01-630 (10) 7697605000 SILKSCR BTM CABINET ASSY J2289113 NUT 3MA N 3 J2139101 FLAT WASHER 1/D4 J2359101 SPACER 3M ART SJ5012 J2289106 SELF TAP SCREW 35×19 TC TC PR BZ 13419723RI 9V BATTERY CONNECTION 12209532RI BATTERY HOLDER FOR 6 BATTERIES

(17) 7697606000 VARNISHED BATTERY COVER

KEYBOARD PARTS LIST

Code Description KEY SPRING gr 63 J2179101 76 NATURAL KEY C5 (ar-10) DO NATURAL KEY D6 (gr10) RF NATURAL KEY E7 (ar10) NATURAL KEY F1 (gr10) FΑ NATURAL KEY 62 (gr-10) SOL J2579116 NATURAL KEY A3 (gr10) J2579117 NATURAL KEY B4 (gr10) J2579118 J2579119 NATURAL KEY C8 (gr10) MI(1) NATURAL KEY G (gr10) SOL(F) J2579121 SHARP KEY (gr10) J2579120 31 SELF TAP SCREW 2,9×8mm J2289104 42 TC TC PR BZ 12 P RUBBER CONTACT 22185238 7** LEFT CONTACT PCE 7695005000 ASSY+RUBBER RIGHT CONTACT PCB ASSY+RUBBER PLASTIC CHASSIS J2589101 GUIDE BUSHING INFERIOR J2359104 76 10 GUIDE BUSHING SUPERIOR 22158789 76 CONDUCTIVE RUBBER(1P) LR 13/1 ¥ CONTACT BOARDS ARE COMPLETE WITH RUBBER CONTACTS

A-33

Page 5

Page 6

Page 7

∆-33

Page 8

θ

MKS

Page 9

A B C D E F G H J K L M N P Q LEFT CONTACT PCB ASSY W/RUBBER C. (or LEFT CONTACT BOARD W/RUBBER C.)

CIRCUIT DIAGRAM(LEFT CONTACT BOARD w/RUBBER C.)

5

9

A-33

Page 10

6

Э

Page 11

PARTS LIST A-33

SAFETY PRECA
The parts no
safety-relate
Use only lis
replacement.
CPU=CPU B
CB =CONTR
LCB=LEFT
UTIONS:
rked ∆ have
d characteristics.
ted parts for
OARD
OL BOARD
CONTACT BOARD
CONSIDERAT
When order
EX.
Failure to
even unde
RCB=RIGHT
JK =JACK
PSB=POWER
IONS ON PARTS ORDERIN
ing any parts listed
17 PART NUMBER
18 22575241
15 2247817380
1 completely fill the
livered replacement.
CONTACT BOARD
BOARD
SUPPLY BOARD
G
in th
DESCRI
Sharp
Knob(a
above
e part
PTION
(key
(range)
(tems
OTE:
s list, pl
MODEL NI
C-20/
DAC-15
with corr
" # "
< >
E
ease speci
UMBER
50
ect number
The part
Componen
Exchange
ty the follow
and descript
s marked
t for EMC.
Parts
ing items in
ion will res
# are new
the order sheet.
ult in delayed or
(Initial Parts).
CASING ~ - and a ψΩ
J23591Ø1
76976Ø6ØØØ
76976Ø4ØØØ
76976Ø5ØØØ
SPACER 3M ART
VARN. BATTER
VARN+SILK. TOF
VARN+SILK. BC
. SJ5012
COVER
CABINET
DTTOM CBN
EEA
EEA YZZA
EEA YZZA
#
#
#
KNOB, BU TTON - a. noe and the second _
K2478198
K24782ØØ
POT. COVER
GROUP 22X8 W/
′DIFF. – Bl _ACK
SWITCH -
13129753Ø1
13159111
SWITCH EVQ-QS
POWER SWITCH
SB Ø5K GR. 1
SSSP12114/
16Ø
A
SW1 on CB
on PSB
JACK, SO CKET 1 at the report -
13449711
13449125
13449126
13429825
DC-SUPPLY SOC
JACK SOCKET H
JACK SOCKET H
5P DIN SOCKET
C. HECØ470
HLJØ520-01
HLJØ520-01
2PZ YKF5:
-01-630
-110
-010
L-5054
JK3
JK1
JK4
JK2, JK3
on PSB
on JKB
on JKB
on CPU
BENDER UN NIT c als Million per c the second s _
K32781Ø3 PITCH BENDER W/SENSOR - CABLE #
KEYBOARD ASSY -
000000000000000000000000000000000000000 NOTE: 76-KEY K
For deta
7695004000 RI
7695005000 LE
22185298 12
7625920000 1
EYBOARD AS
ils refer
GHT CONTAC
FT CONTACT
P RUBBER C
P RUBBER C
SY TP/9P inclu
to Keyboard pa
T BOARD W/RUBBI
BOARD W/RUBBEI
ONTACT
ONTACT LR13/13
des f
rts l
ER AS
R ASS
ist
SSY
ollowin
(pag.4)
g parts.
PCB ASSY -
7695002000
7697602000
7697603000
7697603000
POWER SUPPLY
CONTROLS PCB
JACK SOCKETS
CPU PCB ASSY
PCB ASSY
ASSY
ASSY
A30-A33
A-33
A-33
A-33
A-33
#
#
#
E
IC 23
K525011610
15169550RI
J5259007
J5259102
15239124
15269214
15219103
15199559RI
15199560RI
15229710RI
I. C. TMP60HC1
I. C. 74 HC130
I. C. 74 HC 00
I. C. 74 HC 27
I. C. SSC1000-
I. C. 74LS05
I. C. M51953 A
I. C. TD 62506
I. C. TD 62305
PHOTO-COUPLER
1E9F2237
9 FLAT
15239124 F
STANDING
P
AP
6N 137
FLAT
ΩΑΤ
# IC4
IC7
IC6
IC5
IC2
IC1
IC2
IC2
IC3
TRANSIST )R _
15119155RI
J5119101
15319101
15309101
TRANSISTOR BC
TRANSISTOR BD
TRANSISTOR 2S
TRANSISTOR 2S
/560-B
371 C
C-2412
A-1037KR
01, 03
03
01
02
3 on CB
on PSB
on CPU
on CPU
DIODE 9 1 -
15Ø19159RI
15339112
J5Ø291Ø7
DIODE 1N-4148
CHIP DIODE DA
LED DIODE 3 S
119
LR-37VR3F
D15-D24, D34-
- RED
D45 i on Cł 3/ on LC
D2-D6
CB, RCB
on CPU
on CB
15019345RI
15019158RI
ZENER DIODE BZX79C 5.6V
DIODE IN-4001
D5 on
D1 on
PSB
PSB
RESISTOR
J3919104
J3919105
J3809150
CHIP RES.ARRAY 2512 0X10 K +2C
CHIP RESIST. ARRAY 2512 0X15K +2C
UNINFL.RES. 33 0HM 1/4W 5%
RA1, RA5, RA6 on
RA2-RA4 on
R1-R4 on
CPU
CPU
CB
POTENTION 1ETER unt tritte presition
J3339101 LIN. POT. CURSOR 100KB 10 MS VR1 or п СВ
CAPACITOR 2 over sections.
13649668RI
J3629103
J3629104
J3629105
J3629107
ELECTRL. CONDH 47UF 25V
ELECTRL. COND. 100U 25V P5
ELECTRL. COND. 10U 50V P5 C5-C26
ELECTRL. COND. 47U 50V P5
ELECTRL. COND. 1UF 100V P5
C3 or
C23 or CPU/C1 or
or CPU/C21, C22 or
C2 or
C12, C13, C27 or
CB
PSB
PSB
PSB
CPU
INDUCTOR, COIL, FILTER and the state of the
12449302RI
12449370
12449326
J2399103
J2399104
NOISE SUP.PLT1-R53C< >NOISE SUP.SBT-Ø16ØW< >NOISE SUP.SBT-Ø46Ø< >NOISE SUP.ELKS471FA (CHIP)< >CHIP NOISESUP.EXCCL4532U1 FL1 on
on JKB/L2-L4,L8 on
L1 on
FL2 on
L5,L6,L10 on
PSB
CPU
CPU
CPU
CPU
CRYSTAL, RESONATOR
15299112RI CERAMIC RESONATOR 8 MHZ X1, X2 on CPU
CONNECTOR 2
13419677RI
13369689RI
13439479RI
J3439123
16P FEM. CONN. AMP 1.27
20P FEM. CONN. AMP 1.27
MALE CONN. AMP 6W STANDING
6P MALE CONN. P. 2 M 90
WIRING, C CABLE and the second se n kana ayan yaka ayadan 🔿
7695008001
7695009001
16P FLAT CABLE (26) -2C 2ØP FLAT CABLE (14) -2C #
#
SCREW مى مەرىپىيە
مەرىپىيە مەر
J2289122
J2289126
J2289125
J2289128
J2289160
J2289115
J2289186
J2289119
J2299113
J2139101
SELF TAP. SCREW 2. 2X 6 TC TC
SELF TAP. SCREW 2. 9X 8 TCTCPRBZ
SELF TAP. SCREW 2. 9X10 TCTCPRBZ
SELF TAP. SCREW 3. 5X19 TCTCPRBZ
SELF TAP. SCREW 2. 9X13 TCTCPR BR
SELF TAP. SCREW 3. 5X9. 5 TCPRTFR H. 8
SCREW 3. 5X16 TC PR TFR H. 8
NUT 3MA H. 3
FLAT WASHER I/D 4
MISCELLAN IEOUS
K2160102
22240470
13419723RI
12209532RI
13429023RI
K263011401
K263011501
K2670109
K2610159
SPACER FOR LED H. 2. 0 D. E. 5. 5
ANTIDUST COVER F/POTENT.
9V BATTERY CONNECTION
BATTERY HOLDER FOR 6 BATTERIES
P. SUPPLY PLUG LOCKING
RIGHT POLYST. END-SIDE
LEFT POLYST. END-SIDE
CARTENE ENVELOPE HD 150X40
OUTER PACKING A-33
#
ACCESSORT ES
23485228 MIDI CABLE 1M – BLACK مى يەرىپىلار يىلىرىنى
J2569102
K2198102
22208320
K6018109
K6018217
2-BATTERY SET -SIZE "AA"-ALK.(MN1500)
MUSIC REST
MUSIC SCORE HOLDER
MIDI GUIDE
OWNER'S MANUAL (E/D/F/I) A-33
#
K6Ø18223 OWNER'S MANUAL (SP/DUTCH) A-33 #
#
NDU10220 п
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