Yamaha DX21 - Overall Circuit Diagram

DX21 OVERALL CIRCUIT DIAGRAM
H
DM
TS
DM
CASSETTE 1
J K11
Cassette Interface
OjOl f cj ilc f t OM ^ i eTt TS PZt
9<B
(C^n-n)
\cN6-n) ^
(CNl-6)
MIDI
II 1
firt
PCI
|7cn5-3)
f<rcMs-4.j
0,01
'fCNS-i') 1 hfc M/Di Interface
CCN6- 4)
TT- 2? <5
"< Clv/6 -
GrNP
i.U 4 .
MIDI IN P23\
Y(CNS-S)
(CN4-'D'i rrc^-7)
X^£__
X(CN$~6 )^
220 _"*
T, CS ! IC,S
MIDI OUT P24 *
Clock Grcnerator
X.2
7.15903MHz -#•£
IC 78
7M
0M
E]
ICl4
0CPU
IC18
XI 1A?
§4- 500KHZ rt
500 fc
IehsibbiI
iBgacBiSfliHuH
IpgJojgliB
H.I
■ n
ggl
mm.
^ ■ hI
Pcfii
P33{
^33
RMl
Y 4.7K*S
pi to y
P2 (CM 71-2?
fog)Lp3(am-3) P3 I 1
(VgjJk.p* (CN11-4)
(Qp)kP.SjCNVhS)
PS 1'^
(sg> JLP6 (cmi-6,)
(VI) lP7 CCN11-7) Ig2
Cfi-Y)|yP8 (CN11S)
■
■
j
MK 1
MK L
4^5
MK 3
| MKR
D?^72
D73^24M
E>2jT~36(S]
(whjLpi (CNn-4)
(G&lkfZ CCN11-10)
(SB) JkES flNIMI)
fPTO JLF4- (CW71-12)
CBJ?) (CN10-1)
(KB) f£L. (cmo-i)
(OSOUF*1 CCNIO'3')
(YE)£f8 (CNW'4)
tSnkFI (CNIQ-S)
(BE) If 10 (CN10-6)
(VI)XS7 (CN10-WP1\
\(w t d 8 (cmO'Um
(BSjLST (CN10- 7)Pl
■
ii
pj
&
/(RE)I £2 (CN10-2)
ICQg) X.g3 (CNIO-Q) PS,
(YE) IM (CN10-WP4.
{(ok)Xbs (cmo-n)P5l
841 (rt)
£$jjgeJ
\(5£)Kg^ (Cm0-)2)?i>.
?b l,
P8 i
ir ^jCZj P5o
10K
H>
H>
uUZAki
v lC3D PS2]
Z1C30 PS3,
s^ .z!C30 PU\
1 p^i;r c?a
wic?affT)
r5__a
1
IC* (CNQ-i) Fir]
LP CCN^'Z) F6 J
L P * fflv9-3)
C £ fCA/9-4) F8 J
[F tovl-j-) F9
Lf* few?-*; FTP
C(r CgMMJ F77
L ft* CflVf-8) F1Z
LA (CN9-9) FT3J
' A,F fCN9-70) FH
IS ftW<?-n) F75J
L C (CNQ-12) FJ6
FI
F2
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Y7 52e|
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_P47/
IC1Z
FJOja
FJZ 12.
F75 U
£74 70.
FT? 9
Fib
■ l
■ ■ I
Hill
Kll
HI
Kill
BB
UmI
It
m
a
P6\
a
HZ,
a
ru]
1 jggJ
rr
keyboard
Switch Sc .
Control
•Panel Switch
MATRIX NO.
Switch Nome,
MATRIX NO.
Switch No.me.
1
41 22
86
2
A2
23
&n
3
A3
24
S3
4-
44
25
04
5
AS
26
BIO
6
A6
27
B11
n
An
28
B12
8
At
24
813
<?
A4
30
814
10
A10
31
815
11
ATI
32
816
1Z
yiz
33
Function
13
A?3
34
single
14
A 74
35
EDIT
15
A 75
36
SPLIT
76
A16 3T
dual
IT
B1
38
STORE
18
b2
34
KEYSET
i?
B 3
40
MODE SET
20
54
41
ON
2 7
B5
4Z
OFF
PB
r<CN3-V
Ips
PITCH BEMP
WHEEL
\6-np
Y(CN3-41 ^
MW
MOPCTL^TIOM
whhel
I 63 | (CM-n
| MW .
I
ICZdi/z
©L
+ 5
f (CN3-S)
KMW
IM
_
>7
J (C/V^) N |
Zcti3-i)
GrND
(CW3-7) 3?
7K
BREATH
CONTROL
PN
CPA
(Gr*).
DATA ,
EVTPr
iCU3-8)
DE
iNi
1 < CW4-3)
JK5
(CN3-97
,«-A/P
{CW3-70> ^
IW4J
VOLUME
iK6
Phi
SUSTA1H
When 16k Byte ROM(1N013210) is used for IC2, the >^1
marked parts are not installed.
When 32k Byte ROM(1G155020) is used for IC2, the X.2
marked parts are not installed.
■ Use a 32k Byte ROM(iG155020) when replacing the ROM.
■ IC2 fCl6k Byte ROM (iN013210)
i*U
• IC2 C32k Byte ROM (iG155020) ^ tLT f> -SiM'nv
•ROM -SiB-nCIi- 32k Byte ROM GG155020) i
ffiffl IT <
• WIRE COLOR ABBREVIATIONS
jk n
PORTAMENTO]
ir
BE-’-Blue
BL^Black
BR->-Brown
GG^Grass Green
GR-^Green
GY—Gray
OR— ► Orange
PK—Pink
RE—Red
SB—Sky Blue
VI—Violet
WH—Wh i te
YE—Yellow
* Schematic diagram subjects to change without notice.
**®8&@t±N ige&Ofcis&Y'&tt tfr&lQ tto
IC34
■ Y Reset
s| 1C1S 1C15 7r4
nz . s p &ifrotzL
RES
PES
CPU
IC1
J&-
K/W
f _ zd
27
22
47
48
47 :
46
45
44 ’
43 ’
41
40
39 '
32
37
36
35
34
1CU>
- z °<p-
Tr j Memory
iok /&*\ <t5 Back up
m > ^y P2
Oata Bus
A14 5
ICJ6
106*2
QQ
Converter
icio
SOOK
PS4
dec
7-2
ZEf-r 2-7
Z-6
2-5
IN0
?-4
INI
2-3
ZA
IN 4
A
INS
tut
INI
KEF-
DE
MP
Alt
CK
EOC
ST
n
DO
14 "pT
15
"p?
8
03
12
"ST
?9
~P?
20 D6,
21
on
25 DO
24
*>Y
23
US
i>G4l>
ROM
A 74
#1
%z
A15 5
'AH
*r
\fnm
3 C
2
» ■ ■ «l « 1
IBM
_d
Address Decoder
let
6r22
A2A
Y4
C
Y3
B
YZ
A
vT
frl
Y5
0 n wm
12
rai
n
*< .
ic*
my*
'A3
3
r A*
Z
w .
S2S
37
16
15
14
13
12
. 10
yz
7_
1 eesC
L.R/W?:
*zn?
\&>H 24
icii iciq __
Address Bus
Control Bus
OPP
FM Tone
Generator
1C13
l AO 4
is
vss
CE
P7
J?6
PC rtf
d5
(AW
D4
P3
AT?
V2
A12
01
AH
00
AT 0
A<>
A2
Vpp
A7
AA %000
jAT
s ,
BFFF
A3
OE
A 2
AT
A0
ROM
■ CtC£
' 2
" 25
21
24
25
' 3
4
' s
6
7
2
9
70
2 Z*P
-tS
]0k S,?< Y
Pang-D Vss.
(CNS-i) Vo
(CnS-i) RS
£>. Latch
IC33
ccns-s) g/w.
ccns-6) c;
__
DO
Jl
__
Dl
7
_ _
02
_£
*
P 3
13
D 4 14
_
OS
J_
_
D 6
3
s
P 7
I*
(
n
1
1
1
1
OL 0£
16 (CNS -7) DO ,
ans-s) 01 .
4 (CNg-t) 02
12 tens-w) 03 ,
«r rr.us -111 DA,
ccns-mos .
2 ecus-w ot
n (cNg-14) on (
E
+5
VO
RS
RW
EN
DO
LCD
Dl
P2
D3
D4
05
06
on
D/A Converter
ic 14
L.P.F.
IRES'
ic
DI
SH2
Dft
KB
40
BC
A0
MP
TB
"Tic
BP73
ICZ2 i/Zc
XCZ37/2
(CtJl-4-i
E
J* CCNJ'3}
n
BP23 t
(cni'zy
-r
10222/2^4
XCZ3 2/2
E
^(W-n
P7^
CPA
|SB7J
(CfV5-9)<
l 2 S(?fZ
i E
*.s ° (CW5-«)T
|'CON£--70)
1 1
i 1
j|BZ!L4VCE|f w v ^ j
\bR23
1
1
l 1 i
['•’J” CCN$-7)'
\3
IVCN5W2)
rop)
gg?z
(YE)
fifCW7-£)
(CNI'S)
-o>o-
Mixer
100K 71
i—0^0-
+5
r4
XC35 2/2
\024 1/2
VP23,
i 1024 Z/2
PN
VK13
CPA
3
■ ..I van.
(CV5-Z)<
E <
■ A (chs-iI
’
VCA/5-3)
i
||volume| PW ?3 J
VP 23
i
'CCHS-Sh
,E
L«Z YR 22
•"J (CA/5-4f
Yews-*)
(vi)
4nnp.
105P
ygjz 7O0K | 2
VcNww
I-l~P
(cntW^z I
i/ ^ p 2.2/c;
Headphone Amp
IC3Z
Aim n I JIC2
fT^
r 47/7^ 47
> ■ ia y -r r
PHONES
IC31
<:>-* ■
<s""
7. ■
MJX/A
Tr4
IC2S 7 /2
VP22 100 k
frOA/H?)
U50 2.Z\c
—8 — #—^—
OUTPUT
Muting
Control tr&
rf»
ITc**
Chorus OA //OFF Mixer
ICAO
1/50 4 . 3 look b 8 k
-S-
Delay
IC38
Chorus ON/OFF
470 K
B
DA 3.t}<k N
IC21 ? /2 §
IC29 2/Z
SW
1CZS z/z
tan
tan
0.001
Inverter
1 CZ& 2 /2
Buffer Amp
lCZbl/2
sw
Clock Generator
I C3A
T ypp
0
i?0
M
Kofc
0C
Rffc
VW
Rt
CP2
MIN
CPI
KM
1/55 CM
IS
142.2k
13 look
eMz
n .
ID ]2k
1C16
I C41
Japanese, and Canadian models
General , W. German and Australian models
Japanese and j
U= S. models *
1 (WH)(U-S.)
<J)^<rvp-
I
IC2T^28
■ * ;5
t T^ CGN2-5) |
Jl_y
4 T-scca/Z'^;t
(bu y
(Japanese) |
nmr\
ICAO
ri
( T I
IC31 + y A
101 ,2,8, q t tj^i6
18^20, 29. 30, 39, 35
(CNZ-V '
_] (CfVZ -2) 'l
EMF1 _ £ttPA
/CVZ-^)!
y
I______—
Canadian
mode I
[power] lf o 0 .^
II-
AD
,.^-n 7
ici
AD
1C 2
rwH) J. AC
Y
Tr3
(Cl - 7) j
OtNpA (BL)
CC1-?)
gmA (BL/WHl
(c-hf2-6)
(C1-4)
CndJUpl/Wh).
- : 4-
(Ci-i)T
► tP
CO PM—/f(cHZ-7)
<J>^>
: .-k-pi
nmn
General
model
iPPWCffl l4°^ 7 ^
I_
f
_iiA«
C1 ”2) |
_^iAi
C1-7)T
fcp PM ~ t$'(CNZ -2 ;
t*VNh+5«wz-0
W. German and Australian models
AD
1
yti 7:
^.(?75
720
Tr2
. 08
No tes)
■ D M Circuit Board
ICI
IC2
IC3
I C4~6
ICS,9.11.12
ICIO
IC13
IC14
IC15
IC16.18
IC17.3G
IC19.35
IC20
IC21.22
IC23-28
IC29.30
IC31.32
IC33
IC34
IC37
IC38
IC39
IC40
IC4I
Trl.2,4,5
Tr3,6~8
Tr9,10
i I1D63B03XP
I16k BYTE ROM
; 32k BYTE DOM
;16k BYTE ROM
;M5M5118-15L
;TC40II138I’
;M58990I’-1
:YM21G4
;YM3012B
; ]1P7'1LS 14 P
:TC40II004P
;TC-10I1032I’
:TC40II074I’
; 110311
; TI.072CP
;NJM455RDV
;TC4050!1P
;NJM386D
; TCM 1)1137 4
;I’ST518
:T(:4069UHP
;M'!3209
:i(110090
;T(M0!CBiP
;TA78I.005IU’
:2SC1740S(R,S;
;2SA933S(Q, R)
:2SC287S(A. B)
(HI 140800)
(iN013210)
(iG155020)
(iN013310)
CiG106200)
00111900)
(iOlOGlOO)
OT21G400)
OT30I200)
(i0049G00)
06051000)
06052800)
(16051100)
00134900)
(16076600)
(16001300)
(16001740)
(1605; ,1,00)
OOOTSGOO)
(16116200)
06001720)
(16120000)
06100300)
00001690)
06154800)
Dl~7
ZD1
;1SS133
;05Z12A
:4.7k x8
; 0.022 at F
:TLP552
;Ceram it Oscillator 500kHz
:Quartz Crystal Unit 7.15909MH/.
;CR2032T (Lithium
Battery, 3V)
■ P CA Circuit Board
■ P CB Circuit Board
Dl-42
PVR1
PVR2
PVR3
: 1S1555
; BlOk
;B1! 10k
: AlOk x2
■■ lit Circuit Board
All diodes ;1SS133
•AD Circuit Board
Trl
Dl
D2
D3
D4,5,9
06,7
: at PC7815H <iG063900)
: n PC7915H 0 6077500)
:2SC2555 tJ.L.C)
;2SC2792 (G.WO
;2SC2655
;2SC2634
;S1RBA40 0,11,0
;SIRBA60 (G,WG)
:ERB4302
;ERB4406
;1SS84
;ERB4402
: S2K20
:RD6.2EB2
:Blk
;PLA3021A (J,U,C)
:R5E203A (G.WG)
:FL9H151K
:PC817 (J.U.C)
:PCS11 (G.WG)
ICI
iT ^
IC2
L.
PC 1 '
Tt-3
(Cl-7)^
drNp A cBD
sTt
- toDM“+/5 (CN2-S)
(C,-5)T -taVHrEicn-t,
^<J>^^tcT>M-WPcc^-4;
^- ► to PM— ISccvZ-7)
_tsL
Cl *2) j
i
tSl ^R) .
(C 1-1)1
t»5M-rtTCCA/8-4,
• to 1>l4-+5‘t:cv2-fj
____J
' .
•*F1
4 -n ■ %-R2
Japanese
2S6V 2 A
TM205(B7 ~S)
10/3W
u.s.
2S0V ZA ST4
TM2 05(81-6)
10/3W
Canadian
2S0V ZA 5T4
TYAQI8
10/2-W
Genercrf, W- German and
Ao9t t-aliarx
25# V T S0*mA
TrAoaoiBE-6)
22 / 3 W
30
H
M
N