Service Manual
8-4. Schematic Dlagram-4 [Main
C.B-
4/6)
TRCl.
118
18
-
118
1
ECAaJS
IC3D
74l5245
CAl
2
10
80
18
r<
IP43
ECAl
Cl2
3
II
81
17
r<
IF44
ECA2
CAJ
4
16
[-<
TNS
ECAJ
CA4
s
12
82
15
r-
IF46
ECA4
AJ
83
CAS
6
A4
84
14.[:
TP47
ECAS
CA6
7
13
r--
TP48
ECA6
CA7
8
AS
8S
12
r
IP49
ECA7
16
86
CAS
9
A7
87
II r:-
IPSO
ECA8
~
ii[
OIR
G1952
2
IC29
74LS24S
CA9
2
18
r
TP~
l
£m
AO
80
CAIO
J
11
81
17
r
TP52
ECA!O
CAll
4
12
82
16
r-
TP~
\
3
ECAll
CA12
s
Al
83
15
r-
11'54
ECA12
CAll
6
A4
84
14i--
TP55
ECAIJ
CAI4
7
AS
85
11
r-
IPS6
ECA14
CAIS
8 12 r-
IPSl
ECAIS
CAI6
9
16
86
11
r
IPS8
ECI16
A7
87
~
ii'
OIR
G1953
3
IC28
74ACT245
@ooTQK2
CAll
2
18
rOIP
5'!
EeA17
AO
80
CA
IB
J
AI
Bl
17 I-OTP60
EeA18
CA
19
4
16
i-C
TP6
,
ECA19
A2
82
~
AJ
BJ
r-H--oNCI
~
14
84
~11:2
...-+
15
85
Ht-or~:J
R
l60
Ollttl
8
A6
86
DOTQKI)®
L
___.1..
II
17
87
ur±
DOTQKO
~
ii'
I
O!R
G1980
vee
vee
RA
I
IOK•B
4
5
CNl28
10
10
,....,_
r
,.....
IC27
74LS245
I 2
J 4
6 7 8 9
coo
2
AO
80
18
r<
IP67
ECDO
COl
J
AI
81
17 r<
IP68
ECDI
C02
4
A2
82
16__r:
TP69
ECD2
COl
5
A3
Bl
15
r
IP70
ECD3
CD4
6
14
84
14r
IP71
ECD4
CDS
7
IJ
r
IP7
2
ECDS
AS
85
CD6
8
12
r
IP73
ECD6
Cll7
9
A6
86
11
r-
I
P74
ECD7
A?
87
19
ii[
5
I
vee
vee
OIR
Rl2
IO
K•8
G1955
5
CNl2810
10
,.....-r<
IC26
74LS245
I 2
j 4 6
!•19
CD6
2
18
r<
IP75
I
ECD8
CD9
3
AO
80
17
r-
IP76
EC09
COlO
'
AI
Bl
16
r-
TP77
ECO
ID
A2
82
COil
5
A3
83
I
S__i:::
TP78
ECD
II
CDI2
6
A4
84
14
r
IP79
ECD12
COil
7
IJ r
IPS
O
ECD
IJ
CD"
8
IS
85
12 r
IPS
I
ECD
14
A6
86
CDIS
9
A7
87
II
[-<
TP82
ECD
IS
19
ii[
6
I
DIR
G1954
A B
-
19-
ECOIIUS
IC6
31S-5778
@rm4
:!::
81
CLK
TEST!
+--o
TP
8J
C65
Cll
27
TESTO
r---o
75
I«JTJ
AI
USED
CA2
28
A2
6
O
AO
CAl
29
OAO
DAO
AJ
7
011
CA4
30
OAI
012
OAI
CAS
31
14
012
J--
OAJ
OA2
AS
9
CA6
32
3A3
~-
OA4
OAJ
CAl
JJ
A6
014
OAS
DA4
A7
II
CAB
34
015
DA5
A8
12
016
CA9
JS
016
lJ
Oil
DA6
CliO
36
19
017
DA8
DA7
110
14
CAll
31
018
018
em
38
All
17
ORASO
112
-
CAll
39
OR
ISO
18
ORIS!
OUCAS
All
ORIS!
CA14
42
A14
ORAS2
:>lJ---o
106
IUAS
CAIS
4l
115
ORAS3
~101
ORASO
CA16
"
116
lli.CAS
OLCAS
1M
CAl?
45
All
OUCAS
21
OLCAS
DOE
CAI8
46
Al8
u;;r
23
1)1,{
em
41
24
DOE
CA20
48
Al9
DOE
CA2
1
49
A20
A21
CA22
50
A22
RME
~--I
CA2l
51
A2J
rtlE
~-ti)E
CA24
52
A24
SRI,.;E
.Jl----
SRAI1CE
@
CR/\1
58
RIJI\ii
tWl
~-tWl
CRO
59
Rl)
vee
ccso
6J
m
SlfC
CE
.J!--•
SlfCC
E
CCSI
62
ces2
61
CSI
~82
,--<
~
EXCEO
R%
R97
EXCE
l
~-<l8J
()QH(
68
~T
~T
\lEI
EXCE2
~-<ll08
U$!'0
USE
D
OQHO
69
\lEO
IOCE
~-<li09
®(~II
78
~II
SF
II
79
SF
II
iiTiiT
~-~
BACK
71
BACK
VINf
EX8ACK
72
55
BIRL2
BRL
S 7
£imf
i1ill
54
B!Rll
BGR
75
au
IRED!
BREQ
76
8GR
EXBREQ
n;
iiR£ij
-t--
EX8REG
BEN
CIIAIT
64
wm
BOIR
OAO
CBS
84
OAI
~
~
:
OA2
CIIATIN
67
DA
J
iiiTii '
CI
V
ECF
57
fillr
E\11
5
OA4
'
OAS
@
STSRES~
DE
CON
OA6
RESET
OA7
TOSIII
BA
OA8
DCC
G6
OUCAS
OLCAS
ORASI
1M
DOE
r--
-
-----
-
----
-------,
I
I
BYPASS
CAPACITOR
FOR
IC26.
IC27
.
IC28.
IC29
.
IC
JO
I
VCC
.
20
I
I
GIIQ
,
(O
I
I
I
I
vee
vee vee
vee
vee
I
I
~C87
~CBS
~
C89
~C90
~C91
I
I
I
I
JOI•
JOL•
JD
.
I•
ro.t,
JO
I•
I
I
I
I
I
~
--
-
--
-
---
--
------
--
-~
I
I
BYPASS
CAPAC!TOR
FOR
le6
VCe
•l6.
21>
41.
56
.
65.
90
.
91
I
GIIO
·
S.
IS.
25 40. 5160.
61>
7
0.
74
.
82
.
90
.
IOU
I
I vee
I
2
I
I
lc5
7
l c
i0
6
l c to7
lm8
I
10
I•
ro
,,
ro
.
l.
T O.
I•
I
I
l
I
L-
--
---------
-
---
----
,_
c
D
E
IC31
~14260
1-
701
76
o---H-
II:
I
ECII
9
-i}-o
77
ECA2
8
AO
11:2
17
ECA3
7
18
AI
11:3
-¥n----o
78
ECA4
6
12
NC4
~
7
9
19
ECAS
5
22
A3
ECA6
4
A4
2J
ECA7
J
AS
24
ECA
8
2
25
16
EC
A9
40
11
26
2
ECDO
ECAIO
39
A8
DO
J
ECOl
ECAII
38
01
28
4
£C02
ECAI2
37
LOS
02
29
LCAS
OJ
5
ECOJ
E
CA1
3
36
14
RAS
04
7
ECD4
ECA
14
J5
13
il
05
8
EC05
ECAIS
J4
27
ii[
06
9
EC06
ECAI6
JJ
C97
J_
p8
:!::f99
07
10
EC
Ol
ECAll
32
NOT
~T
~T
ll
EC
08
ECAI
8
I
l
USED
l
US!'O
l
USED
08
32
EC09
ECA
I9
2
09
JJ
ECO
IO
010
k
Oil
J4
EC
Dll
@~:
10
012
36
ECD12
VCCI
013
ll
ECDll
12
VCC2
014
l8
EC014
TP
I20
0
VCCJ
DIS
J9
EC0
15
f
~55,fti40
0 1• I•
21
V
SS
I
-
~
VSS
2
V
SSJ
0
HITA
CHI
G1363
ECAI
10
E
eA2
9
EeAJ
8
IC32
EC14
7
~14260
1-701
ECA5
6
84
o---H-
ECA6
5
II:
I
AD
NC2
-i}-o
89
ECA7
'
17
EeA8
J
18
AI
NCJ
-¥n----o
88
EeA9
25
19
A2
NC4
~87
ECAIO
24
AJ
22
ECAII
21
23
A4
ECAI2
23
24
AS
EeAIJ
2
25
A6
EC114
26
26
A7
2 Ee
OO
ECI
IS
I
18
00
J
Ee
OI
01
28
LOS
02
'
EC02
29
LCAS
OJ
5
ECO
J
@
SCE2
,...___R
14
RAS
04
7
EC
04
ll
~
05
8
EC
05
27
ii'
06
9
EC
06
[~~~
::!:~
1
0 2
07
10
EC07
@
27
NOT
Jl
EC
D8
JuS!'o
06
lftiR
~
32
EC
09
09
Jl
ECO
ID
k
010
34
EC
OII
Oil
36
EC
D12
012
J7
ECO
IJ
VCCI
Oil
l8
EC
OI4
VCC2
014
V
CCJ
DIS
J9
EC0
15
+
~56'
=f
Cl41
0. I• I• 21
VSSI
-
~
V
SS2
V
SSJ
0
Hl
TACH!
G1364
F
G
-20-
IC7
TCS742000
10
00
13
ECOO
15
ECDI
AI
01
ll
ECD2
12
02
19
ECD3
AJ
OJ
22
ECD4
14
04
24
ECDS
15
05
26
ECD6
A6
06
28
ECD7
Al
Dl
14
ECD8
A8
08
16
ECD9
19
09
18
ECD10
A10
010
20
ECDll
All
011
112
012
2l
ECD12
All Oi l
25
ECDIJ
114
014
21
ECD14
AIS
015
29
ECDI5
Ai6
9
All
in
Al8
lilt'
vee
I
iE
:bcsl,
fcm
11
_To
,.
10.
a:
Gill
Gill
~
HITACHI
G1569
ICB
lP04J257B
1-1201
II
ECDO
AO
IIlli
12
ECDI
II
llll2
IJ
ECD2
12
1/0J
IS
ECDJ
A3
llll4
16
ECD4
14
1105
17
ECDS
AS
l/
06
16
(/
07
18
ECD6
19
ECD7
A7
l/08
A8
19
AID
A
ll
Al2
All
Al4
B?
CE2
vee
28
ffs'.fCEJ8
0. I•
NOT
iE
Glf)
14
,),.
USED
il
I£C
G3
BB
BB
88
H
ECABUS
®
ECI8JS
®
IIBUSC!»>
TROL
®










