Roland HP 2700 Service Notes page 36

HP-3700/2700
1C
DATA
OTP CPU
(IC24 on
MB)
HD6475328
(15199714)
Effect Custom
1C (IC5,9 on
MB)
TC23SC140AF-008
(15239143)
64
41
MASK ROM
LH5308
(15209240)
(program) (IC16 on
MB)
PCM CUSTOM
1C (IC26 on MB)
MB87731
(15239146)
90
61
Gate Array (Key
Scan.) (IC23 on
MB)
SSC1000
(15239124)
64 41
D
RAM
(IC1,2,7,8
on
MB)
HM50464P-
1
(15179362H0)
TOP VIEW
Wave ROM
HN62304BP
Wave ROM
HN62304BP
Wave ROM
HN62304BP
A
(IC28 on MB)
A
(15209225)
B
(IC29 on
MB)
B
(1
5209226)
C
(IC30 on
MB)
C
(15209227)
N,C.
Q[
SI
VDD
A16
^
il)
A18
A15
[T
30)
A17
A12
^
A14
A7
[£
^
A13
A6
[T
^
AS
«[7
26|
AS
A4
^
5| All
A3
^
2^ OE
A2
Qo
^
AlO
Ai
[n
^
CE/S
AO
Qj
^
07
00
Qa 2^ 06
01
QI
^
OS
02
Qs
1b| 04
GNO [l6
03
S
RAM
(IC21
on MB)
SRM2264M-12
(15279507)
NCC
1
A12C 2
A7
C
A6
AS
A4
A3
A2
A1
AO dlO
l/OlCll
1/02
C
12
1/03
C
13
VssCU
CO
TO
ro
ro
28
3
27
3
Voo
WE
CS2
A8
A9
Ml
oe
P
AlO
CSl
1/08
1/07
pl/06
1/05
15p
1/04
26
3 (
25
3 >
24
3
23
3
22 P
21
20 d
19
3
18
31
17;
16
31
D/A CONVERTER
(IC7 on JB)
TDA1543
(15209145)
BCK
WS
[IT
DATA
GNO
A
"cr
m
TDA1543
AOR
'fel
AOL
5
I
Voo
36
Dec.
1990
D/A
Converter
(IC2
on JB)
PCM56P
(1
52091
22)
Dual
D
Flip Flop (IC3 on
MB)
TC74HC74F-T2
(15259720T0)
Quad 2-
Input
OR
Gate
(IC18
on MB)
TC74HC32F-T2
(1
525971 6T0)
Hex
Inverters (IC6,25,27
on MB)
TC74HCU04F-T2
(15259706T0)
TRUTH TABLE
A B Y
H H H
L H
H
H L H
L L
L
TOP VIEW
Octal
D
Flip Flop (IC15 on MB)
TC74HC574F-T2
(15259823T0)
Dual
4-
Bit Binary Counters
TC74HC393F-T2
(1
5259809T0)
(IC4 on
MB)
Single
2- Input
AND
Gate
TC7S08F
(15259884)
(IC18 on
MB)
Single Inverter
TC7SU04F
(15259887)
(IC17 on
MB)
HD
TTOnT