Roland HP 2700 Service Notes page 14

HP-3700/2700 Dec.
1990
SWITCH
BOARD
CIRCUIT
DIAGRAM/ SWITCH
-NOTE
SWITCH BOARD
circuitry is
common
to
HP-2700
and
HP-3700.
But assembly
number
is
different each other because
length of wiring connecting to board
is
different
each
other.
SWITCH
tT:- HP-2700
t
HP-3700
MAIN
BOARD
CN7
CN0
J
AMP
.PS
BOARD
CN5
r
SWITCH
BOARD
KEY
TRANSPOSE
TEMPERA
MENT
PIAN01 PIAN02 HONKY
TONK
HARPSI
CHORD
VIBRA
PHONE
E.
PIANO CHORUS TREMOLO REVERB
ROOM
REVERB
STAGE
REVERB
HALL
VALUE
DOWN
VALUE
UP
DEMO
LED1 LED 2 LEDS LED4
I I
LED1
. .
.LED16=SLH34VC
D1
. .
.D16=1S2473
D4
'
CN1
1
SRDO
2 SRD1
3 SRD2
4
SRD3
5
LWRO
6
LWR1
7
LWR2
B LWR3
9 SCLO
10 SCL1
1 1
SCL2
12
SCL3
1
CN3
A -GND
A. GND
3 A.
+5
4
VOLUME
5
BRILLIANCE
+5
LED5
D5
p
CM
SW5
LEDS
D6
P
o
SW6
LED7
D7
P
O-
SW7
LEDB
DB
£
LED 9
raW
—
t
rasW
—
f
rspKI
—
raW
—
f
raKI
—
f
raW
—
f
raW
—
t
raW
—
f
raW
—
f
rat^3
—
f
paW
—
f
raKl
—
f
pate]
—
f
paW
—
—
f
paM
—
SWB
D9
£
LED10
swg
D10
P
o—
SW10
LED1
1
D11
P o-
SW1
1
LED 12
D12
P
0"
SW12
LED 13
D13
P
SW13
LED 14
D14
SW14
LED 15
D15
P
o-
SW15
< R6 <
R
r
4^
R5
OK
LED
16
DIB
p"^
SW16
t
Q1
DTA1 14
Q2
DTA1
14
Q3
DTA1
14
Q4
DTA1 14
£
R3
OK
BRILLIANCE
1S2473X
VR1
019
10KB
C5
0.1
VR2
10KB
100
D.+5
4
CN2
1
T5TTS
2 D
.
+5
3 D
.
+5
4
D
.
GND
5 0
.
SND
6 D
.
GND
LI
-r
II
L2 —
j—
Cl
1
0.1
C3
Z^cio
47/ 16V
m
D
.
GND
m
0.1
C7
0.1
14