Yamaha STAGEPAS 300 Service Manual page 53

A B
Q Q
STAGEPAS 300 CIRCUIT DIAGRAM 4/5 (VR) 3 7 6 3 1 5 1 5 0
VR
CH1
CH2
CH3
T E
L 1 3 9 4 2 2 9 6 5 1 3
CH4
w w w
.
STAGEPAS 300
C D
LOW
OP AMP
NJM2068M
2/2
1/2
REVERB
LEVEL
HIGH
LOW
OP AMP
NJM2068M
2/2
1/2
REVERB
LEVEL
HIGH
LOW
OP AMP
NJM2068M
2/2
1/2
REVERB
LEVEL
HIGH
LOW
OP AMP
NJM2068M
2/2
1/2
LEVEL REVERB
HIGH
ON OFF
LEVEL
(MASTER)
AC/DC Voltage Level Meter
LIMITER
x a o
y
i
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E F
8
LOW
OP AMP
NJM2068M
LEVEL
1/2
HIGH
CH 5/6
LOW
OP AMP
NJM2068M
1/2
HIGH
LOW
OP AMP
NJM2068M
LEVEL
1/2
Q Q
3 7 6 3
HIGH
CH 7/8
LOW
OP AMP
NJM2068M
1/2
HIGH
MONITOR
OUT
1/2
OP AMP
NJM2068M
MONITOR
OUT
2/2
u 1 6 3
.
to INPUT-CN22 (Page 3/5: E-4)
: Mylar Capacitor
: not installed
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G
2 4
9 9 8
2/2
REVERB
2/2 (CH1~4)
LEVEL
2/2
1/2
1 5 1 5 0 8 9 2 4
2/2
LEVEL
2/2
1/2
SPEECH
MUSIC
OP AMP
NJM2068M
2/2
m
ZA1E5A00404
c o
Note: See parts list for details of circuit board component parts.
STAGEPAS 300 CIRCUIT DIAGRAM 4/5 (VR)
H I
2
STAGEPAS 300 9 9
1
to FILTER-CN28
(Page 5/5: E-5)
2
3
9 8 2 9 9
OP AMP
NJM2068M
4
5
4
6