Yamaha BB 604 Service Manual - Page 8
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BB604/BB605
CIRCUIT DIAGRAM
CIRCUIT BOARD
FRONT
PICKUP
BALANCER
OP AMP
REAR
PICKUP
WIRING
Upper side: S (BB604)
Screw the lug terminal in
cavity for the front pickup.
Box for Dry Cell
8
BASS
TREBLE
Electrolytic Capacitor
Mylar Capacitor
Ceramic Capacitor
FRONT PICKUP
N (BB605)
GY
BL
RE
BL
WH
BALANCER
A+C 500KΩ
MID FREQ. SWITCH
REAR PICKUP
MID FREQ.
GY
BL
M.VOLUME
B 20KΩ
WH
RE
WH
RE
WH
BASS
B 50KΩ
OP AMP
M.VOLUME
MID FREQ.
BAJJ-07
Upper side: N (BB604)
S (BB605)
Screw the lug terminal in
cavity for the rear pickup.
to bridge ground
BL
SWITCH
Jumper Wire
(ON-OFF)
RE
BE
WH
MID FREQ.
BL
BE
TREBLE
RE
B 50KΩ
WH
BL
OUTPUT JACK
BATTERY
DC9V
OUTPUT
JACK
A 50KΩ