A GROUND
A BATTERY
BATTERY
FEED
TIP
RING
TALKBACK
AMPLIFIER
INHIBIT
PAGE
CONTROL
K10
LAMP SUPPLY
LAMP
B GROUND
POWER
SUPPLY
B BATTERY
LED 1
LED
LED 2
CONTROL
LED 9
MUSIC IN
MUSIC IN
MICROPROCESSOR
TONE
DECODER
ALL CALL
CONTROL
K0
MUSIC
CONTROL
SIMPLIFIED SCHEMATIC V-1109RTHF
13
K0
K1
K10
1-5
AMP
6-9
K0
AMP
K1
RET 1
SPK 1
K2
RET 2
SPK 2
K3
RET 3
SPK 3
K4
RET 4
SPK 4
K5
RET 5
SPK 5
K6
RET 6
SPK 6
K7
RET 7
SPK 7
K8
RET 8
SPK 8
K9
RET 9
SPK 9
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