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Block diagram
Transmission part
5
4
Battery
holder
Rotary switch
3
1
2
3
Volume
2
1
A
RMOUT
IC101
Micro controller
Key1~6
Key7~13
DC-DC converter
Power
IC103
supply
GND
ROT1 to ROT6
VOL 2
B
LATCH1
SIN1
LED driver
RST1
CK1
IC104
PRESENCE2
PRESENCE1
SPEAKER2
SPEAKER1
MUTING
LED driver
LINE1~6
IC105
LED driver
LATCH2
SIN2
RST2
IC106
CK2
to
IC110
Data line buffer
SDA TO
IC112
SCL IC
Modular
jack
C
RM-RE9000
LED
ATT
EXT
LED
LED
D
2-1
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