
2-4
• MAIN-A UNIT (BOTTOM VIEW)
J254
J253
ETHERNET REFERENCE CLOCK
(X951)
ETHERNET TRANSCEIVER IC
(IC951)
FLASH ROM
(IC104)
SIM SELECTOR
CIRCUIT
DC/DC ENABLE
CONTROL CIRCUIT
13.8 V DC/DC
CONVERTER CIRCUIT
POWER ON
CONTROL CIRCUIT
REVERSE CONNECT
PROTECT
(D851)
3.3 V
REGULATOR
(IC852)
3.3 V DC/DC
CONVERTER
(IC802)
3.8 V DC/DC
CONVERTER
(IC821)
5 V REGULATOR
(IC831)
8 V REGULATOR
(IC803)
9 V DC/DC
CONVERTER
(IC801)
ELECTRONIC
VOLUME
(IC703)
CODEC
(IC401)
SDRAM
(IC103)
Inside the shielded case.
SDRAM
(IC102)
Inside the shielded case.
CPU
(IC101)
Inside the shielded case.
ANALOG SWITCH
(IC752)
MAIN-A UNIT