Icom IC-M424 Service Manual page 5

SECTION 2.
BEEP/DSC ENCODE SIGNAL BUFFER
DSC DECODER
(IC11)
DATA LINE BUFFER (TXD)
(IC6)
NMEA LINE BUFFER
(IC12)
DATA LINE BUFFER (RXD)
(IC7)
EEPROM
(IC9)
BACKLIGHT LED DRIVER
INSIDE VIEWS
• LOGIC UNIT
DSC SIGNAL LINE SW
(Q1)
(IC3)
(IC2)
PHOTO COUPLER
(IC8)
2 - 1
+3.3 V REGULATOR
(IC4)
RESET IC
(IC10)
CI-V INTERFACE
(IC5)
CPU
(IC1)
CPU CLOCK
(X1)