Samsung SGH-800C Service Manual page 26

Power
Stabilizer
(12V-28V)
Ignition
Calibration
5V
Regulator
Power DC/DC
Regulator
Control
MICOM
EEPROM
DSP
CODEC
Volume
Control
Current
Detector
Voltage/Current
Feed Back
Data
Communication
TX
Amp
RX
Amp
Audio
Amp
Microphone
Speaker