Block Diagram - Icom IC-M220 Service Manual

SECTION 8

BLOCK DIAGRAM

JACK UNIT
HM-237
MICG
MIC MIC
PTT
PTT
CLONE
J2
FRONT UNIT
IC701
SP1
INT SP
AF
AMP
HV
5V
Q1,Q2,D1 IC3
DIM
AMP DSC SW
CTRL
HV
IC14
DS2~DS9
DTEST
LCD L3V
DS1
L3V PWM PTT
LCD DSCO
A/D
BUFF
MODULE
IC2B
L3V
KEY
BOARD
BEEP
A/D BUFF
L3V IC2A
CPU
CI-V
I/F
ICF3
X1
IC1
IC5A/B,Q3,Q4,D3
7.9872MHz
IC10
For only IC-M220G
RESET
IC201
L3V
GPS IC9
Engin
EEPROM
FI201 L3V
SAW
Filter
IC4,D11
EP2
L3V REG
3.3V
GPS
Antenna
GPS ANT
UNIT
L3V
NMEAI
BUFF
IC5C
MAIN UNIT
MICIN
WXDEC
VCC
IC703
IC702
AF PRE
MUTE AMP
AFINM
DSCDEC
EP4
WXDEC
IC504D
EP2
AF
MUTE
5V
DSCDEC
IC504B
AF
MUTE
DSCENC DSCS
IC506
EVOL
AFVOLI V1
BEEPO AFVOLO
IC505
MIC
AMP
HV
5V
NMEAI+
PHOTO
COUPLER
NMEAI-
IC552,D551
5V
NMEAO+
NMEAO
BUFF NMEAO-
IC551
IC201
ADC
DSP
DAC
Core
ADC
Audio filter
RSSI
Sub CH filter
FM modem
AFC loop
Synthesizer
ADC
IC301
ADC
EP3
DSP
DAC
Core
ADC
EP1
Audio filter
RSSI
Sub CH filter
MAIN DET FM modem
AFC loop
Synthesizer
ADC
HV(LOGIC)
5V
V2
HV
REVERSE
CONNECT
PROTECT
D601
Explanatory notes
DATA Line
COMMON Line
IC504A
TX Line
AF
MUTE RX Line
Voltage Line (HV)
Voltage Line (VCC)
Voltage Line (5V)
Voltage Line (3.3V)
8-1
PGA
LNA LPF
0/90
PGA
3.3V
LDO
VCO
RA
ATT
driver
MAIN-Lo Frequency range(USA)
TX:156.025MHz~157.425MHz
IC302 X2
TCXO 3.3V
BUFF
26.0MHz
PGA
LNA LPF
0/90
PGA
3.3V
LDO
VCO
Q12
RA
YGR
driver
AMP
T5V
Q201,Q202
5V R5V
R5
CTRL
VCC
HV
Q10,Q11
T5V
Q511,Q512 IC512 T5
CTRL
PWR +5
CTRL REG
IC511
3.3V
+3
REG
R5V
D16
RF
DISTRIBUTOR ATT BPF
AMP
Q101
Frequency range(USA)
TX:156.025MHz~157.425MHz
RX:156.050MHz~163.275MHz
HL/ATT
ANT
ANT
LPF
SW
D14,D15
LPF
Q13 Q14
D12,D13
PRE PWR
DRIVE AMP
RF OUT TDETV
DET
HV HV
D11,Q17
IC2
PWR HL/ATT
APC CTRL
CTRL
T5V
Q18,Q19 Q16
BIAS TX MUTE
CTRL CTRL
EXT SP+
EXT SP-
NMEAI+
NMEAI-
CHASSIS UNIT
NMEAO+
NMEAO-
EXT SP+
EXT SP-
NMEAI+
NMEAI-
NMEAO+
NMEAO-