Block Diagram - Icom IC-M502 Service Manual

SECTION 10

BLOCK DIAGRAM

EXT.SP
OPTION
EXTERNAL SPEAKER
MIC
HM-126
SPEAKER MIC
SP
LOGIC UNIT
SP
SQL UNIT DIAL UNIT
D5V
ENCODER
SQLV
IC1
µPD789405AGK-A30-9EU
IC2
HD66712SA03FS SUB MPU
DS1
LCD
DRIVER
Q1, Q4
LCD
2SK1069
CONT
Q2 2SC4116
Q3 2SB1132
Q8 2SC4116
DS2–DS17
SML-311YT
DIM
CTRL
Q5
DTA144EU
Q6
DTC144EU
Q37 DTC144TU Q35 DTA144EU
D24 DA204U Q36 DTC144TU
MAIN UNIT
CLONE
X3
DMX-26S
32.768 kHz
MAIN MPU
7.9872 MHz
X4 IC16
CR-610 MB90F583BPFV-G
IC18 TC7W14FU
Q40 2SK1069
IC1
AF/MIC TC4W53F
OPTION
PTTC/EXTRXD/EXTTXD
PWRC/ICF3
VCC
HM-127
CTRL UNIT
IC4B
NJM4558M
WX ALERT
IC4A
IC5 NJM2211M
NJM4558M
IC6 TC7W14FU
DSC DEC
DSC
DECODER
SQL
VOL UNIT
KEY
BOARD
AF
X1 VR
4.91 MHz
SRESET
Q32 2SC4116
D23 1SS355
RL2 FTR-F3AA012E
RF
MUTE
IC14
LA4425A
SP
BEEPM
IC15
S-80928ANMP IC10
BU4066BCF
RESET
MIC
AMP
MIC
AMP
IC17
HN58X2464TI
EEPROM
DSC
10 - 1
FI3
ALFY450E
IC1
TA31136FN
FM 2nd IF 2nd
DET AMP MIX
2nd Lo
BUFF
IC20
NJM2125F
SQLI
X2
21.25 MHz
CR-659
IC2
µPD3140GS
Q5
2SC4215
Q8 2SK210 Q9
D9, D10 MA363B
2SC4215
RX-VCO
R8
T8
Q22 2SB1132
Q23 DTC144EU
TX-VCO
Q7 2SK210
D6–D8 MA363B
VCC
IC13B IC13A
NJM4558M NJM4558M
Q26
2SJ144
IC12
Q27 Q24,25 BU4066BCF
2SJ144 2SC4116
IC11B
NJM4558M
IC11A
NJM4558M
Q33
2SK1069
SCRAM
UNIT
Q28
2SK1069
OPTION
Q31 DTC144EU
Q32 2SC4116
ATTA
ATT
ATTB
FI1, FI2 3 stage 1 stage
Q4 Q2
Q3
FL-310
2SC2714
3SK292
3SK166
Q11 Q12 IC3
2SC3775 SC-1302
2SC2954
D11, D12
MA77
VCC
Q10
2SC4215
TX
MUTE
CTRL
Q15
DTC144EU
8V VCC
Q20 2SB1132 IC8 RL1
Q21 DTC144EU TA7808S FTR-F3AA012E
R8 T8
CTRL CTRL
IC9
R8 T8
TA7805F
A5V
LOGIC UNIT
HVS
COMMON LINE
LINE
RX LINE
TX LINE
DATA BUS LINE
ANT
D16, D17
XB15A308
Q18 2SC4116
D14, D15 HSM88ASR
TXDET
RF OUT
DET
Q14 2SB1143
Q16 FMW1
VCC
T5
TMUT
Q17
DTC144EU
HI/LO
D19
DSA3A1
REVERSE
13.8V
CONNECT
PROTECT
HV