Icom IC-F5220D Service Manual page 33

SECTION 10. BLOCK DIAGRAM
8V
Q3
LVIN
BUFF
to CPU
2SK880
X2 IC8
15.3MHz
VCON PLL LOOP
REF
IC FIL
AK1541
SCK
SO
Q4 PLST
from/to
X3 LPF
CPU(FRONT)
2SC4116
45.9MHz
IF IC
BPF
Q13
NWC
X1
W/N
SW RSSI NOIS
to CPU(FRONT)
JTBM450CX70
J1003
Ext.I/O 6 (IGSW) to CPU(FRONT)
Ext.I/O 11 (HORN) from CPU(FRONT)
I
(EAFO) from RX AF
CP_3
ACC K to CPU(FRONT)
PGIO4
Ext.I/O 7 (AFO)
DISC CP_3 DISC
Q1007
Q1010 SIG
Q1009 to FM MOD
F
IN TX F
SW to FM MOD(TX VCO)
CP_3
Ext.I/O 14 (EPTT)
Ext.I/O 4 (SERIAL) to CPU(FRONT)
Ext.I/O 10 (SERIAL)
Q10
Q2 Q8
RIPPLE VCO
FIL SW
RX VCO
Q6
2SC4116 D11 D4
D5
RLVA RLV Q12
ADJ
BUFF
2SC5006
D12
TLVA TLV
ADJ TX VCO
Q7
D6 Q11
D7
AMP
D10 HVL355CM
2SC5006
FM
MOD
Q14 D13,D14
IF D/A
AMP SW
IC4
F
2SC5107
D8,D9 ADS
Q1 from CPU(FRONT)
FI2
CERAMIC
W/N MOD
SW BPF
450kHz
FI1
CERAMIC D2,D3
W/N
BPF SW
450kHz
LTM450HW NWC
from CPU(FRONT)
Q5 IC5 FI3 IC2002
CERAMIC
DIF
BUFF
AMP A/D
BPF
NJM2711F ADS7886SDCKR
LTUCG450G
2SC4116
DET
IC1010
NJM13403V
SQIN
BUFF
VOL1
BEEP
NJM13403V
AFVO
BUFF
DAFO
VOL1
NJM13403V
REF
VCON
BUFF
BAL VOL1
VOL1
NJM13403V
MOD
LPF
VOL1
NJM2783V NJM13403V
LIMIT
HPF
AMP
MOD
ALC
MICI
AMP LINE
AMP
CTRL
10 - 1
RXC MAIN UNIT
HVD142A
Q15 D15,D16 Q17
TX/RX 2SC3357
BUFF DRIVE
SW
AMP
2SC5006
182.35MHz-220.35MHz
ATT
RSSI
from IF IC
FL-442
(Analog) 46.35MHz
FI4 D17,D18 D21
Q19
XTAL D/A
BPF
BPF SW
3SK293
HVB350BYPTL
(Digital)
FI5
T2 from VOL IC
XTAL ADS
BPF from CPU(FRONT)
FL-448
IC1004
PRE
AFVO
AMP
IC2007
De-Emphasis
Signaling
BDR0
Decode
BFSR0
BCLKR0 from/to
DSP CPU(FRONT)
BCLKX1
BFSX1
BDX1
BDR1
T1
T2
LVA
VOL1
VCC
8V
D1008
Q1011
Q1018,Q1021
T8V T8
REG
DMO
Q1013
Q1016
LINEAR
R8
R8V
REG
CODEC
Q1014
Q1015
TX/RX
W/N SW
+5V +5
REG
SW
Q1017
Q1019
+3
+3.3V
REG
CPU3.3V
D24
D25
D26
D28
RA30H1317M1A(#01,#02)
IC3 D32
PWR ANT
LPF LPF
AMP SW
Q22
IC2
AGC APC
AMP
TA75S01F
Q20 D31 D37
RF
BPF BPF
AMP
HVC375B
EAFO
to ACC
IC1009
AF
TA75S01F LA4425A
AMP
D1007
Q1008
Q1012 AFO
AF AFON
MUTE from VOL IC
G
IC7
IC53
MICI MIC
AMP
MCG0 (Mic Gain
MCG1 Control)
from/to
DSP IC
PLL IC
SSO,SSK,DAST CPU
RORES
IC51
IC1002
VCC
TXC +8 VCC
8V REG
Q1001
Q1003
8V HV
VCC POWER
RXC SW PWON
8V IC1001
+3
REG CRES
XC6408EN22PR
8V
W2
136-174MHz
LPF
D27
D29
D35
DET
PWR
Q23
MUTE TMUT
SW
T1 from VOL IC
J1002
SP
J1
AFO
3017-8821
MIC
8V
MIC
PTT JACK
CLI CLO
D60
CSFT SHIFT
SW FRONT UNIT
X51
12.288MHz
Q5 DS1-9
LIGT2 LIGT
CTRL LNJ426W83RA
Q1
Q2
LINH LIGT1 DIM
LCS CTRL
LCK IC6 DS11
LSO
LCD COM1-4
DRIVER SEG1-33
LCD
IC52
ESDA
ESCL
EEPROM
R1EX24512ASAS0A
KEYX6
KR0-3,UP,DN
S2-S7
PUSH1
POSW
POSW S1
PUSH1
POWER SW
AFVI
AF VR
R14