Block Diagram - Icom IC-2300H Service Manual Addendum

SECTION 9.

BLOCK DIAGRAM

SW5V
LVIN(CPU A/D)
DC AMP
Q10
REFMOD(D/A)
(15.3MHz)
REF
OSC
FC(D/A)
X1
PLLCK
R5V PLLDATA
PLLSTB
X3 BPF
Q1
TX
RX
COMMON
Q4,D1-D2,D5-D6
DATA
CERAMIC
BPF
FI1
SW5V
SW5V
EXT MIC
MIC MICAF MIC MICAF IC28
JACK AMP ANALOG SW
IC3a
SW5V VCO8
PLLSW(EXP)
SHIFT(EXP)
LOOP VCO VCOR8
SW SW VCOT8
IC4 Q6-Q8
PLL LOOP
IC FIL
Q14,D10-D11
IC1
FIN
UNLK
Q13,D7-D9
MOD
R5V
R5V
IC3 IF
AMP
IF DET-IC Q27 D17
Q9
W/N X2
SW
W/N
CTRL.
CERAMIC
BPF
NWC(EXP)
FI2
SW5V
MICAF/RXAF VOLOUT(VOUT2)
IC25
ELEC. VOL
TXAF
(VOUT1)
SW5V SW5V
TXAF IC6
IDC
ANALOG SW
IC3d
SW5V
HPF
IC3c
DETO
MICDATA
BUFF
IC24,D1
PTT SW
Q1,D2
9 - 1
MAIN UNIT
R5V T8V
VCO8 SW5V T8V
LO TX/RX
BUFF
BUFF
AMP SW
Q17 Q21
IC10 D12-D13
Tx;136.000-174.000MHz
Rx;136.000-174.000MHz
LPF
46.35MHz
XTAL
LIMIT BPF
BPF
Q28
D22,D34
FI3
T1_ID(D/A)
R5V
T2_APC(D/A)
T3_REF_V(D/A)
W/N
R5V
WNC CTRL.
Q11
REG
MOD
SQLIN
LOGIC UNIT
REFMOD
D/A
DETIN
MODIN
SW5V
TXAF/RXAF
LPF
TXAF/RXAF
IC3b
AFMUTE
RMUTE
MODMUTE
MMUTE
LPF LPF
MICUD
Q3
TEMP
IDET
HVIN
PLLCK,PLLDATA,PLLSTB
UNLK
VOLCK,VOLDATA
SD/NOIS
LVIN
REMO
PTT
DATA,EXTSTB,EXTCK,OE
EXTSTB,EXTCK,OE CONT1,CONT2
Q's
EXP EXP
IC30
PORT PORT
IC29
CLSHIFT,DUSE, HEL,THROUGH,
MODMUTE,AFMUTE, GRE,AMB,DIM0,DIM1
CONT1,CONT2
MMUTE,RMUTE INT_SP,EXT_SP
IDET(CPU A/D)
HV
CURRENT PAHV
DET
T8V SURGE IC9d T8V
PROTECT
D16
PRE PWR
DRIVE ANT
DRIVE
AMP
AMP SW
Q22 Q26 Q29
D24-D25
D29-D32
T2_APC(D/A)
APC
TXMUTE(EXP)
CTRL
IC9b,Q31
R5V
RF
BPF ATT LIMIT
AMP
Q32 IC9c,D26
D23 D28
T3_REF_V(D/A) SQLATT(D/A)
SW5V T8V VCO8 +8V SWHV
R5 +5 T8 VCO +8
REG REG REG REG
Q12,Q39 Q5,D4
Q15-Q16 Q2-Q3 IC6
RXC(EXP) T8C(EXP)
NWC
TXMUTE RXC
C5V PLLSW T8C
HVSW
SPMUTE SHIFT
SQLATT
T1_ID
C5V
T2_APC
T3_REF_V
PWRON(CPU)
FC EXP
PORT
IC5 IC2
SPMUTE(EXP)
DASTB SW5V
EXTSTB
DATA SWHV
EXT_SP(EXP)
EXTDATA
EXTCK
EXTCK
OE
SP AF SP
MUTE AMP SW
IC7
Q20 Q36-Q38
INT_SP(EXP)
SP
SW
Q33-Q35
LPF
SW5V SW5V
VOL SQL
DUSE(EXP)
DTCS
SW
Q2
DICK,DIUD
CLONE
CLIN,CLOUT
BUFF
Q5,D6,D37
IC1
CPU SEG1-SEG36,COM1-COM4
KS0-KS1,IS0-IS2,KR0-KR3
ESCK,ESDA
EEPROM
C5V IC5
9.8304MHz X1
CLOCK
RESET
SHIFT
DIMMER
/COLOR
D25 IC4
CLSHIFT(EXP)
Q7-Q8,Q10-Q11
AMB,GRE,DIM0,DIM1(EXP)
RX/Tx;136.000-174.000MHz
ANTENNA
LPF
PWR
DET
D27,D33
C5V HV
C5V
REG
IC8
Q23-Q25
W6
REVERSE
& OVER
VOLTAGE
PROTECT
D19
AF OUT
SP
CLONE
J3
SP1
DIAL:S9
LCD
DS1
INT/KEY
MATRIX
D7-D9,D12-D13,D16-D17
D21-D23,D27-D28
+8V
BACK
LIGHT
DS3,DS5-DS9