Block Diagram - Icom IC-U82 Service Manual

SECTION 10

BLOCK DIAGRAM

• MAIN UNIT
IC16: SN74AHC2C53HDCTR
IC23:
LMV321IDCKR
SW
AMP
+5V
OPTION
UNIT
DATA
J7:
HSJ1621-019011
232TX
DIGI/AN
232RX
MICOUT
S801:
TP70N00E20-15F DIGI/AN
DICK
UP
E
DIUD
DN
MIC:
KUC3523
D34: MA8056 IC13 1/4:
PTT
Q17: UN911FJ CD4066BPWR
S3
PTT
CONT
PTT
MIC
JACK IC13 1/4: CD4066BPWR
OPT SW5V
MIC
J2:
HSJ1122-010010
Q73: 2SC4617
IC5: NJM2070M
SP1
AF
AMP
SP
JACK
Q31: UNR9210J
D27: MA742
CLONE
CLONE
BUFF
J3:
HSJ1456-010320
VCC
IC12: S-812C50AMC
Q55: 2SB1132
BATT
CPU5
Q56: UN9213J
Q57: XP1501
REG
D39: 1SS400
GND
D64, D71: 1SS400 Q34: 2SK1069
UNLOCK DC
DET
AMP
X4: CR-783
(15.3 MHz) IC19: MB15E03SLPFV1
D0
REF PLL LOOP
FC
IC FIL
OSC
SW5V
IC10 4/8:
M62363FP
RMOD
X3
LOOP
D/A BPF IC20: SN74AHC1G66HDBVR
DTCS
SW
AMP
Q81: 2SC4116
Q82: 2SC4116
PLLSW
LPF
2nd Lo
45.90 MHz
IC15:
CD4066BPWR
SQLIN
DI/AN
FM IF IC
SW
DET
AMP
IC25:
LMV321IDCK
IC15 2/4:
CD4066BPWR
FI2: ALFY450F=K
DI/AN
CERAMIC
SW BPF
SICO
AFOUT
MICOUT
MICIN
IC14 1/4: IC13 1/4: IC14 1/4: IC14 1/4:
CD4066BPWR CD4066BPWR CD4066BPWR CD4066BPWR
THROUGH SECRET UN_SEC SECRET DI_SEC
SW SW SW
SW SW
SECRET UN_SEC
THROUGH SECRET DI_SEC
IC17: AN6123MS IC13 1/4: CD4066BPWR Q67: UMG2N
ALC ALC ALC CUTOFF
SW AMP SW SHIFT
ALC DIGI_AN
ALC
IC10: M62363FP 1/8
VOLOUT VOLIN
EMPHASIS
D/A
SW
SW5V R5 PS5
T5
Q22: 2SA1576 Q21: 2SA1576 Q54: 2SA1576
SW5 T5
R5 PS5
REG REG
REG REG
PWRON T5C R5C
PS5C
10 - 1
UNLK
LVIN
Tx: 400.000–479.000 MHz
Rx: 353.650–432.650 MHz
D3: 1SV308
D4: MA2S077
MOD
LO TX/RX
BUFF
AMP SW
VCO
D59, D60: HVC375B Q75: 2SC5231 Q74: 2SC5231
D61: 1SV286
Q76: 2SC5231
PSVCO
LPF
BUFF
Q5: 2SC5006
R5
R5
IC2: TA31136FN
Q14: 2SC5006 D63: DA221 FI1: FL-335
XTAL
IF
LIMIT
AMP BPF
46.350 MHz
SD, NOIS
X3:
CDBC450KCAY24
W/N SW
Q65: 2SC4116
IC14 1/4: IC3 1/4:
CD4066BPWR LMV324IPWR
AN
HPF
SW
AN
IC3 1/4: LMV324IPWR
HPF
IC3 1/4: LMV324IPWR
ANALOG SW
LPF
IC4: CD4066BPWR
CUTOFF
SHIFT
Q11: XP4601 Q63: 2SA1576 Q64: 2SA1576
REFMOD
VCO5 ALC
AMP
REG REG
REG
PSVCO
THROUGH REFMV
T5 T5 VCC VCC
Q3: 2SC5107 Q83: 2SC4226 Q2: RD01MUS1 Q1: 2SK3476
PRE
PWR
BUFF DRIVE
DRIVE
AMP AMP
IC3: LMV324IPWR
Q37 : UNR9113J
D32, D33: MA742
PS5 APC PWR
CTRL
DET
1st Lo
R5
D11, D12, D65:
HVC350B
RF
BPF LIMIT
AMP
Q13: 3SK318
Q12: 3SK318 D50: MA728
SW5V
DET
TEMP.
TONE
Q53: XP4601
SENS.
FIL
DET
LVIN
UNLK
BATT
VCC
CPU
IC8: M30220MA
Q38: UNR9213J
SICO
CTCSS
CTCSS
LPF
SW
TONE
EEPROM
Q68: UNR9213J
IC7: S-24CS64A0I
+5V
D51: 1SS400
Q16: XP6501
Q61: 2SA1576
Q15: 2SB1132
Q62: 2SC4116
RESET
OPTION
AF
REG
REG IC21: BD5242G
VCC VCC AFON
ANTENNA
D1, D72: 1SV307 Tx: 400.000–479.000 MHz
D2, D8: MA77 Rx: 400.000–479.000 MHz
ANT
LPF LPF
SW
LPF
IC10 3/8: M62363FP
D/A
R182: NTCG16
TXC
CSHIFT CLOCK
D56: HVC376B
SHIFT
X2: CR-739
(9.8304 MHz)
LEDC VCC
DS4: A01B001X
LCD
LIGHT
Q25: 2SC4116
DS2, DS3: LNJ310M6URA
INITIAL/KEY MATRIX
D45–D49: 1SS400
D66–D70: 1SS400
Explanatory notes
TX LINE
RX LINE
COMMON LINE
CONTROL LINE
MAIN UNIT