Icom IC-F4021T Service Manual Download

Page: 35 / 40

SECTION 11

BLOCK DIAGRAM

11 - 1

Explanatory notes

+B LINE

LPF

ANT

LPF

IC6
LM2902PWR

LPF

IC6
LM2902PWR

LPF

IC7
NJM12902V

RESET

IC8
BD5242G

SHIFT

D6
MA2S077

ANT

D701
1SV307

PWR
AMP

Q701
RD07MVS1

TX/RX

D16:1SV307
D17: MA2S077

RX VCO
Q17
2SC4226

TX VCO
Q16
2SC4226

RIPPLE

FIL

Q20
2SC4116

FIL

LOOP

PLL
IC

IC2
MB15A02PFV1

Q22
2SC5006

X1
CDBKB450KCAY24

X6
CR-774
12.288MHz

AMP

IC5
NJM13403V

MOD

D12
MA368

Q6
3SK324

BPF

D14: HVC350B
D29: HVC350B

BPF

D15
HVC350B

BPF

D19: HVC350B
D20: HVC350B

BPF

AMP

Q5
3SK293

APC
AMP

IC701
TA75S01F

XTAL

BPF

FI1
FL-335

AMP

Q7
2SC5107

CERAMIC

BPF

FI2
CFWM450F
450KHz

Q47
UNR9213J

AMP

IC15
TA7368FG

SP1

BUFF

Q29
2SC5700

BUFF

Q15
2SC5006

BUFF

Q21
2SK880

FIL
SW

Q40
UNR9213J

DRIVE
AMP

Q702
RD01MUS1

MC1
SKB-2746

PTT SW
S2

PTT
DET

Q43: UNR9111J

AF VOL

R315

TP76N00N

TCXO

PWR
CTRL

Q42: 2SB1132
Q41: XP6501
D23: MA2S111
D21: DAN222

PRE
DRIVE

Q703
2SC3356

TLV

ADJ

D10: HVC350B
D13: HVC350B

RLV
ADJ

D9 : HVC350B
D11: HVC350B

HPF

IC5
NJM13403V

MIX

IC5
NJM13403V

R256
ERTJ0EP473J

J2
HSJ1456-010320

HSJ1102-018540

Q44: UNR9210J
D28: RB706F

CLONE

BUFF

J4
BM02B-ASRS-TF

1
2

LPF

HPF

IC5
NJM13403V

RXMUTE

Q32: 2SK3019
Q33: UNR9213J

MUTE

Q46
UNR9213J

PWR

DET

D702
RB706F

PRE
DRIVE

Q704
2SC5006

BATTERY_1

BT3

F701

0467003.NR

1 2

BUFF

IC7
NJM12902V

CERAMIC

BPF

FI3
SFPC450H

LCD

DRIVER

IC20
LC75834W

LCD

DS3

KEY

MATRIX

BUFF

IC6
LM2902PWR

Q35
UNR9213J

ALC

IC24: AN6123MS

MIC

MUTE

Q31: 2SK3019

A/D
SW

IC25: TC7W53FK

AMP

IC7
NJM12902V

EEPROM

IC10
HN58X2464TI

IC23
M62334FP

D/A

DAFO

Q36: 2SK3019
Q37: UNR9213J

TX/RX

Q18: XP1214
Q19: UNR9213J

Q14
2SC5700

GAIN

Q34: 2SK3019
Q35: UNR9213J

A/D
SW

Q9: DTA114EU
D2: DAN222
D3: DAN222

LPF

LIGT

Q45: UNR9113J
DS1: LNJ310M6URA
DS2: LNJ310M6URA

MONI

S5
SW-167

EMER

S1
EVQ-PUL

BPF

D24: HVC350B
D25: HVC350B

REG

Q23
2SA1577

CPU5

REG

IC17
NJM2870

REG

Q24: 2SA1577

REG

Q25: 2SA1577
Q48: UNR9213J

REG

Q26: 2SB1580
Q27: XP6501
Q28: UNR9213J

BIAS

IC7
NJM12902V

SDEC

CDEC

RES

CENC0-2
REM

SENC

D/A

IF IC

IC9: TA31136FNG

LVIN

S5V

R5V

CTCSS/DTCS

DUSE

CONTROL LINE

COMMON LINE

TX LINE
RX LINE

DATA LINE

APC

TMUT

NOIS

CPU

IC22

IC12
M62364FP

REF

BAL

15.3 MHz
X2
CR-783

45.9 MHz

SQLC

46.35 MHz

TONE

CTCSS/DTCS
DECODE
Q39
XP4601

MAIN UNIT

CSFT

MIX

MOD

BEPO

CTCSS/DTCS

MODI

IC3
CD4066BPWR

ANALOG

TEMP

OPTION CONNECTOR

AFON

BEPO

BUSY

DISC AFOUT

PTTI

PTTO

MCIN

MCOT

SIGO

AXK540145J

OPTION

CONNECTOR

AFON

AFON1

PTTO

CLO

CLI

BEEPO

PTTI

PTTO

DISC

MCIN

MCOT

VCC

ANT UNIT

PA UNIT

RSSI

DMO

DMI

OPTION CONNECTOR

DMO

DMI

DAFO

VCC

DAFO

T5V

MMUTE

DIGI

RMUTE

EXT SPEAKER

MMUTE DIGI

RLVA

TLVA

RLVA

CONNECT

UNIT

R5V DIGI

W/N
SW

NWC

RMUTE

SCK
DSDA

MCGO

DIGI

EXT MIC

MIC

AFOUT

CLONE

MMUTE

SIGO

BEEP

BEEPO

D_IF

S5V

AFOUT

VREF

APCV

R315

+5V

LIGT

DIGI

TONE

+5V

MONI

EMER

353.65-423.65 MHz (400-470MHz)
403.65-465.65 MHz (450-512MHz)
403.65-473.65 MHz (450-520MHz)

400-470 MHz
450-512 MHz
450-520 MHz

S5C

+5V

CPU5

T5C

PWON

CPU5

S5V

R5C

R5V

+5V

VCC

T5V

+5V

VCC

+5V

ESDA
ESCL

CPU5

KRO-3
KSO-4

+5V

BIAS

Summary of Contents for IC-F4021T

Page 1: ...SERVICE MANUAL UHF TRANSCEIVERS S 14304HZ C1 July 2006...

Page 2: ...DUCTION CAUTION ORDERING PARTS 1 Make sure a problem is internal before disassembling the transceiver 2 DO NOT open the transceiver until the transceiver is disconnected from its power source 3 DO NOT...

Page 3: ...PLL CIRCUITS 5 4 5 4 DIGITAL CIRCUITS 5 5 5 5 POWER SUPPLY CIRCUITS 5 5 5 6 PORT ALLOCATIONS 5 5 SECTION 6 ADJUSTMENT PROCEDURES 6 1 PREPARATION 6 1 6 2 FREQUENCY ADJUSTMENT 6 4 6 3 TRANSMIT ADJUSTMEN...

Page 4: ...ore than 70 dB 75 dB typ Middle More than 70 dB 73 dB typ Narrow More than 60 dB 68 dB typ Audio harmonic distortion 3 typ with 1 kHz AF 40 deviation FM hum and noise without CCITT filter Wide More th...

Page 5: ...IC12 M62364FP Crystal oscillator 15 3 MHz X2 CR 783 VCO circuits RX VCO Q17 2SC4226 D9 D11 HVC350B TX VCO Q16 2SC4226 D10 D13 HVC350B R5 regulator Q25 2SA1577 Q48 UNR9213J S5 regulator Q23 2SA1577 T5...

Page 6: ...b B w Unscrew 2 screws C and remove the jack panel e Unscrew 2 screws D and unplug the connector E from the chassis unit r Take off the chassis unit in the direction of the arrow from the front panel...

Page 7: ...en uninstalling the unit Be sure to re solder the cut points as below when you remove the unit Otherwise no transmit modulation or receive AF output is available DISC MIC e Cut the pattern on the PC b...

Page 8: ...IF filter FI1 to filter out adjacent signals then applied to the 1st IF amplifier Q7 The amplified 1st IF signal is then applied to the FM IF IC IC9 pin 16 5 1 4 2nd IF AND DEMODULATOR CIRCUITS MAIN U...

Page 9: ...ignals in the demodulated AF signals are passed through the LPF IC6 pins 5 7 to remove unwanted components voice signals then applied to the CPU IC22 pin 45 and decoded 5 2 TRANSMITTER CIRCUITS 5 2 1...

Page 10: ...as the reference voltage The APC amplifier compares the detected voltage and reference voltage and the difference of the voltage is output from pin 4 The voltage controls the bias of the drive Q702 an...

Page 11: ...pplied to the PLL IC IC2 pin 8 The applied signal is divided at the prescaler and programmable counter according to the SSO signal from the CPU IC22 pin 99 The divided signal is phase compared with th...

Page 12: ...22 87 88 T5C R5C T5V LED backlight driver Q45 LCD driver IC20 D A converter IC12 etc CPU IC22 EEPROM IC10 Reset IC IC8 etc Drive amplifier Q702 Power amplifier Q701 etc PLL IC IC2 VCO s etc Transmit...

Page 13: ...40 High While DTCS is in use 75 NOIS Input port for noise signal from the FM IF IC IC9 pin 13 82 ESDA Outputs serial data to the EEPROM IC10 pin 5 85 ESCL Outputs clock signal to the EEPROM IC10 pin 6...

Page 14: ...djustment frequencies and settings into the transceiver and set the configuration using the CS F3020 CLONING SOFTWARE before starting the software adjustment Otherwise the software adjustment can not...

Page 15: ...ansmit while the SSG is connected to the antenna connector SINAD meter Speaker 8 To SP jack JIG cable 2 JIG cable 1 PC to USB port to RS 232C port OPC 478 RS 232C type OPC 478U USB type Audio generato...

Page 16: ...rify Squelch EUR only CTCSS DTCS deviation FM deviation Narrow FM deviation Middle Wide Modulation balance Transmit output power Hi Transmit output power L2 Transmit output power L1 Tq PLL lock voltag...

Page 17: ...LOCK VOLTAGE can be adjusted automatically 1 Set the Lock voltage preset RX LVA and TX LVA to 179 3 15 V 2 Push the ENTER key on the connected PC s keyboard 1 Channel Receiving CH 2 PC screen Click Re...

Page 18: ...set as Frequency 1 0 kHz Level 150 mV rms Set the FM deviation meter to same condi tion as MODULATION BALANCE Transmitting WIDE MOD ratio 2 Channel Transmitting CH 6 4 05 to 4 15 kHz MIDDLE MOD ratio...

Page 19: ...ush ENTER key 2 The connected PC tunes BPF s to peak levels automaticaly S METER RSSI 1 Channel CH 1 Push the ENTER key on the connected PC s keyboard to set S3 level Connect the SSG to the antenna co...

Page 20: ...X1 6070000191 S DCR CDBKB450KCAY24 R0 B 80 16 9 X2 6050011940 S XTL CR 783 15 3 MHz F4021 F4023 only B 61 6 38 9 6050012380 S XTL CR 826 15 3 MHz B 61 6 38 9 X6 6050011830 S XTL CR 774 12 288 MHz B 31...

Page 21: ...56 8 24 4 R199 7030006610 S RES ERJ2GEJ 394 X 390 k B 58 4 24 4 R200 7030005030 S RES ERJ2GEJ 152 X 1 5 k B 11 2 32 3 R201 7030005050 S RES ERJ2GEJ 103 X 10 k T 96 6 39 1 MAIN A UNIT for Low band REF...

Page 22: ...3 4030017540 S CER ECJ0EC1HR75B B 71 6 30 4 C114 4030017570 S CER ECJ0EC1H040B B 72 4 32 9 S Surface mount MAIN A UNIT for Low band REF ORDER DESCRIPTION M H V NO NO LOCATION C115 4030017630 S CER ECJ...

Page 23: ...30 S CER ECJ0EB1A104K T 60 9 14 6 C388 4030016930 S CER ECJ0EB1A104K T 60 9 13 7 C390 4030016930 S CER ECJ0EB1A104K T 78 18 8 C391 4030016930 S CER ECJ0EB1A104K B 65 19 1 C392 4030016930 S CER ECJ0EB1...

Page 24: ...B 88 2 27 4 R26 7030008010 S RES ERJ2GEJ 123 X 12 k B 88 2 26 4 R27 7030005310 S RES ERJ2GEJ 124 X 120 k B 86 4 23 4 R28 7030005080 S RES ERJ2GEJ 823 X 82 k B 84 7 23 4 R29 7030004980 S RES ERJ2GEJ 10...

Page 25: ...R272 7030004980 S RES ERJ2GEJ 101 X 100 T 55 5 4 8 R273 7030005160 S RES ERJ2GEJ 105 X 1 M B 7 3 9 5 R274 7030005160 S RES ERJ2GEJ 105 X 1 M B 7 3 10 4 R275 7030005160 S RES ERJ2GEJ 105 X 1 M B 7 3 1...

Page 26: ...S CER ECJ0EB1C223K B 11 4 34 4 C230 4030016790 S CER ECJ0EB1C103K B 48 7 5 1 C231 4030016790 S CER ECJ0EB1C103K B 48 20 2 S Surface mount MAIN B UNIT for High band REF ORDER DESCRIPTION M H V NO NO LO...

Page 27: ...3 L708 6200005741 S COL ELJRE 47NGFA T 6 7 13 1 L709 6200008240 S COL 0 30 0 9 5TL 14N T 35 3 17 L712 6200010850 S COL LQW18AN22NG00D T 32 1 15 4 L713 6200011580 S COL LQW18AN33NG00D T 26 5 19 2 R701...

Page 28: ...C705 4030009510 S CER C1608 CH 1H 010B T T 31 5 12 9 C707 4030017460 S CER ECJ0EB1E102K B 28 16 9 C708 4030017460 S CER ECJ0EB1E102K T 28 5 13 8 C709 4030009920 S CER C1608 CH 1H 050B T T 27 4 13 7 C7...

Page 29: ...03440 S RES ERJ3GEYJ 102 V 1 k B 40 4 12 2 R36 7030000460 S RES MCR10EZHJ 4 7 k B 34 7 23 8 R37 7030005501 S RES ERA3YKD 124V 120 k B 33 6 21 3 R38 7030005671 S RES ERA3YKD 393V 39 k B 30 1 25 1 R39 7...

Page 30: ...nut Q 1 1 MP36 8930048870 2056 A sponge 1 MP37 8930070010 2893 VOL rubber 1 ORDER NO REF NO DESCRIPTION QTY CHASSIS PARTS J2 6450002250 Connector HSJ1456 010320 1 J3 6450000131 Connector HSJ1102 01854...

Page 31: ...MP26 C MP27 C MP27 C MP9 C MP10 C J2 C J2 M J3 M MC1 M MP8 M S2 M W1 C MP32 C UNIT abbreviations C CHASSIS PARTS M MAIN UNIT P PA UNIT CN CONNECT UNIT A ANT UNIT MP37 C MP21 C MP22 C MP34 C MP34 C MP...

Page 32: ...6 T1 2SC5107 O 2SC5700 2SK3019 2SK880 Y 3SK293 3SK324UG TL E RD01MUS1 RD07MVS1 UNR9111J UNR9113J UNR9210J UNR9213J XP1214 XP4601 XP6401 XP6501 AB Symbol HR Symbol BAR Symbol BN Symbol R25 Symbol BR Sy...

Page 33: ...TCH MIC 7 4 1 P0 P1 P2 P3 0 8 5 2 9 6 3 SECTION 10 BOARD LAYOUTS 10 1 BC 160 TOP VIEW ANT UNIT TOP VIEW CONNECT UNIT TOP VIEW PA UNIT TOP VIEW H5 H10 H15 H20 H25 H30 H35 H0 V5 V10 V15 V0 V25 V20 H5 H1...

Page 34: ...ITCH EXT SPEAKER SIDE3 ISENS TI GND RX to PA unit J702 VCC T5V GND TX to PA unit J701 10 2 H5 H10 H15 H20 H25 H30 H35 H0 V5 V10 V15 V0 V25 V20 1 4 J701 TX GND T5V VCC to MAIN unit 4 1 J702 RX GND TI I...

Page 35: ...1 2SK3019 A D SW IC25 TC7W53FK AMP IC7 NJM12902V EEPROM IC10 HN58X2464TI IC23 M62334FP D A DAFO SW Q36 2SK3019 Q37 UNR9213J TX RX SW Q18 XP1214 Q19 UNR9213J X2 Q14 2SC5700 GAIN SW Q34 2SK3019 Q35 UNR9...

Page 36: ...0 4 3 0 4 2 0 4 2 0 21 0 3 21 0 3 0 3 0 3 0 0 0 0 0 0 0 0 0 0 0 8 04 4 2 K 2 P P P 2 P P K 2 2 K K 2 0 3 N M M N 2 K P 2 2 K P P P 2 P P 2 K 2 K 2 K P 2 K 2 K 2 K 2 2 K 2 K 2 K 2 K K 2 K 2 K P 0 P 0 P...

Page 37: ...p L R731 10k R741 560 R801 82k R702 2 7k R747 10k C781 47p C806 1p C805 3p L L708 47nH L707 15nH H 18nH L L706 EXCCL3225U R744 330k APC 0467003 NR F701 HV 1 2 L701 0 82 H Q702 RD01MUS1 C720 33p H 39p...

Page 38: ...43 TE1 1 VO 2 GND 3 CD 4 VOR 5 VIN R50 ERJ12 JPW L2 0 47 ERJ12 JPW CP2 CP1 C20 560 0 01 0 0015 RSQ035P03TR Q2 1 2 3 4 5 6 R47 MCR10 JPW MCR10 JPW R39 MCR10 JPW R40 R51 MCR10 JPW R41 MCR10 JPW R43 MCR1...

Page 39: ...nwood Centre 150 6165 Highway 17 Delta B C V4K 5B8 Canada Phone 1 604 952 4266 Fax 1 604 952 0090 URL http www icomcanada com E mail info icomcanada com Unit 1 103 Garden Road Clayton VIC 3168 Austral...

Page 40: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14304HZ C1 2006 Icom Inc...

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