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SERVICE

MANUAL

UHF TRANSCEIVERS

S-14304HZ-C1
July 2006

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Summary of Contents for IC-F4021S

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

Page 2: ...ODUCTION 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 force any of the variable components Turn them slowly and smoothly 4 DO NOT short any circuits or electronic parts An insulated turning tool MUST be used for all adjustments 5 DO NOT keep power ON f...

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 ADJUSTMENT 6 5 6 4 RECEIVE ADJUSTMENT 6 6 SECTION 7 PARTS LIST SECTION 8 MECHANICAL PARTS AND DISASSEMBLY SECTION 9 SEMICONDUCTOR INFORMATION SECTION 10 BOARD LAYOUTS SECTION 11 BLOCK DIAGRAM SECTION 12 VOLTA...

Page 4: ...re 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 than 40 dB 46 dB typ Narrow More than 34 dB 40 dB typ Residual modulation with CCITT filter Wide More than 45 dB 55 dB typ Middle More than 43 dB 53 dB typ Narrow More than 40 dB 50 dB typ Limiting chara...

Page 5: ...r 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 regulator Q24 2SA1577 Ceramic filter 450 KHz FI2 CFWM450F CPU5 regulator IC17 NJM2870 PLL IC IC2 MB15A02PFV1 AF amplifier IC15 TA7368FG IF amplifier Q7 2SC5107 IF IC IC9 TA31136FNG Pre drive amplifi...

Page 6: ...ob 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 e Unscrew 6 screws J r Remove the side plate I t Unsolder 8 points K and remove the shield cover y Unsolder 8 points L and take off the MAIN UNIT in the direction of the arrow Continued to right abov...

Page 7: ...hen 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 board at MIC and DISC as below This modification is not necessary for UT 108R installation r Install the unit as below Re solder t Remove the paper backing of the supplied unit cover and attach the un...

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 UNIT The 1st IF signal is converted into the 2nd IF signal and demodulated The 1st IF signal from the 1st IF amplifier is applied to the 2nd mixer in the FM IF IC IC9 pin 16 and converted into the 450...

Page 9: ... signals 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 MICROPHONE AMPLIFIER CIRCUITS MAIN UNIT The AF signals from the microphone MIC signals are filtered and level adjusted at microphone amplifier circuits MIC SIGNALS MIC signals from the microphone ar...

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 and power Q701 amplifiers to reduce increase the gain of these amplifiers for stable transmit output power The transmit power muting is carried out by the TX mute switch MAIN UNIT Q46 using the TMUT si...

Page 11: ...applied 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 the reference frequency signal from the reference frequency oscillator X2 at the phase detector The phase difference is output from pin 5 as a pulse type signal after being passed through the internal ...

Page 12: ...8 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 circuits Receive circuits R5V IC22 Battery pack 5 4 POWER SUPPLY CIRCUITS Voltage from the attached battery pack is routed to whole of the circuit in the transceiver via a switch and regulators ...

Page 13: ...Q40 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 Pin No Port Name Description 89 DIGI Outputs Analog Digital select signal to the A D switch D2 D3 High Digital mode is selected 91 LSO Outputs serial data to the LCD driver IC20 pin 48 92 LSCK Outpu...

Page 14: ...he adjustment 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 be started CAUTION BACK UP the originally programmed memory data in the transceiver before programming the adjustment frequencies When program the adjustment frequencies into the transceiver the t...

Page 15: ...ransmit 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 generator AC millivoltmeter To MIC jack To MIC GND To SP CONNECTION JIG CABLES 3 conductor 3 5 d mm plug SP CLONE OPC 478 U GND SP JIG cable 2 JIG cable 2 conductor 2 5 d mm plug MIC GND 33 kΩ to the audio g...

Page 16: ...erify 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 voltage w e r t y u i 1 2 0 q w e r t y u i 4 5 6 o 3 o 0 1 2 3 4 5 Receive sensitivity Automatically 6 PC SCREEN EXSAMPLE ...

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 Reload F5 button then check the LVIN item on the CS F3020 ADJ s screen 2 8 4 0 V Low band 3 0 4 2 V High band Verify 2 Channel Transmitting CH 2 3 0 4 2V Low High bands Verify REFERENCE FREQUENCY REF 1...

Page 18: ...d 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 3 Channel Transmitting CH 7 3 15 to 3 25 kHz MODULATION BALANCE BAL 1 Channel CH 5 Top panel Connect the FM deviation me ter to the antenna connector through an attenuator Set to square wave form No...

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 connector and set as Frequency Level Modulation Deviation Receiving 400 000 MHz Low 450 000 MHz High 23 dBµ 84 dBm 1 kHz 3 5 kHz 2 Set the SSG as Level Receiving 7 dBµ 114 dBm Push the ENTER key on the ...

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 2 31 L7 6200010210 S COL C2012C 22NG A B 99 8 34 6 L8 6200010210 S COL C2012C 22NG A B 95 3 36 8 L9 6200010030 S COL C2012C 15NG A B 89 2 38 4 L11 6200010850 S COL LQW18AN22NG00D B 87 8 32 1 L12 620...

Page 21: ...B 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 ORDER DESCRIPTION M H V NO NO LOCATION R202 7030004980 S RES ERJ2GEJ 101 X 100 T 96 6 38 1 R203 7030010040 S RES ERJ2GEJ JPW B 58 4 25 4 R209 7030005070 S RES ERJ2GEJ 683 X 68 k B 47 2 41 3 R210 703...

Page 22: ...13 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 ECJ0EC1H120J B 73 8 34 3 C116 4030016790 S CER ECJ0EB1C103K B 75 6 34 3 C117 4030017730 S CER ECJ0EB1E471K B 76 9 32 9 C118 4030017530 S CER ECJ0EC1H0R5B B 73 5 27 9 C119 4030017460 S CER ECJ0EB1E102K B...

Page 23: ...930 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 ECJ0EB1A104K B 65 8 15 C393 4030016930 S CER ECJ0EB1A104K T 78 15 3 C394 4030016930 S CER ECJ0EB1A104K T 70 6 15 2 C395 4030017420 S CER ECJ0EC1H470J B 92 4 34 2 C396 4030017350 S CER ECJ0EC1H020B B 90 9 18...

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 101 X 100 B 90 9 20 6 R31 7030004980 S RES ERJ2GEJ 101 X 100 B 86 4 24 8 R32 7030010040 S RES ERJ2GEJ JPW T 91 7 25 R33 7030010040 S RES ERJ2GEJ JPW T 89 1 14 6 R34 7030008300 S RES ERJ2GEJ 184 X 180 k...

Page 25: ...7 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 11 3 R276 7030005160 S RES ERJ2GEJ 105 X 1 M B 7 1 14 2 R277 7030005160 S RES ERJ2GEJ 105 X 1 M B 10 6 37 R278 7030005160 S RES ERJ2GEJ 105 X 1 M B 14 5 40 1 MAIN B UNIT for High band REF ORDER DESCRI...

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 LOCATION C232 4030016790 S CER ECJ0EB1C103K B 85 6 9 2 C233 4550007090 S TAN TEESVA 1A 226M8R B 98 16 8 C234 4030016790 S CER ECJ0EB1C103K B 102 4 25 4 C235 4030016790 S CER ECJ0EB1C103K B 97 8 21 3 C2...

Page 27: ...4 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 7030003320 S RES ERJ3GEYJ 101 V 100 B 32 2 11 4 R702 7030009140 S RES ERJ2GEJ 272 X 2 7 k T 29 2 15 4 R703 7030005120 S RES ERJ2GEJ 102 X 1 k B 28 5 15 7 R704 7030005530 S RES ERJ2GEJ 100 X 10 B 19 ...

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 C711 4030006980 S CER C1608 CH 1H 070D T T 26 1 13 7 C712 4030007020 S CER C1608 CH 1H 120J T T 22 5 13 7 C715 4030017460 S CER ECJ0EB1E102K B 18 6 12 7 C716 4030016790 S CER ECJ0EB1C103K B 18 6 13 6 P...

Page 29: ...003440 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 7030000010 S RES MCR10EZHJ JPW B 28 1 42 2 R40 7030000010 S RES MCR10EZHJ JPW B 27 7 8 4 R41 7030000010 S RES MCR10EZHJ JPW B 34 6 9 2 R42 7030008240 S RES ERJ12YJ0R00U B 38 9 7 4 R43 7030000010 S RES...

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 018540 1 R315 7210003061 Variable resistor TP76N00N 15F A103 2251A 1 DS3 5030002760 LCD L3 0200HAY 3 1 MC1 7700002480 Microphone SKB 2746 LPC 1 S2 2260002840 Switch SKHLLFA010 1 EP7 8930063020 LCD contact...

Page 31: ...C 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 MP36 C MP16 C MP24 C MP25 C J702 P MP2 C MP12 C The shape is depending on the version 120 4 23 32 3 7 9 64 15 4 39 64 53 2 3 32 17 8 45 64 32 5 1 9 32 38 9 1 17 32 1 7 1 16 5 2 13 64 1 7 1 16 2 4 3 32 ...

Page 32: ...06 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 Symbol LL Symbol R25 Symbol 24 Symbol MFO Symbol WB Symbol KN Symbol XY Symbol UF Symbol UG Symbol K2 Symbol RD07MVS1 Symbol 6A Symbol 6C Symbol 8L Symbol 8C Symbol 9H Symbol 5C Symbol 5O Symbol 5N A C...

Page 33: ...ITCH 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 H10 H15 H0 V5 V10 V0 2 1 J901 VCC VCC to PA unit GND BATT to Battery Connector J2 CHASSIS H5 H10 H0 V5 V10 V15 V0 TX GND ANT J1 CHASSIS to PA unit DC IN No patterns MAIN UNIT TOP VIEW ...

Page 34: ...WITCH 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 ISENS to MAIN unit TX GND VCC VCC to ANT unit to CONNECT unit J901 PA UNIT BOTTOM VIEW H5 H10 H15 H0 V5 V10 V0 H5 H10 H0 V5 V10 V15 V0 CONNECT UNIT BOTTOM VIEW ANT UNIT BOTTOM VIEW BC 160 BOTTOM VIEW ...

Page 35: ...31 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 UNR9213J A D SW Q9 DTA114EU D2 DAN222 D3 DAN222 LPF LIGT Q45 UNR9113J DS1 LNJ310M6URA DS2 LNJ310M6URA MONI SW S5 SW 167 EMER SW S1 EVQ PUL BPF BPF D24 HVC350B D25 HVC350B S5 REG Q23 2SA1577 CPU5 REG IC17...

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 P P P P P 2 K P P P K 2 P P P 0 P P P P P M N 54 6 633 2 K 2 3 3 54 60 6 K 4 54 0 2 K 7 2 K K 2 2 K 2 2 K 6 K 2 6 54 6 2 K 2 P 2 K 2 K 2 2 K 2 K 2 K 2 K 2 K 2 K 2 K 2 2 K 2 K N N P P P P 2 K 2 2 K N...

Page 37: ...5p 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 82µH Q702 RD01MUS1 C720 33p H 39p L C706 1p C705 1p H 6p L C744 4p C745 1 5p H 2 5p L C711 7p C709 5p H 7p L Q701 RD07MVS1 APC APC TX GND VCC T5V T5V T5V P_DET T5V T5V D704 MA2S077 C752 0 001 H 12p L L712 22nH D705 MA2S728 J702 1 2 3...

Page 38: ...0543 TE1 1 VO 2 GND 3 CD 4 VOR 5 VIN R50 ERJ12 JPW L2 0 47µ 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 MCR10 JPW R55 MCR10 JPW R52 MCR10 JPW R44 MCR10 JPW R45 MCR10 JPW R49 MCR10 JPW R46 MCR10 JPW R54 MCR10 JPW R56 MCR10 JPW R57 R20 33k R58 MCR10 JPW R59 MCR10 JPW R60 R62 MCR10 JPW R63 MCR10 JPW MCR10 J...

Page 39: ...enwood 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 Australia Phone 61 03 9549 7500 Fax 61 03 9549 7505 URL http www icom net au E mail sales icom net au 146A Harris Road East Tamaki Auckland New Zealand Phone 64 09 274 4062 Fax 64 09 274 4708 URL http www i...

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

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