Icom IC-F70DT User Manual Download

Page: 1 / 42

SERVICE

MANUAL

VHF TRANSCEIVER

Summary of Contents for IC-F70DT

Page 1: ...SERVICE MANUAL VHF TRANSCEIVER...

Page 2: ...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 a...

Page 3: ...PORT ALLOCATIONS 4 5 SECTION 5 ADJUSTMENT PROCEDURES 5 1 PREPARATION 5 1 5 2 SOFTWARE ADJUSTMENT 5 4 SECTION 6 PARTS LIST SECTION 7 MECHANICAL PARTS AND DISASSEMBLY SECTION 8 SEMICONDUCTOR INFORMATIO...

Page 4: ...io harmonic distortion 3 typ at 40 deviation Limiting charactor of modulator 60 100 of max deviation FM hum and noise Without CCITT filter 34 dB min 40 dB typ Narrow 40 dB min 45 dB typ Wide Audio fre...

Page 5: ...3SK293 D A converter IC310 M62334FP VCO circuit D A converter IC303 M62364FP DSP unit IC F70DS DT only Power amplifier Q13 RD07MVS1 ALC amplifier IC5 TA75S01F RF amplifier Q18 3SK293 D A converter IC3...

Page 6: ...nts I and remove the shield plate J 4 Unscrew 10 screws K and remove the MAIN unit from the CHASSIS REMOVING THE FRONT UNIT 1 Disconnect the speaker cable L from J201 2 Disconnect the cable M from J2...

Page 7: ...are converted into the 46 35 MHz 1st IF signal at the double balanced type 1st mixer IC14 L30 L31 L33 by being mixed with the 1st LO signal generated at the RX VCOs Q4 D4 D5 D24 D26 or Q20 D27 to D30...

Page 8: ...mutes AF output signals when no RF signals are received By detecting noise components in the demodulated AF signals the squelch circuit switches the AF mute swithch and AF power amplifier controller O...

Page 9: ...The CTCSS DTCS signals are generated by the CPU IC307 and output from pins 89 91 CENC0 CENC1 CENC2 The CTCSS DTCS signals are passed through 3 regis ters R374 R376 to change its wave form The wave for...

Page 10: ...st LO RX signal is applied to the 1st mixer IC14 L30 L31 L33 and the transmit TX signal is applied to the YGR amplifier Q11 4 4 Loop filter PLST SSO SCK 4 Q20 D27 D30 RX VCO 136 153 MHz Q4 D4 D5 D24 D...

Page 11: ...C7 and applied to the LINER CODEC IC DSP UNIT IC9 again The signal from the LINER CODEC IC IC9 pin 15 is passed through the LPFs DSP UNIT IC4 pins 3 4 5 7 and applied to the MAIN UNIT via J1 and then...

Page 12: ...erial data signal for the expander FRONT UNIT IC2 81 FSCL Outputs clock signal to the expander FRONT UNIT IC2 88 SIDE2 Input port for DOWN switch MAIN UNIT S2 Low While DOWN switch is pushed Pin numbe...

Page 13: ...hield Wiz ard Complete will appear Then click Finish u Eject the CD i Program group CS F70 F1700 ADJ appears in the Pro grams folder of the start menu and CS F70 F1700 ADJ icon appears on the desk top...

Page 14: ...ER n 7 7 REQUENCY COUNTER 3TANDARD SIGNAL GENERATOR 6 TO M6 n D M TO n D M 54 4 TRANSMIT WHILE THE 33 IS CONNECTED TO THE ANTENNA CONNECTOR 2 4 5 4 53 5 4 5 4 30 5 4 0 7 2 3500 9 6 0 5 2 CONNECTION DD...

Page 15: ...sensitivity for low edge automatic 4 Receive sensitivity for low edge manual 5 Receive sensitivity for high edge automatic 6 Receive sensitivity for high edge manual 7 PLL lock voltage adjust for RX m...

Page 16: ...ted PC s keyboard PLL LOCK VOLTAGE 1 Operating CH Receiving CH 2 PC screen Click Reload F5 button then check the LVIN item on the CS F70 F1700 ADJ s screen 3 2 3 4 V Verify 2 Operating CH Receiving CH...

Page 17: ...ctor through an attenuator Set to square wave form No audio applied to the JIG cable Set an FM deviation meter as HPF LPF De emphasis Detector OFF 20 kHz OFF P P 2 Push P0 while transmitting FM DEVIAT...

Page 18: ...Connect an FM deviation meter to the antenna connector through an attenuator 0 91 to 1 01 kHz Verify 2 Operating CH Transmitting CH 9 MOD Dig L 3 Operating CH Transmitting CH 10 MOD Dig H 4 Operating...

Page 19: ...desired w 2 Push ENTER key to start tuning w 3 Repeat w 1 and w 2 to perform additional BPF tuning Digital RSSI Dig RSSI 1 Operating CH CH 9 Put the cursor on Dig RSSI and push the ENTER key to set t...

Page 20: ...89 5 D29 1750000770 S VCP HVC376BTRF T 13 3 85 5 D30 1750000770 S VCP HVC376BTRF T 13 3 88 D31 1790001250 S DIO MA2S111 TX T 26 2 105 3 D301 1160000050 S DIO DAP202U T106 T 33 6 26 D302 1160000050 S D...

Page 21: ...02 8 R92 7030010130 S RES ERJ2GE 6R8 X 6 8 B 23 6 75 5 R93 7030009270 S RES ERJ2GEJ 821 X 820 B 23 1 74 2 R94 7030009270 S RES ERJ2GEJ 821 X 820 B 24 1 74 2 R95 7030004970 S RES ERJ2GEJ 470 X 47 B 27...

Page 22: ...7030005090 S RES ERJ2GEJ 104 X 100 k T 36 9 2 R439 7030005700 S RES ERJ2GEJ 274 X 270 k B 15 7 120 9 R440 7030010080 S RES ERJ2RHD 104 X 100 k B 14 3 121 8 R441 7030004980 S RES ERJ2GEJ 101 X 100 T 10...

Page 23: ...4030017580 S CER ECJ0EC1H060C T 40 2 88 4 C172 4030017460 S CER ECJ0EB1E102K T 38 90 1 C173 4030017420 S CER ECJ0EC1H470J B 40 1 88 8 C174 4030017580 S CER ECJ0EC1H060C T 39 7 91 C175 4030017490 S CER...

Page 24: ...4030017760 S CER ECJ0EB1H222K T 11 5 38 7 C410 4030017420 S CER ECJ0EC1H470J T 29 3 20 9 C411 4030017420 S CER ECJ0EC1H470J T 29 3 20 C412 4030017420 S CER ECJ0EC1H470J B 33 5 18 1 C413 4030017420 S...

Page 25: ...2GEJ 102 X 1 k B 27 2 42 1 R216 7030005120 S RES ERJ2GEJ 102 X 1 k B 13 6 49 2 R217 7030007340 S RES ERJ2GEJ 153 X 15 k B 10 2 64 5 R219 7030003860 S RES ERJ3GE JPW V B 7 3 64 3 R221 7030005090 S RES...

Page 26: ...M2711F TE1 T 24 2 29 7 IC12 1140011880 S IC HD64F2239TE16 T 11 8 30 4 IC13 1130003830 S IC TC7S04F TE85R B 11 6 22 5 IC14 1110005730 S IC S 80928CNMC G8Y T2 B 19 6 38 1 IC15 1130011600 S IC TC7MET541A...

Page 27: ...13 2 C32 4030016930 S CER ECJ0EB1A104K B 19 6 18 6 C33 4030016790 S CER ECJ0EB1C103K T 12 4 14 6 C35 4030017420 S CER ECJ0EC1H470J B 3 1 7 2 C36 4030017420 S CER ECJ0EC1H470J B 4 3 7 5 C38 4030017420...

Page 28: ...button 1 MP35 8930056540 Spring AH 2 MP39 8930063690 O ring BA 2 MP41 8930055730 2403 connector seal 1 MP43 8830001470 VR Nut N 2 MP44 8830002430 2803 ant nut 1 MP47 8810010480 Screw PH B0 M2 6 SUS S...

Page 29: ...C J2 C MC201 F MP1 F MP4 F DS2 F MP5 F MP3 F MP2 F MP41 C MP10 C IC F70DS S IC F70DT T FRONT UNIT MP49 C Unit abbreviations F FRONT UNIT M MAIN UNIT C CHASSIS PARTS V VR BOARD D DSP UNIT A ANT BOARD...

Page 30: ...03 TPC6103 UMG2N XP1214 XP6501 AB Symbol HQ Symbol BAQ Symbol BR Symbol LL Symbol LY Symbol QY Symbol R25 Symbol MFO Symbol MGO Symbol UB Symbol K1 Symbol XY Symbol UF Symbol 16 Symbol F12 Symbol 26 S...

Page 31: ...5 H10 H15 H20 H25 H30 H35 H40 H45 H0 V5 V10 V15 V0 V25 V30 V35 V20 V45 V50 V55 V40 V65 V70 V75 V60 V80 V90 V95 V100 V85 V105 V110 V115 V125 V130 V120 7 4 1 P0 P1 P2 P3 0 8 5 2 9 6 3 MP6 MP4 MP4 MP1 DS...

Page 32: ...SPEAKER CHASSIS SP1 W2 2 1 VDD1 1 8 to LCD DS2 J101 VDD2 3 RES SDA SCL VSS VSS V_LCD TP 1 20 J2 R8 R4 R2 R1 GND LED GND PWRSW 5V AFVI XRXD RESET MICE AFO DETECT VCC XTXD MIC EXPTT to VR board 30 1 to...

Page 33: ...C NC NC DFIL GND NC DTXD DRXD to Optional unit J1 GND CPU5 VCC AMMT AFONO BEPO ARMT DISC2 AFOUT REM CCS IRQA CSO ACSI CCK 1 15 30 16 PTTI PTTO MCOT MCIN NC BUSY NC SIG OPT1 OPT2 OPT3 GND OPV3 OPV2 OPV...

Page 34: ...V70 V75 V60 V80 V90 V95 V100 V85 V105 V110 V115 V125 V120 3 1 5 6 1 8 16 9 1 8 16 9 1 12 24 13 16 9 1 8 75 51 50 100 1 26 76 25 1 7 14 8 1 4 8 5 1 3 6 4 1 12 24 13 9 4 BOTTOM VIEW MAIN UNIT BOTTOM VI...

Page 35: ...GND LED GND POWER_SW 5V AFVI XRXD RESET MICE AFO DETECT VCC XTXD MIC PTT MULTI CONNECTOR VOLUME CONTROL ROTARY SELECTOR DS1 H5 H10 H15 H20 H25 H0 V5 V10 V15 V0 V25 V30 V35 V20 V40 1 4 1 8 16 76 100 5...

Page 36: ...IC12 NJM12902V X300 CR 800 IC307 HD64F2268TF X5 CR 803 IC10 NJM2711F IC15 TC7MET541AFK IC13 TC7S04F IC14 S 80928CNMC X1 CR 798 12 288MHz DSP UNIT IC F70DT DS only IC308 HN58X24128FPI IC300 LC73872M DA...

Page 37: ...5 0 018 15k R210 C206 0 018 R207 27k C202 680p 0 001 C240 100k R227 0 001 C215 MA2S111 D205 UMG2N Q201 10k R201 10k R202 10k R262 0 001 C214 MA2S111 D204 1k R216 0 001 C213 R205 10k 1k R204 MA2S111 D2...

Page 38: ...4 7 C321 100k R315 C319 470p R314 470k 0 039 C337 22k R329 22k R322 22k R320 C330 0 01 0 1 C326 NJM12902V IC2 R332 22k C341 0 001 R390 18k C356 0 1 C355 0 1 R354 27k R353 27k C346 0 1 4 7 R401 0 1 C3...

Page 39: ...116 18p C121 10p C114 50n L20 4 7 L21 150 R122 0 001 C122 0 001 C119 0 001 C108 0 5p C110 2 7k R65 18p C106 68p C102 56p C103 7 5n L19 10 5n L18 ERJ2GE JPW R139 4 5 6 3 2 1 SPM5001 IC4 100 R137 100 R1...

Page 40: ...C20 47p 100 R4 R5 100 C19 0 1 C17 10 NJM2904V IC4 270p C30 C23 82p 20k R33 470p C24 20k R16 C26 0 1 R21 4 7k R20 10k R10 20k C44 47p C31 47p C51 47p C50 47p C49 47p C46 47p C45 47p C42 47p C41 47p C4...

Page 41: ...a Inc Glenwood 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 Icom Canada A B N 88 006 092 575 290 2...

Page 42: ...S 14124HZ C1 2005 Icom Inc...

Search results

Summary of Contents for IC-F70DT

Reviews:

Related manuals for IC-F70DT

Brands by name

Popular brands

Icom IC-F70DT, Service Manual

Search results

Summary of Contents for IC-F70DT

Reviews:

Related manuals for IC-F70DT

Brands by name

Popular brands