Icom IC-F70DS, Service Manual

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 and smoothly 4 DO NOT short any circuits or electronic parts An insulated tuning tool MUST be used for all adjustments 5 DO NOT keep power ON for a long time when the transceiver is defective 6 DO NOT...

Page 3: ...6 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 INFORMATION SECTION 9 BOARD LAYOUTS 9 1 FRONT UNIT 9 1 9 2 MAIN UNIT 9 3 9 3 FUSE BOARD 9 3 9 4 ANT BOARD 9 3 9 5 DSP UNIT IC F70DT DS only 9 5 9 6 VR BOARD 9 5 SECTION 10 BLOCK DIAGRAM SECTION 11 VOLTAGE DIAG...

Page 4: ... 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 frequency response 2 dB to 8 dB of 6 dB octave from 300 Hz to 2550 Hz Narrow 2 dB to 8 dB of 6 dB octave from 300 Hz to 3000 Hz Wide Microphone impedance 2 2 kΩ M RECEIVER Receive system Double conversion ...

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 IC310 M62334FP VCO circuit AF volume IC303 M62364FP DSP unit IC F70DT DS only TOP VIEW BOTTOM VIEW CPU5V regulator IC311 TK11250CM YGR amplifier Q11 2SC5110 O PLL IC IC1 LMX2352TM IF IC IC3 TA31136FN Au...

Page 6: ...ints 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 3 Unscrew 5 screws N and remove the FRONT unit from the front panel 3 1 5 Disconnect the cable G from J1 and remove the CHASSIS unit from the front panel C E E E A B D F O ring Be careful not to lost...

Page 7: ...F 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 The 1st IF signal from the 1st mixer is passed through the crystal filter FI3 to suppress unwanted signals and then amplified at the 1st IF amplifier Q17 The amplified 1st IF signal is applied to th...

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 ON and OFF A portion of the demodulated AF signals from the FM IF IC IC3 pin 9 are applied to the converter IC303 pin 1 to be adjusted its level The level controlled signals are output from pin 2 and ...

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 form changed CTCSS DTCS signals are then passed through the LPF IC12 pins 8 10 and applied to the converter IC303 pin 9 to be adjusted its level and output from pin 10 The level adjusted CTCSS DTCS sign...

Page 10: ...1st 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 D26 RX VCO 154 174 MHz TX VCO Q5 D6 D7 D25 6 10 14 15 16 PLL control signals from CPU IC307 15 3 MHz reference signal from reference frequency osciilator X3 IC1 LMX2352TM PLL CIRCUIT Shift register Pr...

Page 11: ...IC7 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 passed through the microphone switch MAIN UNIT IC302 pins 3 4 FM filter R328 C335 FM PM switch IC302 pins 2 15 4 6 PORT ALLOCATIONS 4 6 1 CPU IC307 Pin number Port name Description 4 7 R1 R2 R4 R8 In...

Page 12: ...serial 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 number Port name Description 89 91 CENC0 CENC2 Output the CTCSS DTCS signals 92 SIDE3 Input port for MONITOR switch MAIN UNIT S4 Low While MONITOR switchispushed 93 MTDT Outputs the MSK data to the base b...

Page 13: ...allShield 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 screen BEFORE STARTING SOFTWARE ADJUSTMENT Clone the adjustment frequencies into the transceiver and set the configuration using with the CS F70 F1700 CLONING SOFTWARE before starting the softwar...

Page 14: ...TER 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 A JUMPER WIRE HERE LECTROLYTIC CAPACITOR 0 LONING CABLE UDIO GENERATOR Z TO K Z MILLIVOLTMETER 044 044 30n 30 n JIG cable ...

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 manual 8 PLL lock voltage adjust for TX manual 9 PLL lock voltage preset for RX automatic 0 PLL lock voltage preset for TX automatic 1 S meter 2 S meter digital 3 Deviation narrow 4 Deviation wide 5 D...

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 1 3 4 3 6 V Verify 3 Operating CH Transmitting CH 2 3 4 3 6 V Verify REFERENCE FREQUENCY REF Operating CH CH 2 Top panel Loosely couple a frequency counter to the antenna connec tor 174 000000 MHz 10...

Page 17: ...ector 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 DEVIATION NARROW MOD N C 1 Operating CH CH 13 Top panel Connect an FM deviation meter to the antenna connector through an attenuator 2 00 to 2 10 kHz Connect an audio generator to the JIG cable and set as ...

Page 18: ...l 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 CH Transmitting CH 11 CTCSS DTCS DEVIATION CTCSS DTCS 1 Operating CH CH 12 Top panel Connect an FM deviation meter to the antenna connector through an attenuator 0 68 to 0 72 kHz No audio applied to...

Page 19: ...s 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 the Digial RSSI level Connect the SSG to the antenna connec tor and set as Frequency Level Modulation Receiving 155 000 MHz 20 dBµ 127 dBm No modulation S METER RSSI 1 Operating CH CH 5 Push the ENTER...

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 DIO DAP202U T106 B 32 4 5 4 D303 1160000050 S DIO DAP202U T106 T 39 7 27 D304 1160000050 S DIO DAP202U T106 T 36 5 27 3 D306 1730002320 S ZEN MA8051 M TX B 11 1 5 2 D307 1790001260 S DIO MA2S077 TX B ...

Page 21: ...8 R92 7030010130 S RES ERJ2GE 6R8 X 6 8 Ω B 23 6 75 5 R93 7030009270 S RES ERJ2GEJ 821 X 820 Ω B 23 1 74 2 R94 7030009270 S RES ERJ2GEJ 821 X 820 Ω B 24 1 74 2 R95 7030004970 S RES ERJ2GEJ 470 X 47 Ω B 27 6 75 8 R96 7030004980 S RES ERJ2GEJ 101 X 100 Ω B 34 9 76 2 R97 7030009270 S RES ERJ2GEJ 821 X 820 Ω B 31 2 89 9 R98 7030010130 S RES ERJ2GE 6R8 X 6 8 Ω B 30 2 91 3 R99 7030009270 S RES ERJ2GEJ 8...

Page 22: ...04 X 100 kΩ T 36 5 3 3 R438 7030005090 S RES ERJ2GEJ 104 X 100 kΩ T 36 9 2 R439 7030005700 S RES ERJ2GEJ 274 X 270 kΩ B 15 7 120 9 R440 7030010080 S RES ERJ2RHD 104 X 100 kΩ B 14 3 121 8 R441 7030004980 S RES ERJ2GEJ 101 X 100 Ω T 10 8 5 4 R442 7030005090 S RES ERJ2GEJ 104 X 100 kΩ B 6 9 7 9 R443 7030005090 S RES ERJ2GEJ 104 X 100 kΩ B 4 2 10 8 R444 7030005090 S RES ERJ2GEJ 104 X 100 kΩ B 18 1 3 7...

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 C1608 JB 1A 105K T B 35 2 96 2 C176 4030017420 S CER ECJ0EC1H470J B 39 91 8 C177 4030017460 S CER ECJ0EB1E102K T 39 3 86 C178 4030017460 S CER ECJ0EB1E102K B 35 3 97 9 C179 4030017460 S CER ECJ0EB1E...

Page 24: ...9 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 CER ECJ0EC1H470J B 32 1 17 7 C415 4030017420 S CER ECJ0EC1H470J B 14 9 3 2 C416 4030017420 S CER ECJ0EC1H470J B 19 3 3 9 C418 4030016930 S CER ECJ0EB1A104K T 23 1 11 5 C419 4030017460 S CER ECJ0EB1E1...

Page 25: ...7030005120 S RES ERJ2GEJ 102 X 1 kΩ B 27 2 42 1 R216 7030005120 S RES ERJ2GEJ 102 X 1 kΩ B 13 6 49 2 R217 7030007340 S RES ERJ2GEJ 153 X 15 kΩ B 10 2 64 5 R219 7030003860 S RES ERJ3GE JPW V B 7 3 64 3 R221 7030005090 S RES ERJ2GEJ 104 X 100 kΩ B 6 4 63 2 R222 7030008300 S RES ERJ2GEJ 184 X 180 kΩ B 35 4 51 2 R223 7030005600 S RES ERJ2GEJ 273 X 27 kΩ B 3 69 9 R224 7030007290 S RES ERJ2GEJ 222 X 2 2...

Page 26: ...0011880 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 TC7MET541AFK EC T 7 16 4 IC17 1130010390 S IC HN58X2416TI B 8 9 38 5 Q1 1530002060 S TR 2SC4081 T106 R B 23 4 22 FI1 2020001780 S CER CFWCA450KEFA R0 B 20 7 12 1 X1 6050012080 S XTL CR 798 12 288 MHz T 23 4 36 3 L1 6200003590 S COL EXCCL3225...

Page 27: ...CJ0EC1H470J T 4 9 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 S CER ECJ0EC1H470J B 3 11 3 C39 4030017760 S CER ECJ0EB1H222K B 19 6 20 4 C40 4030017420 S CER ECJ0EC1H470J B 7 8 9 9 C41 4030017420 S CER ECJ0EC1H470J T 12 9 9 3 C42 4030017420 S CE...

Page 28: ...e 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 SSBC 2 MP49 8810010120 Screw PH B0 M2 8 SUS ZK 4 MP50 8820001320 2795 screw 2 MP51 8810009510 Screw PH BT M2 4 NI ZU 10 MP52 8810008970 Screw FH BT M2 3 5 NI ZU 2 MP53 8810010430 Screw truss M3 5 SUS ...

Page 29: ...6 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 F FUSE BOARD MP4 M W1 C MP1 D MP51 C MP51 C MP51 C MP51 C MP51 C MP5 M MP3 M MP51 C MAIN UNIT DSP UNIT IC F70DT DS only Glue Once J1 C and J2 C are removed from the chassis the glue must be applied t...

Page 30: ...N03 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 Symbol 26_ Symbol K2 Symbol RD07MVS1 Symbol QY Symbol S3C Symbol G2 Symbol 9H Symbol 5N C A1 A2 A C A C A C C A1 A2 A C A C A C A C2 C1 A C2 C1 A C A C A C A C 1SS301 1SV239 1SV284 1SV307 DAN235E TL D...

Page 31: ...H5 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 DS2 MP5 9 1 FRONT UNIT TOP VIEW ...

Page 32: ...Y 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 MAIN unit J3 J1 EXPTT 5V 5V R1 R2 R4 R8 RESB XRXD XTXD RES GND FSCL FSDA AFON SPCON NC PTTSW PTTI EM KR PWRSW VOXOUT AFVI OPTV VCC VCC SP MIC GND MP2 MP2 MP5 9 2 BOTTOM VIEW FRONT UNIT ...

Page 33: ...NC 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 OPV1 30 1 to FRONT unit J1 J3 GND MIC SP VCC VCC OPTV AFVI VOXOUT PWRSW KR EM PTTI PTTSW NC SPCON AFON FSDA FSCL GND RESET XTXD XRXD RESB R8 R4 R2 R1 5V 5V EXPTT MP2 MP3 MP5 MP6 9 3 9 2 MAIN UNIT TOP VI...

Page 34: ...5 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 VIEW ANT BOARD BOTTOM VIEW FUSE BOARD H5 H10 H15 H0 V5 V0 H5 H10 H0 V5 V10 V15 V0 MP1 ...

Page 35: ...A 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 50 26 25 1 51 75 9 8 5 20 11 1 10 to MAIN unit J2 J1 SCK 16 30 SI SO CIRQ CCS FLASH_RXD AFOUT FLASH_TXD RMUT 3 3V AFON MMUT VCC 5V GND 15 1 RXD TXD RTS AGND DFIL MD2 CPU_VDD CTS TEMP BUSY RSSI MIC QOU...

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 DAST SCK SC IC303 M62364FP 4KEY 10KEY FSCL FSDA KS0 KS3 KR0 KR3 X301 CR 799 DISC AFOUT RXAFIN MIC SW FM DASW SO SIO CCSI OUT CSK0 PTTO PTTIN BUSY FM PM PM CP3 EXPOUT DMI DMO DAFO IC302 BU4053BCFV AUDIO...

Page 37: ...05 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 D201 R241 100k R240 470k R239 470k 10k R242 C246 33 C245 33 0 001 C222 0 01 C247 180k R222 C248 0 001 100k R213 MA2S111 D203 68k R214 0 1 C211 0 001 C210 C209 0 001 C208 0 001 47p C237 10 R236 0 047 C2...

Page 38: ...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 C349 680 R342 0 1 C351 0 1 C353 R352 33k 3 9k R351 0 1 C387 M62364FP IC303 VIN4 VOUT4 VOUT3 VIN3 DI CLK LD VDD VIN2 VOUT2 VOUT1 VIN1 VIN5 VOUT5 VOUT6 VIN6 D0 VDAREF RESET GND VIN7 VOUT7 VOUT8 VIN8 12 11 10...

Page 39: ...16 18p C121 10p C114 50n L20 4 7µ 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 R138 6p C170 18p C77 C1608CB 15NG L35 C1608CB 15NG L34 12p C167 6p C165 R97 820 R99 820 0 001 C161 6 8 R98 617DB 1714 L31 S2 S1 G2 D2 D1 G1 617DB 1714 L30 0 01 C156 0 01 C158 0 001 C78 10k R43 1k R44 MA...

Page 40: ...M 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 C40 47p C38 47p C36 47p C35 47p L1 EXCCL3225U R8 100 R15 1k R96 1k R3 22k R97 1k R26 1k R12 1k R27 1k R32 1k R25 1k R28 1k R23 1k R31 1k R22 1k R30 1k R24 1k R29 1k 1µ L6 L2 1µ C88 470p C89 1 0 0022 C3...

Page 41: ...ca 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 88 006 092 575 290 294 Albert Street Brunswick Victoria 3056 Australia Phone 61 03 9387 0666 Fax 61 03 9387 0022 URL http www icom net au E mail sales icom net au Icom Australia Pty Ltd 146A Harris Road East Tamaki Auck...

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