Icom IC-718 Service Manual Download Page 43

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AFGL

GND

RFGL

GND

RITL

GND

SFTL

GND

5VL

GND

to LOGIC unit J3

SHIFT

RIT

RF/SQL

ESPO

AFO

AFE

GND

ESPO

AFO

AFE

to
LOGIC
unit J5

GND

9 - 3

9-3 LOGIC BOARD

• TOP VIEW

9-4 PHONE BOARD

• TOP VIEW

9-5 MIC BOARD

• TOP VIEW

9-6 VR BOARD

• TOP VIEW

The combination of this page and the next page shows
the unit layout in the same configuration as the actual
P.C. Board.

Summary of Contents for IC-718

Page 1: ...HF TRANCEIVER iC 718 iC 718 ...

Page 2: ...tlet or to a DC power supply that uses more than 16 V This will ruin the transceiver DO NOT expose the transceiver to rain snow or any liq uids DO NOT reverse the polarrities of the power supply when connecting the tranceiver DO NOT apply an RF signal of more than 20 dBm 100 mW to the antenna connector This could damage the transceiver s front end ORDERING PARTS Be sure to include the following fo...

Page 3: ...PREPARATION BEFORE SEVICING 5 1 5 2 PLL ADJUSTMENTS 5 2 5 3 TRANSMITTER ADJUSTMENTS 5 4 5 4 RECEIVER ADJUSTMENTS 5 8 5 5 SET MODE ADJUSTMENT 5 6 SECTION 6 PARTS LIST SECTION 7 MECHANICAL PARTS AND DISASSEMBLY SECTION 8 SEMI CONDUCTOR INFORMATIONS SECTION 9 BOARD LAYOUTS 9 1 MAIN UNIT 9 1 9 2 PLL UNIT 9 2 9 3 LOGIC UNIT 9 3 9 4 PHONE BOARD 9 3 9 5 MIC BOARD 9 3 9 6 VR BOARD 9 3 9 7 FILTER UNIT 9 5 ...

Page 4: ...ector 2 conductor 3 5 d mm 1 8 TRANSMITTER Modulation system SSB Balanced modulation AM Low level modulation Output power SSB CW RTTY FM 2 100 W AM 2 40 W Spurious emission Less than 50 dB below peak out put power spurious frequency below 30 MHz 50 dB above 30 MHz 60 dB Carrier suppression More than 40 dB Unwanted sideband suppression More than 50 dB Mic connector 8 pin connector 600 Ω KEY connect...

Page 5: ...C1 TA7805 BFO DDS IC2 SC 1287 Rx 1st IF amplifier Q1201 3SK131 2nd mixer circuit D401 HSB88WSTR Rx 455 kHz Tx 64 455 kHz Predrive amplifier Q1 2SC1971 Tx Rx switching relay RL13 AG201344 Drive amplifier Q2 Q3 2SC3133 Power amplifier Q4 Q5 2SC2904 Tx 1st IF amplifier Q151 2SK882 MIC amplifier IC2201 µPC5023 Tx 455 kHz Modulator IC2301 MC1495 USB LSB CW RTTY filter FI611 FL 65 Rx 2nd IF amplifier Q1...

Page 6: ...from the top and bottom covers Removing the Front unit Remove 4 screws from the front panel How to connect the coaxial cable Connect the coaxial cable as shown in below J6 J3 to MAIN unit PA unit FILTER unit J1 J701 MAIN unit PLL unit J3 from FILTER unit J6 from PA unit J701 J1 ...

Page 7: ...encies The filtered signals are then applied to the pre amplifier circuit 3 2 0 30 0 MHz The signals pass through a high pass filter L811 L814 C811 C817 to suppress excessively strong signals below 2 0 MHz such as from broadcasting stations The filtered signals are applied to a low pass filter and one of 5 band pass filters depending on their frequencies and are then applied to the pre amplifier c...

Page 8: ...ied to the noise AGC circuit Q1504 Q1505 R1514 R1519 C1512 to control the bias voltage of the noise amplifier Q1501 Q1502 The threshold level of the noise blanker switch Q1508 is set at 0 9 V When the detected voltage exceeds the thresh old level Q1509 outputs a blanking signal to close the noise blanker gate D1301 D1302 depending on the pulse noise period When the operating frequency is changed t...

Page 9: ... are connected in parallel to obtain a appropriate AGC characteristics middle or slow AGC release time respectively 4 1 14 S METER CIRCUIT MAIN UNIT The S meter circuit indicates the relative received signal strength while receiving by utilizing the AGC voltage which changes depending on the received signal strength The AGC bias voltage time constant line is applied to a dif ferential amplifier IC...

Page 10: ...passes FI611 and is amplified at Q502 and is then applied to D401 The 64 455 MHz IF signal is filtered at FI301 amplified at the IF amplifier Q151 and is then converted to the dis played frequency at the balanced mixer Q101 Q102 with the 1st LO signal The gates of the IF amplifiers Q151 Q502 are controlled by ALC bias voltage from the ALC circuit A thermistor R508 connected to the gate of Q502 imp...

Page 11: ...erature of Q4 If the Q4 temperature is more than 50 C 122 F R30 becomes very low impedance Then TEMP signal from PA unit is applied to the A D converter section of the CPU IC1 pin 92 in the LOGIC unit as PATL signal And the CPU out puts control signal to rotate the cooling fan at high speed via the I O expander IC3301 even when the transceiver con dition has changed from transmit to receive 4 2 10...

Page 12: ...ion is stored in the EEPROM IC2 The Icom CI V network system allows the IC 718 to be remotely controlled by a personal computer using an RS 232C I O port 4 5 REGULATOR CIRCUITS Either 8 V 5 V or 5 V DC is supplied from a corre sponding regulator circuit 8 V 5 V and 5 V DC are reg ulated at the following circuits using 13 8 V DC 1 5 V REGULATOR FRONT UNIT 5 V DC is provided by a three terminal volt...

Page 13: ...30 MHz Measuring range 0 100 Frequency range 1 kHz 10 Measuring range 1 100 Frequency range DC 20 MHz Measuring range 0 01 10 V Imput impedance 10 MΩ DC or beter Frequency range At least 90 MHz Spectraum bandwidth 100 kHz or more Frequency range 0 1 100 MHz Output level 0 1 µV 32 mV 127 to 17 dBm Measuring range 10 mV 10 V Input impedance 50 kΩ V DC or better Measurement capability 1 A and 30 A Fr...

Page 14: ...quency 14 10000 MHz Mode USB Receiving Mode AM Receiving PLL PLL PLL PLL PLL Connect a frequency counter to check point P1 Connect an RF volt meter to check point P1 Connect a digital multimeter or oscillo scope to check point CP1 Connect an RF volt meter to check point P4 Connect an RF volt meter to check point P1 Connect an RF volt meter to check point P5 Connect a frequency counter to check poi...

Page 15: ...1 2 1 2 P3 C7 C6 Reference OSC level adjustment P1 Reference frequency check point C16 Reference frequency pre setting P4 1st LO output level check point P5 BFO check point C165 VCO lock voltage adjustment L4 Reference freauency adjustment PLL unit ...

Page 16: ...nnect an audio generator to MIC connector and set as Frequency 1 5 kHz Level 30 mVrms Transmitting Display frequency 3 55000 MHz Mode USB Connect CP4002 MAIN unit to GND RF power Maximum H Mic gain Center 50 Connect an audio generator to MIC connector and set as Frequency 1 5 kHz Level 30 mVrms Transmitting PA Rear panel FILTER Rear panel Rear panel Rear panel Connect an ammeter 3 A between power ...

Page 17: ... Tx total gain adjustment L106 R503 L501 L303 L302 L301 R1720 Ic APC adjustment R2701 Tx total gain pre setting R21 Idling current adjustment Driver R24 Idling current adjustment Final J5 SWR detector check point J4 SWR detector pre setting C17 SWR detector adjustment PA unit FILTER unit MAIN unit ...

Page 18: ...um H Mic gain Center 50 R2385 MAIN unit Center Connect an audio generator to MIC connector and set as Frequency 1 kHz Level 30 mVrms Transmitting Set an AG as Frequency 1 kHz Level 3 mVrms Transmitting Display frequency 14 10000 MHz Mode CW RF power Maximum H Connect a keyer to the KEY jack Key down transmitting Rear panel Rear panel Rear panel MAIN Connect a spectrum analyzer to the ANT connector...

Page 19: ...er check point R3703 CW carrier adjustment R1730 AM carrier adjustment R2321 AM modulation adjustment or AM carrier pre setting R2385 AM carrier and AM modulation pre setting R2303 Carrier suppression adjustment MAIN unit ...

Page 20: ...SSG to ANT connec tor and set as Frequency 14 10150 MHz Level 1 0 µV 107 dBm Modulation OFF Receiving P AMP OFF ATT OFF Set an SSG as Level 1 0 mV 47 dBm and OFF Receiving Display frequency 14 10000 MHz Mode USB P AMP ON NB OFF Connect an SSG to ANT connec tor and set as Frequency 14 10150 MHz Level 3 2 µV 97 dBm Modulation OFF and apply following signal to ANT connector Receiving NB ON Receiving ...

Page 21: ...5 9 L1621 L1614 Rx total gain adjustment L1103 L1202 L1201 R2701 Rx total gain pre setting L1501 CP1501 Noise blanker check point L1502 Noise blanker adjustment MAIN unit ...

Page 22: ...er meter to ANT con nector Connect an audio generator to MIC jack and set as Frequency 1 5 kHz Level 30 mVrms 1 1 2 1 2 3 1 1 1 2 3 1 Push SET key to enter the RX set ting Or push UP key to skip the set mode adjustment for RX Push and hold SET key to set the volume center positions Verify the display shows GooD then push UP key to enter the S METER adjustment Push SET key to set the S0 level Push ...

Page 23: ...d or power meter to ANT connector Connect a 100 Ω dummy load or power meter to ANT connector 1 2 Transmit using an external PTT switch to set SWR reference level after pushing SET Transmit using an external PTT switch to set SWR2 level after push ing SET The display returns to the same as the set mode adjustment for TX ...

Page 24: ...ACC 322513 T L100 6200003260 S COIL NL 322522T 101J L101 6200003950 S COIL HF50ACC 322513 T L102 6200003950 S COIL HF50ACC 322513 T L103 6200003950 S COIL HF50ACC 322513 T L104 6200003950 S COIL HF50ACC 322513 T R1 7030003800 S RESISTOR ERJ3GEYJ 105 V 1 MΩ R2 7030003600 S RESISTOR ERJ3GEYJ 223 V 22 kΩ R3 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R4 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R5 70...

Page 25: ...360 S RESISTOR ERJ3GEYJ 221 V 220 Ω R176 7030003360 S RESISTOR ERJ3GEYJ 221 V 220 Ω R177 7030003360 S RESISTOR ERJ3GEYJ 221 V 220 Ω R179 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R180 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R182 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R185 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R186 7030003360 S RESISTOR ERJ3GEYJ 221 V 220 Ω R188 7030003520 S RESISTOR E...

Page 26: ...R 2SC4673D TD Q501 1590002310 S TRANSISTOR DTC114EE TL Q502 1560000560 S FET 2SK882 GR TE85L Q503 1590002310 S TRANSISTOR DTC114EE TL Q511 1590002310 S TRANSISTOR DTC114EE TL Q701 1590002310 S TRANSISTOR DTC114EE TL Q1001 1510000510 S TRANSISTOR 2SA1576A T106R Q1002 1590002310 S TRANSISTOR DTC114EE TL Q1101 1560000640 S FET 2SK1740 TA Q1102 1560000640 S FET 2SK1740 TA Q1103 1560000640 S FET 2SK174...

Page 27: ... COIL NL 322522T 101J L153 6200003550 S COIL MLF1608A 4R7K T L201 6200001830 S COIL NL 322522T 100J L202 6200003000 S COIL NL 322522T R22J 3 L301 6150004280 COIL LS 484B C 14927 L302 6150004280 COIL LS 484B C 14927 L303 6150004280 COIL LS 484B C 14927 L401 6140003210 S COIL LR 358 L402 6140003530 COIL LR 395 L501 6150004090 COIL LS 469 C 13969 L701 6200003260 S COIL NL 322522T 101J L702 6200003260...

Page 28: ... V 1 kΩ R634 7030003320 S RESISTOR ERJ3GEYJ 101 V 100 Ω R635 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R701 7030009830 S RESISTOR ERJ12YJ391U 390 Ω R703 7030006250 S RESISTOR ERJ12YJ271U 270 Ω R704 7030009830 S RESISTOR ERJ12YJ391U 390 Ω R705 7030006260 S RESISTOR ERJ12YJ471U 470 Ω R801 7030003400 S RESISTOR ERJ3GEYJ 471 V 470 Ω R802 7030003400 S RESISTOR ERJ3GEYJ 471 V 470 Ω R821 7030003240 S RE...

Page 29: ...103 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R2104 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R2105 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R2106 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R2107 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R2108 7030003400 S RESISTOR ERJ3GEYJ 471 V 470 Ω R2201 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kΩ R2202 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R2203 70300...

Page 30: ...AMIC C1608 CH 1H 151J T A C104 4030007050 S CERAMIC C1608 CH 1H 220J T A C105 4030007120 S CERAMIC C1608 CH 1H 820J T A C106 4030008650 S CERAMIC C1608 JB 1H 332K T A C107 4030008470 S CERAMIC C1608 JB 1H 272K T A C108 4030011600 S CERAMIC C1608 JB 1C 104KT N C109 4030011600 S CERAMIC C1608 JB 1C 104KT N C110 4030011600 S CERAMIC C1608 JB 1C 104KT N C111 4030006980 S CERAMIC C1608 CH 1H 070D T A C...

Page 31: ...H 331J T A C1509 4030011600 S CERAMIC C1608 JB 1C 104KT N C1510 4030011600 S CERAMIC C1608 JB 1C 104KT N C1511 4030011340 S CERAMIC C1608 CH 1H 471J T A C1512 4510004440 S ELECTROLYTIC ECEV1HA010SR C1513 4510004640 S ELECTROLYTIC ECEV1CA470SP C1514 4030011600 S CERAMIC C1608 JB 1C 104KT N C1515 4030011600 S CERAMIC C1608 JB 1C 104KT N C1516 4030011600 S CERAMIC C1608 JB 1C 104KT N C1601 4030011600...

Page 32: ... CERAMIC C1608 JB 1H 472K T A C4104 4030006880 S CERAMIC C1608 JB 1H 472K T A C4105 4030006880 S CERAMIC C1608 JB 1H 472K T A C4106 4030006880 S CERAMIC C1608 JB 1H 472K T A C4107 4030006880 S CERAMIC C1608 JB 1H 472K T A C4200 4030006880 S CERAMIC C1608 JB 1H 472K T A C4201 4030007090 S CERAMIC C1608 CH 1H 470J T A C4202 4030007090 S CERAMIC C1608 CH 1H 470J T A C4203 4030007090 S CERAMIC C1608 C...

Page 33: ...R4 7030003400 S RESISTOR ERJ3GEYJ 471 V 470 Ω R5 7030003320 S RESISTOR ERJ3GEYJ 101 V 100 Ω R6 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R7 7030003360 S RESISTOR ERJ3GEYJ 221 V 220 Ω R8 7030003360 S RESISTOR ERJ3GEYJ 221 V 220 Ω R9 7030003600 S RESISTOR ERJ3GEYJ 223 V 22 kΩ R10 7030003600 S RESISTOR ERJ3GEYJ 223 V 22 kΩ R12 7030003580 S RESISTOR ERJ3GEYJ 153 V 15 kΩ R13 7030003400 S RESISTOR ERJ3...

Page 34: ...MIC C1608 JB 1H 472K T A C28 4030006880 S CERAMIC C1608 JB 1H 472K T A C29 4030006880 S CERAMIC C1608 JB 1H 472K T A C30 4030006880 S CERAMIC C1608 JB 1H 472K T A C31 4030006880 S CERAMIC C1608 JB 1H 472K T A C32 4030006880 S CERAMIC C1608 JB 1H 472K T A C33 4510006220 S ELECTROLYTIC ECEV1CA101UP C34 4030006880 S CERAMIC C1608 JB 1H 472K T A C50 4030007050 S CERAMIC C1608 CH 1H 220J T A C51 403000...

Page 35: ...006130 S RESISTOR ERJ1WYJ100U 10 Ω R23 7030010070 S RESISTOR ERJ12YJ681U 680 Ω R24 7310003240 TRIMMER EVN 2ACA00 B23 202 R25 7100000640 RESISTOR 5 SI 0 012 Ω J R26 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kΩ R27 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kΩ R28 7030004040 S RESISTOR ERJ3GEYJ 4R7 V 4 7 Ω R29 7030003420 S RESISTOR ERJ3GEYJ 681 V 680 Ω R30 7510000130 THERMISTOR ERT D2FHL 333S R31 703000347...

Page 36: ... 473 V 47 kΩ R9 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R20 7030003580 S RESISTOR ERJ3GEYJ 153 V 15 kΩ C1 4030008920 S CERAMIC C1608 JB 1C 473K T A C2 4030008920 S CERAMIC C1608 JB 1C 473K T A C3 4030008920 S CERAMIC C1608 JB 1C 473K T A C4 4030008920 S CERAMIC C1608 JB 1C 473K T A C5 4030008920 S CERAMIC C1608 JB 1C 473K T A C6 4030008920 S CERAMIC C1608 JB 1C 473K T A C7 4030008920 S CERAMIC ...

Page 37: ...Y AJS1311 RL8 6330001470 RELAY AJS1311 RL9 6330001470 RELAY AJS1311 RL10 6330001470 RELAY AJS1311 RL11 6330001470 RELAY AJS1311 RL12 6330001470 RELAY AJS1311 RL13 6330001330 RELAY AG 201344 J1 6510021980 CONNECTOR 10FMN BTRK J2 6510007020 CONNECTOR TMP J01X V6 J3 6510007020 CONNECTOR TMP J01X V6 J4 6910001040 CONNECTOR IPS 1136 J5 6910001040 CONNECTOR IPS 1136 W3 6910001030 JUMPER IPS 1041 4 W4 69...

Page 38: ...0310 B312D insulation washer 1 EP3 6910000340 P101 KD insulation sheet 1 MP1 8110007050 Bottom cover 2241 L cover 1 MP2 8110007060 Top cover 2241 U cover 1 MP3 8010018020 2241 chassis 1 MP4 8930037001 1691 grounding plate 1 1 MP6 8930002900 Rubber foot A SK1912A 2 MP7 8010001520 Stand C 1 MP8 8930005790 Color foot A for stand 1 MP9 8930005800 Color foot B for stand 1 MP10 8930018520 TR clip A 1 MP...

Page 39: ...C SP1 F MP25 F MP1 F MP12 F MP11 F MP9 F MP10 F MP18 F MP15 F MP21 F PHONE BOARD VR BOARD EP1 F MIC BOARD LOGIC UNIT MP7 C MP18 C MP9 C MP22 C Unit abbreviations F FRONT UNIT M MAIN UNIT L LOGIC UNIT C CHASSIS PARTS FILTER UNIT PA UNIT MAIN UNIT PLL UNIT MP14 C MP20 C MP20 C MP20 C MP15 C EP1 C J1 C MP15 C MP29 C MP3 C MP23 C MP13 C MP4 C EP2 C MP20 C MP14 C EP3 C MP19 C MP25 C MP24 C MP1 M MP11 C...

Page 40: ... E C 2SK882 GR TG S D G 2SK2171 4 KM G S G D 3SK131 T2 MAS V11 S D G1 G2 DTC114EE TL 24 DTC114EUA 24 UN9211 TX 8A B E C DTA114EE TL 14 DTA114EUA T106 16 B E C XP4601 TX 5C XP4311 TX 7X E B C C E B E1 E2 B1 C1 C2 B2 8 1 8 2 DIODES NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW 1SS184 B3 DAN202K N A1 C A2 1SS226 C3 1SS375 TL FH DA221 TL K A C 1SS355 A MA2S111 A MA2S728 B A C A C 1SV312 BB A1 C1 A2 ...

Page 41: ...PAT8 HV KEY GND PWS 14V 14V ICL ICH STRT TEMP J4101 J2601 J2602 1 1 1 2 8 8 8 2 15 16 GND GND DOE DOUT DOE DOUT 14V 14V 14V PAT8 HV KEY GND PWS 14V 14V ICL ICH STRT TEMP 16 1 1 1 1 15 2 1 J2603 J4502 CIV CIVE SP1 GND SPE SPE ESPO SPO SPO SPO SPE GND 5V MDAT DINT GND DSPS MCK DSST DRES 1 2 9 10 1 2 3 1 BLACK FAN MOTOR MF1 RED 3 FAN FAN to PA unit J3 Optional unit UT 102 Optional unit UT 106 J2501 S...

Page 42: ... J1 1 2 1 2 to MAIN unit J401 P2 P1 2LO 2LOE BFO J2 J3 1 2 to MAIN unit J2001 P5 BFO BFOE 1st LO J4 1 2 1 2 to MAIN unit J201 P4 P3 1LO 1LOE 9 2 MAIN UNIT BOTTM VIEW 9 2 PLL UNIT TOP VIEW The combination of this page and the previous page shows the unit layout in the same configuration as the actual P C Board ...

Page 43: ...IFT RIT RF SQL AF J1 10 2 9 1 ESPO AFO AFO AFE GND ESPO ESPO AFO AFE AFE to LOGIC unit J5 J2 GND GND 6 8 5 4 3 2 1 7 9 3 9 3 LOGIC BOARD TOP VIEW 9 4 PHONE BOARD TOP VIEW 9 5 MIC BOARD TOP VIEW 9 6 VR BOARD TOP VIEW The combination of this page and the next page shows the unit layout in the same configuration as the actual P C Board ...

Page 44: ...TXS SBSY KDS DSPS DSST SSTB DINT DRES ASTB MSTB FSTB BSTB MCK MDAT POWS GND GND 29 1 1 5 5 15 15 25 25 30 30 2 2 10 10 20 20 30 2 1 to MAIN unit J4401 J6 STRT 5V SNDS 8V 8V HV 14V 14V FSKK MICE MIC SEND SQLS SEND SEND SEND SPS PHOE PHOE PHO PHO GND GND GND GND CIVE CIV ALMS NC KEY 29 30 1 2 GND 8V 13V DNB DSTB PDAT CON1 FSKK 1 15 2 16 J9 NC 13V 13V PSTB PCK CON2 CON0 SRST to MAIN unit J4401 9 4 LO...

Page 45: ...1 F6 F4 F2 FOR F5 REF F3 T13V GND J4 J3 P5 P6 to MAIN unit J701 W11 W10 CHASSIS J2 P4 P3 W9 to PA unit J7 W8 CHASSIS 9 5 9 7 FILTER UNIT TOP VIEW The combination of this page and the next page shows the unit layout in the same configuration as the actual P C Board ...

Page 46: ...9 6 FILTER UNIT BOTTOM VIEW The combination of this page and the previous page shows the unit layout in the same configuration as the actual P C Board ...

Page 47: ...CH STAR TEMP 14V PAT8 HV KEY J12 BROWN ORANGE RED YELLOW KEY STAR 14V GND 1 2 3 4 1 2 3 4 5 6 J1 RED RED BLACK BLACK J6 P1 P2 W6 to MAIN unit J1 W7 J7 P4 P3 W8 to FILTER unit J2 W9 VARISTOR BOARD CHASSIS CHASSIS 9 7 9 8 PA UNIT TOP VIEW The combination of this page and the next page shows the unit layout in the same configuration as the actual P C Board ...

Page 48: ...VARISTOR BOARD 9 8 PA UNIT BOTTOM VIEW The combination of this page and the previous page shows the unit layout in the same configuration as the actual P C Board ...

Page 49: ...3301 M62352 FANV D2 D3 1SS375 2 D1 MA29B D2 D3 MA29B 2 Q6 2SD1585 15 0 22 0 M 22 0 30 0 M 2 0 4 0 M 4 0 8 0 M 8 0 15 0 M TX SW HV 13V A D MAIN DIAL RIT AF VOL SHIFT A D A D A D IC40 TC7W32 WAVE FORMER CI V I F RF SQL VOL IC100 7W04 CPU FRONT UNIT IC1 HD6473834H IC3006 BU4094 SERI PARA SERI PARA SERI PARA IC3001 BU4094 IC3004 BU4094 MODE DATA BPF LPF 5 REG 13V 5V IC1 TA7805 IC 3002 TD62783 IC3003 T...

Page 50: ... 7 8 9 10 J3 W3 1 2 3 4 5 6 7 8 9 10 J1 GND AFGL GND RFGL GND RITL GND SFTL GND 5VL VR BOARD MIC BOARD PHONE BOARD J1 1 2 3 4 5 6 7 8 9 10 J5 W4 W5 1 2 3 4 5 6 7 8 9 10 J4 1 2 3 4 5 6 7 8 9 10 J2 MIC MICE GND AFO SEND SQLS UD 8V W1 DSPS DSST SSTB DINT DRES ASTB MSTB FSTB BSTB MCK MDAT POWS GND GND GND GND AFO AFE AFE AFE GND DSPS DSST SSTB DINT DRES ASTB MSTB FSTB BSTB MCK MDAT POWS GND GND UT 106...

Page 51: ...202K D1632 MA77 C1632 0 1 C2010 0 1 L2001 100µH C2009 10 C2008 0 1 C2007 0 1 C2006 0 0047 C2004 0 1 C2003 0 1 C2002 100p R2001 100 C2001 0 1 C1905 0 0047 D1901 1SS375 R1907 1k C1904 0 1 C1903 0 0047 L1621 LS 450 R1631 10k R1632 10k R1633 100k R2002 22k C1623 0 1 C1624 0 1 R2003 100 IFOUT 1 VCC 2 OSCIN 3 BASE 4 BASE 5 BASE 6 GND 7 COLECT 8 IC2001 TA4101F C2005 1 SSBAF SSBAF 8V 5V ALC 14V 8V 8V 8V A...

Page 52: ...202K D1632 MA77 C1632 0 1 C2010 0 1 L2001 100µH C2009 10 C2008 0 1 C2007 0 1 C2006 0 0047 C2004 0 1 C2003 0 1 C2002 100p R2001 100 C2001 0 1 C1905 0 0047 D1901 1SS375 R1907 1k C1904 0 1 C1903 0 0047 L1621 LS 450 R1631 10k R1632 10k R1633 100k R2002 22k C1623 0 1 C1624 0 1 R2003 100 IFOUT 1 VCC 2 OSCIN 3 BASE 4 BASE 5 BASE 6 GND 7 COLECT 8 IC2001 TA4101F C2005 1 SSBAF SSBAF 8V 5V ALC 14V 8V 8V 8V A...

Page 53: ...Fax 561 36 03 00 URL http www icom france com Crta de Gracia a Manresa Km 14 750 08190 Sant Cugat del Valles Barcelona SPAIN Phone 93 590 26 70 Fax 93 589 04 46 URL http www icomspain com Corporate Headquarters 2380 116th Avenue N E Bellevue WA 98004 U S A Phone 425 454 8155 Fax 425 454 1509 URL http www icomamerica com Customer Service Phone 425 454 7619 Glenwood Centre 150 6165 Highway 17 Delta ...

Page 54: ...Count on us iC 718 ...

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