Icom IC-M32 Service Manual Download Page 24 | Manualshive

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SECTION 9

BOARD LAYOUTS

MAIN UNIT

• TOP VIEW

DS246

16

SCN

H/L

SQL

CH/WX

+

–

VOL

VOL

LOCK

MONI

U/I/C

DUAL

TAG

TAG

9

SP1

CLONE

SPO

AFOUT

MIC

GND

+ –

Mic

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

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Summary of Contents for IC-M32

Page 1: ...VHF MARINE TRANSCEIVER iC m32 ...

Page 2: ...ssis 5 pieces Addresses are provided on the inside back cover for your con venience 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 ...

Page 3: ... 4 3 4 4 POWER SUPPLY CIRCUITS 4 3 4 5 CPU PORT ALLOCATIONS 4 4 SECTION 5 ADJUSTMENT PROCEDURES 5 1 PREPARATION 5 1 5 2 PLL AND TRANSMITTER ADJUSTMENTS 5 4 5 3 RECEIVER ADJUSTMENT 5 5 SECTION 6 PARTS LIST SECTION 7 MECHANICAL PARTS AND DISASSEMBLY CHASIS PARTS 7 1 CHARGER PARTS BC 150 7 3 SECTION 8 SEMI CONDUCTOR INFORMATION SECTION 9 BOARD LAYOUTS SECTION 10 BLOCK DIAGRAM SECTION 11 VOLTAGE DIAGR...

Page 4: ...ation 5 0 kHz Spurious emissions 68 dB Adjacent channel power 70 dB Transmitter audio distortion Less than 10 at 1 kHz 60 deviation Residual modulation 40 dB Audio frequency response 1 dB to 3 dB of 6 dB octave from 300 Hz to 3000 Hz RECEIVER Receive system Double conversion superheterodyne system Intermediate frequencies 1st 21 7 MHz 2nd 450 kHz Sensitivity 0 25 µV at 12 dB SINAD Squelch sensitiv...

Page 5: ...7 400 156 025 156 075 156 075 156 125 156 125 156 175 156 175 156 225 156 225 156 275 156 275 156 325 156 325 156 375 156 425 156 475 Rx only 156 575 156 625 Receive 157 050 161 700 157 100 161 750 157 150 161 800 161 850 161 900 161 950 162 000 160 625 160 675 156 075 160 725 156 125 160 775 156 175 160 825 156 225 160 875 156 275 160 925 156 325 156 375 156 425 156 475 156 525 156 575 156 625 US...

Page 6: ... IF detector IC IC170 TA31136FN PLL IC IC1 µPD3140GS D A converter IC190 M62363FP 650C CPU IC360 M37560M8A 700GP EEPROM IC340 BR24L16FV Mic amplifier and low pass filter circuits IC200 NJM2902V Antenna switching circuit D52 MA77 Power amplifier Q54 RD07MVS1 APC IC50 NJM2125F IF amplifier Q151 2SC2714 Y TX RX switch D50 D51 MA77 ...

Page 7: ... and rubber from the front panel q Unscrew 1 nut D w Unscrew 2 screws E 2 6 mm e Take off the chassis unit in the direction of the arrow r Unplug F to separate the front panel J251 and the chassis unit t Remove 1 washer G NOTE A For IC M2A only B For IC M32 only Removing the MAIN unit q Unscrew 7 screws H 2 4 mm w Unsolder 3 points I and remove earth plate e Separate the MAIN unit and the chassis ...

Page 8: ... mixed with a 2nd LO signal for conversion into a 450 kHz 2nd IF signal IC170 contains the 2nd mixer limiter amplifier quadrature detector and active filter circuits A 21 25 MHz 2nd LO signal is produced at the PLL circuit using the reference frequency The 2nd IF signal from the 2nd mixer IC170 pin 3 passes through ceramic filters FI170 to remove unwanted hetero dyne frequencies It is then amplifi...

Page 9: ...l at the VCO circuit Q21 Q22 D22 D23 The oscillated signal is amplified at the buffer amplifiers Q23 Q24 4 2 3 DRIVE POWER AMPLIFIER CIRCUITS MAIN UNIT The signal from the VCO circuit passes through the trans mit receive switching circuit D50 D51 and is applied to the buffer amplifier Q50 The amplified signal is amplified by the pre driver Q53 and the power amplifier Q54 to obtain 5 W of RF power ...

Page 10: ...plied to the receive 1st mixer Q150 or transmit driver via the TX RX switching diode D50 D51 Shift register Prescaler Phase detector Loop filter Programmable counter Programmable divider X1 21 25 MHz 2nd LO signal 21 25 MHz to the FM IF IC IC170 Q21 Q22 D22 D23 VCO Buffer Buffer Buffer Q24 D50 D51 Q25 Q23 3 4 5 PLST IC1 PLL IC SCK SDATA to transmitter circuit to the 1st mixer circuit 17 16 13 19 P...

Page 11: ... detection Input port for the SCN key Low While the SCN key is pushed Input port for the H L key Low While the H L key is pushed Input port for the volume control sig nal Input port for the SQL key Low While the SQL key is pushed Pin number 43 44 45 46 47 48 49 50 51 52 53 54 55 Port name CH WX UP DOWN 16 AFMS BPFS V5VS T5VS R5VS AFVS MICM DETM VOL UP Description Input port for the CH WX key Low W...

Page 12: ...key and PTT switch and then turn power ON EQUIPMENT DC power supply RF power meter terminated type Frequency counter Digital multimeter GRADE AND RANGE Output voltage 7 5 V DC Current capacity 3 A or more Measuring range 0 1 10 W Frequency range 100 300 MHz Impedance 50 Ω SWR Less than 1 2 1 Frequency range 0 1 300 MHz Frequency accuracy 1 ppm or better Sensitivity 100 mV or better Input impedance...

Page 13: ...ck SINAD meter Speaker 8 OPC 782 Optional plug adapter cable NOTE If the tape on the back of the TOP PANEL has lost its adhesion replacement to a new one is necessary DETACHING ATTACHING THE TOP PANEL Detach the TOP PANEL with a sharp point such as tweezers for adjustment BE CAREFUL cracking the TOP PANEL After adjustment be sure to reattach the TOP PANEL to maintain the water resistance capabilit...

Page 14: ...erating frq 156 800 MHz Set an SSG as Frequency 156 800 MHz Level 3 2 µV 97 dBm Modulation 1 kHz Deviation 3 5 kHz Receiving MAIN Top Panel Connect a digital multi meter or oscil loscope to the check point CP1 Connect an SSG to the antenna con nector and a SINAD meter with 8 Ω load to the SP jack 1 8 V 1 7 V 0 35 µV 116 dBm Verify Verify CP1 PLL lock voltage check point The output level of the sta...

Page 15: ...TION dE SQUELCH LEVEL nL Top Panel Top panel Top panel Top panel Loosely couple the frequency counter to the antenna connec tor Connect an RF power meter to the antenna connector Connect an FM deviation meter to the antenna connector through an attenuator Connect an SSG to the antenna connector and a SINAD meter with 8 Ω load to the SP jack 156 8000 MHz 5 0 W 0 8 W 0 45 W 4 3 kHz More than 12 dB S...

Page 16: ...200006980 S COIL ELJRE R10G F B L120 6200002430 S COIL NL 252018T 082J T L121 6200002410 S COIL NL 252018T 056J T L122 6200003550 S COIL MLF1608A 4R7K T B L130 6200007760 S COIL LQW2BHN82NJ01L B L131 6200007760 S COIL LQW2BHN82NJ01L B L132 6200008190 S COIL 0 25 1 9 8TL 80N B L133 6200008190 S COIL 0 25 1 9 8TL 80N B L150 6200003680 S COIL LQH31MNR82M01L B R1 7510001660 S THRMISTOR NTCG16 4LH 473K...

Page 17: ...3 V 47 kΩ B R340 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ B R341 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ B R343 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kΩ B R345 7030003760 S RESISTOR ERJ3GEYJ 474 V 470 kΩ B R346 7030003200 S RESISTOR ERJ3GEYJ 100 V 10 Ω T R350 7030003760 S RESISTOR ERJ3GEYJ 474 V 470 kΩ B S Surface mount 6 2 REF ORDER DESCRIPTION M NO NO M Mounted side T Mounted on the Top ...

Page 18: ...K B C206 4030017460 S CERAMIC ECJ0EB1E102K B C207 4030016930 S CERAMIC ECJ0EB1A104K B C220 4510005430 S ELECTROLYTIC ECEV0JA220SR B C221 4030016790 S CERAMIC ECJ0EB1C103K T C222 4030016790 S CERAMIC ECJ0EB1C103K T C223 4030016790 S CERAMIC ECJ0EB1C103K T C224 4510005430 S ELECTROLYTIC ECEV0JA220SR B C225 4030011810 S CERAMIC C1608 JB 1A 224K T B C226 4030016790 S CERAMIC ECJ0EB1C103K T C227 455000...

Page 19: ...10014190 CONNECTOR 2497 ANT CONNECTOR SP1 2510001092 SPEAKER 036D0801B FG W1 8900010960 CABLE OPC 1129 M Mounted side T Mounted on the Top side B Mounted on the Bottom side S Surface mount 6 4 REF ORDER DESCRIPTION M NO NO ...

Page 20: ...erminal Y608 1 MP38 8810009510 Screw PH BT M2x4 NI ZU 1 MP39 8810009510 Screw PH BT M2x4 NI ZU 7 MP40 8510015970 2691 grounding plate 1 MP42 8810009560 Screw PH BT M2x6 ZK 2 MP43 8510015980 2691 main shield 1 MP44 8930024961 891terminal rubber A 1 3 MP46 8930060780 2691 PW button 1 MP47 8930060790 2691 PW holder 1 REF ORDER DESCRIPTION NO NO CHASSIS PARTS QTY J 250 6450001910 Connector HSJ1594 010...

Page 21: ... 32 0 3 1 32 136 5 11 32 UNIT abbreviations C CHASSIS PARTS M MAIN UNIT NOTE1 Once the following parts are removed a O ring or sealing must be replaced with new one before reattachement Mother part Daughter part for relayted replacement J31 C Antenna connector MP14 C Sealing washer MP24 C Screw MP25 C Sealing washer NOTE2 The glue must be applied to the areas when the front panel is replaced with ...

Page 22: ...MP4 8930047830 Leg cushion C 2 CHASSIS REF NO ORDER NO DESCRIPTION R1 7070001130 RESISTOR 120 ERG2SJ R2 7070001140 RESISTOR 150 ERG2SJ R3 7010007100 RESISTOR 1K PSD1 4V J1 6510023070 CONNECTOR HEC2305 01 250 DS1 5040001390 LED TLG124A EP1 0910054642 PCB B 5787B CHARGE UNIT MECHANICAL PARTS Screw abbreviations A0 B0 BT Self tapping NI ZU Nickel zinc SUS Stainless 16 4V No load 13 0V Charge 16 4V No...

Page 23: ...R AND FET S B E C B E C DTA144 EUA Symbol 16 B E C G1 G2 S D 2SA1588 GR Symbol ZG 2SB1132 Q Symbol BAQ 2SC2714 Y Symbol QY 2SC4213 B Symbol AB B E C B C E B E C B E C B E C B E C E1 E2 B2 C1 B1 C2 G S S S S G G D D D Bottom view DIODES MA77 Symbol 4B RB706F 40 T106 Symbol 3J 1SV307 Symbol TX HVU350 B Symbol B0 MA2S077 Symbol S 1SS375 Symbol FH MA728 Symbol 2A DA221 TL Symbol K HVC376B TRF Symbol B...

Page 24: ...N UNIT TOP VIEW DS246 16 SCN H L SQL CH WX VOL VOL LOCK MONI U I C DUAL TAG TAG 9 SP1 CLONE SPO AFOUT MIC GND Mic The combination of this page and the next page shows the unit layout in the same configuration as the actual P C Board ...

Page 25: ...9 2 BOTTOM VIEW CLONE SPO AFOUT MIC GND J250 ANT MIC MC250 The combination of this page and the previous page shows the unit layout in the same configuration as the actual P C Board ...

Page 26: ...5V REG R5 REG V5 REG T5 CPU 5V RESET CPU5V RESET ATIS EEPROM LCD KEY LED SW LED BTYPE HV GND EXT JACK J250 VCO Q150 3SK299 D91 RB706F MAIN UNIT CHASSIS REF OSC 21 250 MHz Q20 DTC144EUA D20 MA2S077 D21 MA77 IC50 NJM2125F Q351 DAT144EUA IC170 TA31136FN FI170 CFWM450E 450 kHz IC190 M62363FP DS246 L3 0018TAY 1 Q240 DTC144EUA IC340 BR24L16FV IC360 IC220 NJM2870F05 IC341 BD5242FVE Q223 DTC144EU Q224 XP6...

Page 27: ... 036D0801B 1 2 4 3 GND D350 DA221 R353 1 k CPU5V R351 1 k MICM MICM DET R253 2 2 k 5V R255 150 k R271 33 k R272 180 k C265 150 P R273 18 k R279 820 R276 180 k C263 0 01 R286 10 k AFOUT R284 10 R350 470 k CPU5V TEMPV R346 10 CPU5V CPU5V CPU5V R362 1 k R305 47 k R304 47 k X360 CSTCR7M98G53 RC CP360 TDEC WET WET R361 1 k R360 1 k R363 1 k R364 1 k SCK SDATA PLST DAST ESCK ESCK ESDA ESDA RESET BTYPE R...

Page 28: ...001 C30 0 001 C11 2 2 C22 9 P C26 47 P R23 1 k D20 MA2S077 D21 MA77 C31 0 001 R29 390 R30 68 k C36 0 001 R31 680 R32 390 C50 0 001 R53 100 R52 4 7 k C52 0 001 R55 3 3 k C61 33 C62 0 001 C63 470 P C67 470 P L55 31 nH MP50 R75 100 R71 100 C70 91 P C75 22 P C71 30 P C82 18 P C380 0 001 C81 18 P C83 22 P C85 24 P C86 9 P R82 10 k C88 0 001 C68 47 P C73 0 001 R76 150 R72 47 L53 18 nH R384 2 2 k C59 470...

Page 29: ......

Page 30: ...S 14008MZ C2 2003 Icom Inc 1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan ...

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