PRESIDENT JOHNNY III ASC 12/24 Service Manual Download

Page: 3 / 66

3-RECEPTION:

-Maximum sensitivity at 20dB sinad

-0,5µV(-113dBm) AM

-Audio frequency response

-From 300Hz to 3kHz in AM

-Adjacent channel selectivity

-Superior to 60dB

-Frequency image rejection

-Superior to 60dB

-Intermodulation response

-Superior to 54dB

-Maximum audio power

-2W

-Squelch sensitivity

-Threshold 0,2µV(-120dBm)/Tight 1mV(-47dBm)

Current drain

-300mA nominal/600mA maximum

Summary of Contents for JOHNNY III ASC 12/24

Page 1: ...JOHNNY III HARRY III ASC 12 24 SERVICE MANUAL...

Page 2: ...275Mhz Channel step 10KHz Class of emission AM A3E Power supply 12V 24V From10 8V to 31 2V Antenna impedance 50 Dimensions in mm 125 W x150 D x45 H Weight 0 7Kg 2 TRANSMISSION Frequency allowance 300H...

Page 3: ...nse From 300Hz to 3kHz in AM Adjacent channel selectivity Superior to 60dB Frequency image rejection Superior to 60dB Intermodulation response Superior to 54dB Maximum audio power 2W Squelch sensitivi...

Page 4: ...405Mhz 40 channels FM UK 4W from 27 60125Mhz to 27 99125Mhz In 27 channels AM FM 4W from 26 965Mhz to 27 275Mhz Channel step 10KHz Class of emission AM A3E FM F3E Power supply 12V 24V From10 8V to 31...

Page 5: ...nse From 300Hz to 3kHz in AM FM Adjacent channel selectivity Superior to 60dB Frequency image rejection Superior to 60dB Intermodulation response Superior to 54dB Maximum audio power 2W Squelch sensit...

Page 6: ...s Test equipement required Frequency counter 200 Mhz HF Generator DC Volmeter BF Volmeter Distortiometer HF Volmeter Wattmeter Dummy load Osilloscope FM linear detector Load 8 AF generator Sinad meter...

Page 7: ...mode Channel 20 RT302 Connect a frequency counter to TP200 and adjust RT302 to reach 37 900MHz 3 AM FM EU TX RX mode Channel 40 Connect a voltmeter to TP 303 and check Tx Channel 40 2 8V 0 2V Rx Chan...

Page 8: ...ALIGNMENT VCO PLL TP 200 TP 303...

Page 9: ...27 115 37 810 14 27 125 37 820 15 27 135 37 830 16 27 155 37 850 17 27 165 37 860 18 27 175 37 870 19 27 185 37 880 20 27 205 37 900 21 27 215 37 910 22 27 225 37 930 23 27 255 37 950 24 27 235 37 93...

Page 10: ...27 110 37 805 14 27 120 37 815 15 27 130 37 825 16 27 150 37 845 17 27 160 37 855 18 27 170 37 865 19 27 180 37 875 20 27 200 37 895 21 27 210 37 905 22 27 220 37 915 23 27 250 37 945 24 27 230 37 92...

Page 11: ...7 850 56 26 715 37 410 17 27 165 37 860 57 26 725 37 420 18 27 175 37 870 58 26 735 37 430 19 27 185 37 880 59 26 745 37 440 20 27 205 37 900 60 26 755 37 450 21 27 215 37 910 61 26 765 37 460 22 27 2...

Page 12: ...13 27 115 37 810 14 27 125 37 820 15 27 135 37 830 16 27 155 37 850 17 27 165 37 860 18 27 175 37 870 19 27 185 37 880 20 27 205 37 900 21 27 215 37 910 22 27 225 37 930 23 27 255 37 950 24 27 235 37...

Page 13: ...38 42625 15 27 74125 38 43625 16 27 75125 38 44625 17 27 76125 38 45625 18 27 77125 38 46625 19 27 78125 38 47625 20 27 79125 38 48625 21 27 80125 38 49625 22 27 81125 38 50625 23 27 82125 38 51625 24...

Page 14: ...25 37 720 7 27 035 37 730 8 27 055 37 750 9 27 065 37 760 10 27 075 37 770 11 27 085 37 780 12 27 105 37 800 13 27 115 37 810 14 27 125 37 820 15 27 135 37 830 16 27 155 37 850 17 27 165 37 860 18 27...

Page 15: ...each 4W on the wattmeter 2 Same as 1 Connect a dummy load to jack antenna Check that the RF meter displays S9 3 FM EU TX Mod 30 mV 1 KHz CH 20 RT303 For HARRY III ASC Only Adjust RT303 to reach 1 2KHz...

Page 16: ...ALIGNMENT TRANSMITTER...

Page 17: ...nnect sinad meter to jack EXT speaker and adjust L12 for maximum sensitivity 20dB sinad 3 AM EU Channel 20 Middle volume level No squelch active Connect HF generator to jack antenna adjusted at 67dBm...

Page 18: ...ALIGNMENT RECEIVER L 12...

Page 19: ...JOHNNY III ASC HARRY III ASC 12 24 BLOC DIAGRAM...

Page 20: ...d into PLL IC IC301 2 FREQUENCY STABILITY Overall frequency stability of the unit is determined depending on crystal oscillator X301 Stability rank of X301 is 25ppm maximum in the temperature range fr...

Page 21: ...C GATE D1 D2 RF ATT Q1 RF AMP BPF Q2 Q3 1st Mixer D13 ASC NOISE DET IC6 AGC AMP Q8 IF AMP 2nd D8 ANL IC7 ASC NOISE AMP D12 AGC DET IC404 RESET IC6 SQ AMP Q5 2nd Mixer Q6 IF AMP 1st Q420 Q423 PWR REGU...

Page 22: ...into PLL IC IC301 2 FREQUENCY STABILITY Overall frequency stability of the unit is determined depending on crystal oscillator X301 Stability rank of X301 is 25ppm maximum in the temperature range fro...

Page 23: ...INAL MATCH Q502 FINAL Q302 VCO BUFF Q414 MIC SEL Q406 TONEMUT IC405 EEPROM IC402 2 5V REF Q421 Q424 TX 8V REGU Q402 AM MOD MUTE Q409 Q412 COMP DET DC AMP Q413 VOX MIC Q415 AMC DET IC491 12V DC DC Q416...

Page 24: ...JOHNNY III ASC HARRY III ASC 12 24 SCHEMATIC DIAGRAM...

Page 25: ......

Page 26: ......

Page 27: ......

Page 28: ......

Page 29: ......

Page 30: ......

Page 31: ......

Page 32: ......

Page 33: ...JOHNNY III ASC HARRY III ASC 12 24 COMPONENT LAYOUT...

Page 34: ......

Page 35: ......

Page 36: ......

Page 37: ......

Page 38: ...JOHNNY III ASC HARRY III ASC 12 24 COMPONENTS LIST...

Page 39: ...7PF 50V J CH BCNA812704G C021 C CERAMIC M L 1005 TAPE 33PF 50V J CH BCNA813304G C022 C CERAMIC M L 1005 TAPE 0 01uF 25V K B BCNB511035G C023 C CERAMIC M L 1005 TAPE 220PF 50V J CH BCNA812214G C027 C C...

Page 40: ...K B BCML811035G C207 C CERAMIC M L 1005 TAPE 0 1u 10V K B BCNB111045G C208 C CERAMIC M L 1005 TAPE 0 01uF 25V K B BCNB511035G C209 C CERAMIC M L 1005 TAPE 220PF 50V J CH BCNA812214G C210 C CERAMIC M L...

Page 41: ...B BCNB811025G C405 C CERAMIC M L 1005 TAPE 0 1u 10V K B BCNB111045G C406 C CERAMIC M L 1005 TAPE 0 1u 10V K B BCNB111045G C407 C CERAMIC M L 1005 TAPE 0 0033u 50V K B BCNB813325G C408 C CERAMIC M L 1...

Page 42: ...NB811025G C458 C CERAMIC M L 1005 TAPE 0 1u 10V K B BCNB111045G C459 C CERAMIC M L 1005 TAPE 0 1u 10V K B BCNB111045G C461 C CERAMIC M L 1005 TAPE 0 01uF 25V K B BCNB511035G C489 C CERAMIC M L 3216 TA...

Page 43: ...09 L009 INDUCTOR MOLDED CHIP LZ 226 SGMI1608K100K T BLZG0226100 L010 INDUCTOR WIND CHIP TAPE LZ 393 SDWL3225F471JTF BLZG0393471 L013 COIL LD 332 FDL 332 BLDH0332001 L014 COIL LD 332 FDL 332 BLDH033200...

Page 44: ...GR RTK P TAPE BDBN1259001 Q407 TRANSISTOR DB 1343 L2SD1781KRLT1G BDBN1343001 Q408 TRANSISTOR DB 1259 KTC3875S GR RTK P TAPE BDBN1259001 Q409 TRANSISTOR DB 1259 KTC3875S GR RTK P TAPE BDBN1259001 Q410...

Page 45: ...44G R042 R CARBON FIXED CHIP 1005 100K 1 16W J 1005 TAPE BRFA161044G R043 R CARBON FIXED CHIP 1005 1M 1 16W J 1005 TAPE BRFA161054G R044 R CARBON FIXED CHIP 1005 100K 1 16W J 1005 TAPE BRFA161044G R04...

Page 46: ...E BRFA161024G R204 R CARBON FIXED CHIP 1005 8 2K 1 16W J 1005 TAPE BRFA168224G R206 R CARBON FIXED CHIP 1608 47 1 16W J TAPE BRFC164704G R207 R CARBON FIXED CHIP 1005 2 2K 1 16W J 1005 TAPE BRFA162224...

Page 47: ...414 R CARBON FIXED CHIP 1005 2 7K 1 16W J 1005 TAPE BRFA162724G R415 R CARBON FIXED CHIP 1005 10K 1 16W J 1005 TAPE BRFA161034G R416 R CARBON FIXED CHIP 1005 330K 1 16W J 1005 TAPE BRFA163344G R417 R...

Page 48: ...16W J 1005 TAPE BRFA162224G R466 R CARBON FIXED CHIP 6432 82 1W J TAPE BRFC108204G R467 R CARBON FIXED CHIP 1005 3 9K 1 16W J 1005 TAPE BRFA163924G R468 R CARBON AXIAL LEAD 26 22K 1 6W J TAPE BRPA6122...

Page 49: ...4G R521 R CARBON FIXED CHIP 1005 3 3K 1 16W J 1005 TAPE BRFA163324G R522 R CARBON FIXED CHIP 1005 2 2K 1 16W J 1005 TAPE BRFA162224G R523 R CARBON FIXED CHIP 1005 10K 1 16W J 1005 TAPE BRFA161034G R52...

Page 50: ...K 0B 47K TR BRTG0590473 TP201 TEST PIN TP 138 IPS 1820 01 PT BTPG0138001 B551 PCB FRONT PA 503AA 1 6 BPAG0503AA1 C551 C CERAMIC M L 1005 TAPE 0 01uF 25V K B BCNB511035G C552 C CERAMIC M L 1608 TAPE 0...

Page 51: ...PA 503AA 5 6 BPAG0503AA5 D801 DIODE LED LTST C190KFKT BDAG1031001 D802 DIODE LED LTST C190KFKT BDAG1031001 B851 PCB LED R PA 503AA 6 6 BPAG0503AA6 D851 DIODE LED LTST C190KFKT BDAG1031001 D852 DIODE...

Page 52: ...8 C CERAMIC M L 1005 TAPE 0 1u 10V K B BCNB111045G C019 C CERAMIC M L 1005 TAPE 27PF 50V J CH BCNA812704G C020 C CERAMIC M L 1005 TAPE 27PF 50V J CH BCNA812704G C021 C CERAMIC M L 1005 TAPE 33PF 50V J...

Page 53: ...V K B BCNB511035G C066 C CERAMIC M L 1005 TAPE 33PF 50V J CH BCNA813304G C067 C CERAMIC M L 1005 TAPE 0 0047UF 50V K B BCNB814725G C068 C CERAMIC M L 1005 TAPE 0 01uF 25V K B BCNB511035G C069 C CERAMI...

Page 54: ...MK107SD103JA T BCZG0387001 C308 C CERAMIC M L 1005 TAPE 100PF 50V J CH BCNA811014G C309 C CERAMIC M L 1005 TAPE 100PF 50V J CH BCNA811014G C310 C CERAMIC M L 1005 TAPE 10PF 50V D CH BCNA811002G C311 C...

Page 55: ...0UF 10V M C 411 BCHL111016G C436 C CERAMIC M L 1608 TAPE 0 1UF 50V K B BCML811045G C437 C CERAMIC M L 1608 TAPE 0 01UF 50V K B BCML811035G C438 C CERAMIC M L 1608 TAPE 0 1UF 50V K B BCML811045G C439 C...

Page 56: ...F BDAG1380001 D304 DIODE KDS160E RTK P BDAG1270001 D305 DIODE KDS160E RTK P BDAG1270001 D401 DIODE KDS160E RTK P BDAG1270001 D402 DIODE KDS160E RTK P BDAG1270001 D403 DIODE KDS160E RTK P BDAG1270001 D...

Page 57: ...H BLZG0365398 L303 INDUCTOR MOLDED CHIP LZ 365 SDWL2520CR39GSTF 0 39UH BLZG0365398 L304 INDUCTOR MOLDED CHIP LZ 226 SGMI1608GR47K T BLZG0226478 L401 LZ INDUCTOR MOLDED CHIP LZ 381 UPZ1608E221 2R0TF BL...

Page 58: ...SISTOR DB 1296 ST2SD882EU BDBN1296001 Q418 TRANSISTOR DB 1259 KTC3875S GR RTK P TAPE BDBN1259001 Q419 TRANSISTOR DB 1259 KTC3875S GR RTK P TAPE BDBN1259001 Q420 TRANSISTOR DB 1259 KTC3875S GR RTK P TA...

Page 59: ...524G R040 R CARBON FIXED CHIP 1005 560 1 16W J 1005 TAPE BRFA165614G R041 R CARBON FIXED CHIP 1005 150K 1 16W J 1005 TAPE BRFA161544G R042 R CARBON FIXED CHIP 1005 100K 1 16W J 1005 TAPE BRFA161044G R...

Page 60: ...1034G R093 R CARBON FIXED CHIP 1005 100K 1 16W J 1005 TAPE BRFA161044G R094 R CARBON FIXED CHIP 1005 680K 1 16W J 1005 TAPE BRFA166844G R095 R CARBON FIXED CHIP 1005 47K 1 16W J 1005 TAPE BRFA164734G...

Page 61: ...RBON FIXED CHIP 1005 100 1 16W J 1005 TAPE BRFA161014G R321 R CARBON FIXED CHIP 1005 100K 1 16W J 1005 TAPE BRFA161044G R322 R CARBON FIXED CHIP 1005 3 3K 1 16W J 1005 TAPE BRFA163324G R324 R CARBON F...

Page 62: ...A164714G R439 R CARBON FIXED CHIP 1005 6 8K 1 16W J 1005 TAPE BRFA166824G R440 R CARBON FIXED CHIP 1005 1K 1 16W J 1005 TAPE BRFA161024G R441 R CARBON FIXED CHIP 1005 2 2K 1 16W J 1005 TAPE BRFA162224...

Page 63: ...2 R CARBON FIXED CHIP 1005 1K 1 16W J 1005 TAPE BRFA161024G R493 R CARBON AXIAL LEAD 26 4 7K 1 6W J TAPE BRPA614724G R494 R CARBON AXIAL LEAD 26 22K 1 6W J TAPE BRPA612234G R495 R CARBON FIXED CHIP 10...

Page 64: ...CHIP 1005 10K 1 16W J 1005 TAPE BRFA161034G R543 R CARBON FIXED CHIP 1005 220K 1 16W J 1005 TAPE BRFA162244G R544 R CARBON FIXED CHIP 1005 220K 1 16W J 1005 TAPE BRFA162244G R545 R CARBON FIXED CHIP 1...

Page 65: ...PE BRFC163914G R559 R CARBON FIXED CHIP 1608 0 1 16W J TAPE BRFC160004G R560 R CARBON FIXED CHIP 1608 0 1 16W J TAPE BRFC160004G R562 R CARBON FIXED CHIP 1005 100 1 16W J 1005 TAPE BRFA161014G R563 R...

Page 66: ...LATION SHEET YY 1659 WCP23 16 9 4 2 0 BYYG1659001 DP551 LIQUID CRYSTAL DISPLAY DL 537 912 442A 4115 BDLG0537001 FC501 FLAT CABLE WF 402 3 54 3 35PIN BWFG4020549 SP501 SPEAKER SP 597 LYS S0077 016 001R...

Search results

Summary of Contents for JOHNNY III ASC 12/24

Reviews:

Related manuals for JOHNNY III ASC 12/24

Brands by name

Popular brands

PRESIDENT JOHNNY III ASC 12/24, Service Manual

Search results

Summary of Contents for JOHNNY III ASC 12/24

Reviews:

Related manuals for JOHNNY III ASC 12/24

Brands by name

Popular brands