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maxon sd-125 rf link module

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2. 6 5 4 3 2 1 REVISIONS DESCRIPTION KTC3875S v A RELEASED TO MANUFACTURING JW 10 98 dee 1 R41 d vec 2 L toe III ee 8 C55 d peus R56 120 VCO TX SECTION c Ga 3 220 0 R42 L5 2667 TUE R36 12K 18NH B20NH dL OR m S DS C77 CON2 R35 E 22P D POWER AMP MODULE UHF SCHEMATIC 7 G UPP9401 7 5 6 m
3. 50125 RF MAIN BOARD ASSEMBLY 650 020 0029 1 ALL VALUES ARE IN OHMS MICROHENERIES OR MICROFARADS 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPECIFIED 914 TX 5 020 gn R 4 1 100 1 1 Rd C55 1 745 470P 1 470P ER AMP MODUI SCHEMATIC 05 215 655 R36 R42 15 V H F 1 17 18 L11 UPP9401 0 001 ANT 1UF OR 12k 57 51 1 gt T T e VCO TX S 1 R35 C56 D C49 1 22P N 770 230 001 2 6 8P 470K N F 8 2K 0 R58 8435 d cae 90 Tes us 470K E RG 18 2 36PF 22 MMBR951 MMBR951 T R26 1 1 18 0 R32 R uL 4 N 770 030 001 7 i jos 300 R33 1 1 A 3 3K C57 1 We d ee ce Er ces 06 470P B2 UPP9401 R49 RAT 2R2 022 veg gt 6 Late db T C47 BB 654 T R51 282 AR ARE cao RE SERRE ca ew ee od PRE OUT 470 7 470P 39 ci 470K ALL 179 470 10 IC3B C61 4 C65 vec T R54 R57 L 1 79 1398 tk OEN 100K 1 B aT cont zi 021 ORCAD FILE 50200029 5 s KTC3875S FILES 6 15 m ALL AUTOCAD FILE 1
4. ITEM QUANTITY PART NUMBER DESCRIPTION 1 4 330 110 0082 SCREW M3X8 2 1 560 080 0053 UPPER COVER 3 1 330 220 0038 GASKET 4 4 330 110 0047 SCREW M2X6 5 1 NOT AVAILABLE SHIELD CAN 6 1 NOT AVAILABLE SHIELD 7 2 NOT AVAILABLE BRACKET 8 1 650 230 0017 MODULE 400 430 2 8 1 650 230 0016 P A MODULE 440 470MHz 8 1 650 230 0012 MODULE 148 174MHz 9 1 NOT AVAILABLE HEAT SINK 10 2 330 110 0042 SCREW M2 5x10 11 1 NOT AVAILABLE _ SHIELD 12 1 NOT AVAILABLE SHIELD 13 1 560 080 0054 COVER 14 1 NOT AVAILABLE COMPLIANCE LABEL 15 1 140 080 0016 CONNECTOR 50 OHM 16 2 330 115 0001 JACK SCREW P O 17 1 330 220 0039 GASKET 18 1 950 010 0033 D SUB 9 CONNECTOR 18 19 1 650 110 0019 FRONT END MODULE 400 430 2 19 1 650 110 0017 FRONT END MODULE 440 470MHz 19 1 650 110 0012 FRONT END MODULE 148 174MHz 20 1 NOT AVAILABLE RF PCB ASSY 400 430 2 20 1 NOT AVAILABLE RF ASSY 440 470MHz 20 1 NOT AVAILABLE RF PCB ASSY 148 174MHz 21 1 650 100 0002 TCXO MODULE 22 4 330 270 0018 STANDOFF HEX M F 1 1 8x4xM2 6 23 1 650 030 0026 VCO MODULE 400 430MHz 23 1 650 030 0023 VCO MODULE 440 470MHz 23 1 650 030 0025 VCO MODULE 148 174MHz 10 X2 24 1 NOT AVAILABLE SHIELD PLATE 25 1 NOT AVAILABLE DIGITAL PCB ASSY 26 1 920 060
5. REVISIONS REV DESCRIPTION DATE A RELEASED TO MANUFACTURING JW 10 98 R430 R428 3 1M CON404 10K Ra OPTION gt 5 14 CIX 12 BUsv sa SER R452 10 CARRIER DETECT 100K PTT IN LK3 w RX AUDIU IN a UNMUTE w 7 6 DUT D RTS CON401 2 SER BUSY DET 1 CETT Dur 2 SERIAL IN 5 T CC IKIO MIC_INCAF L caos n ce Sith d x H 01 04040 0 022 t f B 7 1 406680 WADAG t CH Swe 8 LK6 LKS C405 14066 0 C430 C431 C432 C441 C442 SPK DUT 10 12 47p GND n LK8 7 6 0 001 0 001 0 001 0 001 0 001 Sw3 12 LINK2 5v C408 SERIAL 5 a 5 14 9 5 4 15 LK7 t 50 125 LINK R453 R423 4 N F 1 LAA 10401 C460 1 i C447 KRAI04S 00 9 C448 33uF 725V MC14066BD ho C406 04050 0 001 0 001 0 001 T U404B U405C 0 022 LM3B4 Ls R467 3 0 LM324 4 R422 47K 4 vB 10K C465 KRA104S 5 5416 M R495 Deo 0403 gt Vb e ps 332 4 U406B 0998 8160 4 01 5 LM324 514412 10 C463 C810 R437 R409 407 T R496 R433 colt i 100K 10K
6. 50 FRONT END 400 30ME Ras Have eR iR edo 50 FRONT END 440 A70ME2 K 50 POWER AMPLIFIER 148 174MHz 5 POWER AMPLIFIER 400 430MHz 5 POWER AMPLIFIER 440 470MHz 5 DIGITAL PCB sen Tac ca et diat dE ra Vl 52 RF PCB ASSEMBLY 148 174MHZ 53 RF PCB ASSEMBLY 400 430 2 54 RF PCB ASSEMBLY 440 470 2 54 EXPLODED VIEW amp PARTS 55 1 October 98 MAXON SD 125 RF LINK MODULE SPECIFICATIONS GENERAL Equipment Data radio Performance Specifications TIA EIA 603 amp ETS 300 113 Ban ERT ERE aw eae UHF VHF Channel Spacing cee 25 kHz 12 5 kHz programmable RF Output are ano eR e 5 1 watt Modulation F3D F3E Intermediate 45 1 MHz amp 455 kHz Number 16 F
7. 18 COMPONENT 19 TROUBLESHOOTING ME vee 20 VOLTAGE CHART aaa aee Ex 21 SD 125 DIGITAL BOARD COMMON PARTS LIST 650 010 0029 25 SD 125 01 400 430MHz RF BOARD PARTS LIST 650 020 0027 37 SD 125 02 440 470MHz RF BOARD PARTS LIST 650 020 0026 30 SD 125 V2 148 174MHz RF BOARD PARTS LIST 650 020 0029 33 COMPONENT PINOUT FU sarete Gabe a kaga aa aa 37 TIRING DIAGRAM BE IA dE MS 41 SCHEMATICS BLOCK DIAGRAM amp 5 43 BLOCK DIAGRAM RR don nn 43 DIGITAL BOARD SCHEMATIC Feux Ra ae uc EA ve 44 RF BOARD 148 174MHz SCHEMATIC 45 RF BOARD 400 430MHz SCHEMATIC 46 RF BOARD 440 470MHz SCHEMATIC 47 TOKO SCHEMATIC 48 48 October 98 MAXON SD 125 RF LINK MODULE VCC 49 VCO AGAMN o ka ag CR t e d a a se TR ded 49 FRONT END 148 174 2
8. Min 3 5 6 0 12 5 kHz Channel Min 1 5 Max 4 0 RECEIVER Sensitivity 124 UHF lt 117 dBm VHF lt 118 dBm Nom Condition UHF lt 115 dBm VHF lt 116 dBm Extreme Condition Amplitude lt 3 dB Adjacent Channel Selectivity 25 kHz Channel Spacing gt 60 dB Nom gt 55 dB Extreme Condition 12 5 kHz Channel gt 50 dB Nom gt 45 dB Extreme Condition Spurious Response 70 dB 100 kHz 4 GHz Image gt 70 IF RESPONSE EE y 5 Ag ana NR V RR gt 70 lt RR E KR R gt 70 Intermodulation Response Rejection 25 50 area ipee die es arse ak 65 dB 50 KAZ 100 KHZ aas 65 dB Conducted Spurious Emission Nominal Conditions 9kHz 1GHz lt 57 dBm GAZ 1275 GHZ ert SIR 47 dBm PAGE 3 October 98 MAXON SD 125 RF LINK MODULE Distortion ere mme ye rtr hy en hes lt 5 Nom lt 10 Extreme condition RX Hum amp Noise 25 0 KHz TR EP NUES
9. r 8 prr i R501 2 7K L504 R505 2 33 Q501 0502 1 2UH 0503 MMBR951 C502 BLT50 C505 C515 2 7K C501 27P 36P 0501 0502 C515 15 MMBR951 C502 reas BLT50 C505 0 01 kd iu 27NH ni L507 L508 1502 4 if aT e if 6 2 1 2UH R509 150NH 5 56 R508 R502 L503 82 8 2K yc R506 n2 C507 C508 509 C514 L306 C509 SES 502 L501 4 C504 12P 4 1504 l cso7 C508 4 C513 C514 22 C500 20P 33P NF 18P 3 56NH 18 R503 8T 220P 200 47P C517 82P 24P 4 1 216549 1 506 82 eT _ 5 R510 _ 220P 220P 0 0 01 0 01 2 9 D501 R504 e Ld Ld 2 t 7 KDS181 22K C511 0 01 TEES 0 001 R503 R506 6 8 22 3 _ aaa NOTES NOTES POWER AMP 148 174MHz POWER AMP 400 430MHz UNLESS OTHERWISE SPECIFIED 770 230 0012 UNLESS OTHERWISE SPECIFIED 770 230 0017 2 ALL RESISTORS ARE 1 10W 5 UNLESS 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPECIFIED OTHERWISE SPECIFIED R504 2 7K Q501 MMBR951 C502 C515 C501 8P 43P 22P 4 IN 91501 C504 C514 L506 7P NOTES 1 ALL VALUES ARE IN OHMS MICROHENRIES OR MICROFARADS POWER AMP 440
10. 71 dig _ prp guias eom oo MY 9 C135 R117 51 4 c2 5 BUSY d 5 470P 10 6 3 470P GND MOD GND 22 Y E N F N F 90 d 18 1 2 0 1 P P D CON18 1 2 3 4 5 6 7 8 IC1 118 d TK11450 R129 0 4 R94 P 3 7777 126 1K X1 JADOK T 44 645M ot Ax N F R78 R97 C121 L RIS 1 103 22K 100 Pun 20p gt R74 470P 4 7 10 470P 124 C125 N F ote cea 22K R75 2 w 0 1 3210796 C152 L 470P k N FT wr C122 C123 1 IC7B 1 R98 0 01 0 01 ai 1 R128 8132 LM358 Q3 06 22K 7 5y 128 T gt C126 A 99 31 R10 R107 0 01 770 020 0026 PLT N F eee R76 ae C127 16 Lt 1 AutoCAD R13c4 er NS 10K 0 01 L RTOS C Eus 10 20 98 KRATOAS 119 2 C102 n C12B R1049 cr 22K C 470P 9D 3608 T 0 001 R82 47 10 S 10K 455F KDS181S maxen T c101 33K L A World of Communications 470P 104E R102 D13 CT RI c12 C104 883 ICBB 22K KD1B1S cist Z SD 125 10 ioo VT 10062 al 0 001 E 4s5nr RF SCHEMATIC DIAGRAM Cue T U2 440 470MHz 100k 770 020 0026 22K PAGE 47 October 98 R701 PAGE 48 October 98 R706 47K
11. gt 5 D D Ras C46 ms 770 230 0017 pa 678 3 18 it 470 N F 47 6 T 1 K U 470K BFR92 MMBRSST C72 C73 C74 C75 R26 R51 N F 13PF 20PF 7P C57 18 55200 2 72 R27 R58 470 P N 770 030 0026 4 7K 592 L5 470K 7T VCO MODULE UHF SCHEMATIC 545 R47 252 C66 R109 veg 5 1 14 R48 2R2 022 470P Y R69 C47 R28 R32 R512R2 KTA1663 D6 470K 220 _220 m UPP9401 PRE OUT 300 70 GIERA 470 KTC387 4 sy 10 IC3B zu vec Ras C79 0 1 LM358 10 10 7 539 rig 120 470P gt K 680 R25 018 TE Ad R46 4 7K 18NH E pd 2 2K 4 7M R24 Q34 ORCAD FILE 50200026 5 BAND 2 ca AUTOCAD FILE 770 020 0027 0WG 012 37 470 OX R64 22 LIBRARIES 50125811 08 2 BFR92A 5 6 C42 PADS FILE P0200026 JOB DU E i 84 3 1 7 1 0125 RF MAIN BOARD ASSEMBLY 650 020 0027 C een OE T2 22P VCO RX SECTION IT 7 C85 R91 R90 R21 R22 AAT 240 240 ini NOTES 339 4 7K ae OUT FARADS 100 EN HF SCHEMATIC 1 ALL VALUES ARE IN OHMS MICROHENERIES OR MICROFARAD pem 22 6PF gt FRONT END U UNLESS OTHERWISE SPECIFIED R6 C34 2114 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE
12. 220K T ha C806 RSSI Mg R403 51 10K 0 R464 1 T 10 C805 100P 47K U403B 15 NAP cass LM339 t R404 Te pus NU bi sv 5 4 7uF R463 S 0404 D405 56 47K C402 104 2 4 Plelbeeri bobo 56V vp 18 5 je 7 1615 413121 9 0 345 6 5 3 1 9 jeliielo mV c803 16 3 C451 5 5 PPPPPPPP PPPPPPPP 330P vec avcc 2 or 5 AAAAAAAA BBBBBBBB CCCCCCCC DDDD C U 01234567 01234567 01834567 1423 M pusy 7 paas LM339 0 01 1 2406 14 KDS193 DN C804 R801 n 4 7K 6 NR C 5v t SIP 10K GND Uan D401 L sah 7 51678 SEFCTOSCBAR 8441 Rage R443 2 50 120 5 6V oo E T MK MK A AR 9403 2468 SS SI Y R435 R460 Case LM339 0402 10K CC ER DDD A NNNN D SP RTH401 10K 0 001 93 56 15 TQ 057 P CCCC D R484 peus s M 3B fess 8 WENG 3 LUIS 1K 2 CARRIER_DET 2 10K e em 0962 B ps R483 GND 3 1K RTSZPTT w 3 i RX DATA 5 K CH LINK TABLE C457 RA77 R465 1 1 R481 CTS 6 47uF 100 Sv 10K b 1K t 1 TX 2 SEL R448 naig nang 0407 MUTE 56 Pe 56v 10 R450 Sw401 6V GND n 33K 4 5v R445 AAR C446 C445 C444 C443 12 ay SNG 9324 1M
13. 12 8 MHz TCXO TCXO Assy P N 650 100 0002 9 Modulation GND Out Vcc 5V PAGE 40 October 98 MAXON SD 125 RF LINK MODULE 1 Audio In Data RX Pin2 Audio Out Data TX Pin3 PTT Pin4 GND Ground Pin5 B 8 18 Volts DC Pin6 Carrier Detect Squelch Pin7 N C No Connect Pin8 Switch Pin9 Speaker W EMM D SUB 9 CONNECTOR P N 950 010 0033 1 CON401 15 DIGITAL BOARD 650 010 0029 RF BOARD 650 020 0026 440 470MHz 650 020 0027 400 430MHz 650 020 0029 148 1 74MHz CON403 PAGE 41 October 98 MAXON SD 125 RF LINK MODULE Intentionally Left Blank PAGE 42 October 98 fe eS REVISIONS TCXO MODULE 1 REV DESCRIPTION DATE C 1 pc etd i A RELEASED TO MANUFACTURING JW 09 98 1 TCXO 12 8MHz 1 PLL CIRCUIT LEVEL SHFTER REEEBE TX VCO i LPF TEKA E 621 22 i 1 9501 9502 0503 1 cow 1 9202 203 1 ANIM t 1 ERE 0678 11 1 1 gt 4 1 1
14. PAGE 46 October 98 5 4 3 2 1 REVISIONS KTC3875S REV DESCRIPTION ens mre 8 914 PR A RELEASED TO MANUFACTURING JW 10 98 vec 1 _ B2 R37 109 1 2K R56 470P 126 020 7 C67 ras R42 15 470P a TUF 12K 18NH 56 aD ES DS C77 R35 6 8P D POWER AMP MODULE UHF SCHEMATIC p 5
15. D702 MMBV109 T C X O 770 100 0002 C705 100pF MMBR9426 C704 180pF R712 39K Q701 R715 Q702 9426 NOTES 1 ALL VALUES ARE IN OHMS MICROHENRIES OR MICROFARADS UNLESS OTHERWISE SPECIFIED 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPECIFIED 0 9 STREENG D301 15 217 C204 0201 1 2P 15 217 VCO RX C212 R205 0 001 2 2K C213 2 2K C208 47 C205 1 2P 0202 1SV217 m L203 225 4 5t R201 100K C312 0 001 C313 R304 2 2 C308 2 2P C306 0 5P L303 4 5T V C O 148 174MHz 770 030 0017 Q203 25 5084 0202 25 5084 C211 R207 220 Q303 4 28C5084 Q302 25 5084 1 13P OUT VCC 5 1205 VCO TX EAE R205 33nH 2 2K C217 4P 0203 4 2585084 C213 OUT R204 3P 2 2K C208 Q202 c202 20 CM C214 4 An 10P C205 C216 M R202 2P 220P 3 100K C203 B 0202 L204 0 75 18229 L203 820NH T8 1 2t C211 R203 N F C206 4 7K 7P C204 L202 EU 0201 1 5 470nH C215 15 229 0 001 5 C301 D301 220P 1SV229 T8 L303 1 2t 4 7K R307 270 V C O 400 430MHz 770 030 0026 NOTES 1 ALL VALUES ARE IN OHMS MICROHENRIES OR MICROFARADS UNLESS OTHERWISE SPECIFIED 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPE
16. 5 VHF RCVR MC3371D SO 16 NWRBAND 441 060 0007 R21 RES TF 33 5 1 16W 200 0603 741 102 1330 1 7 IC OP AMP LM358MX SO 8 DUAL 441 030 0006 R22 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 1 8 IC OP AMP DUAL TLO62CDR SO 8 441 030 0012 R23 RES TF 100 5 1 16W 200 0603 741 102 1101 L1 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R24 RES TF 5 6K 5 1 16W 200 0603 741 102 1562 L2 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R25 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 L3 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R26 RES TF 18 596 1 16W 200 0603 741 102 1180 L4 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R27 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 L5 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R28 RES TF 220 5 1 16W 200 0603 741 102 1221 L6 COIL CHIP 0 82UH NL252018T R82J 371 804 3R82 R31 RES TF 300 5 1 16W 200 0603 741 102 1301 L7 COIL SPRG 2X0 75X3T L SMD 350 000 0103 R32 RES TF 300 5 1 16W 200 0603 741 102 1301 L8 COIL SPRG 2X0 75X3T L SMD 350 000 0103 R33 RES TF 6 8K 5 1 16W 200 0603 741 102 1682 L11 COIL SPRG 2X0 75X3T L SMD 350 000 0103 R34 RES TF 18 596 1 16W 200 0603 741 102 1180 L12 COIL CHIP 1 2UH 5 6 NL252018T 1R2J 371 004 31R2 R35 RES TF 5 6K 5 1 16W 200 0603 741 102 1562 L13 COIL SPRG 1 0X0 35X7T R 350 000 0095 R36 RES TF 0 5 1 16W 200 0603 741 102 1000 L14 COIL CHIP 0 47UH NL252018T R47J 371 804 3R47 R37 RES TF 1 2K 5 1 16W 200 0603
17. C451 C452 C453 C454 C455 C456 C457 C458 C459 C460 C461 DESCRIPTION CAP CER 1UF 80 2096 16V Y5V 0805 CER 0 001UF 10 50V X7R 0603 CAP CER 0 022UF 10 50V X7R 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 CAP CER 47PF 5 50V COG 0603 CER 0 022UF 10 50V X7R 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 CAP CER 47PF 5 50V COG 0603 CER 0 047UF 20 80 25V Y5V 0603 CER 0 0056UF 1096 50V X7R 0603 CAP CER 0 0027UF 5 50V X7R 0603 CER 0 0047UF 10 50V X7R 0603 CAP CER 150PF 1096 50V X7R 0603 CER 0 0039UF 10 50V X7R 0603 CAP CER 47PF 5 50V COG 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 CER 0 047UF 20 80 25V Y5V 0603 CAP CER 470PF 10 50V X7R 0603 CAP TA 10UF 2096 6 3V 3216 A CER 0 047UF 20 80 25V Y5V 0603 CAP TA 100UF 20 6 3V D TA 47UF 20 16V 7343H CER 0 001UF 10 50V X7R 0603 CAP CER 0 001UF 10 50V X7R 0603 CER 0 001UF 10 50V X7R 0603 CER 0 001UF 10 50V X7R 0603 CER 0 001UF 10 50V X7R 0603 CER 0 001UF 10 50V X7R 0603 TA 4 7UF 20 10V A CAP CER 0 1UF 80 20 25V Y5V 0603 CAP CER 39PF 5 50V COG 0603 CAP CER 39PF 5 50V COG 0603 TA 1UF 20 25V 3216 CAP TA 10UF 20 6 3V 3216 A CER 0 001UF 10 50V X7R 0603 CER 0 001UF 10 50V X7R 0603 CAP CER 0 001UF 10 50V X7R 0603 CER 0 001UF 10 50V X7R
18. 0 01UF 10 25V X7R 0603 100 611 1103 C50 CAP 12PF 596 50V COG 0603 100 520 1120 C127 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C51 CAP CER 6 8PF 0 5PF 50V COG 0603 100 120 16R8 C128 CAP TA 4 7UF 20 10V A 102 023 0475 C53 CAP CER 1UF 80 2096 16V Y5V 0805 100 803 2105 C129 CAP ELE 10UF 16V 2096 3X5 5 0PT 081 032 3106 C54 CAP CER 220PF 596 50V COG 0603 100 520 1221 C131 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C55 CAP CER 470PF 1096 50V X7R 0603 100 621 1471 C133 CAP CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C56 CAP CER 6 8PF 0 5PF 50V COG 0603 100 120 16R8 C152 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C57 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C901 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C58 CAP CER 470PF 1096 50V X7R 0603 100 621 1471 C902 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C59 CAP CER 0 47UF 20 80 16V Y5V 0805 100 803 2474 C904 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 NOTES C905 CAP CER 68PF 5 50V COG 0603 100 520 1680 1 Components are not available assembly is non repairable C906 CAP CER 220PF 5 50V COG 0603 100 520 1221 PAGE 30 October 98 MAXON SD 125 RF LINK MODULE REF DESCRIPTION PART REF DESCRIPTION PART C907 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 Q903 TRANS PNP KTA2014 USM 870 100 0018 C909 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 Q904 TRANS PNP KTA2014 USM 870 100 0018 CF1 FILTER CER LT 455FW 455KHZ 310 101 0010 Q905 TRANS PNP KTA2
19. 0408 100K 0 001 0 001 0 001 0 001 PROG_MODE 15 KIA7042 PROG_1 C439 2 X401 3 F m 12V_IN 18 lu 435 DUT IN 2 15 6443 li gt DM 55 770 010 0029 PLT rd aag AutoCAD R13c4 10 20 98 SD 125 DIGITAL SCHEMATIC DIAGRAM SIZE B PAGE 44 October 98 5 4 2 1 REVISIONS REV DESCRIPTION A RELEASED TO MANUFACTURING JW 10 98 470P
20. 0603 CAP CER 0 001UF 10 50V X7R 0603 CAP CER 0 001UF 10 50V X7R 0603 CAP 22UF 20 35V 7343 CER 0 001UF 10 50V X7R 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 CAP CER 0 01UF 10 25V X7R 0603 CER 0 001UF 10 50V X7R 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 TA 4 7UF 20 10V A TA 4 7UF 20 10V A TA 4 7UF 20 10V A TA 4 7UF 20 10V A CAP CER 47PF 5 50V COG 0603 CAP CER 47PF 5 50V COG 0603 CAP TA 10UF 20 6 3V 3216 A CAP TA 1UF 20 25V 3216 MAXON SD 125 RF LINK MODULE DESCRIPTION PART PART REF 100 803 2105 C463 100 621 1102 C464 100 621 1223 C465 100 813 1104 C466 100 520 1470 C801 100 621 1223 C802 100 813 1104 C803 100 520 1470 C804 100 813 1473 C805 100 621 1562 C806 100 521 1272 C807 100 621 1472 C808 100 621 1151 C810 100 621 1392 C811 100 520 1470 C812 100 813 1104 C813 100 813 1104 C815 100 813 1104 CON401 100 813 1473 CON403 100 621 1471 D401 102 013 0106 D402 100 813 1473 D403 102 013 3107 D404 102 033 5476 D405 100 621 1102 D406 100 621 1102 D407 100 621 1102 D408 100 621 1102 D409 100 621 1102 D410 100 621 1102 D801 102 023 0475 D802 100 813 1104 L801 100 520 1390 L802 100 520 1390 Q401 102 053 0105 Q402 102 013 0106 Q403 100 621 1102 Q404 100 621 1102 Q405 100 621 1102 Q406 100 621 1102 Q407 100 621 1102 Q408 100 621 1102 Q801 102 063 3226 Q802 100 621 1102 R403 100 813 1104 R404 100 611 1103 R406 100 621 1102 R407 100 8
21. 1 16W 200 0603 741 102 1331 R111 RES TF 10K 5 1 16W 200 0603 741 102 1103 R112 RES TF 22K 5 1 16W 200 0603 741 102 1223 R115 RES TF 47K 5 1 16W 200 0603 741 102 1473 R116 RES TF 0 5 1 16W 200 0603 741 102 1000 R118 RES TF 680 5 1 16W 200 0603 741 102 1681 R124 RES TF 100 5 1 16W 200 0603 741 102 1101 R125 RES TF 22 5 1 16W 200 0603 741 102 1220 R129 C56 RES 0 5 1 16W 200 0603 741 102 1000 R901 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 R902 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 R903 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 R904 RES TF 7 5K 5 1 16W 200 0603 741 102 1752 R905 RES TF 27K 5 1 16W 200 0603 741 102 1273 R906 RES TF 7 5K 5 1 16W 200 0603 741 102 1752 R907 RES TF 27K 5 1 16W 200 0603 741 102 1273 R908 RES TF 47 5 1 16W 200 0603 741 102 1470 R909 RES TF 470 5 1 16W 200 0603 741 102 1471 RV1 POT VRES 10K 25 TOP ADJ 901 120 0103 RV2 POT VRES 100K 25 TOP ADJ 901 120 0104 RV3 POT VRES 47K 25 TOP ADJ 901 120 0473 RV6 POT VRES 10K 25 TOP ADJ 901 120 0103 T1 COIL VAR 455KHZ QUAD IFT SMD 353 012 0001 T2 XFMR B4F FREQ MIXER 617PT 1019 SMT 840 010 0002 T3 XFMR B4F FREQ MIXER 617PT 1019 SMT 840 010 0002 x1 XTAL 44 645M 30 15PM 32P RX 3RD HC 45 168 044 6450 XF1 FILTER XTAL KFN1045AA 45 1M 310 030 0015 PAGE 35 October 98 MAXON SD 125 RF LINK MODULE Intentionally Left Blank PAGE 36 October 98 MAXON SD
22. 1103 100 520 1300 100 621 1102 102 013 0106 102 013 0106 100 621 1102 100 621 1471 102 053 0105 100 621 1471 100 520 1470 100 520 1330 100 520 1200 100 611 1103 100 611 1103 100 611 2104 100 611 2104 100 611 1103 100 611 1103 102 023 0475 081 032 3106 100 621 1102 100 813 1104 100 621 1471 100 611 1103 100 611 1103 100 611 1103 100 520 1680 100 520 1221 100 611 1103 MAXON SD 125 RF LINK MODULE REF DESCRIPTION PART REF DESCRIPTION PART C909 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 Q904 TRANS NPN KTC4075 UMT3 870 200 0031 CF1 FILTER CER LT 455FW 455KHZ 310 101 0010 Q905 TRANS NPN KTC4075 UMT3 870 200 0031 CF2 FILTER CER CF455HT 455KHZ 310 010 0013 R1 RES TF 10K 5 1 16W 200 0603 741 102 1103 CON1 CONN SKT 18P DIP 2 0MMST SMT 140 020 0056 R2 RES TF 100K 5 1 16W 200 0603 741 102 1104 D5 DIODE PIN UPP9401 T amp R S0V 2 5W 220 020 0001 R3 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 D6 DIODE PIN UPP9401 T amp R S0V 2 5W 220 020 0001 R4 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 09 DIODE SCHOTTKY CHIP HSMS 2817 L31 220 040 0009 R5 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 012 DIODE SW KDS193 SOT 23 220 010 0003 R6 RES TF 2K 5 1 16W 200 0603 741 102 1202 D13 DIODE SW KDS181S SOT 23 220 010 0004 R7 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 014 DIODE SW KDS181S SOT 23 220 010 0004 R8 RES TF 910 5 1 10W 1TC250 0805 741 117 2911 D903 DIODE SW KDS226 SOT 23 220 010 0005 R11 R
23. 125 RF LINK MODULE for open and close squelch mute LED will be OFF amp unmute LED will be ON 9 NOTE The difference of RF signal strength between the unmute and mute levels must be greater than or at least equal to 0 15mV 1 at least 123 5dBm for the squelch setting to work properly If they are too close to one another RSSI through the A D conversion can not differentiate between the mute and unmute level properly As a result it would cause the CD Carrier Detect to act intermittently PAGE 16 October 98 MAXON SD 125 RF LINK MODULE WATT METER 20dB d O DC POWER SUPPLY RADIO 3K Dev 1K 25 kHz Channel Spacing 1 5K Dev 1K 12 5 kHz Channel Spacing DC POWER SUPPLY RADIO 1 5 5 6 1kHz Audio 3 kHz Deviation 25 kHz Channel Spacing 1 5 kHz Deviation 12 5 kHz Channel Spacing 2 AF Generator 10mV amp 20dB Up PAGE 17 October 98 MAXON SD 125 RF LINK MODULE 1203 1303 RF BOARD DIGITAL BOARD ALIGNMENT POINTS ALIGNMENT POINTS CHANNEL NO SWITCH POSITION 401 CHANNEL SELECT SWITCH PAGE 18 October 98 Surface Mount Componen
24. 16W 200 0603 741 102 1472 R905 RES TF 27K 5 1 16W 200 0603 741 102 1273 R907 RES TF 27K 5 1 16W 200 0603 741 102 1273 R908 RES TF 47 5 1 16W 200 0603 741 102 1470 R909 RES TF 470 5 1 16W 200 0603 741 102 1471 RV1 POT VRES 10K 25 TOP ADJ 901 120 0103 RV2 POT VRES 100K 25 TOP ADJ 901 120 0104 RV3 POT VRES 47K 25 TOP ADJ 901 120 0473 RV6 POT VRES 10K 25 ADJ 901 120 0103 T1 COIL VAR 455KHZ QUAD IFT SMD 353 012 0001 T2 XFMR FREQ MIXER 617PT 1019 SMT 840 010 0002 T3 XFMR B4F FREQ MIXER 617PT 1019 SMT 840 010 0002 1 XTAL 44 645M 30 15PM 32P RX 3RD HC 45 168 044 6450 XF1 FILTER XTAL KFN1045AA 45 1M 310 030 0015 PAGE 32 October 98 MAXON SD 125 RF LINK MODULE REF DESCRIPTION PART REF DESCRIPTION PART C63 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 REPLACEMENT MODULES C64 CAP CER 470PF 10 50V X7R 0603 100 621 1471 FRONT END ASSEMBLY SEE NOTE 1 650 110 0012 C65 CAP TA 10UF 20 10V B 3528 102 023 1106 POWER AMP ASSEMBLY SEE NOTE 1 650 230 0012 C66 CAP CER 470PF 10 50V X7R 0603 100 621 1471 VCO ASSEMBLY SEE NOTE 1 650 030 0025 C67 CAP CER 470PF 10 50V X7R 0603 100 621 1471 TCXO SEE NOTE 1 650 100 0002 C68 CAP CER 0 001UF 10 50V X7R 0805 100 621 2102 C72 CAP CER 9PF 0 25PF 50V COG 0805 100 020 2090 c1 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C73 CAP CER 30PF 5 50V COG 0805 100 520 2300 2 CAP TA 10UF 20 6 3V 3216 A 102 013 0106
25. 200 0031 R74 RES TF 22K 5 1 16W 200 0603 741 102 1223 R L2 RES TF 0 5 1 10W 250 0805 741 117 2000 R75 RES TF 47K 5 1 16W 200 0603 741 102 1473 R1 RES TF 10K 5 1 16W 200 0603 741 102 1103 PAGE 34 October 98 MAXON SD 125 RF LINK MODULE REF DESCRIPTION PART R76 RES TF 10K 5 1 16W 200 0603 741 102 1103 R77 RES TF 1 2K 5 1 16W 200 0603 741 102 1122 R78 RES TF 22K 5 1 16W 200 0603 741 102 1223 R79 RES TF 10 5 1 16W 200 0603 741 102 1100 R82 RES TF 33K 5 1 16W 200 0603 741 102 1333 R83 RES TF 20K 5 1 16W 200 0603 741 102 1203 R90 RES TF 300 5 1 16W 200 0603 741 102 1301 R91 RES TF 300 5 1 16W 200 0603 741 102 1301 R92 RES TF 4 7M 596 1 16W 200 0603 741 102 1475 R94 RES TF 1K 5 1 16W 200 0603 741 102 1102 R95 RES TF 82K 5 1 16W 200 0603 741 102 1823 R96 RES TF 39K 5 1 16W 200 0603 741 102 1393 R97 RES TF 100 5 1 16W 200 0603 741 102 1101 R98 RES TF 10K 5 1 16W 200 0603 741 102 1103 R99 RES TF 100K 1 1 16W 0603 740 211 1003 R100 RES TF 68K 1 1 16W 100 0603 740 211 1683 R102 RES TF 22K 5 1 16W 200 0603 741 102 1223 R103 RES TF 10K 5 1 16W 200 0603 741 102 1103 R104 RES TF 10K 5 1 16W 200 0603 741 102 1103 R105 RES TF 22K 5 1 16W 200 0603 741 102 1223 R106 RES TF 22K 5 1 16W 200 0603 741 102 1223 R108 RES TF 56K 5 1 16W 200 0603 741 102 1563 R109 RES TF 0 1 1 1W 100 0603 740 521 0R10 R110 RES TF 330 5
26. 23 SW ND TRANS PNP KRA104S SOT 23 SW PD TRANS NPN KRC104SND SOT 23 SW ND TRANS PNP KTA1504 Y SOT 23 SW TRANS NPN KRC104SND SOT 23 SW ND TRANS SI4412DY SO 8 MOSFET N CH TRANS SI4412DY SO 8 MOSFET N CH RES TF 10K 5 1 16W 200 0603 RES TF 47K 5 1 16W 200 0603 RES TF 22K 5 1 16W 200 0603 RES TF 10K 5 1 16W 200 0603 RES TF 100K 5 1 16W 200 0603 RES TF 220K 5 1 16W 200 0603 RES TF 100K 5 1 16W 200 0603 RES TF 3 3K 5 1 16W 200 0603 RES TF 180K 5 1 16W 200 0603 RES TF 100K 5 1 16W 200 0603 RES TF 10K 5 1 16W 200 0603 RES TF 10K 5 1 16W 200 0603 RES TF 10K 5 1 16W 200 0603 100 813 1104 100 813 1104 100 621 1332 100 521 1272 100 520 1510 100 813 1104 100 520 1331 100 520 1510 100 520 1101 100 520 1101 102 063 3226 100 813 1104 100 611 1103 102 033 3107 100 520 1101 102 023 0475 102 033 3107 140 081 0015 140 020 0056 221 020 0056 221 020 0056 221 020 0056 221 020 0056 221 020 0056 220 010 0003 221 020 0056 221 020 0056 221 020 0056 221 020 0056 220 010 0017 220 040 0012 355 010 0120 355 010 0335 870 010 0005 870 010 0005 870 010 0005 870 020 0001 870 010 0005 870 020 0001 870 100 0004 870 020 0001 870 070 0006 870 070 0006 741 102 1103 741 102 1473 741 102 1223 741 102 1103 741 102 1104 741 102 1224 741 102 1104 741 102 1332 741 102 1184 741 102 1104 741 102 1103 741 102 1103 741 102 1103 MAXON SD 125 RF LINK MODU
27. 2UH pom 2 2K KRC104S R55 rer R92 LIBRARIES SD125R11 LIB T ND 2 7K PADS FILE 200029 0 C 1 VCO RX SECTIION i gu 4 1 012 R64 d BFR92A 22 58 1 P2 Z T MIXER 4 001 NOTES 470P d T2 C87 paee aana 1 C42 1 1 per 0 001 1 1 UNLESS OTHERWISE SPECIFIED 0 001 R91 R90 RE 1 R21 300 300 100 1 1 5 gn 1 1 43PF N F n 55 FRONT END SCHEMATIC 1 1 1 470NH _ m 1 2 770 110 0012 116 150nH m T N F aa 9 N F 1 1 4 4 A amc ata Norns ee ee ka v R119 ai c92 c93 24P 82P vec CON N F RE 1 Me arz R909 GND 164 C166 470 Y DATA 3 E R908 7 rH 71 2906 47 LOCK DT 4 N F N F N F C94 7 5K 6967 EN 45 Kos 3 781 RIS CA oo CLOCK jg 12K 100 ed R907 MOD L L36 c96 27K 5 SW N F 8 133 173 07 0 01 Jt TEKO N F N F R3 2 2K KTA1504S R14 gt 0905 162 KTc3azss 857 2 7K AUDIO dio N F R4 m tas 0904 9904 KTC4075 KTC407 2 1 8K m3 809226 04075 IX d 12 IC2 2K To t RX dis R7 1 8K Qu T N F RSSI m EK 755 2 7K lt M ie 5 R125 veo 5 ay SS y dis 9 R124 15045 C906
28. 470MHz UNLESS OTHERWISE SPECIFIED 770 230 00 1 6 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPECIFIED PAGE 51 October 98 BIEEIEEREERSE DEN NUN a m lE f B 29 d 79 m Digital Board Assembly 416078A Digital Board Assembly 416078A 650 010 0029 650 010 0029 PAGE 52 October 98 J 83 4 7 tec sada v E 4 K in J L L by ka L Olo ele c aye OU 4 Re RF Board Assembly 416074A Rev 06 148 174MHz 650 020 0029 RF Board Assembly 416074A Rev 06 148 174MHz 650 020 0029 PAGE 53 October 98 peL Dg npe pial yA 25 Bron 4 O E gt Tiare 0 90 JUL C 294 7 gt 21611600 C 6 7 e 0642 906 3 TN Tel RF Board Assembly 416074A Rev 06 RF Board Assembly 416074A Rev 06 650 020 0027 400 430MHz 650 020 0027 400 430MHz 650 020 0026 440 470MHz 650 020 0026 440 470MHz PAGE 54 October 98 REPAIRABLE REPLACEABLE PARTS LIST
29. 470PF 10 50V X7R 0603 100 621 1471 C79 CAP CER 0 1UF 10 25V X7R 0805 100 611 2104 C11 CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C80 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C12 CAP TA 10UF 20 6 3V 3216 A 102 013 0106 C81 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C13 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C82 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C14 CAP CER 470PF 1096 50V X7R 0603 100 621 1471 C83 CAP CER 7PF 0 5PF 50V COG 0603 100 120 1070 C15 CAP CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C84 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C16 CAP CER 2PF 0 25PF 50V COG 0603 100 020 1020 C87 CAP CER 22PF 596 50V COG 0603 100 520 1220 C17 CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C87 CAP CER 9PF 0 5PF 50V COG 0603 100 120 1090 C18 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C88 CAP CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C19 CER 220PF 596 50V COG 0603 100 520 1221 C90 CAP CER 7PF 0 5PF 50V COG 0603 100 120 1070 C21 CAP METAL POLY 0 33UF 63V BOX 083 013 2334 C92 CAP CER 24PF 596 50V COG 0603 100 520 1240 C22 CAP METAL POLY 0 022UF 10 63V BOX 083 013 2223 C93 CAP CER 82PF 596 50V COG 0603 100 520 1820 C23 CAP METAL POLY 0 01UF 10 63V KBOX 083 014 2103 C94 CAP CER 1UF 80 2096 16V Y5V 0805 100 803 2105 C24 CAP METAL POLY 0 01UF 10 63V KBOX 083 014 2103 C96 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C25 CAP CER 1UF 80 2096 16V Y5V 0805 100 803 2105 C97 CAP CER 30PF 596 50V COG 0
30. 741 102 1121 Q17 TRANS 900MHZ AMP MMBR951 SOT 23 870 200 0026 R57 RES TF 100K 1 1 16W 0603 740 211 1003 Q18 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R58 RES TF 470K 5 1 16W 200 0603 741 102 1474 Q19 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R59 RES TF 39 596 1 16W 200 0603 741 102 1390 Q21 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R61 RES TF 68K 1 1 16W 100 0603 740 211 1683 Q22 TRANS PNP KTA1663 Y SOT 89 HC SW H Y 870 150 0002 R64 RES TF 22 596 1 16W 200 0603 741 102 1220 Q25 TRANS NPN BFR92A SOT 23 870 200 0020 R65 RES TF 51 596 1 16W 200 0603 741 102 1510 Q31 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R66 RES TF 100 596 1 16W 200 0603 741 102 1101 Q32 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R68 RES TF 680K 596 1 16W 200 0603 741 102 1684 Q34 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R69 RES TF 470K 596 1 16W 200 0603 741 102 1474 Q901 TRANS PNP KTA2014 USM 870 100 0018 R70 RES TF 470K 5 1 16W 200 0603 741 102 1474 Q902 TRANS NPN KTC4075 UMT3 870 200 0031 R71 RES TF 1K 5 1 16W 200 0603 741 102 1102 PAGE 31 October 98 MAXON SD 125 RF LINK MODULE REF DESCRIPTION PART R72 RES TF 470K 5 1 16W 200 0603 741 102 1474 R74 RES TF 22K 5 1 16W 200 0603 741 102 1223 R76 RES 10 590 1 16W 200 0603 741 102 1103 R77 RES TF 1 2K 5 1 16W 200 0603 741 102 1122 R78 RES TF 22K 5 1 16W 200 0603 741 102 1223 R79 RES TF 10 5 1 16W 20
31. 741 102 1122 L15 COIL CHIP 0 15UH 5 NL252018T R15J 371 004 3R15 R41 RES TF 100 5 1 16W 200 0603 741 102 1101 L18 CHIP 1UH 5 NL252018T 1ROJ 371 017 3102 R42 RES TF 12K 5 1 16W 200 0603 741 102 1123 L19 COIL CHIP 10UH CYLNDRCL 10 1206 371 005 3103 R43 RES TF 10K 5 1 16W 200 0603 741 102 1103 Q2 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R45 RES TF 12K 5 1 16W 200 0603 741 102 1123 Q3 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R46 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 Q4 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R47 RES TF 2 2 5 1 10W TC250 0805 741 117 2229 Q5 TRANS PNP KRA104S SOT 23 SW PD 870 010 0005 R48 RES TF 2 2 5 1 10W TC250 0805 741 117 2229 Q6 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R49 RES TF 0 5 1 16W 200 0603 741 102 1000 Q7 TRANS PNP KTA1504 Y SOT 23 SW 870 100 0004 R50 RES TF 1M 596 1 16W 200 0603 741 102 1105 Q8 TRANS PNP KTA1504 Y SOT 23 SW 870 100 0004 R51 RES TF 2 2 5 1 10W TC250 0805 741 117 2229 Q11 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R52 RES TF 3 3K 5 1 16W 200 0603 741 102 1332 Q12 TRANS NPN BFR92A SOT 23 870 200 0020 R53 RES TF 10K 5 1 16W 200 0603 741 102 1103 Q13 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R54 RES TF 1K 5 1 16W 200 0603 741 102 1102 Q14 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R55 RES TF 1 5K 5 1 16W 200 0603 741 102 1152 Q16 TRANS NPN BFR92A SOT 23 870 200 0020 R56 RES TF 120 5 1 16 200 0603
32. BL SOT 23 870 200 0006 R54 RES TF 1K 5 1 16W 200 0603 741 102 1102 916 TRANS 900MHZ AMP MMBR951 SOT 23 870 200 0026 R55 RES TF 2 7K 5 1 16W 200 0603 741 102 1272 Q17 TRANS 900MHZ AMP MMBR951 SOT 23 870 200 0026 R56 RES TF 270 5 1 16W 200 0603 741 102 1271 918 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R57 RES TF 100K 1 1 16W 0603 740 211 1003 Q19 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R58 RES TF 470K 596 1 16W 200 0603 741 102 1474 Q21 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R59 RES TF 39 5 1 16W 200 0603 741 102 1390 Q22 TRANS PNP KTA1663 Y SOT 89 HC SW H Y 870 150 0002 R61 RES 68 196 1 16W 100 0603 740 211 1683 Q25 TRANS NPN BFR92A SOT 23 870 200 0020 R64 RES TF 22 5 1 16W 200 0603 741 102 1220 Q31 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R65 RES TF 51 5 1 16W 200 0603 741 102 1510 Q32 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R66 RES TF 100 5 1 16W 200 0603 741 102 1101 Q34 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R68 RES TF 680K 5 1 16W 200 0603 741 102 1684 9901 TRANS NPN KTC4075 UMT3 870 200 0031 R69 RES TF 470K 5 1 16W 200 0603 741 102 1474 Q902 TRANS PNP KTA2014 USM 870 100 0018 R70 RES TF 470K 596 1 16W 200 0603 741 102 1474 Q903 TRANS NPN KTC4075 UMT3 870 200 0031 R71 RES TF 1K 596 1 16W 200 0603 741 102 1102 Q904 TRANS NPN KTC4075 UMT3 870 200 0031 R72 RES TF 470K 596 1 16W 200 0603 741 102 1474 Q905 TRANS NPN KTC4075 UMT3 870
33. BOARD Removing the RF Board Assembly 1 Remove the Upper Cover refer to Removing amp Replacing the Upper Cover 2 Remove the Digital Board Assembly and Shield Plate refer to Removing amp Replacing the Digital Board Assembly amp Shield Plate 3 Unscrew the 4 mounting standoffs 4 Unsolder the antenna connector cable 5 Remove the RF Board Assembly To replace the RF Board Assembly 1 Reverse the steps taken to remove the RF Board Assembly Figure 4 RF Board Removal PAGE 13 October 98 MAXON SD 125 RF LINK MODULE PROGRAMMING The SD 125 Series radio requires the ACC 900 Programming Software ACC 2000 Interface Module 9 15 VDC 200mA Power Supply and QPA 4000 Programmer Interface Cable Refer to the ACC 900 Programming Manual P N 680 110 0032 for detailed information on programming the SD 125 Series radio ALIGNMENT PROCEDURE The SD 125 UHF VHF Receiver is by design broad band covering UHF 400 430 MHz amp 440 470 MHz and VHF 148 174 MHz and should require no special alignment unless repairs are performed on the receiver portion Should repairs be necessary use the Test Equipment Diagram on page 17 amp the Alignment Points Diagram on page 18 in conjunction with the following procedures 9 An Extender Board P N 650 060 0016 is required in order to separate the Digital and RF PCB s to allow access to the alignment points Installation instructions are
34. R15 RES TF 100 5 1 16W 200 0603 741 102 1101 2 PLL MC145191FR2 SO 20 RS 440 440 050 0011 R16 RES 910 5 1 10 250 0805 741 117 2911 AMP LM358MX SO 8 DUAL 441 030 0006 R17 RES TF 12K 5 1 16W 200 0603 741 102 1123 5 RCVR MC3371D SO 16 NWRBAND 441 060 0007 R21 RES TF 100 5 1 16W 200 0603 741 102 1101 1 7 IC OP AMP LM358MX SO 8 DUAL 441 030 0006 R22 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 1 8 IC OP AMP DUAL TLO62CDR SO 8 441 030 0012 R23 RES TF 120 5 1 16W 200 0603 741 102 1121 L1 COIL CHIP 47NH 20 LL2012 F47NM 371 010 5470 R24 RES TF 5 6K 5 1 16W 200 0603 741 102 1562 L3 COIL CHIP 1 2UH 5 NL252018T 1R2J 371 004 31R2 R25 RES TF 3 3K 5 1 16W 200 0603 741 102 1332 L4 COIL CHIP 0 1UH NL252018T R10J 371 804 3R10 R26 RES TF 18 5 1 16W 200 0603 741 102 1180 L5 COIL CHIP 0 1UH NL252018T R10J 371 804 3R10 R27 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 L6 COIL CHIP 1UH 5 NL252018T 1ROJ 371 017 3102 R28 RES TF 56 5 1 16W 200 0603 741 102 1560 L7 COIL SPRG 3X0 55X4T L SMD 350 000 0104 R31 RES TF 300 5 1 16W 200 0603 741 102 1301 L8 COIL SPRG 3X0 55X5T L SMD 350 000 0105 R32 RES TF 300 5 1 16W 200 0603 741 102 1301 L11 COIL SPRG 3X0 55X5T L SMD 350 000 0105 R33 RES TF 3 3K 5 1 16W 200 0603 741 102 1332 L12 COIL CHIP 1 2UH 5 NL252018T 1R2J 371 004 31R2 R34 C87 RES TF 18 5 1 16W 200 0603 741 102 1180 L13 COIL SPRG 2 8X0 4X8
35. R488 R494 jr tine R4s 12 196 10K 100K 10 LM324 14 1802 5 rra 3 3uH R432 T 47K 68K C456 LKS C462 ccn C KRC104S R431 NF 100uF 16V RASA Rso2 R806 4 4 5 R416 R415 C409 Fr 3 k 10K R418 R417 R 10K 10K 0 047 47K 9 10K 10K R419 3 7 1 le R805 T U40588 T 641 1 68K K C415 10 C413 LM324 1 mE cieo 0808 47p 0 047 50805 z 152 1 R489 C4le U404A 3 478 MC14066BD 4 le vB RV403 10K CON403 vec R438 22k 0406 KRALO4S vec m mee KRC104S p a 804 033 GND 5 0802 1801 DATA 14 R455 1 pt 1 PLL LOCK M gt U407 MBRS140T3 PLL ENB LM386N C813 PLL ae oor B MOD INPUT vec 0407 4 5045 CET SELECT R439 9 2 IN R490 9 47 1 8 10 MOD INVERT hi h LOL 3 ua T gt 5 e 10 470 10u R456 KER TBS VI BPE 4 p 470 47u V ama 9 M N C N C JF mid Tx T BUS LTCIA35CS Tx 8 0402 R469 99470 9440 5 S E NN 56V 100K Tau 1 5 GN 5 5 68k ook 10 258 UT FNS EE RX ENB R472 C N H B D E pave AA KRC104S R475 120K 4 4 100 R471 1 R461 RV404 t 1
36. R82J 371 804 3R82 R31 RES TF 300 5 1 16W 200 0603 741 102 1301 L7 COIL SPRG 2X0 75X3T L SMD 350 000 0103 R32 RES TF 300 5 1 16W 200 0603 741 102 1301 L8 COIL SPRG 2X0 75X3T L SMD 350 000 0103 R33 RES TF 6 8K 5 1 16W 200 0603 741 102 1682 L11 COIL SPRG 2X0 75X3T L SMD 350 000 0103 R34 RES TF 18 5 1 16W 200 0603 741 102 1180 L12 COIL CHIP 1 2UH 5 NL252018T 1R2J 371 004 31R2 R35 RES TF 5 6K 5 1 16W 200 0603 741 102 1562 L13 COIL SPRG 1 0X0 35X7T R 350 000 0095 R36 RES TF 0 5 1 16W 200 0603 741 102 1000 L14 COIL CHIP 0 47UH NL252018T R47J 371 804 3R47 R37 RES TF 1 2K 5 1 16W 200 0603 741 102 1122 L15 COIL CHIP 0 15UH 5 NL252018T R15J 371 004 3R15 R41 RES TF 100 5 1 16W 200 0603 741 102 1101 L18 COIL CHIP 1UH 5 NL252018T 1ROJ 371 017 3102 R42 RES TF 12K 5 1 16W 200 0603 741 102 1123 L19 COIL CHIP 10UH CYLNDRCL 10 1206 371 005 3103 R43 RES TF 10K 5 1 16W 200 0603 741 102 1103 Q2 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R45 RES TF 12K 5 1 16W 200 0603 741 102 1123 Q3 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R46 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 Q4 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R47 RES TF 2 2 5 1 10W TC250 0805 741 117 2229 Q5 TRANS PNP KRA104S SOT 23 SW PD 870 010 0005 R48 RES TF 2 2 5 1 10W TC250 0805 741 117 2229 Q6 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R49 RES TF 0 5 1 16W 200 0603 741 102 1000 Q7 TRANS PNP KTA1504
37. SCHEMATIC 13 47 EIS Im gt 1 RX_EN T PANG COSTI ri 1 E M G 5 RB 6 aR CIS i T C21 C22 C23 cs 2 9 1 0 umen bo 0 01 Es MC145191F 0 33UF 0 0220 0 01U MC3371 EOD MC di E MUR peed POLY V L D D c2 c3 d 9 as 6155 9 R117 470P 10 6 3 470P GND M MOD C U U N F N F 9184 T 2 0 C 1 P P D ici T LLL n 7 8 T L18 H P 11450 R129 ig 0 R94 THO r gg Z 82 1K x1 33P tow R126 1 100K 44 645M AA de 95 N F R97 C121 82K C10 1 18 1 100 pun 20p L b 4 4 14 gt 1 3 C124 C125 1 N F N F T T T 3210796 C152 4 TLOG2 C122 C123 k R98 001 0 01 1 R1287 R132 R106 22K T 1 1 C129 gioi R107 N F S RV5 NF A 4 N F 4 5 127 10 16 n 0 01 A 7 1 0 01 N F R108 770 020 0027 R103 R105 D14 56K AutoCAD R1304 L web C128 10K5 R104 CF1 22K L 10 20 98 470P 4 7 10 BE 10K 455F KDS181S 5 9 1 ie maxen 470 470P R102 015 aes R83 ICBR 470 22 5 1815 C131 2 A World of Communications 20K TLO62 0 001 455 052 80 125 KRC104 RF SCHEMATIC DIAGRAM R112 U1 400 430MHz I 22K 770 020 0027
38. c74 CAP CER 36PF 5 50V COG 0805 100 520 2360 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C75 CAP CER 22PF 5 50V COG 0805 100 520 2220 C4 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C76 CER 6 8PF 0 5PF 50V COG 0805 100 120 26R8 c5 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C77 CAP CER 0 001UF 10 50V X7R 0805 100 621 2102 C6 CAP 4 70 20 10 102 023 0475 c78 CAP CER 470PF 10 50V X7R 0603 100 621 1471 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C79 CAP CER 0 1UF 10 25V X7R 0805 100 611 2104 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C80 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C9 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C81 CAP CER 470PF 10 50V X7R 0603 100 621 1471 c11 CAP CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 c82 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C12 CAP 100 20 6 3 3216 102 013 0106 C83 CAP CER 7PF 0 5PF 50V COG 0603 100 120 1070 C13 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C84 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C14 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C88 CAP CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C15 CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C90 CAP CER 7PF 0 5PF 50V COG 0603 100 120 1070 C16 CAP CER 2PF 0 25PF 50V COG 0603 100 020 1020 C92 CER 24PF 5 50V COG 0603 100 520 1240 C17 CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C93 CAP CER 82PF 5 50V COG 0603 100 520 1820 C18 CAP CER 0 001U
39. i L16 GND L TPI 9 1 4 n i R119 4 C69 L12 C92 c93 115 R908 T N F 1 2UH 24P 82P 150nH 47 C907 FT MF NAA T R133 T NAF T T 470 0 01 C164 ci66 C171 C909 R906 It IL 0 01 R901 7 5K C163 IV x M E 7 5K U U C96 N F N F N F N F C174 u ae 61 T 2 2K Q28 2 F T 0905 KTC4075 905 CON1 N F C165 N F 12K 100 KDS226 R902 R905 R907 VCC 1 NA C24 C904 22 AS 90 d2 133 134 C168 135 C173 156 07 L0 01U 0 01 DATA d N N F R3 2 2K 15045 T E 26 R14 Lock DT 44 C162 R124 KTC3875S 0902 199 C16 y 2005 0501 nal Bk 2 78 0904 2014 0904 0905 7 T 2P s 2 R5 1 8K R12 C901 KDS226 R903 KTC4075 KTC4075 cock de DT 4 m 18 2 sels R6 2K 5 6K pe nee TH2 0 01 C902 MOD 14 CLOCK R T N F N F 0 01 N S SW vA RZ 2 7K n 8 16 oya BAL TBK ES 0903 coat 49 B OUT ly KTA4075 220PF AUDIO 17 15045 TX EN i 1 14 z 0 1 SS R125 MEME VOD REND 47 SCHEMATIC PK 131 152 mB EN d i 12 tst 9 e b 2 n ob RSSI ulan C18 M M S R116 M i cm az C21 622 C23 cs 9 5 0 L S dis ES EEE 0 33UF 0 0220 0 010
40. iL EN 7P KE tart lane TO 16042 4T 25 5084 C609 C601 18 10 0601 2 14 C624 C612 KDS226 Leos C607 L602 i 4P 470P 16P NOTES 1 ALL VALUES ARE IN OHMS MICROHENRIES OR MICROFARADS UNLESS OTHERWISE SPECIFIED 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPECIFIED PAGE 50 October 98 FRONT END 440 470MHz 770 110 0013 7 8 R601 56K C621 C619 C618 C616 C615 C613 C610 C608 C606 C605 C603 C602 14 6 11 15P R602 33P 14P 10P 7P 11 100 031 123 H19H2H2938H2H9H H eit 15042 4T 25 5084 C622 C609 C601 24P 47 11 5 5 0601 46 3 L606 C614 G624 C612 KDS226 21603 C607 L602 C604 L601 470P 4T 14 20 4T GND GND C623 1607 C620 C617 L605 20P 4T 14 14 4 Njai T NOTES 1 ALL VALUES ARE IN OHMS MICROHENRIES OR MICROFARADS UNLESS OTHERWISE SPECIFIED 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPECIFIED ote Schematics are for reference only Based on band selection reference designators and part values may differ from schematics shown FRONT END 400 430MHz 770 110 0019
41. nose pliers 2 Alternately heat the metalized terminal ends of the surface mount component with the soldering iron If a hot air system is used direct the heat to the terminals of the component Use extreme care with the soldering equipment to prevent damage to the printed circuit board PCB and the surrounding components 3 When the solder on all terminals is liquefied gently remove the component Excessive force may cause the PCB pads to separate from the board if all solder is not completely liquefied 4 t may be necessary to remove excess solder using a vacuum de soldering tool or Solder wick Again use great care when de soldering or soldering on the printed circuit boards It may also be necessary to remove the epoxy adhesive that was under the MAXON SD 125 RF LINK MODULE surface mount component and any flux on the printed circuit board Surface Mount Component Replacement 1 Tin one terminal end of the new component and the corresponding pad of the PCB Use as little solder as possible 2 Place the component on the PCB pads observing proper polarity for capacitors diodes transistors etc 3 Simultaneously touch the tinned terminal end and the tinned pad with the soldering iron Slightly press the component down on the board as the solder liquefies Solder all terminals allowing the component time to cool between each application of heat Do not apply heat for an excessive length of time and
42. to 20 dB from standard level 3 Monitor the demodulated signal from service monitor Adjust RV3 to make the monitored signal to be a balanced square wave 4 Reduce input signal to the standard level and adjust for the standard deviation APC 1 Adjust RV1 for High Power 5W 2 Adjust RV6 for Low Power 1W 3 This completes the transmitter alignment procedures SD 125 Squelch setting using the ACC 2000 Interface Module Maxon s wide range of data radio products since the crystal control module DM 0500 series had their squelch level setting by hardware touch up With the new SD 125 series the squelch level to open or close unmute or mute is set up by software control The RSSI utilizes the A D conversion that will be fed to the microprocessor which in turn will use this input to determine the squelch level setting to control the mute and unmute of the receiver Default setting of squelch level for all the SD 125 from our manufacture and workshop is approximately set at MAXON SD 125 RF LINK MODULE 1 Squelch open unmute at 114dBm to 113dBm 0 45 0 5mV of the RX signal strength 2 Squelch close mute at 117dBm to 116dBm 0 3 0 35mV of the RX signal strength Changing the default squelch settings requires use of the programming adaptor box This box is designed for use not only as part ofthe programming kit but also as a tool of squelch level setting The minimum equipment required for sque
43. 0 0603 741 102 1100 R82 RES TF 33K 5 1 16W 200 0603 741 102 1333 R83 RES TF 20K 5 1 16W 200 0603 741 102 1203 R92 RES TF 4 7M 596 1 16W 200 0603 741 102 1475 R94 RES TF 1K 5 1 16W 200 0603 741 102 1102 R95 RES TF 82K 5 1 16W 200 0603 741 102 1823 R96 RES TF 39K 5 1 16W 200 0603 741 102 1393 R97 RES TF 100 5 1 16W 200 0603 741 102 1101 R98 RES TF 10K 5 1 16W 200 0603 741 102 1103 R99 RES TF 100K 1 1 16W 0603 740 211 1003 R100 RES TF 68K 1 1 16W 100 0603 740 211 1683 R102 RES TF 22K 5 1 16W 200 0603 741 102 1223 R103 RES TF 10K 5 1 16W 200 0603 741 102 1103 R104 RES TF 10K 5 1 16W 200 0603 741 102 1103 R105 RES TF 22K 5 1 16W 200 0603 741 102 1223 R106 RES TF 22K 5 1 16W 200 0603 741 102 1223 R108 RES TF 56K 5 1 16W 200 0603 741 102 1563 R109 RES TF 0 1 1 1W 100 0603 740 521 0R10 R110 RES TF 330 5 1 16W 200 0603 741 102 1331 R111 RES TF 10K 5 1 16W 200 0603 741 102 1103 R112 RES TF 22K 5 1 16W 200 0603 741 102 1223 R115 RES TF 47K 5 1 16W 200 0603 741 102 1473 R116 RES 0 5 1 16W 200 0603 741 102 1000 R118 RES TF 680 5 1 16W 200 0603 741 102 1681 R124 RES TF 100 5 1 16W 200 0603 741 102 1101 R125 RES TF 47 5 1 16W 200 0603 741 102 1470 R129 RES TF 0 5 1 16W 200 0603 741 102 1000 R901 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 R902 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 R903 RES TF 4 7K 5 1
44. 00 611 1103 C43 CAP CER 3PF 0 25PF 50V COG 0603 100 020 1030 C124 CAP CER 0 1UF 10 25V X7R 0805 100 611 2104 C44 CER 1UF 80 20 16V Y5V 0805 100 803 2105 C125 CAP CER 0 1UF 10 25V X7R 0805 100 611 2104 C45 CAP 10PF 0 5PF 50V COG 0603 100 120 1100 C126 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C46 CAP CER 9PF 0 5PF 50V COG 0603 100 120 1090 C127 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C47 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C128 CAP TA 4 7UF 20 10V A 102 023 0475 C50 CER 24PF 5 50V COG 0603 100 520 1240 C129 CAP ELE 10UF 16V 20 3X5 5 0PT 081 032 3106 51 CAP CER 22PF 5 50V COG 0603 100 520 1220 C131 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C53 CER 1UF 80 20 16V Y5V 0805 100 803 2105 C133 CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C54 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C901 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C55 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C902 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C57 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C904 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C58 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C905 CAP CER 68PF 5 50V COG 0603 100 520 1680 C59 CER 0 47UF 20 80 16V Y5V 0805 100 803 2474 C906 CAP CER 220PF 5 50V COG 0603 100 520 1221 C60 CAP TA 4 7UF 20 10V A 102 023 0475 C907 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C61 CAP TA 10UF 20 6 3V 3216 A 102 013 0106 C90
45. 000 450 000 470 000 490 000 490 000 512 000 m 30 mm H x 62 mm W x 118 mm D 253 grams pnm Nom Max Min Roe a eee 5W 6W gt 4 5W nm 1W lt 1 5W gt 0 8W Nominal conditions Time 5 10 30 Sec Power gt 90 gt 85 gt 80 T 0 5 kHz Nominal condition for VHF 0 75 kHz Nominal condition for UHF 3 0 ppm Extreme condition for UHF 5 0 ppm Extreme condition for 4 Peak 5 0 Min 3 8 Peak 22 5 Min 1 9 OX e uie ai Within 1 3dB of 6dB octave 300 Hz to 2 55 kHz for 12 5 kHz C S 300 Hz to 3 0 kHz for 25 kHz C S 5 lt 70 Nominal Condition lt 65 Extreme Condition lt 60 dBc Nominal Condition lt 55 dBc Extreme Condition 2 98 MAXON SD 125 RF LINK MODULE Modulation 100mV RMS 60 Peak Dev Hum amp Noise 25 kHz Channel Spacing gt 40 dB with no PSOPH 12 5 kHz Channel Spacing gt 40 dB with PSOPH Modulation lt 10 Peak Dev 1 kHz input for nominal dev 20dB Load ert est No osc at 10 1 VSWR all phase angles and suitable antenna No destroy at 20 1 all phase angle Peak Deviation Range Adjustment 1 kHz Nom Dev 20dB 25 kHz Channel Spacing
46. 0005 COAX CABLE AVAILABLE BOARD LEVEL COMPONENTS FOR DIGITAL BOARD SW401 1 830 130 0004 DIP SWITCH 4 POSITION L801 1 355 010 0120 INDUCTOR CHIP 12uH L802 1 355 010 0335 INDUCTOR CHIP 3 SuH X401 1 310 020 0004 CERAMIC RESONATOR 3 58MHz RV403 1 901 120 0223 VARIABLE RESISTOR 22K AVAILABLE BOARD LEVEL COMPONENTS FOR RF BOARDS Ti 1 353 012 0001 COILVAR 455kHz QUADJFT RV1 RV6 2 901 120 0103 VARIABLE RESISTOR RV2 1 901 120 0104 VARIABLE RESISTOR 100K 1 901 120 0475 VARIABLE RESISTOR 47K CONT 1 140 020 0056 CONNECTOR SKT 18P DIP CF1 1 310 101 0010 CERAMIC FILTER LT 455FW 455kHz CF2 1 310 010 0013 CERAMIC FILTER ALCFM455E 455kHz x1 1 168 044 6450 CRYSTAL 44 645MHz 1 PAIR 310 030 0015 CRYSTAL FILTER PAIR 45 1MHz NOTES 1 THE 50 125 SERIES EXTENDER BOARD P N 650 060 0016 IS REQUIRED FOR TROUBLESHOOTING 2 FOR SPECIFIC COMPONENT LOCATIONS REFER TO DIGITAL BOARD ASSEMBLY 650 010 0029 ON 52 3 FOR SPECIFIC COMPONENT LOCATIONS REFER TO RF BOARD ASSEMBLY P N 650 020 0026 ON PAGE 54 REFER TO RF BOARD ASSEMBLY 650 020 0027 ON PAGE 54 REFER TO RF BOARD ASSEMBLY P N 650 020 0029 ON PAGE 53 4 BNC CONNECTOR ITEM 15 INCLUDES ALL NECESSARY HARDWARE TO MOUNT CONNECTOR SEE NOTE 4 PAGE 55 October 98
47. 014 USM 870 100 0018 CF2 FILTER CER CF455HT 455KHZ 310 010 0013 R1 RES TF 10K 5 1 16W 200 0603 741 102 1103 CON1 CONN SKT 18P DIP 2 0MMST SMT 140 020 0056 R2 RES TF 100K 5 1 16W 200 0603 741 102 1104 D5 DIODE PIN UPP9401 T amp R S0V 2 5W 220 020 0001 R3 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 D6 DIODE PIN UPP9401 T amp R S0V 2 5W 220 020 0001 R4 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 D9 DIODE SCHOTTKY CHIP HSMS 2817 L31 220 040 0009 R5 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 012 DIODE SW KDS193 SOT 23 220 010 0003 R6 RES TF 2K 5 1 16W 200 0603 741 102 1202 D13 DIODE SW KDS181S SOT 23 220 010 0004 R7 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 014 DIODE SW KDS181S SOT 23 220 010 0004 R8 RES TF 910 5 1 10W 1TC250 0805 741 117 2911 D903 DIODE SW KDS226 SOT 23 220 010 0005 R11 RES TF 100 5 1 16W 200 0603 741 102 1101 D904 DIODE SW KDS226 SOT 23 220 010 0005 R12 RES TF 5 6K 5 1 16W 200 0603 741 102 1562 H3 SCRW MACH STL M2X6 FLH PHL ZN 330 110 0142 R13 RES TF 2 7K 5 1 16W 200 0603 741 102 1272 H4 SCRW MACH STL M2X6 FLH PHL ZN 330 110 0142 R14 RES TF 2 7K 5 1 16W 200 0603 741 102 1272 IC VREG TK11450MTR 5V SOT 23L R5 441 010 0002 R15 RES TF 100 5 1 16W 200 0603 741 102 1101 2 PLL MC145191FR2 SO 20 RS 440 440 050 0011 R16 RES TF 910 5 1 10W 1TC250 0805 741 117 2911 Ic3 IC OP AMP LM358MX SO 8 DUAL 441 030 0006 R17 RES TF 12K 59 6 1 16W 200 0603 741 102 1123
48. 06 C81 100 611 1103 C82 100 621 1471 C83 100 813 1104 C84 100 020 1020 C87 100 813 1104 C88 100 621 1102 C90 100 520 1221 C92 083 013 2334 C93 083 013 2223 C94 083 014 2103 C96 083 014 2103 C97 100 803 2105 C98 100 813 1104 C100 100 520 1221 C101 100 621 1471 C102 100 110 2070 C103 100 020 15R6 C104 100 520 2150 C111 100 621 1471 C117 100 120 2060 C118 100 520 2270 C121 100 020 1050 C122 100 803 2105 C123 100 520 1221 C124 100 020 1030 C125 100 520 1221 C126 100 120 24R7 C127 100 520 1120 C128 100 120 16R8 C129 100 803 2105 C131 100 520 1221 C133 100 621 1471 C152 100 120 16R8 C901 100 621 1471 C902 100 621 1471 C904 100 803 2474 C905 C906 C907 PAGE 27 October 98 Cap TA 4 7uF 2096 10V A CAP 10UF 20 6 3V 3216 A CAP CER 470PF 10 50V X7R 0603 CER 0 01UF 10 25V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP 10UF 20 10V B 3528 CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0805 CAP CER 9PF 0 25PF 50V COG 0805 CER 18PF 5 50V COG 0805 CAP CER 4PF 0 25PF 50V COG 0805 CAP CER 1PF 0 25PF 50V COG 0805 CAP CER 470PF 10 50V X7R 0805 CAP CER 470PF 10 50V X7R 0603 CAP CER 0 1UF 10 25V X7R 0805 CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 7PF 0 5PF 50V COG 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 9PF 0 5PF 50V COG 0603 CER 0 1UF 80 20 25V Y5V 0603 CER
49. 1 16W 200 0603 741 102 1224 R472 RES TF 120K 5 1 16W 200 0603 741 102 1124 R473 RES TF 68K 5 1 16W 200 0603 741 102 1683 R474 RES TF 100 5 1 16W 200 0603 741 102 1101 R475 RES TF 100 5 1 16W 200 0603 741 102 1101 R476 RES TF 100 5 1 16W 200 0603 741 102 1101 R477 RES TF 100 5 1 16W 200 0603 741 102 1101 R478 RES TF 10K 5 1 16W 200 0603 741 102 1103 R480 RES 100 590 1 16W 200 0603 741 102 1104 R481 RES TF 1K 5 1 16W 200 0603 741 102 1102 PAGE 26 October 98 REF C1 C2 C3 C4 C5 C6 C8 C9 C11 C12 C13 C14 C15 C16 C17 C18 C19 C21 C22 C23 C24 C25 C26 C34 C35 C36 C37 C38 C39 C41 C42 C43 C44 C45 C46 C47 C49 C50 C51 C53 C54 C55 C56 C57 C58 C59 NOTES DESCRIPTION REPLACEMENT MODULES ASSY PCB FRONT END UHF 400 430MHZ ASSY PCB PWR AMP UHF 400 430MHZ ASSY PCB TCXO ASSY PCB VCO TX RX UHF 400 430MHZ CAP CER 470PF 10 50V X7R 0603 CAP TA 10UF 2096 6 3V 3216 A CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 TA 4 7UF 20 10V A CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 CAP TA 10UF 2096 6 3V 3216 A CAP CER 0 01UF 10 25V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 0 1UF 80 20 25V Y5V 0603 CAP CER 2PF 0 25PF 50V COG 0603 CAP CER 0 1UF 80 20 25V
50. 1 TX VCO 1 i D5 1 PLL EN 1 1 1 1 1 i xen JA Ngan aaa es Bi ana EE ea ee lee 1 uD DATA i 1 sexo M CURRENT SENSOR 45V CPU 1 1 1 022 Hey CONTROL INVERTER gt 1 i AUTO POWER CONTROL 1 DC DC CONVERTER 1 1 RV1 i POWER ADJUST CURRENT DETECTOR 1 HI CONVERT 1 LOCAL LPF a12 1 RX BUFEFER RV6 9302 303 1 POWER ADJUST IR LOW CONT RXVCO FROM CPU 1 TXB 1 1 FRONT END 1 1 U405A U405B FILTER LOW NOISE AMP FILTER 1 1 1 RV2 1 MOD LEVEL 1 BUFFER 1 BUFFER 2nd LPF 2nd LPF i 1 1 E a 25KHz 455KHz End IF FILTER X401 xt E 2nd LOCAL 12 5KHz 44 645MHz uD CHAEL CHANNEL 257 QUADRATURE XF1 U401 1st IF FILTER 1st IF 5V REGULATOR 45 1MHz 68 705 8 DATA M XER INPUT DATA OUT RSSI OUT D D CONVERTER v PAO 4 386 EN U404A 13 D U403A LM339 0408 0402 EEPROM RSSI SQUELCH CONTROL DB9 DB9 CABLE LK2 LK3 U404C 11 10 PREMPHSIS U404D TX TONE U404B LM386 AUDIO 3KHz LPF R454 C422 DEMPHASIS CPU AF MUTE V0100040 CDR CorelDRAW 7 0 09 14 98 maxen A World of Communications SD 125 BLOCK DIAGRAM PAGE 43 October 98 1
51. 1223 R108 RES TF 56K 5 1 16W 200 0603 741 102 1563 R109 RES TF 0 1 1 1W 100 0603 740 521 0R10 R110 RES TF 330 5 1 16W 200 0603 741 102 1331 R111 RES TF 10K 5 1 16W 200 0603 741 102 1103 R112 RES TF 22K 5 1 16W 200 0603 741 102 1223 R115 RES TF 47K 5 1 16W 200 0603 741 102 1473 R116 RES TF 0 5 1 16W 200 0603 741 102 1000 R118 RES TF 680 5 1 16W 200 0603 741 102 1681 R124 RES TF 100 5 1 16W 200 0603 741 102 1101 R125 RES TF 47 5 1 16W 200 0603 741 102 1470 R129 RES 0 5 1 16W 200 0603 741 102 1000 R901 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 R902 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 R903 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 R904 RES TF 7 5K 5 1 16W 200 0603 741 102 1752 R905 RES TF 27K 5 1 16W 200 0603 741 102 1273 R906 RES TF 7 5K 5 1 16W 200 0603 741 102 1752 R907 RES TF 27K 5 1 16W 200 0603 741 102 1273 R908 RES TF 47 5 1 16W 200 0603 741 102 1470 R909 RES TF 470 5 1 16W 200 0603 741 102 1471 RV1 POT VRES 10K 25 ADJ 901 120 0103 RV2 100K 25 TOP ADJ 901 120 0104 RV3 POT VRES 47K 25 TOP ADJ 901 120 0473 RV6 POT VRES 10K 25 ADJ 901 120 0103 T1 COIL VAR 455KHZ QUAD IFT SMD 353 012 0001 T2 XFMR B4F FREQ MIXER 617PT 1019 SMT 840 010 0002 T3 XFMR B4F FREQ MIXER 617PT 1019 SMT 840 010 0002 x1 XTAL 44 645M 30 15PM 32P RX 3RD HC 45 168 044 6450 XF1 FILTER XTAL KFN104
52. 125 RF LINK MODULE COMPONENT PINOUT BASE DIAGRAM MANUFACTURER S PART NUMBER REFERENCE NO SCHEMATIC 25 5084 Q202 203 302 303 MMBR951 Q16 17 501 601 BFR92A Q12 25 B E Zener 5 6V D401 402 403 404 405 D407 408 409 410 38755 ALG Q6 11 13 14 19 21 C 4075 Q901 903 904 905 2 B KTA2014 9902 B E 15045 ASG Q7 8 407 Q18 31 32 34 KRC104S ND Q404 406 408 47K E 47K KRA104S PD Q5 401 402 403 405 47K E 4 7K KRA1108 NK 92 3 4 B 4 KDS181 013 14 KDS193 012 406 x P A 42 KDS226 C3 D903 904 PES 2 MMBD101 MMBV3401 4D PAGE 37 October 98 MAXON SD 125 RF LINK MODULE MANUFACTURER S October 98 BASEIDIAGRANA PART NUMBER REFERENCE NO SCHEMATIC 4 gt 5 52817 09 1 1 BASE oC 2 COLLECTOR KTA1663 Q22 B 1 4 1 EMITTER oC E 2 BASE BFG35 3 EMITTER 502 5 3 BLT50 1 4 COLLECTOR 3 21 1 4 5 8 EMITTER 9 2 3 81152 9503 567 6 7 COLLECTOR 5 19V229 D201 202 301 19 217 P FA K KDS160 D
53. 13 1104 R409 102 023 0475 R410 102 023 0475 R411 102 023 0475 R412 102 023 0475 R413 100 520 1470 R414 100 520 1470 R415 102 013 0106 R416 102 053 0105 R417 PAGE 25 October 98 CER 0 1UF 80 20 25V Y5V 0603 CER 0 1UF 80 20 25V Y5V 0603 CAP CER 0 0033UF 10 50V X7R 0603 CER 0 0027UF 5 50V X7R 0603 CAP CER 51PF 5 50V COG 0603 CER 0 1UF 80 20 25V Y5V 0603 CAP CER 330PF 5 50V COG 0603 CAP CER 51PF 5 50V COG 0603 CAP CER 100PF 5 50V COG 0603 CAP CER 100PF 5 50V COG 0603 22UF 20 35V 7343 CAP CER 0 1UF 80 20 25V Y5V 0603 CER 0 01UF 10 25V X7R 0603 CAP 100UF 20 16V E 7343 CAP CER 100PF 5 50V COG 0603 CAP TA 4 7UF 20 10V A CAP 100UF 20 16V E 7343 CONN PLUG 15P 1 25MM RT SMT CONN SKT 18P DIP 2 0MMST SMT DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE SW KDS193 SOT 23 DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE ZNR Z02W5 6V Y 5 6V 0 2W SOT 23 DIODE SW KDS160 6V 2PIN USC DIODE SCHOTTKY MBRS140T3 SMB COIL CHIP 12UH A814AY 120M P3 COIL CHIP 3 3UH 636CY 3R3M P3 TRANS PNP KRA104S SOT 23 SW PD TRANS PNP KRA104S SOT 23 SW PD TRANS PNP KRA104S SOT 23 SW PD TRANS NPN KRC104SND SOT
54. 220PF 2 100 6 17 as 5 6K 1 4 cup 120 1 58 BUSY d 17 R11 C23 GND d 910 100 0 01U P 1 TCXO1 mm 5v CON18 12 8MHz Fr poe SF OFA 9 0 01 770 100 000 MC145191F il us tog 0 33UF 0 0220 E wea f POLY 4 Nos 9 xm TK cs ee ae Tos PW c uU u 4 4 0 c 1 P D c2 B p p p p E Tk11450 10 63 R129 pem 8 7 47KB R77 02 012 G 9 ov y KDS193 r E R126 L L 1 osi as T 0 01 04 n 5 SIG Pl 190 C122 H de 4708 0 01 E c C152 22K R75 gt lt 65 7 L 3 L N F TLO62 47K C124 6125 R95 3210796 L ME E 1 0 001 0 10 01 IC7B 127 1 LM358 m gt 8106 22K ES N F RVS Q3 4331 R107 C126 N F 10K By m TAM 0 01 R76 5 47 10 xit R105 R104 22K 56K R82 455F 33K T KDS181S 1 T C131 470P L R83 c8B 0 001 2 104 20k 1062 ud 455HT 932 uve KRC104 100k C100 E R111 R112 ao 106 3 Ley ECE 10K 22K RX X 770 020 0029 DWG 770 020 0029 PLT AutoCAD R13c4 10 20 98 maxen A World of Communications SD 125 RF SCHEMATIC DIAGRAM V2 148 174MHz 770 020 0029 PAGE 45 October 98
55. 3 SW ND 870 020 0001 R69 RES TF 470K 5 1 16W 200 0603 741 102 1474 Q901 TRANS NPN KTC4075 UMT3 870 200 0031 R70 RES TF 470K 596 1 16W 200 0603 741 102 1474 Q902 TRANS PNP KTA2014 USM 870 100 0018 R71 RES TF 1K 5 1 16W 200 0603 741 102 1102 Q903 TRANS NPN KTC4075 UMT3 870 200 0031 R72 RES TF 470K 5 1 16W 200 0603 741 102 1474 PAGE 28 SEPTEMBER 98 REF DESCRIPTION PART R74 RES TF 22K 5 1 16W 200 0603 741 102 1223 R75 RES TF 18K 5 1 16W 200 0603 741 102 1183 R76 RES TF 10K 5 1 16W 200 0603 741 102 1103 R77 RES TF 1 2K 5 1 16W 200 0603 741 102 1122 R78 RES TF 22K 5 1 16W 200 0603 741 102 1223 R79 RES TF 10 5 1 16W 200 0603 741 102 1100 R82 RES TF 33K 5 1 16W 200 0603 741 102 1333 R83 RES TF 20K 5 1 16W 200 0603 741 102 1203 R92 RES TF 4 7M 596 1 16W 200 0603 741 102 1475 R94 RES TF 1K 5 1 16W 200 0603 741 102 1102 R95 RES TF 82K 5 1 16W 200 0603 741 102 1823 R96 RES TF 39K 5 1 16W 200 0603 741 102 1393 R97 RES TF 100 5 1 16W 200 0603 741 102 1101 R98 RES TF 10K 5 1 16W 200 0603 741 102 1103 R99 RES TF 100K 1 1 16W 0603 740 211 1003 R100 RES TF 68K 1 1 16W 100 0603 740 211 1683 R102 RES TF 22K 5 1 16W 200 0603 741 102 1223 R103 RES TF 10K 5 1 16W 200 0603 741 102 1103 R104 RES 10 590 1 16W 200 0603 741 102 1103 R105 RES TF 22K 5 1 16W 200 0603 741 102 1223 R106 RES TF 22K 5 1 16W 200 0603 741 102
56. 3 741 102 1473 R495 RES TF 100K 5 1 16W 200 0603 741 102 1104 R433 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 R496 RES TF 0 5 1 8W TC250 1206 741 127 3000 R434 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 R801 RES TF 10K 5 1 16W 200 0603 741 102 1103 R435 RES 10 590 1 16W 200 0603 741 102 1103 R802 RES TF 36K 5 1 16W 200 0603 741 102 1363 R436 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 R804 RES TF 0 033 1 1 10W 100 0805 740 112 033 437 RES 10 5 1 16 200 0603 741 102 1103 805 RES TF 68K 1 1 16W 100 0603 740 211 1683 R438 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 R806 RES TF 20K 5 1 16W 200 0603 741 102 1203 R439 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 RV402 RES TF 0 5 1 10W 250 0805 741 117 2000 R440 RES TF 10K 5 1 16W 200 0603 741 102 1103 RV403 POT VRES 22K 25 TOP ADJ 901 120 0223 R441 RES TF 47K 5 1 16W 200 0603 741 102 1473 RV404 RES TF 0 5 1 10W 250 0805 741 117 2000 R442 RES TF 47K 5 1 16W 200 0603 741 102 1473 401 SW DIP8P 4 POS KSD 04 SPST 830 130 0004 R443 RES TF 47K 5 1 16W 200 0603 741 102 1473 U401 IC CPU OPT MC68HC705C8FB 44 QFP 443 100 0010 R444 RES TF 47K 5 1 16W 200 0603 741 102 1473 U402 EEPROM AT93C56 10SI SO 8 2K 2 5V 442 010 0003 R445 RES TF 100K 596 1 16W 200 0603 741 102 1104 U403 IC QUAD CMPTR LM339 SO14 441 110 0003 R446 RES TF 100 5 1 16W 200 0603 741 102 1101 U404 IC SW
57. 40 dB No PSOPH 12 5 RE PERS 40 dB with PSOPH Receiver Response lt 16mS Squelch Opening Range RF level for 6 to 14 dB Sinad Squelch Closing Range 1 0 6 dB Sinad Nominal Condition Squelch Attack Time RF Level at lt 40 mS RF Level at Threshold 20 lt 30 mS Squelch Decay Time 2 RR ERE E ER 5 mS Min 20 mS Antenna Socket Input gt 10 dB Return Loss Frequency Temperature Stability Ist lt 5 ppm 2nd lt 15 ppm from 30 to 60 C Frequency Aging 2 ppm year REFERENCE CRYSTAL Os T RU REI T SEE 12 8 MHz Holder ER CSS HC 18 Temperature Characteristic 5 0 ppm from 30 C to 60 Aging Rate suite elu cee Rer rh lt 2 year in 1st year lt ppm year thereafter Lock a i cover 10 mS TXto RX lt 20 No Power Saving lt 20 4 October 98 MAXON SD 125 RF LINK MODULE ENVIRONMENTAL performance without degradation unless stated Temp rature m a kr R
58. 50 125 maxen A World of Communications SERVICE MANUAL Maxon America Inc 10828 N W Airworld Dr Kansas City MO 64153 Tel 816 891 6320 Fax 816 891 8815 Part Number 680 100 2004 October 1998 MAXON SD 125 RF LINK MODULE TABLE OF ian ag ae a read NE i SPECIFICA NONS 1 UNPACKING ober 7 INTRODUC hens d aA a 8 TEA 8 THEORY OF OPERATION 9 INTRODUCTION aka 9 DIGITAL ai aa ena a aapa ania Raia hoe a actu 9 9 SYNTHESIZER ea tes 10 gag a a 10 MAINTENANCE AND 12 ERA 12 REMOVING amp REPLACING THE UPPER COVER 12 REMOVING amp REPLACING THE DIGITAL BOARD amp SHIELD PLATE 12 REMOVING amp REPLACING THE RF 13 PROGRAMMING a fico odie sds TE TOT 14 ALIGNMENT 14 RECEIVER 14 TRANSMIT E anaa a a an ga Ce aa p XR 14 TEST EQUIPMENT 8 17 ALIGNMENT POINTS
59. 5AA 45 1M 310 030 0015 PAGE 29 October 98 MAXON SD 125 RF LINK MODULE MAXON SD 125 RF LINK MODULE REF DESCRIPTION PART REF DESCRIPTION PART C60 CAP TA 4 7UF 20 10V A 102 023 0475 REPLACEMENT MODULES C61 CAP 10UF 2096 6 3V 3216 A 102 013 0106 ASSY PCB FRONT END UHF 440 470MHZ 650 110 0017 C62 CAP CER 470PF 10 50V X7R 0603 100 621 1471 ASSY PCB PWR AMP UHF 440 470MHZ 650 230 0016 C63 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 ASSY PCB TCXO 650 100 0002 C64 CAP CER 470PF 10 50V X7R 0603 100 621 1471 ASSY PCB VCO TX RX UHF 440 470MHZ 650 030 0023 C65 CAP 10UF 2096 10V B 3528 102 023 1106 C66 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C1 CER 470PF 1096 50V X7R 0603 100 621 1471 C67 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C2 CAP TA 10UF 20 6 3V 3216 A 102 013 0106 C68 CAP CER 470PF 5 50V COG 0805 100 520 2471 C3 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C73 CAP CER 10PF 0 25PF COG 50V 0805 100 020 2100 C4 CAP CER 470PF 1096 50V X7R 0603 100 621 1471 C74 CAP CER 16PF 596 50V COG 0805 100 520 2160 CB CAP CER 470PF 10 50V X7R 0603 100 621 1471 C75 CAP CER 5PF 0 25PF 50V COG 0805 100 020 2050 C6 TA 4 7UF 2096 10V A 102 023 0475 C76 CAP CER 1PF 0 25PF 50V COG 0805 100 020 2010 C7 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C77 CAP CER 470PF 5 50V COG 0805 100 520 2471 C8 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C78 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C9 CAP CER
60. 603 100 520 1300 C26 CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C98 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C34 CAP CER 220PF 596 50V COG 0603 100 520 1221 C100 CAP 10UF 2096 6 3V 3216 A 102 013 0106 C35 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C101 CAP TA 10UF 2096 6 3V 3216 A 102 013 0106 C36 CAP CER 7PF 0 5PF 50V COG 0805 100 110 2070 C102 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C37 CAP CER 5 6PF 0 25PF 50V COG 0603 100 020 15R6 C103 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C38 CAP CER 15PF 596 50V COG 0805 100 520 2150 C104 CAP TA 1UF 2096 25V 3216 102 053 0105 C39 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C111 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C41 CAP CER 6PF 0 5PF 50V COG 0805 100 120 2060 C117 CAP CER 47PF 5 50V COG 0603 100 520 1470 C42 CAP CER 27PF 596 50V COG 0805 100 520 2270 C118 CAP CER 33PF 5 50V COG 0603 100 520 1330 C43 CER 5PF 0 25PF 50V COG 0603 100 020 1050 C121 CAP CER 20PF 596 50V COG 0603 100 520 1200 C44 CAP CER 1UF 80 2096 16V Y5V 0805 100 803 2105 C122 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C45 CER 220PF 596 50V COG 0603 100 520 1221 C123 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C46 CAP CER 3PF 0 25PF 50V COG 0603 100 020 1030 C124 CAP CER 0 1UF 10 25V X7R 0805 100 611 2104 C47 CER 220PF 596 50V COG 0603 100 520 1221 C125 CAP CER 0 1UF 10 25V X7R 0805 100 611 2104 C49 CAP CER 4 7PF 0 5PF 50V COG 0805 100 120 24R7 C126 CAP CER
61. 6K 5 V RA3 P N 770 230 0016 mE c76 D 10K 5 zc j it Q17 470PF iP K MMBR951 T T T BFR92 C72 C73 C74 R26 R31 L N F 10PF 16PF C57 zx 18 300 2 7 R27 C 470P P N 770 030 0023 n R33 6 8K RS 5 VCO MODULE UHF SCHEMATIC ae 5 R47 2R2 C66 5 4 R48 2R2 022 470 5105 C47 R28 R32 R51 282 663 vee PRE QUT 220P 220 300 m C111 CIEN 470P KTC35 16 19 IC3B C65 lt C79 0 1 LM358 10 10 1 C61 N S i n D18 R46 i ag7SS ORCAD FILE 50200026 5 R25 3 13 C63 ALL R92 47K 18NH MESE 2 2K 01 KES 4 7M AUTOCAD FILE 770 020 0026 DWG 034 R50 1 5K LIBRARIES SD125R11 LIB cas PADS FILE 200026 08 zi C 4 1UF al2 7 10K 0 47 R64 22 rtm SD125 RF MAIN BOARD ASSEMBLY 650 020 0026 BFRS2A 5 6 T 40 Resu our C43 P2 L1 12 ae ee C19 jeny 277 a ils 4 DME 1 220 TES VCO RX SECTION ITAL NOTES c85 L E t R91 R90 1 ALL VALUES ARE IN OHMS MICROHENERIES OR MICROFARADS R21 N F N F IN1 UNLESS OTHERWISE SPECIFIED 35 As 1636 1638 41 a o 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPECIFIED 63s F FRONT END SCHEMATIC 470p 7 15 RES 114 ON 51 770 110 0017 GND 4
62. 7PF 0 5PF 50V COG 0603 CAP CER 24PF 5 50V COG 0603 CER 82PF 5 50V COG 0603 CAP CER 1UF 80 20 16V Y5V 0805 CER 0 01UF 10 25V X7R 0603 CAP CER 30PF 5 50V COG 0603 CAP CER 0 001UF 10 50V X7R 0603 CAP 10UF 20 6 3V 3216 A CAP 10UF 20 6 3V 3216 A CAP CER 0 001UF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CAP TA 1UF 20 25V 3216 CAP CER 470PF 10 50V X7R 0603 CAP CER 47PF 5 50V COG 0603 CAP CER 33PF 5 50V COG 0603 CER 20PF 5 50V COG 0603 CER 0 01UF 10 25V X7R 0603 CER 0 01UF 10 25V X7R 0603 CAP CER 0 1UF 10 25V X7R 0805 CER 0 1UF 10 25V X7R 0805 CER 0 01UF 10 25V X7R 0603 CER 0 01UF 10 25V X7R 0603 CAP TA 4 7UF 20 10V A CAP ELE 10UF 16V 20 3X5 5 0PT CAP CER 0 001UF 10 50V X7R 0603 CER 0 1UF 80 20 25V Y5V 0603 CAP CER 470PF 10 50V X7R 0603 CER 0 01UF 10 25V X7R 0603 CER 0 01UF 10 25V X7R 0603 CER 0 01UF 10 25V X7R 0603 CAP CER 68PF 5 50V COG 0603 CAP CER 220PF 5 50V COG 0603 CER 0 01UF 10 25V X7R 0603 102 023 0475 102 013 0106 100 621 1471 100 611 1103 100 621 1471 102 023 1106 100 621 1471 100 621 1471 100 621 2471 100 020 2090 100 520 2180 100 020 2040 100 020 2010 100 621 2471 100 621 1471 100 611 2104 100 621 1471 100 621 1471 100 621 1471 100 120 1070 100 621 1471 100 120 1090 100 813 1104 100 120 1070 100 520 1240 100 520 1820 100 803 2105 100 611
63. 801 MMBR140T3 D802 A UPP9401 D5 6 D Q801 802 ii 14412 A NE N G 5 38 MAXON SD 125 RF LINK MODULE MANUFACTURER S DIAGRAM PART NUMBER REFERENCE NO 5 MC68HC705C8FB U401 CPU IC 4519 IC2 PLL IC 1435 0801 DC DC Convertor KIA7042P F U408 Voltage Regulator LM339 0403 Comparator MC14066 U404 Analoge SW IC LM324 U405 406 OP AMP LM358 C3 7 OP AMP 5 9 56 1051 0402 EEPROM gt LM386 U407 Audio AMP TLO62 C8 OP AMP 9 MC3371DR2 IC5 IF IC 1 IN OUT 4 6 4 65 lt gt KT11450 IC 522 3 1 1 3 PAGE 39 October 98 MAXON SD 125 RF LINK MODULE BASE DIAGRAM PIN DESCRIPTION RF Power Amp 01 Assy P N 650 230 0017 U2 P A Assy P N 650 230 0016 V2 P A Assy P N 650 230 0012 No Description 5 8 D Input GND Vcc Pre Drive Vcc Control Drive Vcc Final Output GND RX Front End 5 U1 Front End Assy P N 650 110 0019 U2 Front End Assy P N 650 110 0017 V2 Front End Assy P N 650 110 0012 RX TX VCO d U1 V C O Assy PIN 650 030 0026 U2 V C O Assy P N 650 030 0023 V2 V C O Assy P N 650 030 0025 OONO A Input GND BAV GND Output NC RX Streening TX Modulation TX Streening TX Vcc TX Out RX Vcc TX Out
64. 9 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C62 CAP CER 470PF 10 50V X7R 0603 100 621 1471 CF1 FILTER CER LT 455FW 455KHZ 310 101 0010 NOTES CF2 FILTER CER CF455HT 455KHZ 310 010 0013 1 Components are not available assembly is non repairable PAGE 33 October 98 MAXON SD 125 RF LINK MODULE REF DESCRIPTION PART REF DESCRIPTION PART CON1 CONN SKT 18P DIP 2 0MMST SMT 140 020 0056 R2 RES TF 100K 5 1 16W 200 0603 741 102 1104 05 DIODE PIN UPP9401 T amp R 50V 2 5W 220 020 0001 R3 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 D6 DIODE PIN UPP9401 T amp R S0V 2 5W 220 020 0001 R4 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 09 DIODE SCHOTTKY CHIP HSMS 2817 L31 220 040 0009 R5 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 D12 DIODE SW KDS193 SOT 23 220 010 0003 R6 RES TF 2K 5 1 16W 200 0603 741 102 1202 D13 DIODE SW KDS181S SOT 23 220 010 0004 R7 RES TF 1 8K 5 1 16W 200 0603 741 102 1182 014 DIODE SW KDS181S SOT 23 220 010 0004 R8 RES TF 910 5 1 10W TC250 0805 741 117 2911 D903 DIODE SW KDS226 SOT 23 220 010 0005 R11 RES TF 100 5 1 16W 200 0603 741 102 1101 D904 DIODE SW KDS226 SOT 23 220 010 0005 R12 RES TF 5 6K 5 1 16W 200 0603 741 102 1562 H3 SCRW MACH STL M2X6 FLH PHL ZN 330 110 0142 R13 RES TF 2 7K 5 1 16W 200 0603 741 102 1272 H4 SCRW MACH STL M2X6 FLH PHL ZN 330 110 0142 R14 RES TF 2 7K 5 1 16W 200 0603 741 102 1272 IC1 IC VREG TK11450MTR 5V SOT 23L R5 441 010 0002
65. CIFIED 9 7 VCO TX L205 33nH Q203 VCC 8 C217 4P 1 25 5084 MCO MCO Q202 28C5084 1 207 270 211 216 220 C202 10P C205 M R202 0 5P 3 100K C203 amp 0202 1P 15 229 T8 C206 5P C204 L202 D201 1 5P 470nH 43 15 229 x C306 C301 D301 ud 220P 1SV229 T8 C212 R205 220P Bok C213 R204 3P 2 2K C208 4P L203 1 2t C312 R305 220P C313 R304 3P 2 2K C308 4 C314 10P R309 R303 4 7K L303 R307 1 2t 270 V C O 440 470MHz 770 030 0023 Q303 4 25 5084 MCO MCO Q302 2SC5084 OUT C316 220P 11 PAGE 49 October 98 C601 C603 L601 680pF 56 eL C602 C604 39pF 100 NOTES 1 ALL VALUES ARE IN OHMS MICROHENRIES OR MICROFARADS UNLESS OTHERWISE SPECIFIED 2 ALL RESISTORS ARE 1 10W 5 UNLESS OTHERWISE SPECIFIED C608 33pF R603 C613 820 L604 100pF 0601 MMBR951 C614 C615 120pF NF FRONT END 148 174MHz 770 110 0012 ola aie iain po L607 6T C622 0 01uF C618 C621 NF 100 C621 C619 C618 C616 6P 2 L606 NAS 5 e 5 C623 620 C617 L605 GND 22P 4P R601 56K C615 C613 C610 C608 _ C606 C605 C602 7P 5 6 R602
66. ES TF 100 5 1 16W 200 0603 741 102 1101 D904 DIODE SW KDS226 SOT 23 220 010 0005 R12 RES TF 5 6K 5 1 16W 200 0603 741 102 1562 H3 SCRW MACH STL M2X6 FLH PHL ZN 330 110 0142 R13 RES TF 2 7K 5 1 16W 200 0603 741 102 1272 H4 SCRW MACH STL M2X6 FLH PHL ZN 330 110 0142 R14 RES TF 2 7K 5 1 16W 200 0603 741 102 1272 IC VREG TK11450MTR 5V SOT 23L R5 441 010 0002 R15 RES TF 100 5 1 16W 200 0603 741 102 1101 2 PLL MC145191FR2 SO 20 RS 440 440 050 0011 R16 RES TF 910 5 1 10W 1TC250 0805 741 117 2911 IC3 IC OP AMP LM358MX SO 8 DUAL 441 030 0006 R17 RES TF 12K 5 1 16W 200 0603 741 102 1123 5 VHF RCVR MC3371D SO 16 NWRBAND 441 060 0007 R21 RES TF 33 5 1 16W 200 0603 741 102 1330 1 7 IC AMP LM358MX SO 8 DUAL 441 030 0006 R22 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 1 8 IC OP AMP DUAL TLO62CDR SO 8 441 030 0012 R23 RES TF 100 5 1 16W 200 0603 741 102 1101 L1 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R24 RES TF 5 6K 5 1 16W 200 0603 741 102 1562 L2 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R25 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 L3 COIL CHIP 18NH 20 LL2012 F 18NM 371 010 5180 R26 RES TF 18 596 1 16W 200 0603 741 102 1180 L4 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R27 RES TF 4 7K 5 1 16W 200 0603 741 102 1472 L5 COIL CHIP 18NH 2076 LL2012 F 18NM 371 010 5180 R28 RES TF 220 5 1 16W 200 0603 741 102 1221 L6 COIL CHIP 0 82UH NL252018T
67. F 10 50V X7R 0603 100 621 1102 C94 CAP CER 1UF 80 20 16V Y5V 0805 100 803 2105 C19 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C96 CAP CER 0 01UF 10 25V X7R 0603 100 611 1103 C21 CAP METAL POLY 0 33UF 63V BOX 083 013 2334 C97 CAP CER 33PF 5 50V COG 0603 100 520 1330 C22 CAP METAL POLY 0 022UF 10 63V 083 013 2223 C98 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C23 CAP METAL POLY 0 01UF 10 63V KBOX 083 014 2103 C100 CAP TA 10UF 20 6 3V 3216 A 102 013 0106 C24 CAP METAL POLY 0 01UF 10 63V KBOX 083 014 2103 C101 CAP TA 10UF 20 6 3V 3216 A 102 013 0106 C25 CER 1UF 80 20 16V Y5V 0805 100 803 2105 C102 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 C26 CER 0 1UF 80 20 25V Y5V 0603 100 813 1104 C103 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C34 CAP CER 220PF 5 50V COG 0603 100 520 1221 C104 CAP TA 1UF 20 25V 3216 102 053 0105 C35 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 CAP CER 470PF 10 50V X7R 0603 100 621 1471 C36 CAP CER 14PF 5 50V COG 0805 100 520 2140 C117 CAP CER 47PF 5 50V COG 0603 100 520 1470 C37 CER 33PF 5 50V COG 0603 100 520 1330 C118 CAP CER 33PF 5 50V COG 0603 100 520 1330 C38 CAP CER 43PF 5 50V COG 0805 100 520 2430 C121 CAP CER 20PF 5 50V COG 0603 100 520 1200 C39 CAP CER 0 001UF 10 50V X7R 0603 100 621 1102 122 CER 0 01UF 10 25V X7R 0603 100 611 1103 C42 CAP CER 0 001UF 10 50V X7R 0805 100 621 2102 123 CER 0 01UF 10 25V X7R 0603 1
68. LE REF DESCRIPTION PART REF DESCRIPTION PART R418 RES TF 10K 5 1 16W 200 0603 741 102 1103 R482 RES 1 590 1 16W 200 0603 741 102 1102 R419 RES TF 10K 5 1 16W 200 0603 741 102 1103 R483 RES TF 1K 5 1 16W 200 0603 741 102 1102 R420 RES TF 9 1K 5 1 16W 200 0603 741 102 1912 R484 RES TF 1K 5 1 16W 200 0603 741 102 1102 R421 RES TF 10K 5 1 16W 200 0603 741 102 1103 R485 LK2 10 RES TF 0 5 1 16W 200 0603 741 102 1000 R422 RES 10 590 1 16W 200 0603 741 102 1103 R486 RES TF 68K 5 1 16W 200 0603 741 102 1683 R423 RES TF 1K 5 1 16W 200 0603 741 102 1102 R487 RES 10 590 1 16W 200 0603 741 102 1103 R424 RES TF 10K 5 1 16W 200 0603 741 102 1103 R488 RES 10 592 1 16W 200 0603 741 102 1103 R425 RES 10 590 1 16W 200 0603 741 102 1103 R489 RES 10 590 1 16W 200 0603 741 102 1103 R426 RES TF 10K 5 1 16W 200 0603 741 102 1103 R490 RES TF 10 5 1 16W 200 0603 741 102 1100 R428 RES TF 10K 5 1 16W 200 0603 741 102 1103 R491 RES TF 56K 5 1 16W 200 0603 741 102 1563 R429 RES TF 47K 5 1 16W 200 0603 741 102 1473 R492 RES TF 100K 5 1 16W 200 0603 741 102 1104 R430 RES TF 1M 5 1 16W 200 0603 741 102 1105 R493 RES TF 100K 5 1 16W 200 0603 741 102 1104 R431 RES TF 47K 5 1 16W 200 0603 741 102 1473 R494 RES TF 100K 5 1 16W 200 0603 741 102 1104 R432 RES TF 47K 5 1 16W 200 060
69. MUX MC14066BDR2 SO 14 A SW 444 050 0001 R447 RES TF 10K 5 1 16W 200 0603 741 102 1103 U405 IC OP AMP KIA324F SO 14 QUAD 441 030 0002 R448 RES TF 1M 596 1 16W 200 0603 741 102 1105 U406 IC OP AMP KIA324F SO 14 QUAD 441 030 0002 R449 RES TF 20K 5 1 16W 200 0603 741 102 1203 U407 IC AUDIO AMP LM386M 1 0 33W SO 8 441 040 0002 R450 RES TF 33K 5 1 16W 200 0603 741 102 1333 U408 IC V DET KIA7042P 4 2V SOT 89 441 020 0005 R451 RES TF 100K 5 1 16W 200 0603 741 102 1104 U801 IC DC DC CONV LTC1435CS SO 16 441 011 0005 R452 RES TF 100K 5 1 16W 200 0603 741 102 1104 X401 RESONATOR CER CSAC3 58MGC 310 020 0004 R454 RES TF 10K 5 1 16W 200 0603 741 102 1103 R455 RES TF 22K 5 1 16W 200 0603 741 102 1223 R456 RES TF 470 5 1 16W 200 0603 741 102 1471 R457 RES TF 22K 5 1 16W 200 0603 741 102 1223 R458 RES TF 100K 5 1 16W 200 0603 741 102 1104 R460 RES TF 10K 5 1 16W 200 0603 741 102 1103 R461 RES TF 10K 5 1 16W 200 0603 741 102 1103 R463 RES TF 1 8M 5 1 10W 200 0805 741 112 2185 R464 RES TF 47K 5 1 16W 200 0603 741 102 1473 R465 RES 10 590 1 16W 200 0603 741 102 1103 R466 RES TF 47K 5 1 16W 200 0603 741 102 1473 R467 RES TF 47K 5 1 16W 200 0603 741 102 1473 R468 RES 10 590 1 16W 200 0603 741 102 1103 R469 RES 100 592 1 16W 200 0603 741 102 1104 R470 RES TF 100K 5 1 16W 200 0603 741 102 1104 R471 RES TF 220K 5
70. R SR deg C Operating oii 0 e Pe A ET I CRUS EE 30 to 60 C Degradation Specified Extreme HP 40 to 80 C R charging STE re ERE ru TRE e ere SR 10 to 55 20 kV C MIC 15 kV T MIL STD 810 C Procedures I II V and IEC68 26 PROGRAMMER Programmer Interface ACC 2000 Programmer Interface Cable QPA 4000 Programmer 5 ACC 900 9 Dueto continuing research and development the company reserves the right to alter these specifications without prior notice PAGE 5 October 98 MAXON SD 125 RF LINK MODULE Intentionally Left Blank PAGE 6 October 98 MAXON SD 125 RF LINK MODULE UNPACKING The SD 125 RF Link Module is the only item included in the shipping container 7 October 98 MAXON 0 125 RF LINK MODULE INTRODUCTION The Maxon SD 125 Series of RF Link Modules from Maxon utilizes the latest technology in its design and manufacturing Both the UHF and VHF models are PLL Phase Lock Loop Synthesizer microprocessor controlled and offer one to five watts of power with 16 channel capability Multiple functions including 1200 to 9600 baud rates AC and or DC audio coupling GMSK and FSK modulation are standard in these fully programmable wide bandwidth RF Link Module units The radio is programmed using a IBM Personal Co
71. RF PCB s for troubleshooting purposes PAGE 20 October 98 MAXON SD 125 RF LINK MODULE CONTROL CIRCUIT TRANSISTOR 5 0 00 30 50 oo so 50 00150 GND 00 18 18 50 00 75 40 75 3s 00 5 0 5 0 4 7 GND 50 E 6 5 0 5 0 4 7 4 8 4 6 4 8 5 0 7 5 0408 7 5 4 0 7 3 IE RF BOARD TRANSISTOR 06 QU N gt E 18 0 95 18 0 18 0 5 0 5 0 5 0 5 0 5 0 5 0 1 2 4 0 0 5 7 9 GND eA 4 4 2 Ajo 4 06 QU 018 oo 2 ao 5 0 50 0 0 0 6 40 1 0 05 07 4 6 0 4 21 October 98 MAXON SD 125 RF LINK MODULE OO NC 5 3 __ __ ___ 22 98 MAXON SD 125 RF LINK MODULE PAGE 23 October 98 MAXON SD 125 RF LINK MODULE PAGE 24 October 98 REF C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C411 C412 C413 C414 C415 C416 C417 C422 C423 C424 C425 C426 C427 C428 C429 C430 C431 C432 C433 C434 C435 C436 C437 C438 C439 C440 C441 C442 C443 C444 C445 C446 C447 C449 C450
72. SPECIFIED 220P C90 19 770 110 0019 7P 1 GND T t T T T 116 GND i 4 3 il e veg si 4 n R119 C69 L12 T C92 C93 115 R908 t N F 12UH 24P 82P 150nH 47 6507 R131 N F 7 R909 n N F T N F T R133 E R127 N E 470 0 01 C164 C166 C171 L R66 C909 R904 R906 C26 7 100 0 01 R901 7 5k 7 5k C163 if if Lon C96 2 2K N F N F N F N F C174 0 01 0901 3 035 R17 R16 R15 9 C94 0903 KTC4075 C905 CON1 C165 N F 12K 910 100 R71 R902 R905 2 R907 vec 1 N F N E 1UF KDS226 68 Re C24 1K C904 2 20 42 133 134 C168 135 C173 136 07 0 010 0 01 R3 22k GE kfA15o4s 7T R72 ion gus ASY R14 V 4 C162 R124 m 755 1 co 470K 0902 PLL y 100 os soli 1 8K 2 7K 30P D904 KTA2014 Q904 0905 ERR C R5 1 8K R12 Q25 C901 gt gt KDS226 R903 KTC4075 KTC4075 cock 146 B B R13 BFR92A 0 01 C902 4 7K MOD IC2 R6 2K 5 6K P2 TH2 s u CLOCK ck T 67 0 01 N S SW 4 R7 2 7K 4 n 5 SW dg b 1 8K 0905 j sv 5 2 KTA4075 C906 220 AUDIO dio KTA1504S 0 001 TX EN dia R125 1 1 94 14 vop TX EN2 1 1 KEN 12 TCXO
73. T L SMD 350 000 0106 R35 RES TF 8 2K 5 1 16W 200 0603 741 102 1822 L14 COIL CHIP 0 47UH NL252018T R47J 371 804 3R47 R36 RES TF 0 5 1 16W 200 0603 741 102 1000 L15 COIL CHIP 0 15UH 5 NL252018T R15J 371 004 3R15 R37 RES TF 3 3K 5 1 16W 200 0603 741 102 1332 L18 COIL CHIP 1UH 5 NL252018T 1ROJ 371 017 3102 R41 RES TF 100 5 1 16W 200 0603 741 102 1101 L19 COIL CHIP 10UH CYLNDRCL 10 1206 371 005 3103 R42 RES TF 12K 5 1 16W 200 0603 741 102 1123 Q2 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R43 RES TF 10K 5 1 16W 200 0603 741 102 1103 Q3 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R45 RES TF 12K 5 1 16W 200 0603 741 102 1123 Q4 TRANS PNP KRA110SPK SOT 23 SW PK 870 010 0010 R46 RES TF 2 2K 5 1 16W 200 0603 741 102 1222 Q5 TRANS PNP KRA104S SOT 23 SW PD 870 010 0005 R47 RES TF 18 5 1 10W TC250 0805 741 117 2180 Q6 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R48 RES TF 18 5 1 10W TC250 0805 741 117 2180 Q7 TRANS PNP KTA1504 Y SOT 23 SW 870 100 0004 R49 RES TF 0 5 1 16W 200 0603 741 102 1000 Qs TRANS PNP KTA1504 Y SOT 23 SW 870 100 0004 R50 RES TF 1M 5 1 16W 200 0603 741 102 1105 Q11 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R51 RES TF 18 5 1 10W TC250 0805 741 117 2180 Q12 TRANS NPN BFR92A SOT 23 870 200 0020 R52 RES TF 3 3K 5 1 16W 200 0603 741 102 1332 Q13 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R53 RES TF 10K 596 1 16W 200 0603 741 102 1103 Q14 TRANS NPN KTC3875
74. Y SOT 23 SW 870 100 0004 R50 RES TF 1M 596 1 16W 200 0603 741 102 1105 Q8 TRANS PNP KTA1504 Y SOT 23 SW 870 100 0004 R51 RES TF 2 2 5 1 10W TC250 0805 741 117 2229 Q11 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R52 RES TF 3 3K 5 1 16W 200 0603 741 102 1332 Q12 TRANS NPN BFR92A SOT 23 870 200 0020 R53 RES TF 10K 5 1 16W 200 0603 741 102 1103 Q13 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R54 RES TF 1K 5 1 16W 200 0603 741 102 1102 Q14 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R55 RES TF 1 5K 5 1 16W 200 0603 741 102 1152 916 TRANS NPN BFR92A SOT 23 870 200 0020 R56 RES TF 120 59 6 1 16W 200 0603 741 102 1121 Q17 TRANS 900MHZ AMP MMBR951 SOT 23 870 200 0026 R57 RES TF 100K 1 1 16W 0603 740 211 1003 Q18 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R58 RES TF 470K 5 1 16W 200 0603 741 102 1474 Q19 Trans NPN KTC3875 BL SOT 23 870 200 0006 R59 RES TF 39 596 1 16W 200 0603 741 102 1390 Q21 TRANS NPN KTC3875 BL SOT 23 870 200 0006 R61 RES TF 68K 1 1 16W 100 0603 740 211 1683 Q22 TRANS PNP KTA1663 Y SOT 89 HC SW H Y 870 150 0002 R64 RES TF 22 596 1 16W 200 0603 741 102 1220 Q25 TRANS NPN BFR92A SOT 23 870 200 0020 R65 RES TF 51 596 1 16W 200 0603 741 102 1510 Q31 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R66 RES TF 100 5 1 16W 200 0603 741 102 1101 Q32 TRANS NPN KRC104SND SOT 23 SW ND 870 020 0001 R68 RES TF 680K 596 1 16W 200 0603 741 102 1684 Q34 TRANS NPN KRC104SND SOT 2
75. Y5V 0603 CAP CER 0 001UF 10 50V X7R 0603 CAP CER 220PF 5 50V COG 0603 METAL POLY 0 33UF 63V BOX CAP METAL POLY 0 022UF 10 63V BOX CAP METAL POLY 0 01UF 10 63V KBOX CAP METAL POLY 0 01UF 10 63V KBOX CAP CER 1UF 80 2096 16V Y5V 0805 CAP CER 0 1UF 80 20 25V Y5V 0603 CAP CER 220PF 5 50V COG 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 7PF 0 5PF 50V COG 0805 CER 5 6PF 0 25PF 50V COG 0603 CAP CER 15PF 5 50V COG 0805 CAP CER 470PF 10 50V X7R 0603 CAP CER 6PF 0 5PF 50V COG 0805 CAP CER 27PF 5 50V COG 0805 CAP CER 5PF 0 25PF 50V COG 0603 CAP CER 1UF 80 20 16V Y5V 0805 CAP CER 220PF 5 50V COG 0603 CAP CER 3PF 0 25PF 50V COG 0603 CAP CER 220PF 5 50V COG 0603 CAP CER 4 7PF 0 5PF 50V COG 0805 CAP CER 12PF 5 50V COG 0603 CAP CER 6 8PF 0 5PF 50V COG 0603 CER 1UF 80 20 16V Y5V 0805 CAP CER 220PF 5 50V COG 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 6 8PF 0 5PF 50V COG 0603 CAP CER 470PF 10 50V X7R 0603 CAP CER 470PF 10 50V X7R 0603 CER 0 47UF 20 80 16V Y5V 0805 1 Components are not available assembly is non repairable MAXON SD 125 RF LINK MODULE DESCRIPTION PART PART REF C60 C61 650 110 0019 C62 650 230 0017 C63 650 100 0002 C64 650 030 0026 C65 C66 100 621 1471 C67 102 013 0106 C68 100 621 1471 C73 100 621 1471 C74 100 621 1471 C75 102 023 0475 C76 100 621 1471 C77 100 621 1471 C78 100 621 1471 C79 100 813 1104 C80 102 013 01
76. apacity and data is written and read serially MAXON SD 125 RF LINK MODULE CHANNEL SELECTOR One of 16 channels may be selected using the Dip Switch SW401 SW401 encodes the channel number selected into 4 bit binary code The binary code plus one equals the channel number The binary code is decoded by the CPU enabling the appropriate RX or TX frequency and associated data to be selected from the EEPROM DC TO DC CONVERTER The main DC power is injected to the DC to DC converter The DC to DC converter regulates the various input power supply voltage and outputs a constant voltage of 7 5 Volts It is a source for all of the RF and digital circuits The DC to DC converter is formed by U801 Q801 Q802 L801 and R804 0801 is a switch mode DC to DC Converter IC Input DC various appears as a voltage various through R804 0801 detects the voltage and controls the switching pulse As the switching pulses Q801and Q802 switches the input DC of various supply voltages and generates the constant DC of supply voltage RF CIRCUITS TRANSMITTER The transmitter is comprised of Buffer P A Module Low Pass Filter Antenna Switch A P C Circuits E WN BUFFER VCO output level is 6dBm and amplified to 10dBm UHF 6dBm VHF The buffer consists of Q16 and 017 for isolation and gain P A MODULE The P A Module contains Q501 Q502 and Q503 Three stage amplifier Q501 amplifies the TX signal from 10 dB
77. do not use excessive solder With a hot air system apply hot air until all tinned areas are melted and the component is seated in place It may be necessary to slightly press the component down on the board Touch up the soldered connections with a standard soldering iron if needed Do not use excessive solder 9 CAUTION Some chemicals may damage the internal and external plastic parts of the radio 4 Allow the component and the board to cool and then remove all flux from the area using alcohol or another approved flux remover Surface Mounted Integrated Circuit Replacement Soldering and de soldering techniques of the surface mounted IC s are similar to the above outlined procedures for the surface mounted chip components Use extreme care and observe static precautions when removing or replacing the defective or suspect IC s This will prevent any damage to the printed circuit board or the surrounding circuitry The hot air soldering system is the best method of replacing surface mount IC s The IC s can easily be removed and installed using the hot air system See the manufacturer s instructions for complete details on tip selection and other operating instructions unique to your system If a hot air system 1s not available the service technician may wish to clip the pins near the body of the defective IC and remove it The pins can then be removed from the PCB with a standard soldering iron and tweezers and the new IC insta
78. e RSSI signal is output from IC5 on pin 13 As the receiver signals the output DC voltage is varied as much as receiver signal strength Also the DC signal is temperature compensated with a thermistor TH1 PAGE 11 October 98 MAXON SD 125 RF LINK MODULE MAXON SD 125 RF LINK MODULE GENERAL When removing or fitting use the Exploded View and Parts List located on page 55 in conjunction with the following procedures 9 WARNING Disconnect the SD 125 from all external equipment at the D Sub connector prior to disassembly REMOVING amp REPLACING THE UPPER COVER Removing the Upper Cover 1 Unscrew the four upper cover mounting screws located on the upper cover of the radio To replace the Upper Cover 1 Reverse the steps taken to remove the Upper Cover REMOVING amp REPLACING THE DIGITAL BOARD amp SHIELD PLATE Removing the Digital Board Assembly amp Shield Plate 1 Remove the Upper Cover refer to Removing amp Replacing the Upper Cover 2 Disconnect the DB9 pin connector on CON401 3 Unscrew the 4 mounting screws 4 Remove the Digital Board Assembly 5 Remove the Shield Plate To replace the Digital Board Assembly 1 Reverse the steps taken to remove the Digital Board Assembly amp Shield Plate PAGE 12 October 98 11118 Figure 1 Cover Removal Figure 2 Digital Board Assembly Removal MAXON SD 125 RF LINK MODULE REMOVING amp REPLACING THE RF
79. ing DIGITAL CIRCUITS The Digital circuit contains the CPU the channel select switch and associated digital circuits TX SIGNAL CIRCUIT The TX data signal comes from Pin 2 of Con 401 and goes through U404D The TX signal is amplified by U406C The TX signal is filtered by U405A amp which is 4 th order low pass filter the output of U405A is then fed to the RF board for TX modulation RX SIGNAL CIRCUIT The RX data signal comes from the RF board which is connected with pin 10 of Con 403 The RX signal is switched by U404A and adjusted by RV403 and amplified by U407 The amplified signal goes to pin10 of Con 401 RSSI DETECTOR From the RF board the RSSI Received Signal Strength Indicator signal flows to U403A amp B through R461 The pulse is injected from pin 5 of U403B every 1 mS and C451 is discharged It is then charged by R464 The RSSI signal is simultaneously input to pin 7 of U403A and those signals are compared The compared signal is output from U403A Pin 1 of U403A and the CPU detects the pulse width The pulse width is varied by RSSI DC voltage therefore the carrier detection is controlled by the CPU EEPROM RX channel and RSSI detection level as well as other data from the programmer are stored in the EEPROM The data stored is retained without power supplied This 1s a non volatile memory The EEPROM may have information re programmed or erased U402 is an EEPROM with 2048 8 x 256 c
80. lch level setting is a RF signal generator Radio communication test equipment is recommended 1 Power the programming adaptor box use the DC supply of 9 15 Volts 200mA 2 Hook up the SD 125 unit to the programming adaptor box and its antenna connector to the RF input port of the RF signal generator 3 With the adaptor box turned off simultaneously press and hold both ON OFF and WRITE but tons down 4 Release the ON OFF button first then the WRITE button next LED indicator on the box will flash twice after that it may stay on off this 1s of no concern because depending on the signal strength of the RF generator as well as the pre set level of squelch the SD125 may be in standby mode LED OFF or in receiving mode LED ON 5 Adjust the RF signal generator for the desired signal strength to OPEN squelch e g default setting is 113dBm that is equivalent to 0 5mV 6 Press and release READ button LED indicator will flash 3 times then it will be ON 7 Adjust the RF signal generator for the desired signal strength to CLOSE squelch e g default setting 1s 116dBm that is equivalent to 0 35mV 8 Press and release READ button LED indicator will flash 1 time then it will be OFF 9 Press and release WRITE button LED indicator will flash twice 10 Squelch level is now set Test for desired level by increasing or decreasing the RF signal to levels set PAGE 15 October 98 MAXON SD
81. lled following the Surface Mount Component Replacement procedures it may not be necessary to tin all or any of the IC pins before the installation process PAGE 19 October 98 MAXON SD 125 RF LINK MODULE SYMPTOMS CAUSES COUNTERMEASURES 1 Incomplete connection Check CON401 connection 2 Defective DC DC VCC Check U801 3 5v voltage source 5v 0 2 4 PLL error Check TCXO VCO PLL IC 5 Filtering error Check LPF IC407 6 EEPROM fail Re i 1 Defective ANT Switch Check D5 D6 2 Defective Front End Check Q601 Bad RX Sensitivity 3 Defective dBm Check D9 T2 T3 10 to 60dB 4 IF IC Replace IC5 5 VCO level drop RX VCO level 2dBm 6 Change of 1st local frequenc 6 Re Tune TCXO 1 VCO frequency change or level drop 1 Repair RX VCO Defective RX 2 Defective voltage source 2 Defective IF IC IC5 3 IC1 Q1 1 Defective 12 8 MHz TCXO 1 Replace TCXO PLL Error 2 Voltage source for RX VCP TX VCO 2 Check RX VCO TX VCO ERE TT E RT Defective PLL IC el Replace IC2 Low TX Power 1 M APC 1 Re adjust RV1 1 TX Buffer 1 Check Q16 17 No TX Power 2 Power Module 2 Check Q501 502 503 3 APC control 3 Check Q22 D4 No Modulation 1 SW IC amp Mic Amp IC 1 Check U404 405 406 1 Short protector VCC 1 Defective programming lead Unit does not work 9 An Extender Board P N 650 060 0016 is required in order to separate the Digital and
82. m to 100 mW Q502 is amplified to 0 5W Q503 amplifies to 3W and then matched to 50 Ohms using the L C network thereby reducing the harmonics by 30 dB LOW PASS FILTER L7 L8 L11 C72 C73 C74 and C75 are the 7th order Chebyshev low pass filter Unwanted harmonics are reduced by 70 dBc PAGE 9 October 98 MAXON SD 125 RF LINK MODULE ANTENNA SWITCH When transmitting the diodes D5 and are forward biased enabling the RF signal passage to the antenna D6 is shorted to ground inhibiting the RF signal to front end In receive the diodes 05 and D6 are reversed biased passing the signal from the antenna through L13 and C83 to the front end without signal loss AUTOMATIC CURRENT CONTROL ACC CIRCUITS The ACC circuit consists of R109 variable resistor RV1 IC3 B and transistors Q21 and Q22 The supply current is monitored by the difference voltage on R109 0 1 Ohm If the current varies by RF power output or other reasons it produces some bias voltage by IC3A and 019 The differential signal at the output of IC3 is passed to Q21 and Q22 that produces a constant power output to the antenna is used to adjust the RF power level RF CIRCUITS PLL SYNTHESIZER 12 8 MHz TCXO The TCXO contains the 3 stage thermistor network compensation and crystal oscillator and modulation ports Compensation is 5 PPM or less from 30c to 60c PLL IC DUAL MODULES PRESCALER Input frequency of 12 8 MHz to IC2 14519
83. mputer DOS based software an interface module and a programming cable This allows the radio to be tailored to meet the requirements of the individual user and of the System s it is operating within Maxon s SD 125 FEATURES 9 Busy Channel Lockout 9 16 Channels TY Time out 9 Power Save 9 1 5 Watt Programmable Output e 12 5 25 kHz Programmable Channel Spacing Busy Channel Lockout The Busy Channel Lockout feature when enabled disables the transmitter when the receiving channel is busy and the user attempts to transmit 16 Channels The SD 125 Series radio can store up to 16 channels within the same band TX Time out The TX Time out feature when enabled limits the amount of time that the user can continuously transmit This time can be set in increments of 10 seconds from 10 seconds to 990 seconds Power Save The Power Save feature is used when an external battery is used as the power source When Power Save is enabled the receiver ON and OFF time can be programmed into the radio and allows the operator to set the length of time the receiver is asleep PAGE 8 October 98 INTRODUCTION The VHF and UHF radios are comprised of two PCB s an RF PCB anda digital PCB These boards are connected with an 18 pin female and male connector The digital board is interfaced with external data equipment through the 9 pin d sub male connector which controls the radio and data receiving and send
84. n RX VCO and a TX VCO It is switched TX RX by the power source It is configured as a colpits oscillator and connected to the buffer as a cascade bias in order to save power The varicap diode D201 D301 are low resistance elements and produce a change in frequency with a change in reverse bias voltage 2 11v L203 L303 are resonant coils which changes the control voltage by the tuning core D202 modulation diode modulates the audio signal C204 compensates for the non linearity of the VCO due to modulation diode and maintains a constant modulation regardless of frequency RECEIVER FRONT END The receive signal is routed backward through the low pass filter then onward to Pin 1 of the Hybrid Receiver Front End Module to a bandpass filter consisting of VHF C622 through C608 L607 through L604 C601through C610 L601 through L603 is coupled to the base of Q601 which serves as an RF amplifier Diode D601 serves as protection from static RF overload from nearby transmitters The output of Q601 is then coupled to a second bandpass filter consisting of VHF C607 through C623 and L604 through L607 The output of Pin 6 is then coupled to the doubly balanced mixer D9 The receiver front end module is factory pre tuned and requires no adjustment Repair is effected by replacement of the entire module of the proper banded module These are VHF 148MHz to 174 MHz and UHF 440 MHz to 470 MHz The receiver front end module signal pins a
85. pin 20 is divided to 6 25 kHz or 5 KHz by the reference counter and then supplied to the comparator RF signal input from VCO is divided to 1 64 at the prescaler in IC2 divided by A and N counter in IC2 to determine frequency steps and then supplied to the comparator PLL comparison frequency is 6 25 5kHz so that minimum programmable frequency step is 5 6 25 kHz The A and N counter is programmed to obtain the desired frequency by serial data in the CPU In the comparator the phase difference between reference and VCO signal is compared When the phase of the reference frequency is leading Fv is the output but when VCO frequency is leading Fr is the output When Fv Fr phase detector out is a very small pulse 64 65 modulus prescaler is comprised in IC2 and has two output ports 9 Port A pin 16 TX enable 2 9 Port B pin 15 prescaler power save control PLL IC Pin 13 labeled test2 allows the technician to see LEVEL SHIFTER amp CHARGE PUMP The charge pump is used for changing output signals Fr Fv at PLL from 0 5v to 0 12v necessary for controlling the VCO REFERENCE FREQUENCY LPF The Loop Filter contains R12 C21 and C22 LPF settling time is 12mS with 1 kHz frequency This also reduces the residual side band noise for the best signal to noise ratio DC TO DC CONVERTER The DC to DC converter convert the 5v to 14 16v to supply the necessary voltage for wide range frequency in the VCO vco The VCO consist of a
86. provided with the Extender Board Assembly RECEIVER 1 Apply a standard test signal to the receiver antenna terminals 2 Adjust for maximum sensitivity and audio output with minimum audio distortion 3 Adjust RV403 for the specific audio output level RX VCO 1 Setthe unit to the highest receive frequency 470MHz UHF 174MHz VHF and adjust the VCO L303 to 8 volts 2 Setthe unit to the lowest receive frequency 440MHz UHF 148 VHF and check that the VCO voltage is above 2 0 volts If voltage is below 2 0 volts adjust L303 for 2 0 volts or more 9 Note Use TPI to measure the voltage TRANSMITTER Connect the unit to a Service Monitor with the power meter setting to the 10 W scale or autorange TCXO Set the channel selector to the mid range frequency 460 MHz adjust for a reading of 460 MHz 200Hz 155 MHz VHF models PAGE 14 October 98 TX VCO 1 Set the unit to the highest transmit frequency 470MHz UHF 174MHz VHF key the transmitter and adjust the VCO L203 to 8 volts 2 Set the unit to the lowest transmit frequency 440 MHz UHF 148 VHF key the transmitter and check that the VCO voltage is above 2 0 volts If voltage is below 2 0 volts adjust L203 for 2 0 volts or more Note use TPI to measure the voltage TX Deviation and Balance Adjustment 1 Setthe unit to a mid frequency and input the TX data with 400 Hz standard audio level 2 Increase the signal level
87. re as follows the output of the dual modulus prescaler for trouble 2 Input Ground shooting purposes no connection should be made to 3 N A batang 4 Receive 5V 5 Ground 6 Output PAGE 10 October 98 FIRST MIXER D9 T2 and T3 are double balanced mixers which provide the 45 1 MHz intermediate frequency output The filtered frequency from the front end module is coupled to T2 The 45 1 MHz IF output is matched to the input of the 2 pole monolithic filter by L14 L31 C69 and C97 The crystal filter provides a bandwidth of 7 2 kHz from the operating frequency providing a high degree of spurious and intermodulation protection Additionally a 90 MHz trap XF1 is also placed at the filter output to provide additional attenuation of the second order IMD The output of the filter is impedance matched by C97 and C69 to the base of the post of filter IF amplifier Q25 SECOND OSCILLATOR MIXER LIMITER AND FM DETECTOR The output of the post filter amplifier Q25 is coupled via C98 to the input of ICS MC3371 ICS is a monolithic single conversion FM transceiver containing a mixer the second local oscillator limiter and quadrature detector Crystal X1 44 645 MHz is used to provide resultant 455kHz signal from the output of the second mixer The mixer output is then routed to 455F These ceramic filters provide the adjacent channel selectivity of 25 kHz bandwidth RSSI RECEIVER SIGNAL STRENGTH INDICATOR Th
88. requency Synthesizer Op ration Rating vue n n y Ne REX YT Intermittent 90 5 5 Standby RX TX Power Supply ouest UBER ER rrt rh eSI OPE ER PES Ext Power Supply 12 VDC Nominal Voltage 9 0V 15 0V DC EXTREME Temperature Range SOMA GO Lotes mE ER ERRAT d ees from 40 C to 80 C from 30 C to 60 C Current Consumption Standby lt 65 mA Transmit 5 Watts RF lt 2 0 Transmit 1 Watt RF power lt 10A PAGE 1 October 98 MAXON SD 125 RF LINK MODULE Frequency Bands RX VHF V1 136 000 162 000 MHz V2 148 000 174 000 MHz UHF U2 440 000 470 000 MHz Ul 400 000 430 000 U5 420 000 450 000 U3 470 000 490 000 U4 490 000 512 000 gl TRANSMITTER Carrier Power e ERI Er HI o ga QR RE S SUP eS LOW x eebee exe Y Sustained Transmission Frequency Frequency Deviation 25 kHz Channel Spacing 12 5 kHz Channel Spacing Audio Frequency Response Adjacent Channel Power TX 136 000 162 000 MHz 148 000 174 000 MHz 440 000 470 000 MHz 400 000 430 000 420
89. ts Surface mount components should always be replaced using a temperature controlled soldering system The soldering tools may be either a temperature controlled soldering iron or a temperature controlled hot air soldering station A hot air system is recommended for the removal of components on these boards With either soldering system a temperature of 700 F 371 C should be maintained The following procedures outline the removal and replacement of surface mount components If a hot air soldering system is employed see the manufacturer s operating instructions for detailed information on the use of your system 9 CAUTION Avoid applying heat to the body of any surface mount component using standard soldering methods Heat should be applied only to the metalized terminals of the components Hot air systems do not damage the components since the heat is quickly and evenly distributed to the external surface of the component 9 CAUTION The CMOS Integrated Circuit devices used in this equipment can be destroyed by static discharges Before handling one of these devices service technicians should discharge themselves by touching the case of a bench test instrument that has a 3 prong power cord connected to an outlet with a known good earth ground When soldering or desoldering a CMOS device the soldering equipment should have a known good earth ground Surface Mount Removal 1 Grip the component with tweezers or small needle

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