山进sangean_mmr-77_service-电路原理图.pdf

MMR-77 FM/AM 2 BAND RECEIVER CONTENTS Specification 2-3 Block Diagram 4 Algnment Instructions5-9 Test Points Diagram.10 MAIN PCB Top View.11 MAIN PCB Bottom View.12 CONTROL PCB Top View.13 CONTROL PCB Top View.14 Wiring Diagram.15 Troubleshooting Flow Chart.16-17 Electrical Parts List.18-19 Mechanical Parts List.20-21 Exploded Views.22 IC Circuit Block Diagram.23-24 Voltage Chart.25-26 Semiconductor Lead Identifications.27 Schematic Diagram.28RadioFans.CNSPECIFICATION. FM. ELECTRICAL PERFORMANCE Model: MMR-77 Brand:SANGEAN Temp: R.H.: % Date:2005/06/15 Condition Value Test no. Test Item Input Output freq Nom.Lim 1. 2. 3. Unit Min 87.5 ±0.5 Tuning Range S/N=6dB Max 108.5 ±0.5 MHzIntermediate freq. S/N=6dB 10.7 0.15 MHzMax. Sensitivity S/N=6dB 90MHz 98MHz 106MHz 12 12 12 18 18 18 dBuUsable Sensitivity S/N=30dB 90MHz 98MHz 106MHz 20 20 20 26 26 26 dBuImage Rejection S/N=6dB 106MHz 26 20 dB I.F. Rejection S/N=6dB 90MHz 50 dB 3db Limiting (10mv) 80dBu 18 24 dBuMin. output 60dBu 1.5 3 mVTuning Ind. Sens. 26 32 Auto. Scan. Stop. Sens. Stereo indicator Sens. dBuBuzzer freq 2.5 ±0.2 KHzBuzzer Lever 2.5 2.0 VP-PS/N 46 40 dB Current Consumption RO 10mw 30 36 mAAm. Suppression (1mV) 26 dB 4500 4000 Hz Audio fidelity -6dB 100 150 Hz Max. 120 100 Output Power(75Khzdev) 10%T.H.D. 120 100 mWT. H. D. (75KHz dev.) 60dBu 1.5 3 % Over load capacity 10%T. H.D. 98MHz 100 90 dBuCalibration S/N=6dBu 90MHz 98MHz 106MHz 1000 1500 KHzLowest Batt. Volt. 60dBu 1.8 2.0 V Supply V oltage: DC 3 V R.O.: 50mW Load: 8 Ohm Modulation: 1KHz Mod./22.5KHz Dev. Remark: ( ) ( ) : ( ) ( ) ( ) : ( ) ( V ) ( ) : Approved by Released/Tested by RadioFans.CNSPECIFICATION. MW. ELECTRICAL PERFORMANCE Model: MMR-77 Brand:SANGEAN Temp: R.H.: % Date: 2005/05/15 Condition Value Test no. Test Item Input Output freq Nom.Lim 1. 2. 3. Unit Min 515 525 Tuning Range Max 1750 1710 KHzIntermediate freq. S/N=6dB Min 460 3.5 KHzMax. Sensitivity S/N=6dB 600KHz 1000KHz 1400KHz56 56 56 dBu/mUsable Sensitivity S/N=20dB 600KHz 1000KHz 1400KHz 58 56 56 64 64 64 dBu/mImage Rejection S/N=6dB 1400KHz 26 20 dB I.F. Rejection S/N=6dB 600KHz 40 40 dB Selectivity( 10KHz) S/N=6dB 26 20 dB Bandwidth(-6dB) Mod400Hz S/N=6dB 4-9 KHzT. H. D. 74dBu/m 3 5 % Lowest Batt. Volt. 74dBu/m 1.8 2.0 V Hum Modulation 100dBu/m dB Tuning Ind. Sens. 56 62 dBu/mAuto. Scan. Stop. Sens. dBu/mS/N Ration 74dBu/m 30 dB Current Consumption 74dBu/m 10mW 34 28 mA1m/120T out 10mW 74dBu/m 30 ±3 m 100 150 Hz Freq. Response (-6dB ) 74dBu/m 2200 2000 Hz MAX 120 100 Output Power(80%dev) 74dBu/m 10%T.H.D. 120 100 mWOver load capacity 80%mod. 10%T. H.D. 100 90 dBu/mA. G. C. F. O. M. 100dBu/m 1000KHz 46 40 dB Calibration S/N=6dBu 600KHz 1000KHz 1400KHz 50 70 KHzWhistle Modulation 74dBu/m 2IF/3IF 10 % Supply V oltage: DC 3V R.O.: 50mW Load: 8 Ohm Modulation: 1000Hz/30% Remark: ( ) ( ) : ( ) ( ) ( ) : ( ) ( V ) ( ) : Approved by Released/Tested by RadioFans.CNBLOCK DIAGRAM RadioFans.CN 1. ALIGNMENT FOR AM IF a. Required Instrument AM IF Sweep Generator with Scope b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON position. (2) Connect the input terminal of the AM IF sweep generator in series with a 10uF capacitor to the IC1 pin24. (3) Connect the RF output terminal of the AM IF sweep generator in series with a capacitor 0.01uF capacitor to the IC1 pin11. (4) Adjust T1 to have a maximum output with a marker frequency of 455KHz on the AM T1 sweep scope. c. Instrument Connection T1IC1 pin11 OUT IN 455KHz Marker IC1 pin24 AM IF Sweep Generator 10uF 0.01uFALIGNMENT INSTRUCTIONS RadioFans.CN 2. ALIGNMENT FOR FM FREQUENCY RANGE a. Required Instruments FM RF signal generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON position. (2) Connect a SSVM to the AF out (TP3 and TP4). (3) Connect the FM signal generator to the input terminal of TP1. (4) Set frequency of the signal generator to the standard FM band, with frequency deviation to 22.5KHz, 1KHz modulation. (5) With the tuning gang fully closed, set signal generator to 87.5MHz±0.5MHz and adjust L3 ( stretch or squeeze) for maximum reading on SSVM. (6) With the tuning gang fully open, set signal generator to 108MHz±0.5MHz, adjust TC3 for maximum reading on the SSVM. FM L3 TC3 (7) Repeat steps (5) and (6) until best sensitivity is obtained at both frequencies. c. Instrument Connection TC3 L3TP1 Signal GeneratorTP3 TP4 SSVM RadioFans.CN 3. ALIGNMENT FOR FM SENSITIVITY a. Required Instrument FM RF signal generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON position. (2) Connect a SSVM to the AF out (TP3 and TP4). (3) Connect the FM signal generator to the input terminal of TP1. (4) Set frequency of the signal generator to the standard FM band, with frequency deviation to 22.5KHz, 1KHz modulation. (5) Set signal generator to 90MHz and adjust L2 (stretch or squeeze) for maximum reading on SSVM. (6) Set signal generator to 106MHz and adjust TC2 (stretch or squeeze) for maximum reading on SSVM. FM L2 TC2 (7) Repeat steps (5) and (6) until best sensitivity is obtained at both frequencies. c. Instrument Connection L2 TC2TP1 Signal GeneratorTP3 TP4 SSVM RadioFans.CN 4. ALIGNMENT FOR MW FREQUENCY a. Required Instrument RF signal generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON position. (2) Connect a SSVM to the AF out (TP3 and TP4). (3) Connect the AM signal generator to the loop antenna (4) Set signal generator to 511KHz, with 30% modulation set tuning gang fully closed, and adjust T2 for T2 for maximum reading on SSVM. (5) Set signal generator to 1735KHz set tuning gang fully open, and adjust TC4 maximum reading on SSVM. MW T2 TC4 (6) Repeat steps (4) and (5) until best sensitivity is obtained at both frequencies. c. Instrument Connection T2 TC4TP3 TP4 SSVM RadioFans.CN 5. ALIGNMENT FOR MW SENSITIVITY a. Required Instrument RF signal generator SSVM b. Alignment Procedure Mode Adjustment Procedure (1) Set the power switch to ON position. (2) Connect a SSVM to the AF out (TP3 and TP4). (3) Connect the AM signal generator to the loop antenna (4) Set signal generator to 600KHz, with 30% modulation set tuning to signal, and adjust L1 for maximum reading on SSVM. (5) Set signal generator to 1400KHz set tuning to signal, and adjust TC1 for maximum reading on SSVM. MW L1 TC1 (6) Repeat steps (4) and (5) until best sensitivity is obtained at both frequencies. c. Instrument Connection TC1 L150 (60 cm) L1 Antenna Bar Signal GeneratorTP3 TP4 SSVM RadioFans.CNTEST POINTS DIAGRAM RadioFans.CNMAIN PCB TOP VIEW RadioFans.CNMAIN PCB BOTTOM VIEW RadioFans.CNCONTROL PCB TOP VIEW RadioFans.CNCONTROL PCB BOTTOM VIEW RadioFans.CNWIRING DIAGRAM RadioFans.CN ( 1 ) Weak sensitivity on FM mode Check whether the sensitivity is recovered if antenna is directly Yes Check the antenna terminal and connected to the point between antenna circuit. C1. No Yes Check IF waveform. Check CF1, t1. No Check C6 and L2. ( 2 ) Weak sensitivity in AM band Check the antenna circuit and antenna terminal. No No Check whether If is normal. Check T1 and IC1. Y es Check whether the antenna circuit is normal. (L1, C4) TROUBLESHOOTING FLOW CHART RadioFans.CN ( 3 ) Buzzer can not be turned on Yes Check Q3 and L4. Check whether the R8 and R10 is 3V DC. No Y es Check IC4, Q7 and Q8. Check Q2 and C14. ( 4 ) Light can not be turned ON Yes Check whether Q103 and Q104. Check whether the PIN5 of IC101 is 3V DC. No Check IC101. RadioFans.CNR9994 PART NO DESCRIPTION Q'TY REMARK 1012860 IC CXA 1619BS 1 IC 1, 1012892-A CH IC XC62FP2002PRN PbF 1 IC 3, 1014100-A CH IC BA10324AFV PbF 1 IC 2, 1014110 CH IC TC 7W74FK 2 IC 4,101, 1020211 CH TR 2SB815 B7 2 Q 6,103, 1020230-A CH TR 2SA812-T1B-A M6PbF 2 Q 8,9, 1020240-A CH TR 2SC1623T1B-AL6 8 Q 1-5,7,10,104, 1041190T DIODE 1N5817-T 1 D 301, 1041280-A CH SCHOTTKY RB160M-40PbF 7 D 3-9, 1046011 CH DIODE MM4148 2 D 1,2, 1050350 LED RED 3 20E4SRTS 1 LED2, 1053090 LED GRN 3 RT3-5034 YGS 1 LED1, 1053210-A LED GRN 3 HL304GC2E-010 2 LED103,104, 1111301 BAR COIL 1301 1 L 1, 1122371 ADJ. COIL 2371 1 T 1, 1123800 ADJCOIL 3800 613ANA034AH 1 T 2, 11311D1J CH WOUND IND. 0.68uHJ-E 1 L 5, 1136704-A FIXED COIL 33mH PbF 1 L 4, 1143150 SP.COIL 4.0x3.75Tx0.6I 1 L 2, 1144070 SP COIL 4.5x2.5Tx0.7I 1 L 3, 1200301 PVC MQ-22125-RN343-0 1 PVC 1316425-A R-VR 50KB F-12SH2 1 VR 1, 1613171 PCB A RF-G77 1 1613180 PCB C MMR-77 1 1613190 PCB D MMR-77 1 1621020-A SPK 50mm 8 0.4W 1 1630280-A SLIDE SW.1P2C(G) PbF 1 SW 3, 1631050 TACT SW 1P1C 1 SW 2, 1631632 TACK SW.130±30gf 5mm 1 SW 102, 1631680-A SLIDE SW 1P3C PbF 1 SW 1, 1640180 JACK HP TC38-061-01 BLK 1 JK 301, 1647150-A DC JACK 595J1-02KBA PbF 1 JK 302, 1660281-A DISCRI CDALF10M7GA016-B0 1 CF 3, 1664021-A FILTER PFWLF455KS2A-A0 1 CF 2, 1664120-A FILTER SFELF10M7GAA0-B0 1 CF 1, 1680070 LAMP 3x10x6.35 3V/250mA 1 LAMP 401 1701012 A2001WR2-2P 1 CON201, 1850304 H.S.TUBE 1.5 x20mm 1 1900760 MOTOR KDF-29 1 1900770-A BATT.RECHARGE AAAx2 1 GP 2149120 ANT TERMINAL PIN 1 BT+, 444754NT0 EL 475M 25V 4x7 1 C 25, 441063NT0 EL 106M 16V 4x7 3 C 9,24,26, 444760NT0 EL 476M 4V 4x7 1 C 14, 441072PT0 EL 107M 10V 5x11 1 C 302, 4900304S EL 477M 6.3V 6.3x11-S 1 C 30, 4900304T0 EL 477M 6.3V 6.3x11 1 C 33, 4B10612 CH TA 106M 6.3V 3.2x1.6 3 C 3,29,53, 5410267-A CH CC 102K 50V X7R-C 5 C 1,12,50,51,52, 5410361-A CH CC 103K 50V X7R-C 8 C 19,20,43-48, 5410458-A CH CC 104Z 16V Y5V-C 6 C 5,11,13,28,40,301, 5410557-A CH CC 105Z 10V F-C 4 C 31,41,42,106, 5422001-A CH CC 220J 50V NPO-C 1 C 6, 5422261-A CH CC 222K 50V X7R-C 1 C 18, 5422367-A CH CC 223K 25V X7R-C 1 C 27, 5427101-A CH CC 271J 50V NPO-C 1 C 22, 5430001-A CH CC 300J 50V NPO-C 1 C 7, ELECTRICAL PARTS LIST RadioFans.CNR9994 PART NO DESCRIPTION Q'TY REMARK 5447331-A CH CC 473K 25V B-C 3 C 15-17, 5447365-A CH CC 473Z 50V Y5V-C 13 C 2,21,23,32,34,35-39, 49,104,105, 6130114 CH RD 1/16W 15J-C PbF 1 R 111, 6130116 CH RD 1/16W 22J-C PbF 2 R 112,301, 6130124 CH RD 1/16W 100J-C PbF 6 R 3,4,14,31,33,110, 6130125 CH RD 1/16W 120J-C PbF 1 R 21, 6130126 CH RD 1/16W 150J-C PbF 1 R 5, 6130130 CH RD 1/16W 330J-C PbF 1 R 18, 6130133 CH RD 1/16W 560J-C PbF 1 R 10, 6130136 CH RD 1/16W 1KJ-C PbF 2 R 1,13, 6130137 CH RD 1/16W 1.2KJ-C PbF 1 R 25, 6130138 CH RD 1/16W 1.5KJ-C PbF 2 R 7,27, 6130140 CH RD 1/16W 2.2KJ-C PbF 5 R 11,12,19,26,102, 6130144 CH RD 1/16W 4.7KJ-C PbF 1 R 37, 6130145 CH RD 1/16W 5K6J-C PbF 1 R 17, 6130148 CH RD 1/16W 10KJ-C PbF 5 R 15,20,22,28,34, 6130149 CH RD 1/16W 12KJ-C PbF 1 R 2, 6130154 CH RD 1/16W 33KJ-C PbF 1 R 16, 6130156 CH RD 1/16W 47KJ-C PbF 4 R 6,24,35,108, 6130158 CH RD 1/16W 68KJ-C PbF 2 R 29,30, 6130161 CH RD 1/16W 120KJ-C 1 R 8, 6130163 CH RD 1/16W 180KJ-C 1 R 9, 6130168 CH RD 1/16W 470KJ-C 2 R 32,109, 6130172 CH RD 1/16W 1MJ-C PbF 2 R 23,107, 6130194 CH RD 1/16W OJ-C PbF 13 JP 12-16,20-23,26,32, 101,102, 6150194 CH JUMP OJ-B PbF 6 JP 17-19,24,25,301, 6480604 RDF 2W 2.2J SM15(MG) 1 R 36, 8000010 W/JUMP 5(10)0.6mm 13 JP 1-5,8-11,30,31,201, 202, 8000040 W/JUMP 10(10)0.6mm 3 JP 6,7,29, 8050200-A W/TERMINAL 50(2.5)W 1 ANT1, 8170340 W/PVC 35(6+6)BLK 2 BT_,CHBT_1 8170847 W/PVC 60(6+6)VIL 1 B 8171443 W/PVC 90(6+6)ORN 1 A 8172442 W/PVC 140(6+6)RED 1 BT+ 8591710 W/PVC/2 100(6+6) RED/WHT 1 JW 104, 8592790-A W/PVC/3 60(3+6)R/W/B 1 JW 103, 8592820-A W/2 140(6+6) R/W 1 SP+- 8592840-A W/2 100(5+3) 1 CH BT 8592900-A W/PVC/2 60(6+6)R/B 1 JW 101, ELECTRICAL PARTS LIST RadioFans.CNMMR-77 Ref no PART NO. DESCRIPTION Q'TY DWG NO. REMARK 1 20N6000 BATTERY CASE HOLDER 1 A4-N6-29A 2 20N6010 SPEAKER HOLDER 1 A2-N6-30A 3 20N6030 BAR ANT HOLDER 2 A4-N6-32A 4 20N6060 TUNING SHAFT GEAR 1 A4-N6-35A 5 20N6080 CHASSIS 1 A2-N6-37A 6 20N6090 BUZZER KNOB HOLDER 1 A4-N6-38A 7 20N6100 BAND KNOB SHAFT 1 A4-N6-39A 8 20N6110 BATT.SELECT KNOB HOLDER 1 A3-N6-40A 9 20N61201 TUNING SHAFT 1 A4-N6-41A 10 20N6130 VOLUME KNOB SHAFT 1 A4-N6-42A 11 20N61401 CRANK BASE HOLDER 1 A4-N6-64A 12 20N6150 PIN HOLDER 1 A4-N6-65A 13 20N6160 BACK LIGHT HOLDER 1 A2-N6-31B 14 20N6170 GEAR DRUM 1 A3-N6-33B 15 20N6180 TERMINAL GEAR 1 A3-N6-34B 16 20N6190 POINTER GEAR 1 A3-N6-36B 17 2111005A SPR CLICK 1 A4-N6-29A 18 21B1110A ROTARY KNOB RING 2 A4-WR1-52A 19 21N6000 PIN 1 A4-N6-05A CRANK HANDLE 20 21N6010 BATTERY SPRING 1 A4-N6-45A 21 21N6020 BATTERY CONTACT(+) 1 A4-N6-06A 22 21N6040 CRANK PLATE 1 A4-N6-58A 23 21N6050 CRANK BASE SPRING 2 A4-N6-60A 24 22L4020 HEMELON 2 A4-523-40 25 22N6000 NET 1 A4-N6-54A 26 22N6010 RIBBON 1 A4-N6-55A BACK COVER 27 23N6000 BATTERY COVER SPONGE 1 A4-N6-44A 28 23N6010 PC PLATE 1 A4-N6-57A 29 24N60001 O-RING 6 4 A4-N6-02A 30 24N6020 DC JACK SPONGE 1 A4-N6-04A 31 24N6030 SPEAKER PACKING 1 A4-N6-09A 32 24N6040 BATTERY CASE RUBBER-A 2 A4-N6-46A 33 24N6050 BATTERY CASE RUBBER-B 1 A4-N6-47A 34 24N6060 FRONT CABINET PACKING 1 A4-N6-48A 35 24N6070 NIMH BATTERY SPONGE 1 A4-N6-49A 36 24N6080 RUBBER SPACER 2 A4-N6-51A 37 24N6090 PHONE JACK SPONGE 1 A4-N6-56A 38 301N601 FRONT CABINET 1 A1-N6-12A 39 303N601 BACK COVER 1 A1-N6-13A 40 304N601 BATTERY COVER 1 A3-N6-14A 41 305N601 DIAL WINDOW 1 A4-N6-22A 42 306N601 DIAL SCALE LENS 1 A3-N6-23A 43 308N64M CRANK BASE 1 A3-N6-15A 44 309N64M CRANK HANDLE 1 A3-N6-16A 45 310N601 CRANK 1 A3-N6-17A 46 311N601 VOLUME KNOB 1 A3-N6-19A 47 312N6011 TUNING KNOB 1 A3-N6-18A 48 313N64M BAND KNOB 1 A3-N6-20A 49 314N64M BATTERY SELECT KNOB 1 A3-N6-21A 50 316N601 JACK COVER RUBBER 1 A3-N6-27A 51 316N64M1 FOOT RUBBER 4 A4-N6-28A 52 316N64M3 HAND RUBBER 1 A3-N6-26A 53 318N601 LIGHT KNOB 1 A3-N6-08A 54 325N64M BUZZER KNOB 1 A3-N6-07A 55 330N601 ROD ANT HOLDER 1 A4-N6-50A 56 331N64M BAND KNOB HOLDER 1 A3-N6-24A 57 346N601 LAMP HOLDER 1 A3-N6-60A MECHANICAL PARTS LIST RadioFans.CN