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Sangean U-3, Руководство по обслуживанию

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Sangean U-3 Скачать руководство пользователя страница 9

 

4. ALIGNMENT FOR AM SENSITIVITY 

     
   a. Required Instruments 
     AM Signal Generator 
          SSVM 

   b. Alignment Procedure 
 

 

 

Mode Adjustment 

Procedure 

    (1) Turn on the radio.   
    (2) Connect a SSVM to the speaker TP8 and TP9 terminals. 

(3) Connect an AM signal generator together with standard loop dummy antenna and 

feed 30% modulated signal to the AM ferrite 

(4) Tune the generator frequency to 1404 kHz. 
(5) Tune the AM frequency to 1404 kHz and adjust TC2 to have a max reading on 

SSVM.  

    (6) Return the generator frequency to 603 kHz. 

(7) Tune the AM frequency to 603 kHz and adjust bar antenna to have a max reading on 

SSVM. 

AM 

TC2 

Bar Antenna 

(8) Repeat (4) to (7) as necessary to minimize tracking error. 

 
   c. Instrument Connection  

L8

L7

TC2

 

60  cm

The radio is located
perpendicularly to
the Loop Antenna

Loop  Antenna

AM Signal Generator

 

TP9

TP8

DVM

 

 

9

Содержание U-3

Страница 1: ...View 12 Main PCB Bottom View 13 Control PCB Top View 14 Control PCB Bottom View 15 Power PCB View 16 Wiring Diagram 17 Troubleshooting Flow Chart 18 19 Electrical Parts List 20 23 Mechanical Parts Lis...

Страница 2: ...dB 3db Limiting 1mV 98MHz 10 16 dB Min output 60dB 98MHz 1 3 mv Auto Tuning Stop Sens 98MHz 22 28 dB Current consumption 60dB 98MHz 190 210 mA TONE ATT 10K Rated output 98MHz 10 8 dB S N Ratio 60dB DI...

Страница 3: ...1404kHz 36 30 dB I F Rejection 450KHz S N 6dB 603 kHz 60 50 dB Selectivity 10KHz S N 6dB 1404kHz 50 40 dB Bandwidth 6dB S N 6dB 7 3 KHz T H D 5mV R O 2 4 Auto Tuning Stop Sens 54 60 dB m S N Ratio RF...

Страница 4: ...6 W AUX IN Dynamic Range Output R 0 ATT 0 THD 3 AUX IN 100Hz 1 0 5 Vrms I S Input Sensitivity AUX IX 100Hz ATT 0 OUT 0 5W Volume MAX 100 30 mV DISTORTION AUX IN I S 1KHz OUT R O 0 1 0 4 MIN OUTPUT AUX...

Страница 5: ...V DC DC IND DC DC SW DC DC 5V REG 9V AC ADAP BATT MAIN AMP TDA7266L EQ IC5 VR SWITCH AUX IN AUX JACK REG 6V REG 9V DC DC15V 6V DET FM OSC AMP LPF BATT DET TUNNER TA2099N F AM OSC AM ANT FM OSC IF OSC...

Страница 6: ...erator in series with a resistor of 1 2K to the C28 positive and TP14 3 Connect the RF output terminal of AM IF sweep generator to another test point TP3 4 Connect a 100 F electrolytic capacitor to te...

Страница 7: ...t Procedure 1 Turn on the radio 2 Connect the probe of DVM to the test point TP19 and TP14 3 Tune the AM frequency to 520 kHz 4 Adjust L3 to have a reading of 1 2 0 2V 5 Tune the AM frequency to 1710k...

Страница 8: ...Adjustment Procedure 1 Turn on the radio 2 Connect the probe of DVM to the TP19 and TP14 3 Tune the FM frequency to 108MHz FM L2 4 Adjust L2 to have a reading of 8 2V 0 2V 5 Tune the FM frequency to 8...

Страница 9: ...ignal to the AM ferrite 4 Tune the generator frequency to 1404 kHz 5 Tune the AM frequency to 1404 kHz and adjust TC2 to have a max reading on SSVM 6 Return the generator frequency to 603 kHz 7 Tune t...

Страница 10: ...TP2 and TP1 4 Set the signal generator to 22 5 kHz deviation with 1 kHz modulation 5 Always tune the generator frequency to exactly same as the radio band frequency before adjustment 6 Tune the FM fre...

Страница 11: ...TEST POINTS DIAGRAM 11...

Страница 12: ...MAIN PCB TOP VIEW 12...

Страница 13: ...MAIN PCB BOTTOM VIEW 13...

Страница 14: ...CONTROL PCB TOP VIEW 14...

Страница 15: ...CONTROL PCB BOTTOM VIEW 15...

Страница 16: ...POWER PCB VIEW 16...

Страница 17: ...WIRING DIAGRAM 17...

Страница 18: ...nna is directly Yes connected to the point between C4 and C5 Check the antenna terminal and antenna circuit No Yes Check waveform Check T2 and CF3 No Check CF4 2 Weak sensitivity in AM band Yes Is the...

Страница 19: ...3 Power can not be turned on Yes Check IC6 Check whether the pin8 of IC3 Is 9V DC No Yes Check DC jack and connecter wire Check whether Q7 is OK 19...

Страница 20: ...UZ 15BH T 1 D 5 1045170TA DIODE ZENER RD9 1E B1 T 1 D 11 1046011 A CH DIODE MM4148 15 D 1 4 6 10 201 204 211 1050400 A LED RED 2 5x2 M221HT F 1 LED205 1053180 A LED GRN 2 5x2 M521YGT F 1 LED204 10590...

Страница 21: ...07M 16V 6 3x7 2 C 12 251 443384KS A EL 338M 25V 16x25 S 1 C 1 4610461S0 A MY 104J 50V S 1 C 77 4833363T0A MP C 333J 50V T P 5mm 1 C 700 4900023S A EL 228M 25V 13x25 105 S 2 C 302 303 4900306T0 A EL 47...

Страница 22: ...2 2KJ C 5 R 3 46 201 202 240 6130141 A CH RD 1 16W 2 7KJ C 1 R 226 6130142 A CH RD 1 16W 3 3KJ C 3 R 24 64 65 6130143 A CH RD 1 16W 3 9KJ C 2 R 37 71 6130144 A CH RD 1 16W 4 7KJ C 9 R 9 21 59 73 78 9...

Страница 23: ...25 36 53 67 224 250 441073JT0 A EL 107M 16V 6 3x7 2 C 12 251 443384KS A EL 338M 25V 16x25 S 1 C 1 4610461S0 A MY 104J 50V S 1 C 77 4833363T0A MP C 333J 50V T P 5mm 1 C 700 4900023S A EL 228M 25V 13x2...

Страница 24: ...4 DDR3 26 30 23K9040 A EVA 35x35x8 1 A4 TONE 60A 31 23M4051 A EVA 32x26x2 5 2 A4 SB 53 SPEAKERx2 32 23N2000 A LCD LIGHT MYLAR 1 A4 PRD4 06 33 23PL000 A MYLAR 1 A4 PL 14A TUNING VRx1 34 23PL010 A SHIEL...

Страница 25: ...0026 A SCREW PTB 3x20 ZK 4 RUBBER FOOTx4 74 9102082 A SCREW PTP 2 6x8 NI 1 C PCBx1 75 9104151 A SCREW PTP M4x15 ZK 4 HANDLEx4 76 9112061 A SCREW PTF 2 6x6 ZK 2 77 9151062 A SCREW PTPW 2x6 NI 2 LED PCB...

Страница 26: ......

Страница 27: ...IC CIRCUIT BLOCK DIAGRAM 1 IC1 LA1186N 2 IC2 TA2099F 27...

Страница 28: ...3 IC3 TDA7266L 4 IC4 TC4066BP 28...

Страница 29: ...5 IC5 NJM2100L 6 IC6 IC8 BA 09FP 29...

Страница 30: ...7 IC7 XC6366B103 MRNSOT25 8 IC9 XC61CN6002MRN 30...

Страница 31: ...9 IC10 XC62FP6002PRN 10 IC201 XC62FP3002PRN 31...

Страница 32: ...11 IC200 TC9318AFAG 32...

Страница 33: ...9 5 93 0 02 0 02 9 1 57 1 77 0 21 1 82 1 82 0 10 0 0 0 08 22 1 82 1 82 0 11 0 04 1 83 1 65 23 5 95 5 98 0 35 12 4 94 4 97 0 24 24 1 82 1 82 0 IC3 TDA7266L IC4 TC4066BP IC5 NJM2100L PIN FM AM AUX PIN...

Страница 34: ...0 1 0 0 08 0 2 0 0 0 2 0 0 0 2 0 0 0 3 8 48 8 52 8 56 3 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 IC9 XC61CN6002MRN IC10 XC62FP6002PRN IC201 XC62FP3002PRN PIN FM AM AUX PIN FM AM AUX PIN FM AM AUX 1 8 60 8 64 8 6...

Страница 35: ...1 49 31 2 97 2 83 2 85 53 0 0 0 10 1 50 1 49 1 49 32 0 0 0 54 1 50 0 1 51 11 1 50 1 49 1 49 33 2 77 0 0 55 0 0 86 0 12 1 50 1 49 1 49 34 0 2 82 0 56 2 81 2 85 2 81 13 1 50 1 49 1 49 35 0 0 0 57 2 79 2...

Страница 36: ...C 0 0 0 C 4 15 0 4 48 Q5 E 3 27 3 33 3 35 Q16 E 0 0 0 Q200 E 0 0 0 B 0 0 0 B 0 0 0 B 0 0 0 C 0 73 0 0 C 7 53 7 60 7 62 C 7 22 7 28 7 31 Q6 E 0 0 0 Q17 E 0 0 0 Q201 E 0 0 0 B 7 88 7 96 7 97 B 0 6 0 0 B...

Страница 37: ...44 0 43 B 0 0 0 B 0 0 0 S 2 77 2 84 2 82 C 7 04 7 09 7 05 C 0 0 0 66 Q208 G 0 42 0 42 0 42 Q212 E 0 0 0 Q216 E 0 0 0 B 0 95 0 95 0 95 B 0 37 0 0 D 0 37 0 0 C 0 44 0 44 0 44 C 0 40 0 0 G 0 4 0 0 Q209 E...

Страница 38: ...1SV101 2SB815 C KV1610S C 1SS314 2SK212 S 1N5817 2SB808F B RLS4148 G 2SA1611 2SC4154 1SS367 ZENER 9 1V FR204 1N5821 B 2SB1386Q 2SC2223 ZENER RD15 XP162A12A6PR A Anode C Cathode E Emitter C Collector...

Страница 39: ...SCHEMATIC DIAGRAM 39...

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