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DNT XLP77, Service Manual

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DNT XLP77 Service Manual Download Page 11

 

2.   Adjust Deviation 

 

Step 

Setting 

Connection 

Adjuster 

Adjust for 

1 

AF Modulation adjustment 

Channel   
PMR: (P1) 446.00625 MHz 
LPD: (69) 434.775 MHz 
Mic : Transmit 
Volume : Optional 
Squelch : Optional 
 

-Connection the audio generator 

(set to 1 KHz)to the microphone 
jack. 

-Connect the modulation meter 

through the RF attenuator to the 
ANT jack.   

-Adjust the audio signal level to obtain 

by 1.5 KHz deviation. When you 
increase the audio Signal by 20 dB, 
the deviation Should not exceed 2.5 
KHz deviation (Figure 3) 

RV701 
 

* For PMR: 
2.3 ~ 2.5KHz 
Normal Adjust: 
2.5KHz 
* For LPD: 
4.5~5.0KHz 
Normal Adjust: 
  5.0KHz 

 
 
 
 
 

 

 

 

Figure 3 

 
 
 
 
 
 
 
 
 

Summary of Contents for XLP77

Page 1: ...XLP77 XP8 ...

Page 2: ...it Board 8 9 Alignment and Adjustment 10 Test Equipment set up and Alignment Instructions 11 14 Trouble Shooting 15 Parts List 16 21 Semiconductor Voltage Chart 22 24 SPECIFICATIONS STANDARD TEST CONDITIONS Supply Voltage Battery 6 0V DC Antenna Impedance 50 Ohm Audio Frequency 1 KHz Main Signal Input 1mV Deviation PMR AF 1 KHz 1 5 KHz Dev LPD AF 1 KHz 3 0 KHz Dev Audio Output Power 300mW at exter...

Page 3: ...5 c 55 C 40 70 RECEIVER SPECIFICATIONS Sensitivity 0 354uV or better for 12dB SINAD Audio Output 300mW Frequency Response 300 Hz 2500 Hz Image Rejection 54dB Adjacent Channel Rejection 60dB Inter Modulation Distortion 60dB Conducted Rx Spurious 54dB TRANSMITTER SPECIFICATIONS Output Power Conducted 500mW Max Deviation PMR 2 5 KHz MAX LPD 5 0 KHz MAX Frequency Error 5ppm 15 55 Current Drain 400 mA ...

Page 4: ... CHANNEL FREQUENCY CHARTS LPD Frequency Chart Channel Frequency MHz Channel Frequency MHz 01 433 07500 36 433 95000 02 433 10000 37 433 97500 03 433 12500 38 434 00000 04 433 15000 39 434 02500 05 433 17500 40 434 05000 06 433 20000 41 434 07500 07 433 22500 42 434 10000 08 433 25000 43 434 12500 09 433 27500 44 434 15000 10 433 30000 45 434 17500 11 433 32500 46 434 20000 12 433 35000 47 434 2250...

Page 5: ...000 24 433 65000 59 434 52500 25 433 67500 60 434 55000 26 433 70000 61 434 57500 27 433 72500 62 434 60000 28 433 75000 63 434 62500 29 433 77500 64 434 65000 30 433 80000 65 434 67500 31 433 82500 66 434 70000 32 433 85000 67 434 72500 33 433 87500 68 434 75000 34 433 90000 69 434 77500 35 433 92500 ...

Page 6: ...PRINTED CIRCUIT BOARD TOP VIEW ...

Page 7: ...PRINTED CIRCUIT BOARD BOTTOM VIEW ...

Page 8: ... audio generator to the microphone jack JIG The audio frequency should be set at 1 KHz 2 Connect an FM deviation meter or communication Service Monitor to the antenna connector through an RF power attenuates 5 0 watt minimum rating 20 dB minimum attenuates Set the monitor to read peak deviation 3 Depress the PTT switch 4 Adjust the audio generator level 100 mV rms 5 Adjust RV701 for 2 5 KHz maximu...

Page 9: ...to VCO Test point Figure 1 L302 0 7 3 5 V DC 2 TX VCO voltage adjustment Channel PMR P1 446 00625 MHz LPD 69 434 775 MHz Mic Transmit Un modulated Volume Optional DC voltmeter to VCO Test point Figure 1 0 7 3 5 V DC confirm 3 Frequency adjustment Channel PMR P1 446 00625 MHz LPD 69 434 775 MHz Mic Transmit Un modulated Volume Optional Squelch Optional Antenna to frequency Counter Through Attenuato...

Page 10: ...nnel PMR P1 446 00625 MHz LPD 69 434 775 MHz Mic Transmit Volume Optional Squelch Optional Set the power supply voltage for 6V DC Connect a communications service monitor or a wattmeter and dummy load to the antenna connector Depress the PTT switch PMR 450 600mW LPD 0 8 30mW confirm 2 Low power adjustment Channel PMR P1 446 00625 MHz Mic Transmit Volume Optional Squelch Optional Set the power supp...

Page 11: ...ction the audio generator set to 1 KHz to the microphone jack Connect the modulation meter through the RF attenuator to the ANT jack Adjust the audio signal level to obtain by 1 5 KHz deviation When you increase the audio Signal by 20 dB the deviation Should not exceed 2 5 KHz deviation Figure 3 RV701 For PMR 2 3 2 5KHz Normal Adjust 2 5KHz For LPD 4 5 5 0KHz Normal Adjust 5 0KHz Figure 3 ...

Page 12: ...KHz Modulation 1 5 KHz 3 0KHz Maximum sensitivity indication on 12 dB SINAD meter 2 RX squelch adjustment Setting should be same as above RV101 Max sensitivity indication on 12 dB SINAD meter Adjust until the audio output appears 3 Distortion adjustment Setting should be same as above Connect the standard signal Generator to the EXT ANT Jack Connect the AC volts level meter distortion meter and SI...

Page 13: ... U503 Q508 Q503 Defective internal speaker Repair or replace Repair or replace Replace No noise on speaker Measure all the voltage of RF Defective squelch circuit components IC101 RV101 C131 R132 R131 C133 D103 D102 R128 R127 Replace defective component s No modulation Defective microphone Measure all the voltage of U504 RV701 Replace Replace LCD does not work Measure all the voltage of X801 IC801...

Page 14: ... TERMINAL FELT 28X6X0 5T 1 3 2 BATTERY COVER ASS Y 3 711 004 BATTERY COVER ABS GRAY 1 3 721 008 CHARGE TERMINAL SUS 304 0 15T 2 4 2 ANT ASS Y 3 711 008 ANT TUBE URETHANE BLACK 1 3 631 001 ANT SPRING SWP3 1 3 811 001 KEY PAD SILICONE RUBBER 3 SILK 3 1 3 941 003 PROTECTIVE SHEET PVC 150g 0 15T 1 3 941 007 SPONGE ANT 1 3 611 001 SCREW TAPPING SCREW PH 2 6X6 2S BLK 3 3 611 002 SCREW MACHINE SCREW PH 2...

Page 15: ...0 CHIP RESISTOR 180K 1 16W 5 J 1608 2 R504 525 3 020 220 00 CHIP RESISTOR 22 1 16W 5 J 1608 2 R607 610 3 020 221 00 CHIP RESISTOR 220 1 16W 5 J 1608 5 R102 121 609 911 912 3 020 222 00 CHIP RESISTOR 2 2K 1 16W 5 J 1608 2 R106 726 3 020 223 00 CHIP RESISTOR 22K 1 16W 5 J 1608 9 R127 136 138 141 143 305 801 904 908 3 020 224 00 CHIP RESISTOR 220K 1 16W 5 J 1608 3 R509 743 814 3 020 271 00 CHIP RESIS...

Page 16: ...10 3 110 2R2 00 CHIP CERAMIC CL05C2R2CBNC 2 2P 1 C316 3 110 2R7 00 CHIP CERAMIC CL05C2R7CBNC 2 7P 1 C616 3 110 010 00 CHIP CERAMIC CL05C010CBNC 1PF 1 C321 3 110 100 00 CHIP CERAMIC CL05C100JBNC 10PF 2 C602 613 3 110 101 00 CHIP CERAMIC CL05C101JBNC 100PF 5 C138 306 307 308 326 3 110 120 00 CHIP CERAMIC CL05C120JBNC 12PF 1 C106 3 110 140 00 CHIP CERAMIC CL05C140JBNC 14PF 1 C119 3 110 150 00 CHIP CE...

Page 17: ... 523 531 538 3 110 224 00 CHIP CERAMIC CL05B224KONC 0 22UF 1 C312 3 110 273 00 CHIP CERAMIC CL05B273KONC 0 027UF 3 C526 527 709 3 110 472 00 CHIP CERAMIC CL05B472KBNC 0 0047UF 2 C510 511 3 110 473 00 CHIP CERAMIC CL05B473KONC 0 047UF 5 C139 723 725 729 735 3 110 683 00 CHIP CERAMIC CL05B683KONC 0 068UF 1 C721 3 180 100 00 CHIP TRIMMER STC3M10 T1 10P 1 CT301 3 112 102 16 CHIP TANTAL 1uF 16V A 2 C31...

Page 18: ...01 3 331 150 10 CHIP INDUCTOR MCI1608HQR15NK 15nH 1 L602 3 331 221 10 CHIP INDUCTOR MCI1608HQR22K 220nH 3 L303 603 606 3 331 100 10 CHIP INDUCTOR MCI1608HQ10NK 10nH 1 L103 601 3 331 270 10 CHIP INDUCTOR MCI1608HQ27NK 27nH 1 L304 3 331 330 10 CHIP INDUCTOR MCI1608HQ33NK 33nH 2 L2 104 3 331 822 10 CHIP INDUCTOR MCI1608HQ8 2NK 8 2nH 1 L600 3 370 131 10 CHIP LED LAMP SA1316T HSMA C110 1 LED902 3 370 2...

Page 19: ...21 CERAMIC FILTER LTM 450FW 1 CF101 3 721 001 LCD BRACKET SPTE 0 3T 1 3 721 002 VCO CAN A SPTE 0 3T 1 3 721 003 VCO CAN B SPTE 0 3T 1 3 721 004 RF SHIELD CAN SPTE 0 3T 1 3 721 009 FILTER SHIELD CAN SPTE 0 2T 1 3 941 006 CU TAPE VCO CU 6X10X0 1T 1 3 821 001 ZEBRA SILICONE CARBONE 24 2X8 3X1T 1 3 711 007 DIFFUSER ACRYL 1 7 2 PACKING ASS Y 1 3 711 005 WINDOW LENS ACRYL CLEAR SILK 2 1 3 711 006A BELT ...

Page 20: ...K 0 40 4 0 4 0 69 4 0 4 0 12 CLK 0 41 0 0 70 3 0 3 0 13 0 0 42 4 0 4 0 71 4 0 4 0 14 0 0 43 0 0 72 4 0 4 0 15 0 0 44 4 0 4 0 73 4 0 4 0 16 0 0 45 0 0 74 4 0 4 0 17 3 0 0 46 0 0 75 4 0 4 0 18 4 0 0 47 0 0 76 4 0 4 0 19 3 0 0 48 0 4 0 77 0 0 20 4 0 0 49 4 0 0 78 0 0 21 4 0 0 50 0 0 79 0 0 22 4 0 0 51 4 0 4 0 IC801 TMP87CH21DF 80 0 0 23 0 0 52 4 0 0 1 4 0 4 0 24 4 0 4 0 53 4 0 4 0 2 0 0 25 0 0 54 4 0...

Page 21: ...TB3120FN 16 3 4 3 6 11 3 0 0 6 2 0 0 1 2 0 0 12 1 0 0 7 2 0 0 2 2 0 0 13 0 0 8 2 0 0 3 2 0 0 14 4 0 0 9 2 0 0 4 0 0 15 0 0 10 2 0 0 5 0 0 IC101 DBL5018 16 1 8 0 11 0 0 6 2 0 0 1 0 1 0 12 2 0 0 7 0 0 2 0 1 0 13 2 0 0 U502 LM358 8 4 0 0 3 0 1 0 U1 LM324 14 2 0 0 1 1 2 1 4 4 0 4 0 1 3 2 3 2 2 0 0 5 0 1 2 2 4 0 4 0 3 0 0 6 0 1 2 3 1 4 1 2 4 0 0 7 0 1 2 4 0 0 5 1 2 1 4 8 0 1 2 5 4 0 4 0 6 6 0 5 8 9 0 1...

Page 22: ... 4 0 0 0 4 0 0 0 Q502 4 0 0 0 4 0 0 0 Q503 4 0 4 0 0 4 0 4 0 0 Q504 4 0 0 0 4 0 0 0 Q505 5 4 6 0 6 0 5 4 6 0 6 0 Q507 4 0 0 0 4 0 0 0 Q508 3 8 6 0 6 0 3 8 6 0 6 0 Q601 0 0 0 1 5 0 8 4 0 Q602 0 0 0 1 0 0 2 3 0 Q604 0 4 0 0 0 4 0 3 0 Q605 0 0 6 0 0 0 6 0 Q606 0 0 6 0 0 0 6 0 Q607 0 0 6 0 0 0 6 0 Q701 0 8 0 0 0 8 0 0 Q702 0 0 3 6 2 0 0 0 Q703 0 6 0 1 4 0 6 0 1 4 Q704 0 0 0 0 0 4 1 4 Q751 3 8 4 0 0 3 ...

Page 23: ...K DIAGRAM DIODEs KDV154 VHF UHF Tuner AFC VCO for UHF BAND Radio KDS114 VHF Tuner BAND Switch Applications KDS115 VHF Tuner BAND Switch Applications KDS120 Ultra High Speed Switching Application KDS121 Ultra High Speed Switching Application ...

Page 24: ...ircuit and Driver Circuit Application KRA305 Switching Application Interface Circuit and Driver Circuit Application KRC404 Switching Application Interface Circuit and Driver Circuit Application KRC405 Switching Application Interface Circuit and Driver Circuit Application KRC411 Switching Application Interface Circuit and Driver Circuit Application KRC412 Switching Application Interface Circuit and...

Page 25: ...ICs LM386MX 1 Equivalent Schematic and Configuration Diagram ...

Page 26: ...LM324MX ...

Page 27: ......

Page 28: ...LM358MX ...

Page 29: ...TMP87CM21CDF Pin assignments top view ...

Page 30: ...Block Diagram AT24C02N 10SC 2 7 ...

Page 31: ...TB31202FN ...

Page 32: ...R1120N401B ...

Page 33: ...EXPLODED VIEW ...

Page 34: ...EXPLODED VIEW PARTS LIST ...

Page 35: ......

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