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Ajetrays AJ447 Service Manual

Uhf fm handheld transceivers
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AJETRAYS
MODEL AJ447

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Summary of Contents for Ajetrays AJ447

  • Page 1 AJETRAYS MODEL AJ447...

  • Page 2: Specification

    SPECIFICATION GENERAL FREQUENCY RANGE………………………………………….. 400-470MHz CHANNEL NUMBER…………………………………………… 16 CHANNEL STEP………………………………………………… 25kHz FREQUENCY GENERAL……………………………………….. SYNTHESIZER (PLL) MODULATION TYPE…………………………………………… FM (F3E) DIMENSION……………………………………………………… 107(H) ×53(W)×29.5(D) mm WEIGHT (WITH BATTERY&BATTERY)……………………….. Approx. 215g RECEIVER SENSITIVITY…………………………………………………….. < 0.30μV at 12dB SINAD SELECTIVITY……………………………………………………. 65dB SPURIOUS RESPONSE………………………………………….. 65dB DISTORTION……………………………………………………..

  • Page 3: Main Pc Board(Top View)

    MAIN PC BOARD(TOP VIEW) PAGE 2,TOTAL 16 PAGES...
  • Page 4 MAIN PC BOARD CIRCUIT(TOP VIEW) PAGE 3 ,TOTAL16 PAGES...

  • Page 5: Main Pc Board(Bottom View)

    MAIN PC BOARD(BOTTOM VIEW) PAGE 4,TOTAL 16 PAGES...
  • Page 6 MAIN PC BOARD CIRCUIT(BOTTOM VIEW) AGE 5 ,TOTAL16 PAGES...
  • Page 7 ADJUSTMENT INSTRUMENT LIST INSTRUMENT SPECIFICATION Standard Signal Frequency Range: 1 ~ 500MHz Generator Output Level: 0.1uV ~ 50mV Digital Voltmeter Measuring Range: 1mV ~ 15V Distortion Meter Measuring Range: 0.1 ~ 20% Frequency Counter Frequency Range: 1 ~ 500MHz Accuracy: ±1ppm or Better Sensitivity: 100mV or Better Oscilloscope Frequency Range: DC ~ 20MHz...

  • Page 8: Adjustment Procedures

    ADJUSTMENT PROCEDURES TRANSMITTER SECTION Item Condition Measurement Adjustment Specifications/ Test Equipment Terminal Parts Method Remarks 1. Transmit 1) CH: TX Lo RF Power Meter SOFTWARE Adjust it to 4W Power PTT: ON Ammeter PROGRAM Check 2. Transmit 1) CH: TX Center Frequency SOFTWARE Adjust to ±500Hz Frequency...

  • Page 9: Circuit Description

    CIRCUIT DESCRIPTION 1. IC DESCRIPTION The RDA1846 is a highly integrated single-chip transceiver for Walkie Talkie applications. The RDA1846 has a powerful digital signal processor, which makes it have optimum voice quality ,flexible function option ,and robust performance under varying reception conditions. 2.
  • Page 10 the power module. 3-4 Final Module The UHF power transistor RQA0009 is used to amplify the transmission power. 3-5 ANT Switch and LPF The signal from the power transistor passes through the L2, L3 and L4 LPF and is output from the ANT terminal.
  • Page 11 BILL OF MATERIAL MAIN PC BOARD (TOP SIDE) DESCRIPTION SPECIFICATION REF. NO QUANTITY CHIP C 102P C107,C108,C34,C99 C48,C49,C50,C51,C52,C53,C56,C57,C58,C59, CHIP C 103P C60,C61,C62,C63,C64,C91,C92,C93 CHIP C 104P C127,C39,C43,C68,C70,C71,C72,C73,C74,C75 CHIP C 105P C111 CHIP C 153P C100 CHIP C 220P C79,C80,C81 CHIP C 470P C121,C122,C78 CHIP C...
  • Page 12 BILL OF MATERIAL MAIN PC BOARD (TOP SIDE) DESCRIPTION SPECIFICATION REF. NO QUANTITY SPEAKER SPEAKER TRIMMING POT. VR1,VR3 GREEN 2904 PAGE 11,TOTAL 16 PAGES...
  • Page 13 BILL OF MATERIAL MAIN PC BOARD (BOTTOM SIDE) DESCRIPTION SPECIFICATION REF. NO QUANTITY CHIP C 100P C125,C82 C101,C102,C103,C104,C105,C109,C2,C31,C3 CHIP C 102P 5,L6 C11,C26,C3,C44,C45,C46,C47,C54,C55,C87,C CHIP C 103P 88,C89,C90,C94 CHIP C 104P C112,C113,C24,C40,C41,C67,C69,C76 CHIP C C117 CHIP C 150P CHIP C 150R CHIP C C116 CHIP C...
  • Page 14 BILL OF MATERIAL MAIN PC BOARD (BOTTOM SIDE) DESCRIPTION SPECIFICATION REF. NO QUANTITY CHIP R 13KF CHIP R 150R CHIP R R37,R40,R68,R69 CHIP R CHIP R CHIP R R13,R28 CHIP R 270R R44,R45 CHIP R CHIP R CHIP R 330R CHIP R 390K CHIP R...
  • Page 15 BILL OF MATERIAL MAIN PC BOARD (BOTTOM SIDE) DESCRIPTION SPECIFICATION REF. NO QUANTITY TRANSISTOR 2SK3078 TRANSISTOR DTA114EE TRANSISTOR DTC114EE TRANSISTOR DTC114EE TRANSISTOR DTC114TE TRANSISTOR TRANSISTOR RQA0009 TAN CAP. 226P/10V 24C08 AUDIO-F FP3002 RDA1846 TDA2822 FERRITE CHIP CB100 FERRITE CHIP CB101 PAGE 14,TOTAL 16 PAGES...

  • Page 16: Schematic Diagram

    SCHEMATIC DIAGRAM 9T/1.2/0.31 4T/1.6/0.35 GPLO7 AVDD GPLO6 RFIN GPLO5 GPLO4 AVDD GPLO3 GPLO2 MIC_IN GPLO1 GPLO0 AFOUT RFIN BATT-AD SDA24 SCK1846/SCK24 PAGE 15,TOTAL 16 PAGES...

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