Intek_MT-2020_MT-4040_serv.pdf

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1、 Model No: INTEK MMT T- -2 20 02 20 0/ /4 40 04 40 0 PMR 8 Channel LPD 69Channel Service Manual Created by: Approved by: Rev. No: For Stage : Release Date : Page 1 of 49 Model No: Drawing No: Table of Contents Pages Specifications 3 Block Diagram 4 Schematic Diagram 56 Channel Frequency Charts 78 Pr

2、inted Circuit Board 912 Test and Alignment Procedure 1317 Parts List 1837 Semiconductor Voltage Chart 3840 Semiconductor Lead Assignment and Block Diagram 4145 Exploded View and Parts List 4649 Created by: Approved by: Rev. No: For Stage : Release Date : Page 2 of 49 : Title: MT2020/4040D SERVICE MA

3、NUAL Rev. Date: January 5, 2005 SPECIFICATIONS STANDARD TEST CONDITIONS Supply Voltage - Battery 6.0Vdc 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 1.8Vrms Audio Output Impedance 8 ohms, non-i

4、nductive Test Temperature 25 GENERAL SPECIFICATIONS Transmitter CPU Controlled PLL Synthesizer Receiver CPU Controlled double conversion, super-heterodyne system Intermediate Frequency 1 st 21.4 MHz 2 nd 450 KHz Operating Frequencies PMR 446.00625MHz 446.09375 MHz LPD 433.07500 MHz 433.77500 MHz Fre

5、quency Stability 0.0005% Battery Life 30 hours (typical) Battery 4pcs AAA size Alkaline Battery or 4.8Vdc Ni-MH Battery Pack Transmitter/Receiver Switching Electrical Ambient Conditions, Temperature / Humidity -15c 55C / 40% 70% RECEIVER SPECIFICATIONS Sensitivity -120 12dB SINAD Audio Output 2Vrms

6、(w/o load) 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) PMR Band 500Mw (MT-2020) / 1W,500mW (MT-4040D) LPD Band 10mW Max. Deviation PMR 2.5 KHz(MA

7、X) LPD 5.0 KHz(MAX) Frequency Error 5ppm(-15+55) Current Drain 1.70Vrms. 8.8 Set the unit at LPD Channel 1. 8.9 Set the RF generator at 3.0kHz deviation at 1kHz modulation. 8.10 Repeat Procedure 8.5 and confirm that the RF Generator is less than 122dBm at 12dB SINAD. 9. SQUELCH THRESHOLD AND HYSTERI

8、SIS 9.1 Set unit same as 8.1. 9.2 Set the RF Generator level until unit is at 2dB Sinad or unit is squelched (RX Off). 9.3 Slowly increase the RF Signal Generator level until the unit un-squelches (RX On), confirm that the sensitivity is between 614dB SINAD (PMR Band). 10. VOX TEST 10.1 Set the unit

9、 into VOX Mode (Level 2). The VOX icon should be displayed on the LCD. 10.2 Connect an audio generator into the microphone terminal. The audio frequency should be set for 1kHz frequency with a level of 0mVrms and the output should be turned off. 10.3 Turn on the output of the audio generator. 10.4 I

10、ncrease the Audio Generator level until unit goes into TX Mode. 10.5 Check the Generator level, it should be between 0.8 2.0mV. 11. LOW BATTERY LEVEL TEST 11.1 Set the unit into standby mode. 11.2 Set the Power Supply voltage to 4.8Vdc. 11.3 Slowly decrease the Power Supply Voltage until the Battery

11、 icon appears and blink. 11.4 Observe the Power Supply Level. The level must be between 4.1 to 4.4Vdc Created by: Approved by: Rev. No: For Stage : Release Date : Page 15 of 49 Model No: Drawing No: FIGURE 1 (VCO TEST) FIGURE 2 (TX TEST) Created by: Approved by: Rev. No: For Stage : Release Date : P

12、age 16 of 49 Model No: Drawing No: FIGURE 3 (RX TEST) Created by: Approved by: Rev. No: For Stage : Release Date : Page 17 of 49 Model No: Drawing No: MT-2020 PARTS LIST C1 100P Capacitor Chip NP0 0402 1 C10 100P Capacitor Chip NP0 0402 1 C100 0.1(X7R) Capacitor Chip X7R 0603 1 C101 0.1 Capacitor Ch

13、ip Y5V 0402 1 C102 0.1 Capacitor Chip Y5V 0402 1 C103 100P Capacitor Chip NP0 0402 1 C104 100P Capacitor Chip NP0 0402 1 C105 100P Capacitor Chip NP0 0402 1 C106 10UF(3X5) Capacitor Elect. 3X5 1 C107 0.1 Capacitor Chip Y5V 0402 1 C108 820P(X7R) Capacitor Chip X7R 0402 1 C109 0.0022 Capacitor Chip X7

14、R 0402 1 C11 0.0082 Capacitor Chip X7R 0402 1 C110 0.022 Capacitor Chip X7R 0402 1 C111 0.0022 Capacitor Chip X7R 0402 1 C112 0.022 Capacitor Chip X7R 0402 1 C113 0.1 Capacitor Chip Y5V 0402 1 C115 3P Capacitor Chip NP0 0402 1 C116 100P(03) Capacitor Ceramic 0603 NP0 1 C117 0.1 Capacitor Chip Y5V 04

15、02 1 C118 100P Capacitor Chip NP0 0402 1 C119 100P Capacitor Chip NP0 0402 1 C12 1UF Capacitor Chip Y5V 0603 1 C120 100P Capacitor Chip NP0 0402 1 C121 100P Capacitor Chip NP0 0402 1 C122 1P Capacitor Chip NP0 0402 1 C123 100P Capacitor Chip NP0 0402 1 C125 0.001 Capacitor Chip X7R 0402 1 C126 100P

16、Capacitor Chip NP0 0402 1 C127 10UF(3X5) Capacitor Elect. 3X5 1 C128 10P Capacitor Chip NP0 0402 1 C129 100/6.3(5X7) Capacitor Elect 1 C13 0.01 Capacitor Chip X7R 0402 1 C130 0.039 Capacitor Chip X7R 0402 1 C131 47uF/6.3(4X7) Capacitor Elect 1 C132 100P Capacitor Chip NP0 0402 1 C133 10UF(3X5) Capac

17、itor Elect. 3X5 1 C134 0.1 Capacitor Chip Y5V 0402 1 C135 0.1 Capacitor Chip Y5V 0402 1 Created by: Approved by: Rev. No: For Stage : Release Date : Page 18 of 49 Model No: Drawing No: C136 100P Capacitor Chip NP0 0402 1 C137 100P Capacitor Chip NP0 0402 1 C138 0.0027 Capacitor Chip X7R 0402 1 C139

18、47P Capacitor Chip NP0 0402 1 C14 1P Capacitor Chip NP0 0402 1 C140 100P Capacitor Chip NP0 0402 1 C141 100P Capacitor Chip NP0 0402 1 C142 100P Capacitor Chip NP0 0402 1 C143 100P Capacitor Chip NP0 0402 1 C144 10UF(3X5) Capacitor Elect. 3X5 1 C15 2P(03) Capacitor Ceramic 0603 NP0 1 C16 220P Capaci

19、tor Chip X7R 0402 1 C162 100P Capacitor Chip NP0 0402 1 C17 2P(03) Capacitor Ceramic 0603 NP0 1 C171 0.1 Capacitor Chip Y5V 0402 1 C18 7P Capacitor Chip NP0 0402 1 C19 100P Capacitor Chip NP0 0402 1 C2 33P(03) Capacitor Ceramic 0603 NP0 1 C20 1P Capacitor Chip NP0 0402 1 C207 100P Capacitor Chip NP0

20、 0402 1 C208 33P Capacitor Chip NP0 0402 1 C209 33P Capacitor Chip NP0 0402 1 C21 10P Capacitor Chip NP0 0402 1 C211 0.1 Capacitor Chip Y5V 0402 1 C213 100P Capacitor Chip NP0 0402 1 C218 5P Capacitor Chip NP0 0402 1 C219 100P Capacitor Chip NP0 0402 1 C22 100P Capacitor Chip NP0 0402 1 C221 100P Ca

21、pacitor Chip NP0 0402 1 C222 68P Capacitor Chip NP0 0402 1 C223 22P Capacitor Chip NP0 0402 1 C223A 3P Capacitor Chip NP0 0402 1 C223B 3P Capacitor Chip NP0 0402 1 C224 22P Capacitor Chip NP0 0402 1 C224A 8P Capacitor Chip NP0 0402 1 C23 100P Capacitor Chip NP0 0402 1 C24 0.1 Capacitor Chip Y5V 0402

22、 1 C25 100P Capacitor Chip NP0 0402 1 C26 100P Capacitor Chip NP0 0402 1 C27 0.01 Capacitor Chip X7R 0402 1 C28 100P Capacitor Chip NP0 0402 1 Created by: Approved by: Rev. No: For Stage : Release Date : Page 19 of 49 Model No: Drawing No: C29 220P(X7R) Capacitor Chip X7R 0402 1 C3 0.1 Capacitor Chi

23、p Y5V 0402 1 C30 3P(03) Capacitor Ceramic 0603 NP0 1 C301 0.1 Capacitor Chip Y5V 0402 1 C302 22P Capacitor Chip NP0 0402 1 C303 4P Capacitor Chip NP0 0402 1 C304 3P Capacitor Chip NP0 0402 1 C305 220P Capacitor Chip NPO 0402 1 C306 5P Capacitor Chip NP0 0402 1 C307 3P Capacitor Chip NP0 0402 1 C308

24、470P Capacitor Chip X7R 0402 1 C309 18P Capacitor Chip NP0 0402 1 C31 220P(X7R) Capacitor Chip X7R 0402 1 C311 12P Capacitor Chip NP0 0402 1 C312 9P Capacitor Chip NP0 0402 1 C314 0.039 Capacitor Chip X7R 0402 1 C315 1UF Capacitor Chip Y5V 0603 1 C316 0.033 Capacitor Chip Y5V 0402 1 C32 0.1(X7R) Cap

25、acitor Chip X7R 0603 1 C33 0.1 Capacitor Chip Y5V 0402 1 C34 0.1 Capacitor Chip Y5V 0402 1 C35 100P Capacitor Chip NP0 0402 1 C36 0.33 Capacitor Chip Y5V 0603 1 C37 6P Capacitor Chip NP0 0402 1 C38 100P Capacitor Chip NP0 0402 1 C39 100P Capacitor Chip NP0 0402 1 C3A 4P(03) Capacitor Ceramic 0603 NP

26、0 1 C4 4P Capacitor Chip NP0 0402 1 C40 100P Capacitor Chip NP0 0402 1 C41 15P Capacitor Chip NP0 0402 1 C42 100P Capacitor Chip NP0 0402 1 C43 100P Capacitor Chip NP0 0402 1 C44 15P Capacitor Chip NP0 0402 1 C45 7P Capacitor Chip NP0 0402 1 C46 100P Capacitor Chip NP0 0402 1 C47 0.1 Capacitor Chip

27、Y5V 0402 1 C48 0.047 Capacitor Chip X7R 0402 1 C49 100P Capacitor Chip NP0 0402 1 C5 0.056 Capacitor Chip X7R 0402 1 C50 0.01 Capacitor Chip X7R 0402 1 C501 100P Capacitor Chip NP0 0402 1 Created by: Approved by: Rev. No: For Stage : Release Date : Page 20 of 49 Model No: Drawing No: C52 0.1 Capacit

28、or Chip Y5V 0402 1 C53 0.1(X7R) Capacitor Chip X7R 0603 1 C54 470P Capacitor Chip X7R 0402 1 C55 0.1 Capacitor Chip Y5V 0402 1 C56 100P Capacitor Chip NP0 0402 1 C57 0.1 Capacitor Chip Y5V 0402 1 C58 100P Capacitor Chip NP0 0402 1 C59 100P Capacitor Chip NP0 0402 1 C6 6P(03) Capacitor Ceramic 0603 N

29、P0 1 C60 0.1 Capacitor Chip Y5V 0402 1 C61 100P Capacitor Chip NP0 0402 1 C62 100P Capacitor Chip NP0 0402 1 C63 100P Capacitor Chip NP0 0402 1 C64 7P Capacitor Chip NP0 0402 1 C65 0.033 Capacitor Chip X7R 0402 1 C66 100P Capacitor Chip NP0 0402 1 C67 0.01 Capacitor Chip X7R 0402 1 C68 100P Capacito

30、r Chip NP0 0402 1 C69 10UF(3X5) Capacitor Elect. 3X5 1 C7 100P Capacitor Chip NP0 0402 1 C70 220/6.3(6.3X7) Capacitor Elect 1 C71 0.1 Capacitor Chip Y5V 0402 1 C72 0.1 Capacitor Chip Y5V 0402 1 C73 100P Capacitor Chip NP0 0402 1 C74 100P Capacitor Chip NP0 0402 1 C75 0.1 Capacitor Chip Y5V 0402 1 C7

31、6 100P Capacitor Chip NP0 0402 1 C77 0.01 Capacitor Chip X7R 0402 1 C78 0.1 Capacitor Chip Y5V 0402 1 C79 100P Capacitor Chip NP0 0402 1 C8 100P Capacitor Chip NP0 0402 1 C80 100P Capacitor Chip NP0 0402 1 C81 100P Capacitor Chip NP0 0402 1 C82 0.001 Capacitor Chip X7R 0402 1 C83 100P Capacitor Chip

32、 NP0 0402 1 C84 1UF Capacitor Chip Y5V 0603 1 C85 100P Capacitor Chip NP0 0402 1 C86 7P Capacitor Chip NP0 0402 1 C87 0.0022 Capacitor Chip X7R 0402 1 C88 0.1 Capacitor Chip Y5V 0402 1 C89 0.1 Capacitor Chip Y5V 0402 1 Created by: Approved by: Rev. No: For Stage : Release Date : Page 21 of 49 Model

33、No: Drawing No: C90 680P Capacitor Chip X7R 0402 1 C91 270P(NPO) Capacitor Chip NPO 0402 1 C92 0.0022 Capacitor Chip X7R 0402 1 C93 0.015 Capacitor Chip X7R 0402 1 C94 0.1 Capacitor Chip Y5V 0402 1 C95 0.1 Capacitor Chip Y5V 0402 1 C96 0.1 Capacitor Chip Y5V 0402 1 C97 220P(NPO) Capacitor Chip NPO 0

34、402 1 C98 0.1 Capacitor Chip Y5V 0402 1 C99 0.015 Capacitor Chip X7R 0402 1 CF1 21.4MHZ X-tal filter 21.4MHz UM-5 1 CF2 CF450KHz 450KHz IFT 5mm 1 CF3 LTM450GU Ceramic filter LTM450GU 1 CMIC1 F9745AP342-34 Condensor Mic 1 CPU1 W742S81A-XXXXX IC CPU 1 CT201 10P (Trimmer) 3 dia STC3M10-T1 1 CX201 4 MHz

35、 X-tal D4.00C(20pF) HS-49/S 1 D1 KDS114E Diode Switching 1 D10 KDS114E Diode Switching 1 D13 KDS114E Diode Switching 1 D2 KDS121 CHIP DIODE 1 D3 KDS114E Diode Switching 1 D301 KDS114E Diode Switching 1 D302 KDV154B Diode Vari-cap 1 D4 KDS115 (USM) Diode Chip 1 D5 KDS114E Diode Switching 1 D6 KDS113E

36、 Diode Switching 1 D7 KDS112 Diode Chip 1 D8 KDS112 Diode Chip 1 D9 KDS114E Diode Switching 1 IC1 S5018 IC IF 1 IC2 AZ386M IC Speaker 1 IC201 TB31202 IC PLL 1 IC3 XC6201 IC Regulator 4V 1 IC4 S324 IC OP 1 IC5 S324 IC OP 1 IC6 XC61CN2402MR 2.4Vdc Detector IC 1 J9-A EXT MIC Jack Dual LT2510C 1 L1 0.35

37、X1.7X5T(R) Inductor Air 1 L10 27NH(03) Inductor Chip 0603 1 L11 0.35X1.8X5T(R) Inductor Air 1 Created by: Approved by: Rev. No: For Stage : Release Date : Page 22 of 49 Model No: Drawing No: L12 5.6UH(05) Inductor Chip 0805 1 L13 220NH(03) Inductor Chip 0603 1 L14 18NH Inductor Chip 0402 1 L15 0.3X1

38、.4X6T(R) Inductor Air 1 L16 100NH Inductor Chip 0402 1 L18 0.3X1.0X3T(R) Inductor Air 1 L19 100NH Inductor Chip 0402 1 L2 10UH(05) Inductor Chip 0805 1 L3 0.3X1.4X6T(R) Inductor Air 1 L302 2.2UH(03) Inductor Chip 0603 1 L303 0.3X1.1X4T(R) Inductor Air 1 L4 47NH Inductor Chip 0402 1 L5 33NH Inductor

39、Chip 0402 1 L6 0.3X1.0X3T(R) Inductor Air 1 L7 0.35X1.8X5T(R) Inductor Air 1 L8 0.4X1.5X5T(L) Inductor Air 1 L9 27NH(03) Inductor Chip 0603 1 LCD1 LCD GX-XXXXX 1 LED1 LTST-S320GKT Diode LED SMT 1 LED2 DUAL_LED KPBA-3010ESGC 1 PCB1 PCB 4 Layer for MT2020D 1 Q1 THN6601B Transistor Chip 1 Q10 KRA306E T

40、ransistor BRT 1 Q11 BFQ67W Transistor Chip 1 Q12 KRC404E Transistor BRT 1 Q13 KTA1505 Transistor BRT 1 Q14 KRA306E Transistor BRT 1 Q15 KRA306E Transistor BRT 1 Q16 KRA226S Transistor BRT 1 Q17 KRC405E Transistor BRT 1 Q18 KRA226S Transistor BRT 1 Q19 KRC401E Transistor BRT 1 Q2 2SC4226 Transistor C

41、hip 1 Q21 KTC4075E Transistor Chip 1 Q22 KTC4075E Transistor Chip 1 Q23 KRC405E Transistor BRT 1 Q24 KRC404E Transistor BRT 1 Q25 KRC405E Transistor BRT 1 Q26 KRA304E Transistor BRT 1 Q27 KRC404E Transistor BRT 1 Q301 2SC4226 Transistor Chip 1 Created by: Approved by: Rev. No: For Stage : Release Da

42、te : Page 23 of 49 Model No: Drawing No: Q302 2SC4226 Transistor Chip 1 Q5 KRC404E Transistor BRT 1 Q6 2SC4226 Transistor Chip 1 Q7 KTA2014E Transistor Chip 1 Q8 2SC4226 Transistor Chip 1 Q9 2SC4083 Transistor Chip 1 R1 180K 1% Resistor Chip 0402 1% 1 R10 1K Resistor Chip 0402 1 R100 0 Resistor Chip

43、 0402 1 R101 100K Resistor Chip 0402 1 R102 1M Resistor Chip 0402 1 R103 47 Resistor Chip 0402 1 R104 47 Resistor Chip 0402 1 R105 8.2K Resistor Chip 0402 1 R106 47K Resistor Chip 0402 1 R107 39K Resistor Chip 0402 1 R108 100K Resistor Chip 0402 1 R109 5.6K Resistor Chip 0402 1 R11 560 Resistor Chip

44、 0402 1 R110 4.7K Resistor Chip 0402 1 R111 220K Resistor Chip 0402 1 R112 4.7K Resistor Chip 0402 1 R113 4.7K Resistor Chip 0402 1 R114 4.7M Resistor Chip 0402 1 R115 100K Resistor Chip 0402 1 R116 100K Resistor Chip 0402 1 R117 100K Resistor Chip 0402 1 R118 100K Resistor Chip 0402 1 R119 10K Resi

45、stor Chip 0402 1 R12 120K Resistor Chip 0402 1 R120 33K Resistor Chip 0402 1 R121 10K Resistor Chip 0402 1 R122 5.6K Resistor Chip 0402 1 R123 330 Resistor Chip 0402 1 R13 1.8K Resistor Chip 0402 1 R14 10K Resistor Chip 0402 1 R15 2.2K Resistor Chip 0402 1 R16 10K Resistor Chip 0402 1 R17 220K Resis

46、tor Chip 0402 1 R18 470K Resistor Chip 0402 1 R19 100K Resistor Chip 0402 1 Created by: Approved by: Rev. No: For Stage : Release Date : Page 24 of 49 Model No: Drawing No: R2 15K 1 R20 680K 1 R202 1K 1 R203 5.6K 1 R204 10K 1 Resistor Chip 0402 Resistor Chip 0402 Resistor Chip 0402 Resistor Chip 0402 Resistor Chip 0402 R206 0 Resistor Chip 0402 1 R207 100K Resistor Chip 0402 1 R21 1M Resistor Chip 0402 1 R214 1M Resistor Chip 0402 1 R216 1M Resistor Chip 0402 1 R22 100K Resistor Chip 0402 1 100K Resistor Chip 0402 1 R224 100 Resistor Chip 0402 1 R226 22 Resistor Chip