djx2_SM.pdf

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1、DJ-X2E/DJ-X2T Service Manual CONTENTS SPECIFICATIONS 1) GENERAL . 2 2) RECEIVER . 2 CIRCUIT DESCRIPTION 1) Receiver . 35 2) M38224M6M(E:XA0728, T:XA0729) . 6 3) Terminal function of CPU . 7 SEMICONDUCTOR DATA 1) NJM2070M (XA0210) . 8 2) uPD3140GS-E1 (XA0312) . 89 3) TC4W53FU (XA0348). 9 4) S-80730SL

2、-AT (XA00356) . 10 5) M5222FP-600C (XA0385) . 10 6) XC62SPR332MR (XA0519). 11 7) NJM2904V (XA0573). 11 8) MB88347LPFV-G-BND-EF (XA0599) . 12 9) TK11816M (XA0665) . 13 10) TTK10931V (XA0666) . 13 11) TA4101FTE12L (XA0667). 14 12) S-80829ALNP-EAS-T2 (XA0668) . 14 13) BR24C64F-E2 (XA0669) . 15 14) uPC2

3、757T-E3 (XA0743) . 16 15) Transistor, Diode, and LED Ontline Drawings. 17 16) LCD Connection . 18 EXPLODED VIEW 1) Front View. 19 2) Rear View . 20 PARTS LIST CPU Unit . 21 MAIN Unit . 2125 ADJUSTMENT 1) Entering and releasing the adjustment mode . 26 2) Adjustment . 2627 PC BOARD VIEW. 2829 SCHEMAT

4、IC DIAGRAM. 3031 BLOCK DIAGRAM. 32 ALINCO,INC. 2 SPECIFICATIONS 1) GENERAL Receiving coverageE: 0.522 999.995MHz T: 0.530 823.995MHz 850.000 868.995MHz 895.000 999.995MHz Wave typeFM, WFM, AM Ant. impedance50 Ant. terminalSMA Supply voltageDC 3.8V (Internal lithium-ion battery) DC 4.5V (when using E

5、DH-27) GroundNegative ground Current consumptionReception : approx. 80 mA Battery save (1 : 4) : approx.25mA Temperature range-10 +60C (14 140F) Frequency stability5 ppm (-10 +60C) (+14 +140F) Dimension58 (W) 90 (H) 15 (D) mm (without projections) (2.28(W) 3.54(H) 0.59(D) in.) WeightApprox. 85g (Lit

6、hium-ion battery inclusive) (Approx. 3oz.) 2) RECEIVER SystemTriple-conversion superheterodyne First I.F.248.45MHz Second I.F.38.85MHz Third I.F.450kHz SensitivityAM/FM-6dB/12kHz or over, -60dB/30kHz or less WFM-6dB/150kHz or over SelectivityFM/WFM 12dB SINAD, AM 10dB S/N typ.FM: 30 1080.63uV(-4dBu)

7、 136 2220.40uV(-8dBu) 222 4700.50uV(-6dBu) 470 7700.56uV(-5dBu) 770 10000.71uV(-3dBu) WFM : 76 1083.20uV(10dBu) 175 2222.20uV(7dBu) 470 7703.20uV(10dBu) AM: 0.5 1.627.10uV(17dBu) 1.62 301.40uV(3dBu) 108 1362.00uV(6dBu) 222 3301.80uV(5dBu) 3 CIRCUIT DESCRIPTION 1) Receiver 1. Receiver system : Triple

8、 Superheterodyne Conversion 1st IF.:248.45MHz 2nd IF.:38.85MHz 3rd IF.:450KHz 2. Front End 0.5 29.995MHz The signal from the antenna is switched by the band switch (D109), passed through the low-pass filter and amplified by RF amplifier Q109. Then the signal is fed to the 1st mixer IC103 via the ban

9、d switch D115. 30 136.995MHz The signal from the antenna is switched by the band switch (D128), passed through the low-pass filter and amplified by RF amplifier Q111. Then the signal is fed to the 1st mixer IC103 via the band switch D112. 137 222.995MHz The signal from the antenna is switched by the

10、 band switch (D116), passed through the low-pass filter and amplified by RF amplifier Q116. Then the signal is fed to the 1st mixer IC103 via the band switches D107 and D129. 223 367.995MHz The signal from the antenna is switched by the band switch (D132), passed through the low-pass filter and ampl

11、ified by RF amplifier Q118. Then the signal is fed to the 1st mixer IC103 via the band switches D107 and D129. 368 469.995MHz The signal from the antenna is switched by the band switch (D122), passed through the low-pass filter and amplified by RF amplifiers Q123 and Q138. Then the signal is fed to

12、the 1st mixer IC103 via the band switch D134. 470 999.995MHz The signal from the antenna is switched by the band switch (D133), passed through the low-pass filter and amplified by RF amplifier Q126. Then the signal is fed to the 1st mixer IC103 via the band switch D120. 3. Mixer The 1st Mixer The in

13、put signal and 1st local signal generate sum and difference frequencies in the mixer IC103. SAW filter FL101 selects the signal of 248.45MHz and eliminates the adjacent channel signals. The 2nd Mixer The input signal and the 2nd local signal generate sum and difference fre- quencies in the mixer IC1

14、04. Then the signals are divided into the receiving sides of FM/AM and WFM at D113 and D114. 4 FM/AM In the receiving side of FM/AM the signal of 38.85MHz is selected by crystal filter XF101. Then the signal is amplified at the 1st IF amplifier Q112 after eliminating the adjacent channel signal. WFM

15、 In the receiving side of WFM the signal of 38.85MHz is selected by band-pass filter. Then the signal is amplified at the 1st IF amplifier Q112 after eliminating the adjacent channel signal. 4. IF FM/AM The amplified signal at the 1st IF amplifier Q112 is led to the demodulator pin 24 of IC105. The

16、signal of 12.8MHz from the reference buffer output of IC101 is multiplied by 3 in Q133. Then the signal is mixed with the signal of pin 1 of IC105 in the mixer circuit inside of IC105 and converted into the 2nd IF signal of 450kHz. The converted 2nd IF signal is output from pin 3 of IC105. FM The ou

17、tput signal from pin 3 of IC105 is led to pin 7 of IC105 after eliminating the adjacent channel signal at the ceramic filter FL103. The input 2nd IF signal to pin 7 of IC105 is demodulated at the limiter amplifier and quadrature detector circuits inside of IC105, then output from pin 12 of IC105 as

18、an AF signal. AM The output signal from pin 3 of IC105 is led to the pin 5 of IC105 after eliminat- ing the adjacent channel signal at the ceramic filter FL103. The 2nd IF signal input to pin 5 of IC105 is AM-demodulated inside of IC and output from pin 13 of IC105 as an AF signal. The 1st IF amplif

19、ier Q112 is controlled by reverse AGC at AGC amplifier Q117 to get better audio output even though the input is changed, and the gain is controlled. WFM The output signal from pin 3 of IC105 is led to pin 7 of IC105. The input 2nd IF signal to pin 7 of IC105 is demodulated at the limiter amplifier a

20、nd quadrature detector circuits inside of IC, then output from pin 12 of IC105 as an AF signal. 5. Squelch The AF signal got from pin 12 of IC105 is fed to pin 19 of IC105. The input signal is output from pin 21 of IC105 passing through the noise filter amplifier and rectifier circuits inside of IC.

21、 The rectified signal is added to the A/D port of the microcomputer IC1. Judging the signal, the microcomputer controls ON/OFF of the audio output. 5 6. Audio FM/AM/WFM The selection of receiving audio output signal between FM/WFM and AM is performed at IC106. The volume of output audio signal is ad

22、justed at the electronic volume IC108 via the AF amplifier Q120. After converting the im- pedance of the signal whose volume is adjusted at Q124, the signal is input to pin 2 of audio power amplifier IC110 and output from pin 6 to drive a speaker, etc. 7. VCO The 1st Local The VCO for the 1st local

23、consists of the Colpitts oscillator. D106, D108 and L105 determine the frequency, and they are oscillated at the transistor Q103. The oscillated signal is added to pin 2 of PLL-IC101 through the butter ampli- fiers Q105 and Q134. The 2nd Local The VCO for the 2nd local consists of the Colpitts oscil

24、lator. D110, D111 and L113 determine the frequency, and they are oscillated at the transistor Q110. The oscillated signal is added to pin 19 of PLL-IC101 through the butter am- plifier Q135. 8. PLL PLL-IC101 is used to control the oscillation frequency of VCO. The micro- computer IC1 sends the signa

25、l with serial data to control IC101. The 12.8 MHz reference frequency of IC101 oscillates the crystal oscillator X101 at the inside circuit. The 1st Local Using the control signal from IC1, IC101 compares the divided value of the added signal to pin 2 of IC101 with the divided value of 12.8 MHz refe

26、rence frequency inside IC101. When the phase difference is occurred, IC101 out- puts the pulse signal from pin 8 and converts into DC voltage at the active filter Q107 and Q108. Then it is fed to the cathode of the VCO vari-cap diodes of D106 and D108 to reduce the phase difference. This brings the

27、stable oscilla- tion at the desired frequency. The 2nd Local Using the control signal from IC1, IC101 compares the divided value of the added signal to pin 19 of IC101 with the divided value of 12.8 MHz reference frequency inside IC101. When the phase difference is occurred, IC101 out- puts the puls

28、e signal from the charge pump output pin 13 and converts into DC voltage at the inside circuit for the active filter. Then it is fed to the cathode of the VCO vari-cap diodes of D110 and D111 to reduce the phase difference. This brings the stable oscillation at the desired frequency. 6 2) M38224M6M

29、(E:XA0728, T:XA0729) CPU Terminal Connection (TOP VIEW) 7 3) Terminal function of CPU No.TerminalSignalI/ODescriptionNo.TerminalSignalI/ODescription 1AN7BPNC41P15P1COPLL 1ch SW 2AN6BATTIBattery input42P14DBCODoubler SW 3P65PCNT043P13ASWOWhip antenna SW 4AN4SMTIS-meter input44SEG26SEG26O 5AN3SQLISque

30、lch input45SEG25SEG25O 6P62AFPCOAF power supply46SEG24SEG24O 7P61BND3OBand3 SW47SEG23SEG23O 8P60BND2OBand2 SW48SEG22SEG22O 9P57RCORX SW49P05SCTOSecret SW 10P56BND4OBand4 SW50SEG20SEG20O 11P55BND5OBand5 SW51SEG19SEG19O 12P54BND1OBand1 SW52P02EAROEarphone antenna SW 13P53DATA/ULI/OData/Unlock53SEG17SE

31、G17O 14P52STB2ODAC strobe54SEG16SEG16O 15P51CLKOClock55SEG15SEG15O 16P50STB1OPLL strobe56SEG14SEG14O 17P47ATTOATT SW57SEG13SEG13O 18P46P2COPLL 2ch SW58SEG12SEG12O 19TXDCTXOClone TX59SEG11SEG11O 20RXDCRXIClone RX60SEG10SEG10O 21P43BEEPOBeep output61SEG9SEG9O 22INT0BUIBackup interrupt62SEG8SEG8O 23P41

32、UPIKey input63SEG7SEG7O 24P40DOWNIKey input64SEG6SEG6O 25RESETRESETIReset interrupt65SEG5SEG5O 26P71SDAI/OEEPROM data66SEG4SEG4O 27P70SCKOEEPROM clock67SEG3SEG3O 28XINXINIClock input68SEG2SEG2O 29XOUTXOUTOClock output69SEG1SEG1O 30VSSGND70SEG0SEG0O 31P27KEY8IKey input71VCCVDD 32P26KEY7IKey input72VR

33、EFVDD 33P25KEY6IKey input73AVSSGND 34P24KEY5IKey input74COM3COM3O 35P23KEY4IKey input75COM2COM2O 36P22KEY3IKey input76COM1COM1O 37P21KEY2IKey input77COM0COM0O 38P20KEY1IKey input78VL3VL3I 39P17BND6OBand6 SW79VL2VL2I 40P16PLLCOPLL power supply80VL1VL1I 8 SEMICONDUCTOR DATA 1) NJM2070M (XA0210) 2) uPD

34、3140GS-E1 (XA0312) 80 550MHz Dual PLL Synthesizer Specifications Operating frequency:200 400MHz (Vin=-12 -0dBm, pin 2 and 19 input) 80 550MHz (Vin=-8 -0dBm, pin 2 and 19 input) Consumption current:2.7 4.1mA (Vcc=1.8V while 1 channel is used) 4.3 6.6mA (Vcc=1.8V while both channels are used) 0 10uA (

35、Vcc=1.8V in power save mode) 3.5 5.3mA (Vcc=5V while 1 channel is used) 5.6 8.6mA (Vcc=5V while both channels are used) Operationg voltage:1.8 5.5V 9 3) TC4W53FU (XA0348) 10 4) S-80730SL-AT (XA0356) 5) M5222FP-600C (XA0385) Electronic Volume 11 6) XC62SPR332MR (XA0519) 7) NJM2904V (XA0573) Dual Sing

36、le Supply Operational Amplifer 12 8) MB88347LPFV-G-BND-EF (XA0599) D/A converter for digital tuning 13 9) TK11816M (XA0665) 6 5 4 1 2 3 VIN DK VOUT Pin Assignment Block Diagram 5 6 4 12 3 VIN GND OSC DK VOUT T1 Feed back control Ref. Voltage Start-up Circuit Oscillator VIN OSC DK 10) TK10931V (XA066

37、6) 123456789101112 242322212019181716151413 AM DET RSSI RECT COMP AMP AGC Vref Vcc AM AMP FM AMP FM DET MIXER OSC RF INPUT GND COMP OUTPUT COMP INPUT NOISE AMP OUTPUT NOISE AMP INPUT AM AGC INPUT AGC AMP OUTPUT RF AGC OUTPUT RSSI OUTPUT AM SW AM DET OUT OSC(B) OSC(E) MIX OUTPUT Vcc AM IF INPUT DECOU

38、PLING FM IF INPUT DECOUPLING DECOUPLING LIM OUTPUT QUAD INPUT FM DET OUTPUT Pin Assignment / BLOCK Diagram (Top View) 14 11) TA4101F TE12L (XA0667) 1234 8765 1. IF OUT 2. Vcc 3. OSC IN 4. BASE 5. BASE 6. BASE 7. GND 8. COLLECTOR Pin AssignmentBlock Diagram 23 R1 RB1 RB2 RB3 RB4 R2 R3 Q1Q2Q3Q4 Q5R4Q6

39、 3 RE1RE2 8 1 4 6 7 RL1RL2 12) S-80829ALNP-EAS-T2 (XA0668) 12 34 1 OUT 2 VDD 3 NC 4 VSS Top view Pin Assignment Block Diagram VDD VCC OUT VREF 15 13) BR24C64F-E2 (XA0669) 1 2 3 4 A0 A1 A2 GND Vcc WP SCL SDA 8 7 6 5 13bit 8bit 64Kbit EEPROM ARRAY ADDRESS DECODER SLAVEWORD ADDRESS REGISTER DATA REGIST

40、ER CONTROL CIRCUIT VOLTAGE DETECTOR HIGH VOLTAGE GENERATOR 13bit ACK STOPSTART Block Diagram Pin Assignment VccWPSCLSDA A0A1A2GND BR24C64/F 16 14) uPC2757T-E3 (XA0743) 3 2 1 4 5 6 Terminal Connection Block Diagram C1X (Top View) 4 5 6 3 2 1 (Bottom View) 1: RF input 2: GND 3: Lo input 4: PS (Power S

41、ave) 5: Vcc 6: IF output RF input IF output Lo input VccGND POWER SAVE 17 15) Transistor, Diode and LED Outline Drawings TX N MC3 K B L L M 2 Y R A M AV Y K Y 6 RO 3 1SV308(TPH3) XD0339 MA2S728-TX XD0315 DAN235E-TL XD0320 MA2S357-TX XD0337 ISS362 TE85L XD0338 SML-310MTT86 XD0036 ISS390 TE61 XD0342 M

42、A2S30400L XD0312 2SC4738BL(TE85R) XT0181 2SC5066FT-Y(TE85L) XT0180 2SD2216R-TX XT0135 2SC4618TL XT0172 2SC5096FT-O(TE85L) XT0182 2SJ144Y(TE85R) XE0019 UMC5N TR XU0152 XP1111-TX XU0171 UN911H TX XU0092 DTC143TE TL XU0196 2SK881Y(TE85R) XE0036 18 16) LCD connection LCD Common LCD Segment 19 EXPLODED V

43、IEW 1) Front View FCPR0452 AP0027 AX0005 FG0309 KZ0106 DK0137 LCD CPU unit PR0452 (*T) 20 2) Rear View FP0154 NS0007 AN0027 FM0186 FG0229Z ED0008A UT0042 FP0122 TS0160 ES0020 YX0023 MRCLH9GG MBCLH9GG UE0395 FP0157 FM0185 EA0082 YX0025 TN0008 FP0116 PR0447 (*T) PR0309 (*E) DS0388A (*E) DS0419 (*T) KB

44、0079 FG0311 AX0005 21 PARTS LIST Ref.Ref. No.No. C118CU3547Chip C.GRM36B103K16PT YX0004TAPE C119CS0396Chip TantalTMCP1D104MTR C1CU3535Chip C.GRM36B102K50PT C120CU3501Chip C.GRM36CK0R5C50PT C2CU3111Chip C.C1608JB1C104KT-N C121CU3547Chip C.GRM36B103K16PT C3CU3111Chip C.C1608JB1C104KT-N C122CS0408Chip

45、Tantal6MCM156MATER C300CS0403Chip TantalTMCP1D224MTR C123CU3523Chip C.GRM36CH101J50PT C4CU3547Chip C.GRM36B103K16PT C124CU3535Chip C.GRM36B102K50PT C5CU3517Chip C.GRM36CH330J50PT C125CS0397Chip TantalTMCP1C105MTR C6CU3517Chip C.GRM36CH330J50PT C126CU3535Chip C.GRM36B102K50PT C7CS0398Chip TantalTMCP0J225MTR C127CS0396Chip TantalTMCP1D104MTR C8CU3111Chip C.C1608JB1C104KT-N C128CS0397Chip TantalTMCP1C105MTR C9CS0398Chip TantalTMCP0J225MTR C