Alinco_DJ-S446_serv.pdf

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1、DJ-S446 Service Manual CONTENTS SPECIFICATIONS 1) GENERAL . 2 2) TRANSMITTER . 2 3) RECEIVER . 2 CIRCUIT DESCRIPTION 1) Receiver System. 3 2) Transmitter System . 4 3) PLL, VCO Circuit. 4 4) M38224M6M . 5 SEMICONDUCTOR DATA 1) M64082AGP (XA0543) . 7 2) NJM2070MT1 (XA0210) . 8 3) NJM2904V (XA0573). 8

2、 4) NJM2902V-TE1 (XA0596) . 9 5) TA31136FN (XA0404). 9 6) UPC2771T (XA0545). 10 7) CAT24WC16JITE13 (XA0855). 10 8) S-816A30AMC (XA0848). 10 9) S-80827ALNP (XA0857). 11 10) Transistor, Diode and LED Outline Drawings. 12 11) LCD Connection . 13 EXPLODED VIEW 1) Front View. 14 2) Bottom View. 15 PARTS

3、LIST MAIN Unit . 1619 UP0473 Unit . 19 PTT Unit . 19 Mechanical Parts . 20 Packing. 20 ADJUSTMENT. 2122 PC BOARD VIEW 1) UP0446A (1/2) side A . 23 2) UP0446A (1/2) side B . 24 3) PTT Unit WIRING . 25 4) UP0473 TOP VIEW / WIRING . 26 SCHEMATIC DIAGRAM. 27 BLOCK DIAGRAM. 28 ALINCO,INC. 2 SPECIFICATION

4、S 1) GENERAL Frequency coverageTX/RX 446.00625 446.09375MHz (DJ-S446E) (CH - 1 CH - 8) TX/RX 446.03125 446.09375MHz (DJ-S446F) (CH - 1 CH - 6) ModeF3E (FM) Channel steps12.5kHz Memory channels99 channels+1 CALL channel Frequency stability 5 ppm Microphone impedance2k nominal Power supply4.5 16.0V DC

5、 (EXT.termonai) 3.6 16.0V DC (BATT terminal) Current500mA (typical) Transmit 150mA (typical) Receive at 280mW 40mA (typical) standby 15mA (typical) Battery save on Usable temperature range-10 +60C (14 140F) Dimensions56 (W) 102 (H) 30 (D) mm (with EDH-31) 2.2(W) 4.0(H) 1.18(D) inches (with EDH-31) (

6、Projections not included) WeightApprox. 160g (5.6oz) (with EBP-53N) Approx. 95g (3.3oz) (without Battery) Sub audible Tone(CTCSS) encoder/decoder installed (38tones) 2) TRANSMITTER Output power500mW Modulation systemVariable reactance frequency modulation Max. frequency deviation2.5kHz 3) RECEIVER R

7、eceive systemDouble conversion superheterodyne Intermediate frequencies1st 21.7MHz / 2nd 450kHz Sensitivity(12dB SINAD)-14.0dB (0.2uV) or less Audio output power280mW or higher(8 load) 200mW (8 10% THD) 3 CIRCUIT DESCRIPTION 1) Receiver System The receiver system is a double superheterodyne system w

8、ith a 21.7MHz first IF and a 450kHz second IF. 1. Front End The signal from the anntena is pssed through low-pass filter and input to RF coil L24 and L17(band pass filter). The signal from L24 and L17 is amplified by Q9,Q10 and led to the band pass filter, and let to the first mixer base of Q11. 2.

9、First Mixer The amplified signal (f0) by Q9,Q10 is mixed eith the first local oscillator signal(f0-21.7MHz) from the PLL circuit by the first stage mixer Q11 and so is converted into the first IF signal. The unwanted frequency band of the first IF signal is eliminated by the monolithic crystal filte

10、r FL3,and led to IF amplifier Q8. 3. IF Circuit The first IF signal is amplified by Q8, and input to pin 16 of IC3, where it is mixed withthe second local oscillator signal(21.25MHz)and so is converted into the second IF signal(450kHz). The second IF signal is output from pin3 of IC3, and unwanted f

11、requency band of second IF signal is eliminated by a ceramic filter FL2. The resulting signal is then amplified by the second IF limiting amplifier, and detected by quadrature circuit. the audio signal is output from pin9 of IC3 4.Audio Circuit The demodulated signal in IF IC3 contains the audio sig

12、nal and CTCSS signal . CTCSS signal is passed through the low-pass filter of IC5 and led to TIN port of CPU to be decoded. The audio signal is input to the main volume VR3 passing through de-emphasis circuit and high-pass filter circuit of Q19.The signal of which level is adjusted at the main volume

13、 VR3 is input to IC6 of AF amp, then it is amplified to the level that can drive the speaker. 5.Squelch Circuit The noise in the audio signal from IC3 is passed through the noise-filter and input to pin8 of IC3. IC3 includes filter amplifier,high-pass filter and rectifier. The rectified voltage leve

14、l from pin14 of IC3 is deliverd to the comparator of the CPU. The voltage is led to pin1 of CPU and compared with the setting voltage.The squelch will open if the input voltage is lower than the setting voltage. During open squelch ,pin11(AFS)of CPU becomes”H”level and pin9(AFP)of CPU becomes”L”leve

15、l, AF control signal is being controlled and sounds is outputted from the speaker. 4 2)Transmitter System 1.Microphone Amplifier The input signal from built-in or external microphone is led to the microphone mute circuit Q15,pre-emphasis circuit ,IDC circuit IC4,the signal is input to the maximum de

16、viation adjustment volume VR2.Then mixed at the add VR2 with the CTCSS tone signal which is generated by CPU,Then it is input to VCO as the modulation signal. 2.Power Amplifier The signal from VCO is amplified by IC1 and then passed through the low-pass filter, the antenna switch circuit and the out

17、put low-pass filter. The unwanted harmonics frequency signal is eliminated by the low-pass filter and input to the antenna. 3)PLL,VCO Circuit Output frequency of PLL circuit is set by the serial data from microprocessor. PLL circuit consists of VCO Q2,buffer amplifier Q6. The pulse wave output of ch

18、age pump is converted to DC voltage by PLL loop filter circuit,snd supplied to D2,D15 of varicap diode in VCO unit. The frequency modulation is executed when audio signal voltage is supplied to the varicap D3. When PLL is unlocked,pin10 of IC2 goes to “High”. 5 4) M38224M6M CPU Terminal Connection (

19、TOP VIEW) 6 Terminal function of CPU No. Pin Name FunctionI/OLogicDescriptionNo. Pin Name FunctionI/OLogicDescription 1P67SQLIA/DNoise level input for squelch 2P66KEYIA/DKey input (,V/M) 3P65VOXOActiv highPower cont. 4P64EXTDCIA/DExt voltage input 5P63BP1IA/DBand plan 1 6P62TINIA/DCTCSS tone input 7

20、P61SMTIA/DS-meter input 8P60BATTIA/DBatt voltage input 9P57AFPOActiv lowAudio Amp ON/OFF 10P56BEEPI/O PulseBeep sound out 11P55AFSOActiv highAudio signal ON/OFF 12CNTR0TBSTI/O PulseArt tone output 13P53BP3IBand plan 3 14P52MONIIActiv lowMonitor key input 15P51PSWIActiv lowPower switch input 16P50STB

21、OPulseStrobe for PLL 17P47DATAI/O PulseData for PLL 18P46CLKOPulseClock for PLL 19TxDCTXOPulseUART data transmission output 20RxDCRXIPulseUART data reception input 21P43SCRIActiv highAlarm signal input 22INTOBUIActiv lowBack up signal detection input 23P41PTTKIActiv highPTT signal input 24P40BP4IAct

22、iv highBand plan 4 25RESETRESETIActiv lowReset input 26P71SCLOPulseSerial clock for EEPRPM 27P70SDAI/O PulseSerial data for EEPRPM 28XinXINI 29XoutXOUTO 30VssGNDCPU GND 31P27MMUTEOActiv highMicrophone mute output 32P26H/LOActiv highPower control high=H 33P25EXPOActiv lowEXP terminal control 34P24FUN

23、CIActiv lowFunc key input 35P23PTTCOActiv highBeep sound level control 36P22P3COActiv lowPower supply control for VCO output 37P21C3COActiv highPower supply control 38P20R3COActiv lowPower supply control for RX 39P17T3COActiv lowPower supply control for TX 40P16TON4OActiv highTone output 4 41P115TON

24、3OActiv highTone output 3 42P14TON2OActiv highTone output 2 43P13TON1OActiv highTone output 1 44SEG26SEG22OLCD SEG 22 45P115SHIFTOActiv highVCO shift output TX=H 46P10LAMPCOActiv highLamp ON/OFF output 47SEG23SEG21OLCD SEG 21 48SEG22SEG20OSEG 20 49SEG21SEG19OSEG 19 50SEG20SEG18OSEG 18 51SEG19SEG17OS

25、EG 17 52SEG18SEG16OSEG 16 53P01CHGOActiv highBattery charge control 54P00MICCOActiv lowTX mic amp power supply outout 55SEG15SEG15OSEG 15 56SEG14SEG14OSEG 14 57SEG13SEG13OSEG 13 58SEG12SEG12OSEG 12 59SEG11SEG11OSEG 11 60SEG10SEG10OSEG 10 61SEG9SEG9OSEG 9 62SEG8SEG8OSEG 8 63SEG7SEG7OSEG 7 64SEG6SEG6O

26、SEG 6 65SEG5SEG5OSEG 5 66SEG4SEG4OSEG 4 67SEG3SEG3OSEG 3 68SEG2SEG2OSEG 2 69SEG1SEG1OSEG 1 70SEG0SEG0OSEG 0 71VccVDD 72VrefVDD 73AvssGND 74COM3COM3OLCD COM 3 75COM2COM2OLCD COM 2 76COM1COM1OLCD COM 1 77COM0COM0OLCD COM 0 78VL3VL3ILCD power supply 79VL2VL2ILCD power supply 80VL1VL1ILCD power supply 7

27、 SEMICONDUCTOR DATA 1) M64082AGP (XA0543) DUAL PLL FREQUENCY SYNTHESIZER 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 M64082AGP SI Xin Xout GND CONT Fin2 Vcc PD1 RST CPS Lock XBo Vss PD2 Vc1 Fin1 1121413 9 10 8 7 15 16 11 6 2 3 45 Vcc Fin1 CONT Xin Xout XBo SI RST CPS Fin2 GNDVc1 PD2 Vss Lock PD1 Programm

28、able divider for local oscillator 1 Data latch (17 bits) latch Phase comparator 21 pulse counter OSC 1/2 divider 1/4 divider through 2-modulus prescaler (1/128, 1/129) 2-modulus prescaler (1/128, 1/129) Shift register (21 bits) Buffer Programmable divider for local oscillator 2 Data latch (17 bits)

29、Data latch (11 or 17 bits) Programmable divider for reference frequency Phase comparator Charge pump Lock detection Charge pump 8 2) NJM2070MT1 (XA0210) Low Voltage Power Amplifier Equivalent Circuit 3) NJM2904V (XA0573) 9 4) NJM2902V-TE1 (XA0596) Quad Single Supply Operational Amplifier 5) TA31136F

30、N (XA0404) Low Power FM IF 10 6) UPC2771T(XA0545) Terminal Connection (Top View) C2H 3 2 1 4 5 6 1: INPUT 2: GND 3: GND 4: OUTPUT 5: GND 6: Vcc 7) CAT24WC16JITE13 (XA0855) A0 A1 A2 VssSDA SCL WP VccNameFunction VssGround A0.A2User Configurable Chip Selects SDASerial Address/Data I/O SCLSerial Clock

31、WPWrite Protect Input Vcc2.5V6.0V Power Supply PDIP 8) S-816A30AMC (XA0848) 41 3 2 5 OUT R = 0.3 IN CL EXT IN V ON/OFF OUT V SS V S-816A SOT-23-5 Top view 1 54 23 MC 11 9) S-80827ALNP (XA0857) 12 34 1 OUT 2 VDD 3 NC 4 VSS Top view Pin Assignment Block Diagram VDD VCC OUT VREF 12 10) Transistor, Diod

32、e and LED Outline Drawings 2SA1576A XT0094 1SV307(TPH3) XD0326 2SC4081 T106R XT0095 2SB766A-TX XT0170 2SC4808-TX. AR XT0171 2SA1036K T146Q XT110 2SC4618TLP XT0172 TX FR C BE 2SC5066-O(TE85L) XT0138 2SK3074 XE0044 2SD2216R-TX XT0135 DA204U XD0130 M1FE 40400V1A XD0368 ISV311(TPL3) XD0344 HSU277TRF XD3

33、31 WA GDS K V1 SML-310MTT86 XL0036 RN2107 TE85L XU0192 RN1107 TE85L XU0193 MA729-TX XD0291 MA2S728-TX XD0315 MA741WA TX XD0251 B UMC5N TR XU0152 XP1114 (TX) XU0161 XP1501-TX XU0172 13 11) LCD connection Pin NoCOM0COM1COM2COM3 1COM0- 2-COM1- 3-COM2- 4-COM3 5DEFC 6HIJG 7LMNK 8POVW 9RSUT 109c9b9aY 119e

34、9g9f9d 128c8b8aX 138e8g8f8d 147c7b7aZ 157e7g7f7d 166c6b6a6h 176e6g6f6d 185c5b5aQ 195e5g5f5d 204c4b4a4h 214e4g4f4d 223c3b3aB2 233e3g3f3d 242c2b2aB1 252e2g2f2d 261c1b1aA 271e1g1f1d 14 EXPLODED VIEW 1) Front View TL0027 UP0446 TN0014 FG0330 DG0040 TL0026 EL0053 ST0069 KZ0140 UR0023 TZ0088 YX0032 DP0139

35、 15 2) Bottom View NK0077 SP0013 AN0012 FG0337 FG0332 FG0334 EA0099 AX0008 AX0005 FG0331 ES0025 FP0182 AF0025 TS0165 SD0093A FG0346 SD0092A FG0329 RED(MRCL04AA) BLUE(MACL04AA) UP0446 FG0345 FG0336 AF0031 KZ0139 AE0034 AZ0044 FM0197 FG0333 FG0324 16 PARTS LIST MAIN Unit Ref. No.EF UP0446APC BoardDJS4

36、0CQ INTEGRATED11 C1CU3531Chip C.GRM36B471K50PT11 C2CU3547Chip C.GRM36B103K16PT11 C3CU3531Chip C.GRM36B471K50PT11 C4CU3531Chip C.GRM36B471K50PT11 C5CU3547Chip C.GRM36B103K16PT11 C6CU3535Chip C.GRM36B102K50PT11 C7CS0408Chip tantalum6MCM156MATER11 C8CU3511Chip C.GRM36CH100D50PT11 C10CU3531Chip C.GRM36B

37、471K50PT11 C11CU3010Chip C.C1608CH1H090CT-A11 C12CU3531Chip C.GRM36B471K50PT11 C14CS0411Chip tantalum4MCM226MATER11 C15CU3531Chip C.GRM36B471K50PT11 C16CU3531Chip C.GRM36B471K50PT11 C17CU3531Chip C.GRM36B471K50PT11 C18CU3531Chip C.GRM36B471K50PT11 C19CU3531Chip C.GRM36B471K50PT11 C20CU3531Chip C.GRM

38、36B471K50PT11 C21CU3008Chip C.C1608CH1H070CT-A11 C22CU3531Chip C.GRM36B471K50PT11 C23CU3507Chip C.GRM36CH060D50PT11 C24CU3531Chip C.GRM36B471K50PT11 C25CU3531Chip C.GRM36B471K50PT11 C26CU3505Chip C.GRM36CH040C50PT11 C27CU3511Chip C.GRM36CH100D50PT11 C28CU3508Chip C.GRM36CH070D50PT11 C29CU3511Chip C.

39、GRM36CH100D50PT11 C30CU3111Chip C.C1608JB1C104KT-N11 C31CU3502Chip C.GRM36CK010C50PT11 C34CU3501Chip C.GRM36CK0R5C50PT11 C35CU3503Chip C.GRM36CK020C50PT11 C36CU3515Chip C.GRM36CH220J50PT11 C37CU3514Chip C.GRM36CH180J50PT11 C38CU3509Chip C.GRM36CH080D50PT11 C39CU3111Chip C.C1608JB1C104KT-N11 C40CU350

40、2Chip C.GRM36CK010C50PT11 C41CU3503Chip C.GRM36CK020C50PT11 C42CU3503Chip C.GRM36CK020C50PT11 C43CU3502Chip C.GRM36CK010C50PT11 C45CU3535Chip C.GRM36B102K50PT11 C46CU3101Chip C.C1608JB1C473KT-NS11 C47CS0406Chip tantalum35MCM105MATER11 C48CU3505Chip C.GRM36CH040C50PT11 C49CU3535Chip C.GRM36B102K50PT1

41、1 C50CU3111Chip C.C1608JB1C104KT-N11 C51CU3531Chip C.GRM36B471K50PT11 C52CU3531Chip C.GRM36B471K50PT11 C53CU0108Chip C.LMK212BJ105KG11 C54CU3531Chip C.GRM36B471K50PT11 C55CU3523Chip C.GRM36CH101J50PT11 C56CU3520Chip C.GRM36CH560J50PT11 C57CU3516Chip C.GRM36CH270J50PT11 C58CU3511Chip C.GRM36CH100D50P

42、T11 C59CU3535Chip C.GRM36B102K50PT11 C60CU3531Chip C.GRM36B471K50PT11 C61CU3535Chip C.GRM36B102K50PT11 C62CU3547Chip C.GRM36B103K16PT11 Parts No.DescriptionParts Name VersionRef. Version No.EF C63CU3547Chip C.GRM36B103K16PT11 C64CU3111Chip C.C1608JB1C104KT-N11 C65CS0367Chip tantalumTMCMA0J106MTR11 C

43、66CU3531Chip C.GRM36B471K50PT11 C67CU3531Chip C.GRM36B471K50PT11 C68CU3547Chip C.GRM36B103K16PT11 C69CU3527Chip C.GRM36CH221J25PT11 C70CU3504Chip C.GRM36CJ030C50PT11 C71CU3504Chip C.GRM36CJ030C50PT11 C72CU3504Chip C.GRM36CJ030C50PT11 C73CU3503Chip C.GRM36CK020C50PT11 C74CU3502Chip C.GRM36CK010C50PT1

44、1 C75CU3503Chip C.GRM36CK020C50PT11 C76CU3503Chip C.GRM36CK020C50PT11 C77CU3502Chip C.GRM36CK010C50PT11 C78CU3547Chip C.GRM36B103K16PT11 C79CU3510Chip C.GRM36CH090D50PT11 C80CU3503Chip C.GRM36CK020C50PT11 C81CU3508Chip C.GRM36CH070D50PT11 C82CU3527Chip C.GRM36CH221J25PT11 C83CU3531Chip C.GRM36B471K50PT11 C84CU3503Chip C.GRM36CK020C50PT11 C85CU3515Chip