Alinco_DJ-G29T_serv.pdf

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1、 DJ G29T Service Manual CONTENTS S SPECIFICATIONS General Transmitter. Receiver. CIRCUIT DESCRIPTION 1) Reception 2) Transmission. 3) CPU SEMICONDUCTOR DATA 1) BU4094BCFV (XA0506) 2) NJM2070M (XA0210). 3) TC4W53FU (XA0348). 4) NJM2125F (XA0622) 5) TK10931V (XA0666). 6) uPC2771TB (XA0953) . 7) uPC275

2、7TB (XA0976). 8) BD4930FVE (XA1009). 9) MB15F07SL (XA1033). 10) MM1332EF (XA1139). 11) AT24C51210 (XA1184). 12) M62364FP (XA1293). 13) S-812C32AMC (XA1353). 14) LM2681 (XA1354) 15) NJM12904RB1 (XA1355) 16) NJM2746RB1 (XA1356) 17) BA2902FV (XA1371) 18) NJM2591V (XA1391) 19) Transistor, Diode and LED

3、Outline Drawings 20) LCD Connection (EL0063) EXPLODED VIEW 1) Front View. 2) Rear View. 3) Bottom View. 2 2 3 4-7 7 8-11 12 13 13 13 14 14 15 15 15 15 16 16 16 17 17 17 17 18 18 19 20 PARTS LIST CPU Unit. MAIN Unit. Mechanical Unit. Packing Unit. ADJUSTMENT 1) How to enter the adjustment mode. 2) Ho

4、w to select the adjustment item. 3) How to change the Squelch. 4) How to transmit the Tone Burst. 5) Standard Measuring Condition. Adjustment Points Adjustment Specification. PC BOARD VIEW. SCHEMATIC DIAGRAM. BLOCK DIAGRAM. ALINCO, INC. SPECIFICATIONS General Frequency range: TX(Main band): 222.000

5、224.995MHz 902.000 927.995MHz RX(Main/Sub band): 216.000 249.995MHz 902.000 927.995MHz Antenna impedance: 50 ohm(SMA) Supply voltage: DC 7.4V(EBP-73 Li-ion battery pack) DC 916V(external regulated source) Ground: Negative ground Current consumption: - TX approx. 1.7A/222MHz, 1.7A/902MHz - RX approx.

6、 200mA/Dual, 150mA/Mono - Battery save (1:4) approx. average: Dual 56mA/Mono50mA Temperature range: -10+45 (+14+113F) Frequency stability: +2.5ppm(-10 - +45) Dimensions (WxHxD Projections exclusive): 61 x 106 x 38 mm or 2.40 x 4.17 x 1.50 in. Weight (Antenna/EBP-73 inclusive): Approx. 296g /9.55 oz

7、Transmitter Output power (approx): - DC13.8V:222MHz 5/1/0.4W, 902MHz 2.5/1/0.4W - EBP-73:222MHz 4/0.8/0.3W, 902MHz 1.7/0.8/0.3W Modulation mode: F1D/F2D/F3E Spurious emission: -60dB or less Maximum frequency deviation: 5kHz Receiver System: Double-conversion super heterodyne IF frequencies(1st/2nd):

8、 Main band: 51.65MHz / 450kHz Sub band: 50.75MHz / 450kHz Sensitivity: Main band: 222MHz ham-radio bands 14dB 902MHz ham-radio bands 14dB Sub band: 222MHz ham-radio bands 14dB 902MHz ham-radio bands 14dB Selectivity: -6dB 12kHz or more / -60dB 35kHz or less Audio output power: More than 400mW (8/MAX

9、) CIRCUIT DESCRIPTION 1) Reception FM: Double Super Heterodyne Method 1st IF: Main band 51.65 MHz Sub band 50.75 MHz 1. RX Method 2nd IF: 450 kHz 2. Front End 2-1. 216 249.995MHz (MAIN) The receiving signal is passed through the band-pass filer (C378, C405, C406, C406, C407, C415, C530, L223, L231,

10、L259), and amplified in RF fast amplifier (Q234). The amplified signal is led to band pass filter (C396, C397, C399, C404, C411, C412, L255, L256), and then input to the mixer IC204 2-2. 902 927.995MHz (MAIN) The receiving signal is passed through the band-pass filer (C497, C498, C499, L254, L283, L

11、284), and amplified in RF fast amplifier (Q250). The amplified signal is led to band pass filter (C486, C488, L293, FL202) and amplified in RF second amplifier (Q258). The amplified signal is led to high pass filter (C524, C525, L292), and then input to the mixer IC204 2-3. 216 249.995MHz (SUB) The

12、receiving signal is passed through the band-pass filer (C378, C405, C406, C406, C407, C415, C530, L223, L231, L259), and amplified in RF amplifier (Q234). The amplified signal is led to band pass filter (C418, C419, C420, C421, C429, C430, C432, C433, C434, C435, C436, L261, L262, L264, L265), then

13、input to the mixer IC206 2-4. .902 927.995MHz (SUB) The receiving signal is passed through the band-pass filer (C497, C498, C499, L254, L283, L284), and amplified in RF amplifier (Q250). The amplified signal is led to band pass filter (C508, C510, C258, L288, FL205) and amplified in RF second amplif

14、ier (Q256). The amplified signal is led to high pass filter (C511, C512, L290), and then input to the mixer IC206 3.ATT This circuit is used in case the receiving signal is disturbed by interfering signal, attenuating the receiving signal to reduce the interference. CPU (IC3) pin 30, 31 and 32 outpu

15、ts a DC voltage to drive IC14, then ATTV on MAIN unit controlling D207 and D242. The serial resistor with diodes adjusted the attenuation value. 4 Mixer 4-1. Main Mixer The input signal to the mixer IC204 and the 1st local signal are added or, then it is amplified at the 1st IF amplifier Q216 after

16、the adjacent signal subtracted at mixer IC204, and the crystal filter XF201 selects the signal of 51.65MHz is eliminated. 4-2. Sub Mixer The input signal to the mixer IC206 and the 1st local signal are added or, then it is amplified at the 1st IF amplifier Q225 after the adjacent signal subtracted a

17、t mixer IC206, and the crystal filter XF202 selects the signal of 50.75MHz is eliminated. 5. IF 5-1. Main IF The signal amplified at the 1st IF amplifier Q216 is supplied to pin 16 of IC205 for demodulation. Also the signal of 12.8MHz pass through Q213 and Q214 and 51.2MHz (12.8MHz X 4) led to pin 1

18、 of IC205. 2 input signals on pin 16 and 1, are mixed in the mixer circuit inside IC205 and converted into the 2nd IF signal of 450kHz. The converted 2nd IF signal is output from pin 3 of IC205. The output signal from pin 3 of IC205 is led to pin 5 of IC205 after eliminating the adjacent channel sig

19、nal at the ceramic filter FL201. The input 2nd IF signal to pin 5 of IC205 is demodulated at the limiter amplifier and quartered detector circuits inside of IC205, then output from pin 9 of IC205 as an AF signal. 5-2. Sub IF The signal amplified at the 1st IF amplifier Q225 is supplied to pin 24 of

20、IC208 for demodulation. Also the signal of 12.8MHz pass through Q213 and Q214 and 51.2MHz (12.8MHz X 4) led to pin 1 of IC208. 2 input signals on pin 24 and 1, are mixed in the mixer circuit inside IC208 and converted into the 2nd IF signal of 450kHz. The converted 2nd IF signal is output from pin 3

21、 of IC208. The output signal from pin 3 of IC208 is led to pin 7 of IC208 after eliminating the adjacent channel signal at the ceramic filter FL204. The input 2nd IF signal to pin 7 of IC208 is demodulated at the limiter amplifier and quartered detector circuits inside of IC208, then output from pin

22、 12 of IC205 as an AF signal 6. Squelch 6-1. Main Squelch The AF signal got from pin 9 of IC205 is fed to pin 8 of IC205. The input signal is output from pin 14 of IC205 passing through the noise filter amplifier and rectifier circuits inside of IC205. The rectified signal (MSQL) is added to the A/D

23、(Pin109) port of the microcomputer IC3. Judging the signal, the microcomputer controls ON/OFF of the audio output. 6-2. Sub Squelch The AF signal got from pin 12 of IC208 is fed to pin 19 of IC208. The input signal is output from pin 21 of IC208 passing through the noise filter amplifier and rectifi

24、er circuits inside of IC208. The rectified signal (SSQL) is added to the A/D(Pin108) port of the microcomputer IC3. Judging the signal, the microcomputer controls ON/OFF of the audio output. 7. Audio The all AF signal are attracted to the IC10 on the CPU unit. The volume of output audio signal is ad

25、justed at the volume IC10 and the AF amplifier Q7. And then the signal is input to pin 2 of audio power amplifier IC5 to output pass through the audio SW Q12 from pin 6 to drive a speaker, etc. 8. VCO 8-1. Main VCO The Main VCO on oscillating frequency buffer amplifier Q602, oscillated signal is sup

26、plied to pin 4 of PLL-IC202 passing through the buffer amplifier Q201. The VCO in 222 band consists of the Colpitts oscillator. D604, D605, D606 and L602 determine the oscillating frequency, and the signal is oscillated at the transistor Q603. The VCO in 902 band consists of the Colpitts oscillator.

27、 D601, D607, D605, D609 and L603 determine the oscillating frequency, and the signal is oscillated at the transistor Q604. 8-2. Sub VCO The Sub VCO on oscillating frequency buffer amplifier Q702, oscillated signal is supplied to pin 13 of PLL-IC202. The VCO in 222 band consists of the Colpitts oscil

28、lator. D704, D706, and L703 determine the oscillating frequency, and the signal is oscillated at the transistor Q704. The VCO in 902 band consists of the Colpitts oscillator. D707, D709 and L705 determine the oscillating frequency, and the signal is oscillated at the transistor Q706. 9. PLL PLL-IC20

29、2 is used to control the oscillating frequency of the VCO. IC202 is controlled by the serial control signal (DATA, CLK, STB1) sent from the microprocessor IC3. The 12.8MHz reference frequency of IC202, supplied from crystal oscillates X201. IC202 compares the frequency gained by dividing the signal

30、added to pin 16 of IC3 by the control signal from IC3 with the frequency gained by dividing the reference frequency 12.8MHz. When the phase difference is found as a result of phase comparison, the pulse signal is output from the charge pump output of pin 8(Main band) and pin 9(Sub band) of IC202, th

31、en the signal is converted into the DC voltage at the passive filter and added to the cathode side of the VCO vari-cap D601, D604, D605, D606, D607, D608, D609, D704, D706, D707, D706 and D709 to make the phases equal. In result the stabilized oscillation can be done at the desired frequency. 2) Tra

32、nsmission 1. Microphone Amplifier The audio signal is converted to a mute switch (Q20) and microphone gain (Q24) Electric signal in either the internal or external microphone pass through and two operational amplifiers, then supplied to IC10. The voice is converted into the electric signal through t

33、he microphone, and then supplied to IC10. The input signal is amplified and pre-emphasized to be output. The signal output from microphone amplifier is adjusted the maximum frequency deviation at IC10. The adjusted signal is added to the cathode of the VCO vari-cap D605 and D608 for deviation to cha

34、nge the capacity of the oscillation circuit resulting the FM deviation. 2. Power Amplifier The VCO in 222 band oscillated signal of the VCO is supplied to the power amplifier Q202, passing through buffer amplifier Q602 on VCO unit and then pre-driver amplifier IC201, driver amplifier Q203. The power

35、-amplified signal is supplied to the antenna through the duplexer after the harmonics are attenuated enough. The VCO in 902 band oscillated signal of the VCO is supplied to the power amplifier Q210, passing through buffer amplifier Q602 on VCO unit then pre-driver amplifier IC201, driver amplifier Q

36、212. The power-amplified signal is supplied to the antenna through the duplexer after the harmonics are attenuated enough. 3) CPU Peripheral 1.Lamp The CPU pin 117, 118 and 119 outputs a DC current to drive IC6, controls. The brightness of the lamp can be adjusted by five stages lamp lights when ope

37、rating Lamp (D4, D5, D6, D7, D8, D8, D801, D802) lights when ten keys are operated. The lamp outputs by five stages and adjusts the DC current with CPU pin 117, 118 and 119 to IC6. 2. Tone/DCS/DTMF Encoder The CPU pin 7 is equipped with an internal tone/DCS/DTMF encoder. The tone signal (67.0 to 250

38、.3Hz) is output. The DCS code (023 to 754) is output. The DTMF code (1 to D) is output. 3. Tome/DCS Decoder The AF signal from the IC205 or IC208 is filtered by an active filter (IC2) signal amplified and input to pin 121 of the CPU 3) CPU M30625FG (XA1541) Terminal Connection (TOP VIEW) No. Termina

39、l Signal I/O Description 1 VREF VDD2 - Power supply 2 AVCC VDD2 - Power supply 3 P9_7 DCSW O DCS mute SW 4 P9_6 MUTE O Mute 5 P9_5 TDC O Tone mute SW 6 P9_4 TRKV O Front End control 7 P9_3 TDD Tone/DCS/DTMF output 8 P9_2 MSW I MONI SW 9 P9_1 XBR O Cross Band Repeater SW 10 P9_0 DTSW O Tone/DCS/DTMF

40、SW 11 P14_1 SCLK - Signal clock for EEPROM 12 P14_0 SDATA - Signal data for EEPROM 13 BATE GND - GND 14 CNVSS GND - GND 15 P8_7 TFSK O FSK output 16 P8_6 X SW O Clock shift output 17 RESET RST I Rest input 18 XOUT XOUT O Main clock output 19 VSS GND - GND 20 XIN XIN I Main clock input 21 VCC1 VDD -

41、Power supply 22 P8_5 VDS - Power supply 23 P8_4 RFSK I FSK input 24 P8_3 R1A I MAIN RE 25 P8_2 R2A I MAIN RE 26 P8_1 R1B I MAIN RE 27 P8_0 BEEP O BEEP output 28 P7_7 R2B I MAIN RE 29 P7_6 TBST O Tone-burst output 30 P7_5 ATT1 O ATT control output 31 P7_4 ATT2 O ATT control output 32 P7_3 ATT3 O ATT

42、control output 33 P7_2 PUSH I MAIN RE 34 RSD2/SCL2 RXD I Clone data input 35 TXD2/SDA2 TXD O Clone data output 36 P6_7 MRLC O MAIN red Indicator output 37 VCC1 VDD - Power supply 38 P6_6 MTLC O MAIN green Indicator output 39 VSS GND - GND 40 P6_5 /CS1 O LCD 41 P6_4 /RES O LCD 42 P6_3 A0 O LCD 43 P6_

43、2 WR O LCD 44 P6_1 /RD O LCD 45 P6_0 NC - - 46 P13_7 D0 O LCD 47 P13_6 D1 O LCD 48 P13_5 D2 O LCD 49 P13_4 D3 O LCD 50 P5_7 RDCSW O DCS/Tone filter shift No. Terminal Signal I/O Description 51 P5_6 NC - - 52 P5_5 MTSW O DCS/Tone filter SW 53 P5_4 STSW O DCS/Tone filter SW 54 P13_3 D4 O LCD 55 P13_2

44、D5 O LCD 56 P13_1 D6 O LCD 57 P13_0 D7 O LCD 58 P5_3 TP - TP12 59 P5_2 BPC1 O BEEP Volume 60 P5_1 BPC2 O BEEP Volume 61 P5_0 TC1 O Tone/DCS/DTMF Volume SW 62 P12_7 TC2 O Tone/DCS/DTMF Volume SW 63 P12_6 SRLC O SUB red Indicator output 64 P12_5 STLC O SUB green Indicator output 65 P4_7 EXT O Clone da

45、ta SW 66 P4_6 LOPOW O TX low power SW 67 P4_5 SPC O Audio SW 68 P4_4 AFPC O Audio power SW 69 P4_3 PT3 I TX Hi/Low input 70 P4_2 STB1 O PLL (IC202) data output 71 P4_1 PT3 O PTT SW 72 P4_0 PVC O PLL power 73 P3_7 T3C O T3V SW 74 P3_6 CHG O Battery charge SW 75 P3_5 C3C O C3V SW 76 P3_4 STB2 O Parall

46、el driver (IC207) data SW 77 P3_3 KI0 I Key matrix input 78 P3_2 KI1 I Key matrix input 79 P3_1 KI2 I Key matrix input 70 P12_4 KI3 I Key matrix input 81 P12_3 KO0 O Key matrix output 82 P12_2 KO1 O Key matrix output 83 P12_1 KO2 O Key matrix output 84 P12_0 KO3 O Key matrix output 85 VCC2 VDD2 - Po

47、wer supply 86 P3_0 FSKC O FSK SW 87 VSS GND - GND 88 P2_7 VOXC O Microphone amplifier (IC12) power 89 P2_6 STB3 O D/A IC (IC10) data input 90 P2_5 CLK O Data clock output 91 P2_4 DATA O DATA output 92 P2_3 TVC O 222MHz band TX SW 93 P2_2 PS1 O PLL SW of MAIN VCO 94 P2_1 PUSHH I SUB RE 95 P2_0 R2BB I

48、 SUB RE 96 P1_7 B2AA I SUB RE 97 P1_6 JDET I Ext power detection 98 P1_5 R1AA I SUB RE 99 P1_4 T12C O 1200MHz band TX SW 100 P1_3 MVCC O Main VCO buffer SW No. Terminal Signal I/O Description 101 P1_2 M12C O Main VCO 902MHz band power 102 P1_1 MUC O Main VCO 222MHz band power 103 P1_0 BP1 I Band pram detection 104 P0_7