dj175_SM.pdf

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1、 Specifications Circuit Description Parts List Exploded View PC Board View Adjustment Schematic Diagram Block Diagram ALINCO, INC. Service Manual Service Manual DJ-175 SPECIFICATIONS DJ-175 T: E: TFH: TX 144 147.995MHz RX 136 173.995MHz TX 144 145.995MHz RX 144 145.995MHz TX 136 173.995MHz RX 136 17

2、3.995MHz *144 147.995MHz *144 147.995MHz *144 145.995MHz *144 145.995MHz *150 173.995MHz *150 173.995MHz Frequency range: Modulation: Channel steps: Memory channels: Antenna impedance: Frequency stability: Microphone impedance: Power supply: Current drain (Approx.): Temperature range: Ground: Dimens

3、ion: Weight: DTMF: Subaudible Tone (CTCSS): Digital Code SQ. (DCS): * Guaranteed range per specifications F3E (FM), F2D* *T/E models only 5, 10, 12.5, 20, 25 one amplifier (pins 12, 13, and 14) is composed of pre-emphasis and IDC circuits and the other (pins 5, 6, 7, 8, 9, and 10) is composed of a s

4、platter filter. The maximum frequency deviation is obtained by IC105 and input to the cathode of the varicap of the VCO, to change the electric capacity in the oscillation circuit. This produces the frequency modulation. 2. Power Amplifier Circuit The transmitted signal is oscillated by the VCO, amp

5、lified by the pre-drive amplifier (Q101) and drive amplifier (Q106), and input to the final amplifier (Q105). The signal is then amplified by the final amplifier (Q105) and led to the antenna switch (D101) and low-pass filter (L104, L102, L101, C119, C118, C117, C127, C126, C125, C124, C108, and C10

6、1), where un-wanted high harmonic waves are reduced as needed, and the resulting signal is supplied to the antenna. 3. APC Circuit Part of the transmission power from the low-pass filter is detected by D108, converted to DC, and then amplified by a amplifier (IC101). The output voltage controls the

7、bias voltage from the source of Q105 and Q106 to maintain the transmission power constant. 3) PLL Synthesizer System 1. PLL The dividing ratio is obtained by sending data from the CPU (IC113) to pin 10 and sending clock pulse to pin 9 of the PLL IC ( IC101 ). The oscillated signal from the VCO is am

8、plified by the buffer (Q116) and input to pin 8 of IC102. Each programmable divider in IC102 divides the frequency of the input signal by N according to the frequency data, to generate a comparison frequency of 5 or 6.25kHz. 2. Reference Frequency Circuit The reference frequency appropriate for the

9、channel steps is obtained by dividing the 21.25MHz reference oscillation (X102) by 4250 or 3400, according to the data from the CPU (IC113). When the resulting frequency is 5kHz, channel steps of 5, 10, 15, 20, and 30kHz are used. When it is 6.25kHz, channel steps of 12.5, 25 , and 50kHz are used. 3

10、. Phase Comparator Circuit The PLL (IC102) uses the reference frequency, 5 or 6.25kHz. The phase comparator in the IC102 compares the phase of the frequency from the VCO with that of the comparison frequency, 5 or 6.25kHz, which is obtained by the internal divider in IC102. 4. PLL Loop Filter Circui

11、t If a phase difference is found in the phase comparison between the reference frequency and VCO output frequency, the charge pump output (pin 5) of IC102 generates a pulse signal, which is converted to DC voltage by the PLL loop filter and input to the varicap of the VCO unit for oscillation freque

12、ncy control. 5. VCO Circuit A Colpitts oscillation circuit driven by Q108 directly oscillates the desires frequency. The frequency control voltage determined in the CPU (IC113) and PLL circuit is input to the varicaps (D105 and D107). This change the oscillation frequency, which is amplified by the

13、VCO buffer (Q113) and output from the VCO unit. 4) CPU and Peripheral Circuits 1. LCD Display Circuit The CPU turns ON the LCD via segment and common terminals with 1/4 the duty and 1/3 the bias, at the frame frequency is 112.5Hz. 2. Display Lamp Circuit When the LAMP key is pressed, “L” is output f

14、orm pin 67 of CPU ( IC113) to the bases of Q140. Q140 then turn ON and the LEDs (D128 and D129) light. 3. Reset and Backup When the power form the DC jack or external battery increases from Circuits 0V to 2.5 or more, “ H “ level reset signal is output form the reset IC (IC108) to pin 6 of the CPU (

15、IC113), causing the CPU to reset. The reset signal, however, waits at 100, and does not enter the CPU until the CPU clock (X104) has stabilized. 4. S (Signal) Meter Circuit The DC potential of pin 12 of IC103 is input to pin 83 of the CPU (IC113), converted from an analog to a digital signal, and di

16、splayed as the S-meter signal on the LCD. 5. DTMF Encoder The CPU (IC113) is equipped with an internal DTMF encoder. The DTMF signal is output from pin 71, through IC112 (Low-pass filter), and then through the microphone amplifier (IC110), and is sent to the varicap of the VCO for modulation. At the

17、 same time, the monitoring tone passes through the AF circuit and is output form the speaker. 6. TONE Encoder The CPU (IC113) is equipped with an internal tone encoder. The tone signal (67.0 to 250.3Hz ) is output from pin 70 of the CPU to the 21.25MHz reference oscillation (X102) of the PLL referen

18、ce oscillator. 7. DCS Encoder The CPU (IC113) is equipped with an internal DCS code encoder. The code (023 to 754) is output from pin 70 of the CPU to the 21.25MHz reference oscillation (X102) of the PLL reference oscillator. 8. CTCSS, DCS Decoder The voice band of the AF output signal from pin 9 of

19、 IC103 is cut by sharp active filter IC111 and amplified, then led to pin 80 of CPU. The input signal is compared with the programmed tone frequency code in the CPU. The squelch will open when they match. 9. Clock Shift In the unlikely event that CPU clock noise is present on a particular operating

20、frequency programmed into the radio, you can shift the CPU clock frequency to avoid the CPU clock-noise. The output signal from pin 8 of the CPU turns on Q127. Then the oscillation frequency of X104 will be shifted about 200 ppm. Ref. No.Parts No.Parts nameVersionRef. No.Parts No.Parts name C101CU35

21、35GRM36B102K50PTC173 C102CU3535GRM36B102K50PTC174 C103CU3519GRM36CH470J50PTC175 C104CU3535GRM36B102K50PTC176CU3502GRM36CK010C50PT C105C177CU3535GRM36B102K50PT C108CU3535GRM36B102K50PTC178CU3513GRM36CH150J50PT C109CU3512GRM36CH120J50PTC179CU3535GRM36B102K50PT C110CU3505GRM36CH040C50PTC180CU3515GRM36C

22、H220J50PT C111CU3535GRM36B102K50PTC181CU0119GRM21BB30J106KE18L C112CU3520GRM1552C1H560JD01DC182CU3554GRM36B104K10PT C113CU3535GRM36B102K50PTC183CU3535GRM36B102K50PT C114CU3503GRM36CK020C50PTC184CU3547GRM36B103K16PT C115C185CU3535GRM36B102K50PT C116CU3512GRM36CH120J50PTC186 C117CU3513GRM36CH150J50PTC

23、187CU3513GRM36CH150J50PT C118CU3513GRM36CH150J50PTC188CU35081005 CH 50V 7PF D C119CU3513GRM36CH150J50PTC189CU3535GRM36B102K50PT C120C190 C122CU3559GRM155B30J105KE18DC191CU3137GRM188B31C105KA92D C123C192CU3535GRM36B102K50PT C124CU3512GRM36CH120J50PTC193CU3514GRM36CH180J50PT C125CU3512GRM36CH120J50PTC

24、194CU3554GRM36B104K10PT C126CU3513GRM36CH150J50PTC195CU3535GRM36B102K50PT C127CU3514GRM36CH180J50PTC196CU3502GRM36CK010C50PT C129CU3512GRM36CH120J50PTC197CU3527GRM1552C1E221JD01D C130CU3514GRM36CH180J50PTT, E, EUKC198CU3554GRM36B104K10PT C131CU3517GRM36CH330J50PTC199CU3515GRM36CH220J50PT C132CU3516G

25、RM36CH270J50PTC200CU3554GRM36B104K10PT C133CU3517GRM36CH330J50PTC201CU3535GRM36B102K50PT C134CU3513GRM36CH150J50PTC202CU3547GRM36B103K16PT C135CU3513GRM36CH150J50PTC203CU3535GRM36B102K50PT C136CU3513GRM36CH150J50PTC204CU3535GRM36B102K50PT C137CU3535GRM36B102K50PTC205CS039620V 0.1UF C138C206CS039620V

26、 0.1UF C139C207CU3547GRM36B103K16PT C140CU3554GRM36B104K10PTC209CU3515GRM36CH220J50PTT, E, EUK C141CU3535GRM36B102K50PTC209CU3514GRM36CH180J50PTTFH C142CU3502GRM36CK010C50PTC210CU3505GRM36CH040C50PT C144C211CU3526GRM1552C1E181JD01D C145CU3535GRM36B102K50PTC212CU3528GRM1552C1E271JD01D C146CU3535GRM36

27、B102K50PTC213CU3526GRM1552C1E181JD01D C147CU3506GRM36CH050C50PTC214CU3535GRM36B102K50PT C149CU3502GRM36CK010C50PTC215CU3554GRM36B104K10PT C150CU3502GRM36CK010C50PTC216 C151CU3547GRM36B103K16PTC219CS03986.3V 2.2UF C152CU3535GRM36B102K50PTC220CU3535GRM36B102K50PT C153C221CU3535GRM36B102K50PT C155CU353

28、5GRM36B102K50PTC222CU3535GRM36B102K50PT C156C223 C157CU3535GRM36B102K50PTC224CU3547GRM36B103K16PT C158CU3535GRM36B102K50PTC225CU3535GRM36B102K50PT C159CU3547GRM36B103K16PTC226CU3535GRM36B102K50PT C160CU3535GRM36B102K50PTC227CU3535GRM36B102K50PT C161CU3535GRM36B102K50PTC228CU3515GRM36CH220J50PT C162C

29、229CU3515GRM36CH220J50PT C163CU3535GRM36B102K50PTC230CU3512GRM36CH120J50PT C164CS0441TMCMA0J226MTRFC231CU0119GRM21BB30J106KE18L C165CU3535GRM36B102K50PTC232CU3535GRM36B102K50PT C166CU3513GRM36CH150J50PTC233CU3522GRM1552C1H820JD01D C167CU3523GRM1552C1H101JZ01DC234CU3547GRM36B103K16PT C168CU3502GRM36C

30、K010C50PTC235CU3519GRM36CH470J50PT C169CU3502GRM36CK010C50PTC236CU3535GRM36B102K50PT C171CU3511GRM36CH100D50PTC237CU3547GRM36B103K16PT C172CU3535GRM36B102K50PTC238CU3539GRM36B222K50PT MAIN UNIT Parts List Ref. No.Parts No.Parts nameVersionRef. No.Parts No.Parts name C239CU3547GRM36B103K16PTC305CU313

31、8GRM188B31C225KE14DT, E, EUK C240CU3535GRM36B102K50PTC306CU3559GRM155B30J105KE18D C241CU3539GRM36B222K50PTC307CU3535GRM36B102K50PT C242CU3535GRM36B102K50PTC308CU3138GRM188B31C225KE14D C243CU3573GRM1554C1HR80BZ01DC310CU3137GRM188B31C105KA92D C244CU3573GRM1554C1HR80BZ01DC311CU3535GRM36B102K50PT C245CU

32、3523GRM1552C1H101JZ01DC312CU3554GRM36B104K10PTT, E, EUK C246CU3554GRM36B104K10PTC313CU3137GRM188B31C105KA92D C247CU3554GRM36B104K10PTC314CU3547GRM36B103K16PT C248CU3559GRM155B30J105KE18DC315CU3547GRM36B103K16PT C249CU3537GRM36B152K50PTC316CU3554GRM36B104K10PT C250CU3537GRM36B152K50PTC317CU3517GRM36C

33、H330J50PT C252CU3535GRM36B102K50PTC318CU3516GRM36CH270J50PT C253CU3543GRM36B472K25PTC319 C254CU35491005 B 16V 0.015UF KC320CU3535GRM36B102K50PT C255CU3535GRM36B102K50PTC321CU3535GRM36B102K50PT C256CU3516GRM36CH270J50PTC322CU3559GRM155B30J105KE18D C257CU3505GRM36CH040C50PTC323CU3535GRM36B102K50PT C25

34、8CU3523GRM1552C1H101JZ01DC324CU3559GRM155B30J105KE18D C259C325CU3554GRM36B104K10PT C260CU3554GRM36B104K10PTC326 C261CU3547GRM36B103K16PTC327CU3137GRM188B31C105KA92D C262CU3535GRM36B102K50PTC328CU3535GRM36B102K50PT C263CU35081005 CH 50V 7PF DT, E, TFHC329CU3554GRM36B104K10PT C263CU3513GRM36CH150J50PT

35、EUKC330CU3535GRM36B102K50PT C264CU3535GRM36B102K50PTC331CU0119GRM21BB30J106KE18L C265CE043616CE47BSSC332CU3535GRM36B102K50PT C266CU3137GRM188B31C105KA92DC333CU3535GRM36B102K50PT C267CU3535GRM36B102K50PTC334CU0119GRM21BB30J106KE18L C268CU3535GRM36B102K50PTC335CU3540GRM36B272K50PT C269CU3523GRM1552C1H

36、101JZ01DC336CU3523GRM1552C1H101JZ01D C270CU3523GRM1552C1H101JZ01DC337CU3535GRM36B102K50PT C271CU3523GRM1552C1H101JZ01DC338CU3137GRM188B31C105KA92D C272CU3535GRM36B102K50PTC339CU3137GRM188B31C105KA92D C273CU3547GRM36B103K16PTC340CU3535GRM36B102K50PT C274CU3554GRM36B104K10PTC341CU3547GRM36B103K16PT C2

37、75CU3535GRM36B102K50PTC342CU3547GRM36B103K16PT C276CU3523GRM1552C1H101JZ01DC343CU3554GRM36B104K10PT C277CU3535GRM36B102K50PTC344CU3554GRM36B104K10PT C278CU3523GRM1552C1H101JZ01DC345CU3554GRM36B104K10PT C279CU3547GRM36B103K16PTC346CU3547GRM36B103K16PT C280CS0441TMCMA0J226MTRFC347CU3523GRM1552C1H101JZ

38、01D C281CU3535GRM36B102K50PTC348CU3547GRM36B103K16PT C282CU3554GRM36B104K10PTC349CU3539GRM36B222K50PT C284CU3559GRM155B30J105KE18DC350CU3533GRM36B681K50PT C285CU3554GRM36B104K10PTC351 C286CU3527GRM1552C1E221JD01DC352CU3547GRM36B103K16PT C287CU3535GRM36B102K50PTC353CU3539GRM36B222K50PT C288CU3527GRM1

39、552C1E221JD01DC354CU3541GRM36B332K50PT C289CU3535GRM36B102K50PTC355CU3547GRM36B103K16PT C290CU3554GRM36B104K10PTC356CU3535GRM36B102K50PT C291CU3138GRM188B31C225KE14DC357CU3535GRM36B102K50PT C292CE043616CE47BSSC358CU0119GRM21BB30J106KE18L C293CU3554GRM36B104K10PTC359CU3553GRM36B473K10PT C294CU3535GRM

40、36B102K50PTC360CU3559GRM155B30J105KE18D C295C361CU3535GRM36B102K50PT C296CE046310CE100BSSC362CU3533GRM36B681K50PT C297C363CU3535GRM36B102K50PT C298CU3535GRM36B102K50PTC364CU3539GRM36B222K50PT C299CU3137GRM188B31C105KA92DC365CU3533GRM36B681K50PT C300CU3554GRM36B104K10PTC366CU3537GRM36B152K50PT C301CU

41、3535GRM36B102K50PTC367CU3523GRM1552C1H101JZ01D C302CE04626CE100BSSC368CU3531GRM36B471K50PT C303CU3535GRM36B102K50PTC369CU3541GRM36B332K50PT C304CU3554GRM36B104K10PTC370CU3554GRM36B104K10PT Ref. No.Parts No.Parts nameVersionRef. No.Parts No.Parts name C371CU3535GRM36B102K50PTD130XD0418RB521S-30TE61 C

42、372CU3559GRM155B30J105KE18DFL101XF0059Q21707AD27-21.7MHZEUK C373FL101XF0051Q2175AD20 21.7MHZT, E, TFH C375CU3541GRM36B332K50PTFL102XF0059Q21707AD27-21.7MHZEUK C376CU3554GRM36B104K10PTFL102XF0051Q2175AD20 21.7MHZT, E, TFH C377CU3554GRM36B104K10PTFL103XC0052ALFYM450G=KEUK C378FL103XC0060ALFYM450F=KT,

43、E, TFH C379CU3535GRM36B102K50PTIC101XA1103LM2904PWR C380CU3535GRM36B102K50PTIC102XA1107MB15E07SRPFTGBNDEFE1 C381CU3535GRM36B102K50PTIC103XA0404TA31136FNG(EL) C382CS0439TMCMA0J476MFIC104XA0210IC NJM2070M C383CU3535GRM36B102K50PTIC105XA1293M62364FP#DF1G C384CU3535GRM36B102K50PTIC106XA1119XC6202P502MR

44、C385CU3535GRM36B102K50PTIC107XA0617TC75S56FU(TE85)T, E, EUK C386CU0119GRM21BB30J106KE18LIC108XA1120S80845CLNB-B66-T2G C387CU3535GRM36B102K50PTIC109XA1117S24CS64A01-J8T1G C388CU3535GRM36B102K50PTIC110XA1106LM2902PWR C389CU3535GRM36B102K50PTIC111XA1106LM2902PWR C390CU3554GRM36B104K10PTIC112XA1106LM290

45、2PWR C391CU3535GRM36B102K50PTIC113XA1358UPD78F0395GC-8EA-AT, E, EUK C392CU3535GRM36B102K50PTIC113XA1292UPD78F0394GC-8EA-ATFH C393CU0119GRM21BB30J106KE18LJK101UJ0019HSJ1493-01-010 C394CU3512GRM36CH120J50PTJK102UJ0022HSJ1102-01-540 C395CU3535GRM36B102K50PTL101QS4015560.40-1.55-6TL C396CU3535GRM36B102K

46、50PTL102QS4020060.40-2.0-6TL C397CU3535GRM36B102K50PTL104QS4020060.40-2.0-6TL C398CU3138GRM188B31C225KE14DL105QS4014050.40-1.4-5TL C399L106QS5014030.50-1.4-3TL C400L108QC08121005 100NH C401CU3554GRM36B104K10PTL109 C403CS0441TMCMA0J226MTRFL110QC0757C1608CB22NJ C404CU3554GRM36B104K10PTL111 C413CU3559G

47、RM155B30J105KE18DT, E, EUKL112QS4020570.40-2.05-7TL C414CU3554GRM36B104K10PTL113QC0875C2012H68NH C415CU3554GRM36B104K10PTL114QC0902C2012C1R0J CN101L115QC08121005 100NH CN102L116QC0736LK10052R2K-B D101XD0422HSC277TRF-EL117QB0057MPZ1608S101AT D103XD04191SS400TE61L118QS4020570.40-2.05-7TL D104L120QB005

48、7MPZ1608S101AT D105XD04211SV323(TPH3,H)L121QC0818C2012H82NH D106XD0422HSC277TRF-EL123QC0736LK10052R2K-B D107XD04211SV323(TPH3,H)L124QC0773C1608CBR47J D108XD0453RB717FL125QC0773C1608CBR47J D109L126QC07691608CBR22J D110XD0451015AZ3.0-X(TPL3,F)L127QC07651608 100NH D111L128 D112XD0422HSC277TRF-EL129QC08

49、121005 100NH D113XD0422HSC277TRF-EL130 D114XD04211SV323(TPH3,H)L132QC0842LB2518T221K D115XD04211SV323(TPH3,H)L133QC08121005 100NH D116L134QC0902C2012C1R0J D117XD04211SV323(TPH3,H)L135QC0875C2012H68NH D118XD04211SV323(TPH3,H)L136QC0875C2012H68NH D119XD04211SV323(TPH3,H)L137QC0875C2012H68NH D120XD04211SV323(TPH3,H)L138QC0875C2012