TS-60S_serv.pdf

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1、I 5OMHz ALL MODE TRANSCEIVER 0 1994-1 PRINTED IN JAPAN 851 -8252-00 (0) 1095 t- Knob (Power) Microphone (K29-4811-04) (T91-0528-051 SERVICE MANUAL Phone jack Panel (Ell-0454-05) (A62-0296-03) 1 Knob (MHz) Knob (UP) (K29-4813-04) lK29-4815-041 Knob (F. LOCK) Knob (DOWN1 1 Knob (K29-4812-04) lK29-4814

2、-04) (K29-4817-04) x 3 Knob IAFIRIT) Knob (K29-4809-04) x 2 (K29-4816-04) x 6 1 Knob Knob (SOUIF SHIFT) Knob (MAIN) Knob lK29-4817-04) x 3 (K29-4810-04) x 2 (K21-0793-041 (K29-4818-04) x 2 CONTENTS CIRCUIT DESCRIPTION . 2 SEMICONDUCTOR DATA . 21 DESCRIPTION OF COMPONENTS . 25 PARTS LIST . 3.0 EXPLOD

3、ED VIEW . 61 PACKING 64 ADJUSTMENT . 65 TERMINAL FUNCTION . 83 CIRCUIT DIAGRAMS I PC BOARD VIEWS LCD ASSY (838-0719-15) . 86 FINAL UNIT (X45-3490-00) . 89 DIGITAL UNIT (X46-318X-XX) . 93 PLL UNlT 1x50-3200-00) . 97 r DDS (X58-4020-00) . 99 VCO 1x58-4120-00) . 100 IF UNlT 1x48-3110-00) . 104 ALC (X59

4、-3990-00) . 104 TX-RX UNlT (X57-4570-00) . 105 DSST (X59-4000-00) . 109 SCHEMATIC DIAGRAM . 115 BLOCK DIAGRAM . 117 MB-13 (MOUNTING BRACKET) . 119 PG-2Y (DC CABLE) . 119 MC-47 (MULTI FUNCTION MICROPHONE) . 120 SPECIFICATIONS . 121 CIRCUIT DESCRIPTION Frequency Configuration T The TS-60s uses double

5、conversion in all transmis- sion modes, double conversion in all reception modes except FM, and triple conversion in FM reception mode. (Fg. 1) Table 1 Display frequency in each mode Display f r e q Transmit carrler frequency . MIX-2 73.04SMHz MIX-1 B M 0 MIC AM DET MIX-1 73.045MHz MIX-2 RX OUTPUT F

6、ig. 1 Frequency configuration 1 The receiver frequency in SSB mode is given by the following equation when the receiver tone produced by the input frequency ( f l ) from the antenna is zero beat (when an SSB signal with a carrier point of IN is zeroed in): IN = ILOI - f o z - CAR Since all these fre

7、quencies are generated by the PLL circuit, as shown in Figure 2 (PLL frequency con- figuration), the receiver frequency is determined only by the reference frequency, STD, and the PLL divide ratio. This means, the accuracy of the reference fre- quency determines the accuracy of the operating fre- qu

8、ency of the transceiver. The accuracy of the reference crystal oscillator used in the TS-GOS is 10 ppm (-1 0 to +50C). The accuracy of the optional temperature-compensated crystal oscil- lator (TCXO, SO-2) is 0.5 ppm (-1 0 to +50C). In SSB transmission mode or in other modes, the frequency is determ

9、ined by the reference frequency (STD) and the PLL divide ratio. Table 1 lists the display frequencies in the various modes. The pitch of the incoming signal in CW mode can be varied in 50-Hz steps in the range 400 to 1000Hz with- out changing the center frequency of the IF filter (vari- able CW pitc

10、h system). FM transmission is carried out by applying the audio signal from the microphone to the 62.35-MHzVCO and modulating f o z . 2 PLL Circuit Configuration The TS-60s PLL circuit uses a reference frequency of 20MHz. and covers 40 to 6OMHz (K), 50 to 54MHz (E) in 5- to 200-Hz steps, depending o

11、n how fast the encoder is turned. Figure 2 shows the frequency con- figuration of the PLL circuit. Figure 3 is a PLL block dia- gram. 1 1. Reference oscillator circuit The reference frequency (STD) for frequency control is generated by the 20-MHz crystal oscillator, XI and Q12 (2SC2714(Y). The refer

12、ence frequencies for other circuits are produced by dividing STD by two and by five by IC2 (pPD74HC390G). STD is divided by two to produce a 10-MHz PLL reference signal, which goes to lCll (CXD1225M) and lClOl (CXD1225M). It is in- put to the CAR oscillator section to produce a 10.695- MHz signal. T

13、he 4-MHz signal produced by dividing fSTD by five goes to IC4 (SN16913P). The crystal oscillator circuit can be replaced by an optional TCXO (SO-2). The TS-60s can be switched to the TCXO by removing a shorting jumper (WlN2). 1 r CIRCUIT DESCRIPTION 2. LO2 (PLL loop) The VCO of IC10 (KCH14) generate

14、s a signal of 62.35MHz. The 10-MHz reference frequency is ap- plied to pin 5 of IC101 (CXD1225M), and is divided by 200 (800 in FM mode) to produce a 50-kHz (1 2.5-kHz in FM mode) comparison frequency. The output from the VCO is applied to pin 11 of IC101, and is divided by 1247 (4988 in FM mode). I

15、t is then compared with the 50-kHz (12.5-kHz in FM mode) reference signal by the phase comparator to lock the VCO frequency. Divide ratio data is supplied by the digital unit. The output is amplified by amplifier Q18 (2SC2954) and passes through a low-pass filter. The VCO is modulated in FM mode. c

16、3. LO1 (PLL lwpl Q1, 0 3 (2SK508NV) in the X58-4120-00 are VCOs. 01 generates a signal of 113.045 to 123.044MHz; and Q3, a signal of 123.045 to 133.045MHz. K type Q3 (2SK508NV) in the X58-4120-00 are VCO. Q3 generates a signal of 123.045 to 127.045MHz. E type The 10-MHz reference signal is input to

17、pin 5 of lCl 1 (CXD1225M) and is divided by 20 to produce a 500-kHz comparison frequency. The output signal from the VCO is mixed with a 75.045- to 75.545-MHz signal from the PLL (described later) to produce a 38.0- to 57.5-MHz signal. It is input to pin 11 of IC11, di- vided, and compared with the

18、500-kHz signal by the phase comparator, and the VCO frequency is locked. Divide ratio data is supplied by the digital unit. The 20-MHz reference signal is input to DDSl (X58- 4020-OO), and the output signal is mixed with a 4-MHz signal by IC4 to generate a signal of 4.455 to4.955MHz (in 5- or 200-Hz

19、 steps). The signal is mixed with the 80- MHz signal (4 x 20-MHz reference frequency) by IC5 (SN16913P) to produce a 75.045 to 75.545MHz signal (in 5- or 200-Hz steps). 4. CAR The 20-MHz reference signal is input to DDS2 (X58- 4020-OO), and the output signal is mixed by IC7 (SN 16913P) with the 10MH

20、z signal divided by IC2 to pro duce a 10.695-MHz signal. This signal passes through the band-pass filter and amplifier and is output for local oscillation and detection. 5. DDS The DDS is the same as that used in the TS-50. Fig. 2 PLL circuit frequency configuration CIRCUIT DESCRIPTION Receiver Circ

21、uit Configuration The second IF signal of 10.695MHz is split into two. The configuration of the receiver circuit is double- One signal goes to the NB amplifier, and the other conversion with a first IF of 73.045MHz and a second passes through the NB gate FET (3SK131). The signal IF of 10.695 MHz. an

22、d tripleconversion in FM mode then passes through the CF (XF2) and is detected by IC2 (KCD04) in FM mode. In other modes, the signal with a first IF Of 73.045MHz a second IF Of goes to the IF filter of the X48-3110-00 unit. There are 10.695MHz, and a third IF of 455kHz. (Fig. 5) The incoming signal

23、from the antenna passes three types of IF filter: 6-kHz. 2.7-kHz, and 500-Hz (500- through the antenna switch relay on the filter unit, then Hz is optional). The signal passing through the IF filter goes to IC3 (KCD08), and is productdetected in SSB through the O-MHz low-pass filter. and goes to the

24、 and CW modes, and envelope-detected in AM mode, TX-RX unit. The sianal oasses throuah a 20dB attenu- -, - ator and 54-MHz low-pass filter in the TX-RX unit, and goes through the band-pass filters. If AIP is off, the signal passing through band-pass filter is amplified by the RF amplifier, Q9. Q10 a

25、nd Q69 (2SK520 x 3), and is input to the first mixer, Q5 to Q8 (2SK520 x 4). If AIP is - on, the signal bypasses Q9.010 and Q69 and goes di- rectly to the first mixer. It is mixed with the LO1 signal by the first mixer to produce a first IF signal of 73.045MHz. The first IF signal of 73.045MHz passe

26、s through the MCF (XFl), is amplified by Q17 (3SK131), and mixed with the 62.35-MHz LO2 signal by the second mixer. Q18 and Q19 (2SK520 x 2). to oroduce a second IF 1. Receiver front-end The signal input to the TX-RX unit passes through the switching circuit of the attenuator and the 60-MHz low-pass

27、 filter, and goes to band-pass filters. If AIP is off, D49 and D l 1 turn on and D8 and D9 turn off, and the signal passing through filter is amplified by about 10 dB by Q9, Q10 and Q69 (2SK520 x 3) and output to the first mixer. If AIP is on, D49 and D l 1 turn off and D8 and D9 turn on, and the si

28、gnal is output directly to the first mixer without passing through 09, Q10 and Q69. The first mixer, is a quad balanced mixer, Q5 to 0 8 (2SK520 x 4). (Fig. 4) signal of 10.695MHz. TX-RX UNIT 1x57-4570-00) Fig. 4 Receiver front-end TX-RX UNIT CIRCUIT DESCRIPTION 2. Noise blanker circuits The 10.695-

29、MHz IF signal generated from the first IF of 73.045MHz by the second mixer is input to IF am- plifier Q21 (3SK1311, sent through Q20, amplified by noise amplifier 0200. 0201, and 0202 (2SC2714). sent through buffer Q203, and noise-detected by D200. This signal switches Q205. Q206, and Q209, and cont

30、rols Q22 in the TX-RX unit. Q22 controls IF amplifier Q21 and blanks the noise. 7h ?7 TX-RX UNlT . PLL UNlT Fig. 6 Noise blanker circuits 7 CIRCUIT DESCRIPTION 3. SSB, AM, CW filter circuit The second IF signal amplified by 021 is input to the X48-3110-00 unit in all modes except FM. If an optional

31、CW filter (XF1) is installed and CW NARROW is elected in CW mode, the signal passes through XF1 according to the control signal from the microcomauter. If XF1 is not installed or CW NAR- XF2. In AM mode, the signal passes through XF3 and XF2 ,- - -.- - - ROW is nbt selected, the signal passes throug

32、h XF3 insertion loss as in SSB mode if AM NARROW is selected. If AM NARROW is not selected, the signal passes through XF2 only. In FM mode, the signal does not pass through the filter circuit in this unit. Item Nominal center frequency Center frequency deviation Pass bandwdth and Attenuation bandwid

33、th Rinnle and XF2. In SSB mode, the signal passes through XF3 and - CW (OPTION) m Rating 10.695MHz - Within i20OHz at 6dB 22kHz or more at 6dB i-l5kHz or less at 20dB +2.4kHz or less at 6 0 d ?riw Guaranteed attenuation / 60dB or more withn fo i 4OkHz Terminating impedance 1 2 k R i 5 % 1 6 p F i 5

34、% lNO-FOOuT Bandwidth XF1 : 500Hz XF2 : 6kHz XF3 : 24kHz Table 4 MCF (L71-0249-05) : IF unit XF3 Fig. 7 Filter circuit 4. SSB, AM, CW detection circuit After unwanted signal components have been re- - moved in the X4E3110-00 unit, the signal is input to IC3 IKCD08). The signal amplified by IC3 is mi

35、xed with the CAR signal input from C N l l in SSB and CW modes, and detected to output an audio signal. In AM mode, the signal is envelope-detected by the diode and capacitor to output an audio signal. Item 5. FM detection circuit The impedance of the second IF signal amplified by 021 is converted b

36、y 023 (RU201) in FM mode, and unwanted signal components are removed by the CF (XF2). The resulting signal is input to the detection IC (IC2: KCD04). The signal is then mixed with the 10.24- MHz oscillator signal to generate the 455-kHz signal. The signal is passed through ceramic filter CFI, and de

37、tected by the quadrature detector with the signal phase-shifted by CD1 Rating Nominal center frequency 1 10,695kHz deviation 1 Within +80Hz at 6dB .-.,.,.-.s . , . . v , .-.-?. I pears at the base of 031. When the SQVR is turned Table 2 MCF (L71-0283-05) : IF unit XF1 (Option) clockwise. the emitter

38、 voltaae of 031 increases and 6. Squelch circuit 7 - Insertion loss 1 Within 5dB i 2dB iti irnniianrr 1 19nnoifin p In all modes except FM, the 10.695-MHz IF signal is detected by a diode in IC3, passed through 029 and 030, and a voltage proportional to the signal level ap- - Q32 is switched on. In

39、FM mode, as the IF signal increases, the noise level decreases, and the voltage at the SQ pin de- creases, making the SC pin low. When the SO VR is turned clockwise, the voltage at the SQ pin rises, and the SC pin goes high. Current flows through R77, and 032 turns on. 035 turns on to mute the AF si

40、gnal line. (Fig. 8) Item Rating Table 3 MCF lL71-0433-05) : IF unit XF2 - Nominal center frequency Pass bandwidth Attenatlon bandwidth Ripple Insenion loss Guaranteed attenuation Terminating impedance 10695MHz GkHz or more at GdB 4OkHz or less at 60dB 2dB or less 3dB or less 60dB or more within fo f

41、 1 MHz 12kn + 10% IF + 10% CIRCUIT DESCRIPTION Fig. 8 Squelch circuit 7. Signalstrength meter circuit 8. AGC circuit In all modes except FM, the signalstrength meter The time constant for the signal envelope-detected circuit comprises operational amplifier IC5. The signal, by IC3 is changed in each

42、mode by the analog switch. level-detected by IC3, is input to IC5 11/21 and amplified The effective value, not the peak value, is used in AM by about 8 dB by IC5 (212). mode. When SLOW is selected in SSB and CW In FM mode, the level detection signal from IC2 is modes, the analog switch is turned on.

43、 (Fig. 9) adjusted by VR2, selected by IC4 (BU4066BF) accord- ing to the mode, andoutput directly to the digital unit. (Fig. 9) CIRCUIT DESCRIPTION IC3 KCDOB 1 1 11 - . Y + L T I SSB. AM. CW IC2 KCDO4 - F M SM FM Fig. 9 S-meter and AGC circuits Transmitter Circuit Configuration The audio signal from

44、 the microphone enters CN15 of the TX-RX unit. The signal then goes to 038 (2SC3722K) of the microphone amplifier, and is split and directed to the SSB and FM systems. In the SSB system, the signal, its gain properly adjusted by VR7, is amplified by Q40 (2SC2712(Y), balance-modulated with the CAR si

45、gnal (10695MHz) input from CN1l by IC8 (KPCOHA), passed through 042 (2SC2712(Y). and sent to the ciystal filter in the X48-3110-00 unit. The SSB signal passing through the filter is amplified by Q43 (3SK131 M). The 62.35-MHz LO2 signal from the PLL unit is input from CN3 of the TX-RX unit, and mixed

46、 with the 10.695-MHz signal amplified by Q43. 046, and 047 (3SK131 (M) to produce a 73.045-MHz signal. The LO1 signal from the PLL unit is input from CN2 of the TX-RX unit, and mixed with the 73.045-MHz signal by 048 and 049 (3SK184(R) to generate the desired signal. The signal passes through the band-pass filter and is amplified by 050 (2SC2954) to produce the drive out- put, which goes to the final unit from CN19. The signal is ampl