FT-250R_SM.pdf

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1、2009 VERTEX STANDARD CO., LTD. EH038N90A Technical Supplement Specifications.2 Exploded View Standby, Saver off : 38 mA Standby, Saver on : 23 mA Auto Power Off : 8 mA Transmit(HIGH) : 1.3 A; (MID) : 900 mA; (LOW) : 500 mA; Operating Temperature:4 to 140 F (20 C to +60 C) Case size (WHD):2.3 (W) x 4

2、.3 (H) x 1.1 (D) (58 x 108.5 x 26.5 mm) (w/o knob check with your dealer. 3FT-250R Technical Supplement Exploded View a 450 kHz second IF is produced when this signal is mixed with the first IF signal within Q1017. The second IF then passes through the main selectivity element, ceramic filter CF1001

3、 (CFWM450E) to strip away all but the desired signal; it is then applied to the limiter amplifier in Q1017, which removes amplitude variations in the 450kHz IF, before detection of the speech by the ceramic discriminator CD1001 (JTBM450CX24). Detected audio from Q1017 is applied to a low-pass filter

4、 consisting of capacitors C1208, C1209 it is then passed through the de- emphasis network consisting of capacitor C1057 and re- sistor R1208 to a high-pass filter consisting of capacitors C1058, C1059 it is then delivered to D1010 (HSC277) for frequency mod- ulation of the PLL carrier (up to 5kHz fr

5、om the unmod- ulated carrier) at the transmitting frequency. If an external microphone is used, PTT switching is con- trolled by Q1054 (UMZ2N), which signals the micropro- cessor Q1035 when the impedance at the microphone jack drops. If a CDCSS code is enabled for transmission, the code is generated

6、 by microprocessor Q1035 and delivered to D1015 (HVC350B) for CDCSS modulating. If DTMF is enabled for transmission, the tone is generat- ed by the microprocessor Q1035 and applied to the splat- ter filter section in place of the speech audio. Also, the tone is amplified for monitoring in the loudsp

7、eaker. The modulated signal from the VCO Q1023 (2SC5374) is buffered by Q1022 and Q1018 (both 2SC5374). The low- level transmit signal is amplified by Q1010 (2SC5226-5) and Q1009 (2SK3074); it is then applied to the final am- plifier Q1008 (RD07MVS1A), which provides up to 5 watts output power. The

8、transmit signal then passes through the antenna switch D1001 (RLS135) and is low-pass filtered to sup- press harmonic spurious radiation before delivery to the antenna. Automatic Transmit Power Control Drain current of the final amplifier Q1008 (RD07MVS1A) is sampled by R1028 and R1035. The resultin

9、g DC is fed back through the APC amplifier Q1003 (NJM2904V) to the driver amplifier Q1009 (2SK3074) and final amplifi- er Q1008, for control of the power output. The microprocessor selects either “High” or “Low” pow- er levels. Transmit Inhibit When the PLL is unlocked, pin 7 of PLL subsystem IC Q10

10、30 (MB15A01PFV1) goes to a logic “Low.” The re- sulting DC unlock control voltage is passed through the inversion amplifier Q1032 (2SA1774) to pin 8 of the mi- croprocessor Q1035. While the PLL is unlocked, pin 15 of Q1035 remains “Low,” disabling the gate voltages of driv- er amplifier Q1009 (2SK30

11、74) and final amplifier Q1008 (RD07MVS1A), thereby disabling the transmitter. Spurious Suppression Generation of spurious products by the transmitter is minimized by the fundamental carrier frequency being equal to final transmitting frequency, modulated directly in the transmit VCO. Additional harm

12、onic suppression is provided by a low-pass filter consisting of coils L1001, L1002, L1003, L1006, L1007 realignment should not be done until after the faulty component has been replaced. We recommend that servicing be performed only by au- thorized Vertex Standard service technicians who are ex- per

13、ienced with the circuitry and fully equipped for repair and alignment. If a fault is suspected, contact the dealer from whom the transceiver was purchased for instruc- tions regarding repair. Authorized Vertex Standard ser- vice technicians realign all circuits and make complete per- formance checks

14、 to ensure compliance with factory spec- ifications after replacing any faulty components. Those who do undertake any of the following alignments are cautioned to proceed at their own risk. Problems caused by unauthorized attempts at realignment are not covered by the warranty policy. Also, Vertex S

15、tandard reserves the right to change circuits and alignment proce- dures in the interest of improved performance, without notifying owners. Under no circumstances should any alignment be attempt- ed unless the normal function and operation of the trans- ceiver are clearly understood, the cause of th

16、e malfunc- tion has been clearly pinpointed and any faulty compo- nents replaced, and realignment determined to be abso- lutely necessary. Required Test Equipment The following test equipment (and familiarity with its use) is necessary for complete realignment. Correction of prob- lems caused by mis

17、alignment resulting from use of im- proper test equipment is not covered under the warranty policy. While most steps do not require all of the equip- ment listed, the interactions of some adjustments may re- quire that more complex adjustments be performed after- wards. Do not attempt to perform onl

18、y a single step unless it is clearly isolated electrically from all other steps. Have all test equipment ready before beginning and, follow all of the steps in a section in the order presented. ? RF Signal Generator with calibrated output level at 200 MHz ? Deviation Meter (linear detector) ? In-lin

19、e Wattmeter with 5% accuracy at 200 MHz ? 50-Ohm 10-W RF Dummy Load ? 8-Ohm AF Dummy Load ? Regulated DC Power Supply adjustable from 3 to 16.5 VDC, 2A ? Frequency Counter: 0.2-ppm accuracy at 200 MHz ? AF Signal Generator ? AC Voltmeter ? DC Voltmeter: high impedance ? VHF Sampling Coupler ? SINAD

20、Meter Alignment Preparation alignment is not possible with an anten- na. After completing one step, read the next step to see if the same test equipment is required. If not, remove the test equipment (except dummy load and wattmeter, if connected) before proceeding. Correct alignment requires that t

21、he ambient temperature be the same as that of the transceiver and test equipment, and that this temperature be held constant between 68 86 F (20 30 C). When the transceiver is brought into the shop from hot or cold air, it should be allowed some time to come to room temperature before alignment. Whe

22、never possible, alignments should be made with os- cillator shields and circuit boards firmly affixed in place. Also, the test equipment must be thoroughly warmed up before beginning. Note: Signal levels in dB referred to in the alignment pro- cedure are based on 0dB = 0.5V. 11FT-250R Technical Supp

23、lement Alignment Test Setup Set up the test equipment as shown below for transceiver alignment, and supply 7.5 V DC power to the transceiver. PLL Reference Frequency ? With the wattmeter, dummy load and frequency counter connected to the antenna jack, select 146 MHz, key the transmitter, and adjust

24、TC1001 on the Main Unit, if necessary, so the counter frequency is within 100 Hz of 146 MHz. “TX SECTION” ALIGNMENT SETUP “RX SECTION” ALIGNMENT SETUP MICGND AF Signal Generator 9.9 V DC Regulated Power Supply RF Sampling Coupler Inline Wattmeter 50-ohms Dummy Load Frequency Counter Frequency Counte

25、r 7.5 V DC Regulated Power Supply RF Signal Generator 8-ohms Dummy Load SINAD Meter MICGND TC1001 12FT-250R Technical Supplement PLL VCV (Varactor Control Voltage) ? Connect the DC voltmeter between test point TP1014 on the Main Unit and chassis ground. ? Set the transceiver to 136 MHz, and confirm

26、about 0.4V 1.0V on the voltmeter. ? Set the transceiver to 146 MHz, and confirm about 1.0V 1.6V on the voltmeter. ? Set the transceiver to 174 MHz, and confirm about 2.9V 4.3V on the voltmeter. ? Select 136 MHz, and this time key the transmitter; now confirm about 0.8V 1.3V on the voltmeter. ? Set t

27、he transceiver to 146 MHz, and this time key the transmitter; now confirm about 1.3V 1.9V on the volt- meter. ? Set the transceiver to 174 MHz, and this time key the transmitter; now confirm about 2.9V 4.3V on the volt- meter. Internal System Alignment Routine This procedure uses a routine programme

28、d in the trans- ceiver that simplifies many previously complex adjust- ments with digitally controlled settings via front panel buttons and LCD indications. Internal Alignment System Startup Procedure ? To begin, set the transceiver to the 146.0000 MHz, and turn the transceiver off. ? Next, press an

29、d hold in the PTT, MONI and the LAMP switches; hold them in while turning the ra- dio on. ? Press the keypad in following sequence while press and holding the LAMP key. ? ? 1 ? 4 ? 0 ? 1 ? Press the PTT switch to enter the alignment routine. ? To exit the alignment routine when adjustments are compl

30、ete, just turn the radio off. Low-Scale S-1 Adjustment ? Adjust the signal generator level to -5 dB, then hold in the LAMP and press the ? key. S-Meter Full-Scale Adjustment ? Adjust the signal generator level to +23 dB, then hold in the LAMP and press the ? key. Transmitter Output Power ? Set the t

31、ransceiver output power to LOW. ? Transmit, and press and hold in the LAMP key. ? Rotate the DIAL so as to achieve 0.47W (0.05W) on the wattmeter. ? Set the transceiver output power to MID. ? Transmit, and press and hold in the LAMP key. ? Rotate the DIAL so as to achieve 2.1W (0.1W) on the wattmete

32、r. ? Set the transceiver output power to HIGH. ? Transmit, and press and hold in the LAMP key. ? Rotate the DIAL so as to achieve 5.2W (0.1W) on the wattmeter. Alignment TP1014 13FT-250R Technical Supplement CTCSS Deviation Adjustment ? Activate the CTCSS encoder with a 107.2-Hz tone. ? Transmit, an

33、d press and hold in the LAMP key. ? Rotate the DIAL so as to achieve a 0.7 kHz (0.05 kHz) reading (narrow: 0.5 kHz) on the deviation meter. DCS Deviation Adjustment ? Activate the DCS encoder/decoder with an 023 code. ? Transmit, and press and hold in the LAMP key. ? Rotate the DIAL so as to achieve

34、 a 0.7 kHz (0.05 kHz) reading (narrow: 0.5 kHz) on the deviation meter. Transmitter Total Deviation ? Select 146 MHz, and adjust the AF generator attenua- tor for 80-mV output at 1 kHz to the microphone jack. ? Key the transmitter, and adjust VR1002 on the Main Unit for 4.2 kHz deviation on the devi

35、ation meter (100 Hz). DC Voltmeter ? Set the power supply voltage to 9.6 V. ? Press and hold in the LAMP and REV key. VR1002 Receiver Sensitivity With 146 MHz selected, tune the RF signal generator to the same frequency, and set the generator level to -8 dB, and confirm about 12dB SINAD on the SINAD

36、 Meter. Alignment 14FT-250R Technical Supplement Alignment Note: 15 MAIN Unit FT-250R Technical Supplement Circuit Diagram 3.0 V SQL ON:0 V 6.7 V SQL ON:0 V 6.9 V SQL ON:7.0 V 6.1 V SQL ON:7.0 V 6.8 V SQL ON:7.0 V 3.5 V SQL ON:7.0 V 3.3 V SQL ON:0 V 2.6 V SQL ON:0 V 2.75 V SQL ON:0 V 4.4 V (4.4 V) 4

37、.4 V (4.3 V) 5.1 V (5.0 V) 5.2 V (5.1 V) 3.4 V (3.4 V) 3.3 V (3.3 V) 0.0 V (0.0 V) 0.6 V (0.5 V) 0.6 V (0.0 V) 3.1 V (3.1 V) 5.2 V (5.1 V) 0.7 V (0.7 V) 1.3 V (1.3 V) 2.0 V (2.0 V) 4.2 V (4.2 V) 5.2 V (3.1 V) 4.3 V 3.5 V (3.5 V) 0.5 V (0.5 V) 0.6 V (0.4 V) 2.9 V (2.8 V) 0 V (3.6 V) 3.7 V (0 V) 0 V (

38、1.4 V) 0 V (0.7 V) 0 V (4.4 V) 7.0 V (6.8 V) 6.7 V 5.1 V (0 V) 0 V (4.9 V) 2.3 V (5.1 V) 4.9 V (0 V) 5.2 V (4.3 V) 1.6 V (1.6 V) 3.3 V (3.3 V) 1.0 V (2.7 V) 0 V (3.3 V) 5.2 V (3.1 V) 5.2 V (5.1 V) 3.4 V (3.4 V) 3.4 V (3.4 V) 2.8 V (2.8 V) 3.4 V (0 V) (0.5 V) 5.2 V (4.5 V) 5.2 V (0 V) 3.3 V (0 V) 7.0

39、 V (6.8 V) 3.4 V (3.4 V) 3.4 V (3.4 V) 5.2 V (5.1 V) 2.4 V (2.3 V) 2.9 V (2.8 V) 0 V (0.6 V) 1.2 V (1.1 V) 0 V (3.2 V) TONE SQL 67.0 Hz - 151.4 Hz:3.1 V 156.7 Hz - 250.3 Hz:0 V DCS:3.1 V Wide:0 V Narrow:0.6 V CHG OFF:7.2 V ON:6.4 V CHG OFF:7.0 V ON:5.7 V CHG OFF:7.0 V ON:0 V 7.0 V (6.8 V) 6.7 V 7.0

40、V (6.8 V) 6.6 V 7.0 V (6.8 V) 6.7 V 7.0 V (0 V) 0 V 0 V (2.8 V) 4.3 V 0 V (1.7 V) 0.6 V (0.0 V) 4.7 V (0.0 V) 2.3 V (0.0 V) 0.7 V (0.0 V) 0.0 V (0.6 V) 0.6 V (0.0 V)0.0 V (1.7 V) 2.8 V 4.9 V (0.0 V) 4.1 V (0.0 V) 0.7 V (0.0 V) 0.7 V (0.0 V) Wide:0.0 V Narrow:0.6 V Wide:0.6 V Narrow:0.0 V 3.0 V (3.0

41、V) 3.4 V (3.4 V) MON/LAMP SW OFF:3.3 V MON SW ON:2.1 V LAMP SW ON:1.7 V 0.0 V (3.4 V) Shift ON:3.3 V OFF:0.0 V Wide:0.0 V Narrow:3.3 V Shift ON:1.6 V OFF:1.5 V Shift ON:2.2 V OFF:0.0 V 3.4 V (3.4 V) LAMP ON:1.8 V OFF:0.0 V LAMP ON:1.1 V OFF:0.0 V LAMP ON:3.0 V OFF:5.6 V LAMP ON:3.0 V OFF:5.6 V LAMP

42、ON:2.7 V OFF:5.6 V LAMP ON:5.0 V OFF:5.6 V 3.3 V (0.0 V) 2.7 V (0.0 V) 0.0 V (2.7 V) 0.0 V (3.3 V) 4.1 V (5.0 V) 4.9 V (4.7 V) RX (TX Power Output 0.5 W) TX Power Output 5 W RX Frequency 146.05 MHz (with 3 kHz at 1 kHz tone) Audio Output 0.2 W AF Dummy Load Impedance 8-ohm 16 MAIN Unit FT-250R Techn

43、ical Supplement 17 MAIN Unit FT-250R Technical Supplement Parts Layout (Side A) BADCFEG 1 3 2 4 DA221 (K) (D1007, 1017, 1019) DAN222 (N) (D1025, 1026) 2SB1132 (BA) (Q1063, 1078) DTA144EE (16) (Q1052) 2SA1774 (FR) (Q1068) M3826AEFGP (Q1035) 2SC4081 (Q1015, 1016, 1037, 1038, 1041, 1042, 1044, 1056) 2S

44、C4400 (Q1014) TA31136FN (Q1017) 2SB1132Q (Q1047) RD07MVS1A (Q1008) UMW1 (W1) (Q1048) S-80835CNNB (Q1039) S-812C33AUA-C2N-T2 (Q1051) 18 MAIN Unit FT-250R Technical Supplement Parts Layout (Side B) badcfe g 1 3 2 4 2SA1586Y (Q1027) 2SA1774 (FR) (Q1032) MB15A01PFV1 (Q1030) DA221 (K) (D1027) 2SK3074 (WA

45、) (Q1009) 3SK296ZQ (ZQ) (Q1013) SB40W03T (D1028) DAN235E (M) (D1008) AA1101F (D1024) 02CZ2.0X (2.0X) (D1029) 2SD1664 (DA) (Q1057) 2SC4154 (Q1001, 1002, 1006, 1007, 1025, 1031, 1034, 1036, 1040, 1055, 1059, 1061, 1063, 1065) 2SC5006 (Q1011) 2SC4617 (BR) (Q1043) 2SC5226 (Q1010) 2SC5374 (Q1018, 1019, 1

46、022, 1023) UMG2N (Q1062) UMZ2N (Q1054) NJM2904V (Q1003) NJM2902V (Q1060, 1064) DTA143XE (Q1026) 2SB1132Q (Q1045, 1067) DTA114EE (14) (Q1004, 1005) DTA144TE (96) (Q1020) DTA114TE (94) (Q1024, 1033) UMW1 (W1) (Q1028, 1046) TDA2822D (Q1053) BR24L64F (Q1058) 19 MAIN Unit FT-250R Technical Supplement PCB

47、 with ComponentsCS2034401VX-250RUSA A2 CS2034404VX-250REXP B3 CS2034405VX-250REXP A1 CS2034406VX-250REXP A3 Printed Circuit BoardFR020090A C 1001CHIP CAP.15pF50VCHGRM1882C1H150JA01DK221742151-Ba1 C 1002CHIP CAP.5pF50VCHGRM1882C1H5R0CZ01DK221742061-Ba1 C 1003CHIP CAP.22pF50VCHGRM1882C1H220JA01DK22174

48、2191-Ba1 C 1004CHIP CAP.4pF50VCHGRM1882C1H4R0CZ01DK221742051-Ba1 C 1005CHIP CAP.0.001uF50VBGRM188B11H102KA01DK221748211-Ba1 C 1006CHIP CAP.22pF50VCHGRM1882C1H220JA01DK221742191-Ba1 C 1007CHIP CAP.27pF50VCHGRM1882C1H270JA01DK221742211-Bb1 C 1008CHIP CAP.0.001uF50VBGRM155B11H102KA01DK221788091-Bb1 C 1

49、009CHIP CAP.0.001uF50VBGRM188B11H102KA01DK221748211-Bb1 C 1010CHIP CAP.0.047uF10VBGRM155B11A473KA01DK221088011-Bc2 C 1011CHIP CAP.0.001uF50VBGRM188B11H102KA01DK221748211-Bd2 C 1012CHIP CAP.100pF50VCHGRM1882C1H101JA01DK221742351-Bc2 C 1013CHIP CAP.0.1uF16VBGRM188B11C104KA01DK221248051-Bb2 C 1014CHIP CAP.100pF50VCHGRM1882C1H101JA01DK221742351-Bc2 C 1016CHIP TA.CAP.10uF10VTEESVA1A106M8RK781000281-Bd2 C 1017C