FT950.pdf

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1、Specifications-1 FT-950 Technical Supplement Introduction Specifications Exploded View Block Diagram Connection Diagram WIRE ASSY List Alignment Board Unit (Schematics, Layouts realign- ment may be required after the faulty components have been replaced. We recommend that authorized Vertex Standard

2、Technicians, who are experienced with the circuitry and fully equipped to repair and align our products, perform repairs. If a fault is suspected, contact the selling dealer for instructions regarding repair. Au- thorized Vertex Standard Technicians have the lat- est information to align all circuit

3、s and make com- plete performance checks to ensure compliance with factory specifications after repairs. Those who do undertake any of the following align- ments are cautioned and proceed at their own risk. Problems caused by unauthorized attempts at re- alignment are not covered by the warranty pol

4、icy. Vertex Standard must reserve the right to change circuits and alignment procedures in the interest of improved performance, without notifying owners. Under no circumstances should any alignment be attempted unless the normal functions and opera- tion of the transceiver are clearly understood, t

5、he cause of the malfunction has been clearly identified and all faulty components replaced. The need for realignment should be determined to be absolutely necessary. The following test equipment (and a thorough fa- miliarity with its correct use) is necessary for correct realignment. Most steps do n

6、ot require all of the equipment listed. The interactions of some adjust- ments may require that more complex adjustments be performed in a sequence. Do not attempt to per- form only a single step unless it is clearly isolated electrically from all other steps. Have all test equip- ment ready before

7、beginning, and follow all of the steps in a section in the order they are presented. Required Test Equipment ? RF Signal Generator ? AF Signal Generator ? Spectrum Analyzer good to at least 1 GHz. ? Frequency Counter ? SINAD Meter ? RF Millivoltmeter ? Electronic Load ? Digital DC Voltmeter (high-Z,

8、 1 M-Ohm/V) ? DC Voltmeter ? DC Ammeter (20 A) ? Ohmmeter ? DMU-2000 Data Management Unit ? 50-Ohm Dummy Load (100 watts) ? In-Line Wattmeter (100 watts, 50-Ohm) ? Linear Detector ? RF Coupler ? 4-Ohm AF Dummy Load (3 watts) ? 1/4-inch 3-contant Plug Alignment Preparation & Precautions A 50-ohm RF D

9、ummy load and in-line wattmeter must be connected to the “ANT 1” jack in all proce- dures that call for transmission, except where speci- fied otherwise. Correct alignment is not possible with an antenna. After completing one step, read the following step to determine whether the same test equipment

10、 will be required. If not, remove the unneeded test equip- ment before proceeding. (except the dummy load and wattmeter). Correct alignment requires that the ambient temper- ature be maintained constant between 68 F 86 F (20 C 30 C). When the transceiver is brought into the shop from a hot or cold e

11、nvironment, it should be allowed time to come to room temperature be- fore alignment. Also, the test equipment must be thoroughly warmed up before beginning. Whenever possible, alignments should be made with oscillator shields and circuit boards firmly affixed in place. Note:Signal levels in dB refe

12、rred to in this proce- dure are based on 0 dB = 0.5 V (closed cir- cuit). Important Notice Do not adjust the alignment menus that are not mentioned in this manual. ALIGNMENT-2 Alignment FT-950 Technical Supplement VDD Meter Adjustment ? Connect the DC voltmeter to pin 6 of J5402 on the PA-A Unit. ?

13、Switch the external display to “SWR Monitor” page. ? Press and hold in the 1.8(1), 3.5(2), and 7(3) keys, while turning the radio on, to enter the alignment mode. ? Rotate the Main Tuning Dial knob to select the alignment parameter “B-01 vdd”. ? Press the ENT key, then rotate the CLAR(VFO- B) knob s

14、o that the VDD meter reading is the same as that on the DC voltmeter. ? Rotate the Main Tuning Dial knob to select the alignment parameter “B-02 vdd”. ? Rotate the CLAR(VFO-B) knob so that the VDD meter (on the external display) reading is same as that on the DC voltmeter. ? Press and hold in the ME

15、NU button for one sec- ond to save the new setting and exit the align- ment mode. PA-A UNIT ALIGNMENT POINTS TP5032 Pin 6 of J5402 ALIGNMENT-3 Alignment FT-950 Technical Supplement 2nd Local Oscillator Adjustment ? Disconnect the coaxial cable from J4005 on the LOCAL Unit, then connect the Frequency

16、 counter to J4005. ? Press and hold in the 1.8(1), 3.5(2), and 7(3) keys, while turning the radio on, to enter the alignment mode. ? Rotate the Main Tuning Dial knob to select the alignment parameter “C-08 FrE”. ? Rotate the CLAR(VFO-B) knob so that the Fre- quency counter reading is “69.000 MHz”. ?

17、 Press and hold in the MENU button for one sec- ond to save the new setting and exit the align- ment mode. ? Disconnect the Frequency counter from J4005, then connect the RF millivoltmeter to J4005. ? Adjust T4003, T4004, and T4005 on the LOCAL Unit for maximum deflection on the RF millivoltmeter (m

18、ore than 0 dBm). ? Disconnect the RF millivoltmeter from J4005, then re-connect the coaxial cable to J4005. PLL Adjustment ? Connect the Digital DC voltmeter (high-Z) to TP4005 on the LOCAL Unit. ? Disconnect the coaxial cable from J4002 on the LOCAL Unit, then connect the RF millivoltmeter to J4002

19、. ? Press and hold in the 1.8(1), 3.5(2), and 7(3) keys, while turning the radio on, to enter the alignment mode. ? Referring to the table below, select the appropri- ate “Alignment Parameter” using the Main Tun- ing Dial knob per the chart below, and adjust the listed components for the required vo

20、ltage, or confirm that the correct voltage is present on each alignment parameter. ? Disconnect the RF millivoltmeter from J4002, then re-connect the coaxial cable to J4002. ? Press and hold in the MENU button for one sec- ond to save the new setting and exit the align- ment mode. LOCAL UNIT ALIGNME

21、NT POINTS ALIGNMENT PARAMETER A-01 V1H A-02 V1L A-03 V2H A-04 V2L A-05 V3H A-06 V3L A-07 V4H A-08 V4L ADJUST / CONFIRM Adjust TC4004 Confirm Adjust TC4003 Confirm Adjust TC4002 Confirm Adjust TC4001 Confirm DC VOLTMETER 5.0 V 0.1 V At least 0.7 V 5.0 V 0.1 V At least 0.7 V 5.0 V 0.1 V At least 0.7 V

22、 5.0 V 0.1 V At least 0.7 V RF MILLIVOLTMETER At least 3 dBm At least 3 dBm At least 3 dBm At least 3 dBm At least 3 dBm At least 3 dBm At least 3 dBm At least 3 dBm T4003 T4004 J4005 T4005 J4002 TC4002 TC4003 TC4004 TC4001 TP4005 ALIGNMENT-4 Alignment FT-950 Technical Supplement Main Receiver Adjus

23、tment 1st Local Oscillator Adjustment ? Set the following controls as indicated: ANT 1-2 button: ANT 1 IPO button: AMP1 ATT button: OFF -TUNE button: THRU R.FLT button: AUTO AGC button: AUTO RF GAIN knob: Fully clockwise MODE button: CW ? Connect the RF millivoltmeter to TP1049 on the MAIN Unit. ? P

24、ress and hold in the 1.8(1), 3.5(2), and 7(3) keys, while turning the radio on, to enter the alignment mode. ? Rotate the Main Tuning Dial knob to select the alignment parameter “C-03 L7”. ? Rotate the CLAR(VFO-B) knob so that the RF millivoltmeter reading is “1.0 Vrms 0.05 V”, then press the ENT ke

25、y. ? Rotate the Main Tuning Dial knob to select the alignment parameter “C-04 L14”. ? Rotate the CLAR(VFO-B) knob so that the RF millivoltmeter reading is “0.6 Vrms 0.05 V”, then press the ENT key. ? Rotate the Main Tuning Dial knob to select the alignment parameter “C-07 L50”. ? Rotate the CLAR(VFO

26、-B) knob so that the RF millivoltmeter reading is “0.7 Vrms 0.05 V”, then press the ENT key. ? Press and hold in the MENU button for one sec- ond to save the new settings and exit the align- ment mode. MAIN UNIT (RECEIVER SECTION ) A LIGNMENT POINTS T1011 T1026 T1033 T1037 TP1059 T1030 T1024 T1025 T

27、1031 T1032 T1019 TP1049 J1028 TP1035 T1029 T1028 T1022 T1023 T1027 TP1055 T1034 TP1063 ALIGNMENT-5 Alignment FT-950 Technical Supplement 2nd/3rd Local Level Adjustment ? Connect the RF millivoltmeter to TP1063 on the MAIN Unit. ? Adjust T1034 on the MAIN Unit for maximum deflection on the RF millivo

28、ltmeter (more than +8 dBm). ? Connect the RF millivoltmeter to TP1055 on the MAIN Unit. ? Adjust T1028 on the MAIN Unit for maximum deflection on the RF millivoltmeter (more than 0 dBm). IF Transformer Adjustment ? Set the VFO-A frequency to 14.200 MHz in the CW mode. ? Set the following controls as

29、 indicated: ANT 1-2 button: ANT 1 IPO button: AMP1 ATT button: OFF -TUNE button: THRU R.FLT button: 6 kHz AGC button: AUTO RF GAIN knob: Fully clockwise ? Connect the AF millivoltmeter and 4 Ohm dummy load to the EXT SP jack. ? Connect the RF Signal Generator to the “ANT 1” jack, then set the output

30、 level to 0 dB at the 14.200 MHz. ? Adjust T1025, T1032, T1037, T1030, T1027, and T1022 on the MAIN Unit in succession several times for maximum deflection on the AF millivoltmeter. Note: 1) If the S-meter deflects while adjusting, re- duce the RF Signal Generator output so that the S- meter does no

31、t deflect. 2) There are two peak points in the T1025 and T1032 adjustments. Adjust T1025 and T1032 so the cores are in the upper part of the coil. MCF Adjustment (1) ? Set the VFO-A frequency to 14.200 MHz in the CW mode. ? Set the following controls as indicated: ANT 1-2 button: ANT 1 IPO button: A

32、MP1 ATT button: OFF -TUNE button: THRU R.FLT button: 3 kHz AGC button: AUTO RF GAIN knob: Fully clockwise ? Connect the AF millivoltmeter and 4 Ohm dummy load to the EXT SP jack. ? Connect the RF Signal Generator to the “ANT 1” jack, then set the output level to 0 dB at the 14.200 MHz. ? Adjust T102

33、6 and T1033 on the MAIN Unit in succession several times for maximum deflection on the AF millivoltmeter. Note: 1) If the S-meter deflects while adjusting, re- duce the RF Signal Generator output so that the S- meter does not deflect. 2) There are two peak points in the T1026 and T1033 adjustments.

34、Adjust T1026 and T1033 so the cores are in the upper part of the coil. IF Trap Adjustment ? Set the VFO-A frequency to 50.000 MHz in the CW mode. ? Set the following controls as indicated: ANT 1-2 button: ANT 1 IPO button: AMP1 ATT button: OFF -TUNE button: THRU R.FLT button: AUTO AGC button: AUTO R

35、F GAIN knob: Fully clockwise ? Connect the AF millivoltmeter and 4 Ohm dummy load to the EXT SP jack. ? Connect the RF Signal Generator to the “ANT 1” jack, then set the output level to +60 +90 dB at the 69.450 MHz. ? Adjust T1011 on the MAIN Unit for minimum deflection on the AF millivoltmeter. Not

36、e: If the S-meter deflects while adjusting, reduce the RF Signal Generator output so that the S-meter does not deflect. ALIGNMENT-6 Alignment FT-950 Technical Supplement MCF Adjustment (2) ? Press and hold in the 1.8(1), 3.5(2), and 7(3) keys, while turning the radio on, to enter the alignment mode.

37、 ? Rotate the Main Tuning Dial knob to select the alignment parameter “G-03 FnG”. ? Rotate the CLAR(VFO-B) knob so that the Mult- Display Window shows “80”. ? Press and hold in the MENU button for one sec- ond to save the new setting and exit the align- ment mode. ? Set the VFO-A frequency to 50.000

38、 MHz in the FM mode. ? Set the following controls as indicated: ANT 1-2 button: ANT 1 IPO button: AMP2 ATT button: OFF -TUNE button: THRU R.FLT button: 15 kHz AGC button: AUTO RF GAIN knob: Fully clockwise ? Connect the SINAD meter and 4 Ohm dummy load to the EXT SP jack. ? Connect the RF Signal Gen

39、erator to the “ANT 1” jack, then set the output level to 10 0 dB at the 50.000 MHz with 3.5 kHz deviation FM modulation of a 1 kHz audio signal. ? Adjust T1024 and T1031 on the MAIN Unit in succession several times for maximum deflection on the SINAD meter. ? Adjust T1022 on the MAIN Unit in success

40、ion several times for maximum deflection on the SINAD meter. Note: Do not adjust T1022 more than 45 degrees rotation. Noise Blanker Circuit Adjustment ? Set the VFO-A frequency to 14.200 MHz in the CW mode. ? Set the following controls as indicated: ANT 1-2 button: ANT 1 IPO button: AMP1 ATT button:

41、 OFF -TUNE button: THRU R.FLT button: AUTO AGC button: AUTO NB button: ON (for short-duration pulse noise) RF GAIN knob: Fully clockwise ? Connect the Digital DC voltmeter (high-Z) to TP1059 on the MAIN Unit. ? Connect the RF Signal Generator to the “ANT 1” jack, then set the output level to 30 dB a

42、t 14.200 MHz. ? Adjust T1029 and T1023 on the MAIN Unit for minimum deflection on the DC voltmeter. ? Turn the NB to “OFF” by pressing the NB but- ton. Scope Circuit Adjustment ? Set the VFO-A frequency to 14.200 MHz in the CW mode. ? Set the following controls as indicated: ANT 1-2 button: ANT 1 IP

43、O button: AMP1 ATT button: OFF -TUNE button: THRU R.FLT button: AUTO AGC button: AUTO RF GAIN knob: Fully clockwise ? Disconnect the coaxial cable from J1028 on the MAIN Unit, then connect the RF millivoltmeter to J1028. ? Connect the RF Signal Generator to the “ANT 1” jack, then set the output leve

44、l to 80 dB at 14.200 MHz. ? Adjust T1019 on the MAIN Unit for maximum deflection on the RF millivoltmeter. ? Disconnect the RF millivoltmeter from J1028, then re-connect the coaxial cable to J1028. ALIGNMENT-7 Alignment FT-950 Technical Supplement RF AGC Adjustment ? Set the following controls as in

45、dicated: ANT 1-2 button: ANT 1 IPO button: AMP1 ATT button: OFF -TUNE button: THRU R.FLT button: 6 kHz AGC button: AUTO RF GAIN knob: Fully clockwise MODE button: CW ? Connect the Digital DC voltmeter (high-Z) to TP1035 on the MAIN Unit. ? Press and hold in the 1.8(1), 3.5(2), and 7(3) keys, while t

46、urning the radio on, to enter the alignment mode. ? Rotate the Main Tuning Dial knob to select the alignment parameter “D-05 rGc”. ? Note the Digital DC voltmeter reading (with no receive signal). ? Rotate the CLAR(VFO-B) knob counter-clock- wise just to the point where the Digital DC volt- meter re

47、ading is 0.01 V less than the voltage noted in the previous step. ? Rotate the CLAR(VFO-B) knob clockwise just to the point where the Digital DC voltmeter read- ing is the same as the previously noted voltage, then press the ENT key. ? Press and hold in the MENU button for one sec- ond to save the n

48、ew setting and exit the align- ment mode. RF SIGNAL GENERATOR 1.900 MHz, 9 dB 3.750 MHz, 9 dB 7.150 MHz, 9 dB 10.125 MHz, 9 dB 14.175 MHz, 9 dB 18.117 MHz, 9 dB 21.255 MHz, 9 dB 24.940 MHz, 9 dB 28.850 MHz, 9 dB 52.000 MHz, 9 dB ALIGNMENT PARAMETER E-01 iGn E-02 iGn E-03 iGn E-04 iGn E-05 iGn E-06 i

49、Gn E-07 iGn E-08 iGn E-09 iGn E-10 iGn VFO-A FREQUENCY 1.900 MHz 3.750 MHz 7.150 MHz 10.125 MHz 14.175 MHz 18.117 MHz 21.255 MHz 24.940 MHz 28.850 MHz 52.000 MHz AF MILLIVOLTMETER 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) 1.5 dB (0.5 dB) IF Gain Adjustment ? Set the VFO-A frequency to 1.900 MHz in the CW mode. ? Set the following controls as indicated: ANT 1-2 button: ANT 1 IPO button: AMP1 ATT button: OFF -TUNE button: THRU R.FLT button: 6 kHz AGC button: AUTO RF GAIN knob: Fully cl