FT450.pdf

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1、Introduction This manual provides technical information necessary for servicing the FT-450 HF/50 MHz Transceiver. Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qual- ified persons to service this equipment may result in per- manent damage not

2、covered by the warranty, and may be illegal in some countries. Two PCB layout diagrams are provided for each double- sided circuit board in the Transceiver. Each side of is re- ferred to by the type of the majority of components in- stalled on that side (“leaded” or “chip-only”). In most cases one s

3、ide has only chip components, and the other has either a mixture of both chip and leaded components (trimmers, coils, electrolytic capacitors, ICs, etc.), or lead- ed components only. While we believe the technical information in this manu- al to be correct, VERTEX STANDARD assumes no liabili- ty fo

4、r damage that may occur as a result of typographi- cal or other errors that may be present. Your cooperation in pointing out any inconsistencies in the technical infor- mation would be appreciated. 2007 VERTEX STANDARD CO., LTD. Technical Supplement HF/50 MHz TRANSCEIVER FT-450 Contents Specificatio

5、ns Exploded View realign- ment may be required after the faulty components have been replaced. We recommend that authorized Vertex Standard 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 s

6、elling dealer for instructions regarding repair. Au- thorized Vertex Standard Technicians have the lat- est information to align all circuits and make com- plete performance checks to ensure compliance with factory specifications after repairs. Those who undertake the following alignments are cautio

7、ned to proceed at their own risk. Problems caused by unauthorized attempts at realignment are not covered by the warranty policy. Vertex Standard must reserve the right to change circuits and alignment procedures in the interest of improved performance, without notifying owners. Under no circumstanc

8、es should any alignment be attempted unless the normal functions and opera- tion of the transceiver are clearly understood, the cause of the malfunction has been clearly identified and all faulty components replaced. The need for realignment should be determined to be necessary. The following test e

9、quipment (and a thorough fa- miliarity with its correct use) is necessary for correct alignment. Most steps do not require all of the equip- ment listed. The interactions of some adjustments may require that several adjustments be performed in a sequence. Do not attempt to perform only a sin- gle st

10、ep 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 they are presented. Required Test Equipment ? RF Signal Generator ? AF Signal Generator ? Spectrum Analyzer good to at least 1 GHz

11、. ? Frequency Counter ? SINAD Meter ? RF Millivoltmeter ? Digital DC Voltmeter (high-Z, 1 M-Ohm/V) ? DC Voltmeter ? DC Ammeter (20 A) ? Ohmmeter ? 50-Ohm Dummy Load (100 watts) ? 16.6-Ohm Dummy Load (100 watts) ? In-Line Wattmeter (100 watts, 50-Ohm) ? Linear Detector ? RF Coupler ? 4-Ohm AF Dummy L

12、oad (3 watts) Alignment Preparation adjust T2018, T2019, T2021, and T2022 on the RF-IF-Unit for maximum de- flection on the RF millivoltmeter. ? Disconnect the RF millivoltmeter and 50 Ohm dummy load from J2002 on the RF-IF-Unit, then re-connect the TMP plug to J2002. ALIGNMENT-3 Alignment TP2006 TP

13、2001TP2009T2017 X2001T2019 T2018T2022 T2021 J2002 T2020 L2066 L2065 L2067 L2068 RF-IF UNIT ALIGNMENT POINTS ALIGNMENT-4 Alignment PA Unit Preparation ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT jack. ? Cut the lead of L5008 on the PA Unit. ? Set VR5401, VR5402, VR5403, and VR5404 on t

14、he PA Unit to fully counter clockwise position. ? Set the transceiver to 14.150 MHz in the USB mode. Pre-Drive Stage Idling Current ? Disconnect the jumper plug from J5003 on the PA Unit, and then connect the DC ammeter to J5003. ? Press the PTT button; adjust VR5401 on the PA Unit so the DC ammeter

15、 reading is 100 mA 10 mA. ? Release the PTT button. Drive Stage Idling Current ? Disconnect the jumper plug from J5004 on the PA Unit, and then connect the DC ammeter to J5004. ? Press the PTT button; adjust VR5402 on the PA Unit so that the DC ammeter reading is 0.5 A 50 mA. ? Release the PTT butto

16、n. ? Press the PTT button; adjust VR5403 on the PA Unit so the DC ammeter reading is 1.0 A 50 mA. ? Release the PTT button. Final Stage Idling Current ? Connect the DC ammeter to the lead of L5008. ? Press the PTT button; adjust VR5404 on the PA Unit so the DC ammeter reading is 1.0 A 100 mA. ? Rele

17、ase the PTT button. ? Press the PTT button; adjust VR5405 on the PA Unit so the DC ammeter reading is 2.0 A 100 mA. ? Release the PTT button. Concluding ? Re-connect the jumper plugs to J5003 and J5004, and then solder the lead of L5008. CM Coupler Balance ? Connect the DC voltmeter between TP5430 (

18、+ lead) on the PA Unit and Chassis (- lead). ? Set the transceiver to 29.200 MHz in the CW mode. ? Press the PTT switch; adjust TC5400 on the PA Unit for minimum deflection on the DC voltme- ter (less than 0.1 V). ? Release the PTT switch. ALIGNMENT-5 Alignment TC5400 VR5403 L5008 VR5401 VR5402VR540

19、4VR5405 J5004 J5003 TP5430 PA UNIT ALIGNMENT POINTS ALIGNMENT-6 Alignment Software Adjustment Preparation ? Set the VFO frequency for each band as indicated: ? Set the following controls as indicated: IPO button: OFF ATT button: OFF AGC button: AUTO SHIFT knob: 12-oclock position AF GAIN knob: 12-oc

20、lock position RF GAIN knob: Fully clockwise MODE: CW CONTOUR: OFF NOTCH: OFF DNR: OFF S-meter Adjustment ? Connect the RF Signal Generator to the ANT jack. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Select the appropriate Alignmen

21、t Parameter using the DSP/SEL knob per the chart below, then set the RF Signal Generator output to each level, and adjust the MAIN DIAL knob for the corresponding S-meter deflection. ALC Adjustment ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT jack. ? Press and hold in the ATT/IPO, NB,

22、and AGC buttons, while turning the radio on, to enter the alignment mode. ? Rotate the DSP/SEL knob to select the align- ment parameter I-ALC1. ? Press the PTT switch, then rotate the MAIN DIAL knob for 140 W 10 W on the Wattmeter. Note the alignment value which is displayed on the frequency display

23、 area of the LCD. ? Release the PTT switch. ? Rotate the DSP/SEL knob to select the align- ment parameter I-ALC2. ? Press the PTT switch, then rotate the MAIN DIAL for 110 W 5 W on the Wattmeter. Release the PTT switch. ? Rotate the DSP/SEL knob to select the align- ment parameter I-ALC3. ? Rotate t

24、he MAIN DIAL knob to set an alignment value to same value, which was noted in the pre- vious step (I_ALC1). ? Press and hold in the F button for 2 seconds to save the new setting and exit from the alignment mode. Power Adjustment (100 W) ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT jac

25、k. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Select the appropriate Alignment Parameter using the DSP/SEL knob per the chart below, and adjust the MAIN DIAL knob for the corre- sponding Wattmeter deflection while pressing the PTT

26、 switch. OPERATING BAND General Band 1.8 MHz Band 3.5 MHz Band 7 MHz Band 14 MHz Band 21 MHz Band 28 MHz Band 50 MHz Band FREQUENCY 1.200 MHz 1.900 MHz 3.750 MHz 7.150 MHz 14.175 MHz 21.255 MHz 28.850 MHz 52.000 MHz ? Press and hold in the F button for 2 seconds to save the new settings and exit fro

27、m the alignment mode. S-METER S-1 (3 dots) S-1 (3 dots) S-1 (3 dots) S-1 (3 dots) S-1 (3 dots) S-1 (3 dots) S-1 (3 dots) S-1 (3 dots) ALIGNMENT PARAMETER SMADJ0 SMADJ1 SMADJ2 SMADJ3 SMADJ4 SMADJ5 SMADJ6 SMADJ RF SIGNAL GENERATOR 1.200 MHz, 32 dB 1.900 MHz, 12 dB 3.750 MHz, 12 dB 7.150 MHz, 12 dB 14.

28、175 MHz, 12 dB 21.255 MHz, 12 dB 28.850 MHz, 12 dB 52.000 MHz, 12 dB ALIGNMENT PARAMETER 1PO100 2PO100 3PO100 4PO100 5PO100 6PO100 7PO100 WATTMETER 100 W 2 W 100 W 2 W 100 W 2 W 100 W 2 W 100 W 2 W 90 W 2 W 100 W 2 W ? Press and hold in the F button for 2 seconds to save the new settings and exit fr

29、om the alignment mode. ALIGNMENT-7 Alignment Power Adjustment (50 W) ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT jack. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Select the appropriate Alignment Parameter using the

30、DSP/SEL knob per the chart below, and adjust the MAIN DIAL knob for the corre- sponding Wattmeter deflection while pressing the PTT switch. Power Adjustment (10 W) ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT jack. Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the r

31、adio on, to enter the alignment mode. Select the appropriate Alignment Parameter using the DSP/SEL knob per the chart below, and adjust the MAIN DIAL knob for the corre- sponding Wattmeter deflection while pressing the PTT switch. ALIGNMENT PARAMETER 1PO 50 2PO 50 3PO 50 4PO 50 5PO 50 6PO 50 7PO 50

32、WATTMETER 50 W 2 W 50 W 2 W 50 W 2 W 50 W 2 W 50 W 2 W 50 W 2 W 50 W 2 W ? Press and hold in the F button for 2 seconds to save the new settings and exit from the alignment mode. Power Adjustment (20 W) ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT jack. ? Press and hold in the ATT/IPO,

33、 NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Select the appropriate Alignment Parameter using the DSP/SEL knob per the chart below, and adjust the MAIN DIAL knob for the corre- sponding Wattmeter deflection while pressing the PTT switch. ALIGNMENT PARAMETER 1PO 20

34、 2PO 20 3PO 20 4PO 20 5PO 20 6PO 20 7PO 20 WATTMETER 20 W 2 W 20 W 2 W 20 W 2 W 20 W 2 W 20 W 2 W 20 W 2 W 20 W 2 W ALIGNMENT PARAMETER 1PO 10 2PO 10 3PO 10 4PO 10 5PO 10 6PO 10 7PO 10 WATTMETER 10 W 1 W 10 W 1 W 10 W 1 W 10 W 1 W 10 W 1 W 10 W 1 W 10 W 1 W ALIGNMENT PARAMETER 1PO 5 2PO 5 3PO 5 4PO

35、5 5PO 5 6PO 5 7PO 5 WATTMETER 5 W 1 W 5 W 1 W 5 W 1 W 5 W 1 W 5 W 1 W 5 W 1 W 5 W 1 W ? Press and hold in the F button for 2 seconds to save the new settings and exit from the alignment mode. ? Press and hold in the F button for 2 seconds to save the new settings and exit from the alignment mode. Po

36、wer Adjustment (5 W) ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT jack. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Select the appropriate Alignment Parameter using the DSP/SEL knob per the chart below, and adjust the

37、 MAIN DIAL knob for the corre- sponding Wattmeter deflection while pressing the PTT switch. ? Press and hold in the F button for 2 seconds to save the new settings and exit from the alignment mode. ALIGNMENT-8 Alignment TX Gain Adjustment ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT ja

38、ck. ? Connect the Audio Generator to pin 5 of the MIC jack (pin 7: GND), then set the output level to 1 mV 1 kHz. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ALC Meter Adjustment ? Connect the 50-Ohm Dummy Load and Wattme- ter to the

39、 ANT jack. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Rotate the DSP/SEL knob to select the align- ment parameter ALCM L. ? Press the PTT switch, then press the STO but- ton. ? Connect the Audio Generator to pin 5 of the MIC jack

40、(pin 7: GND), then set the output level to 4 mV 1 kHz. ? Rotate the DSP/SEL knob to select the align- ment parameter ALCM H. Press the PTT switch, then press the STO but- ton. ? Press and hold in the F button for 2 seconds to save the new setting and exit from the alignment mode. Reverse ALC Adjustm

41、ent ? Connect the 16.6-Ohm Dummy Load (parallel connections of the three 50-Ohm Dummy Loads) to the ANT jack. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Rotate the DSP/SEL knob to select the align- ment parameter 1-RALC. ? Press t

42、he PTT switch, then rotate the MAIN DIAL knob for 50 W on the PO meter of the FT-450. ? Release the PTT switch. ? Rotate the DSP/SEL knob to select the align- ment parameter 2-RALC. ? Press the PTT switch, then rotate the MAIN DIAL knob for 50 W on the PO meter of the FT-450. ? Release the PTT switc

43、h. ? Rotate the DSP/SEL knob to select the align- ment parameter 3-RALC. ? Press the PTT switch, then rotate the MAIN DIAL knob for 50 W on the PO meter of the FT-450. ? Release the PTT switch. ? Rotate the DSP/SEL knob to select the align- ment parameter 50RALC. ? Press the PTT switch, then rotate

44、the MAIN DIAL knob for 50 W on the PO meter of the FT-450. Release the PTT switch. Press and hold in the F button for 2 seconds to save the new settings and exit from the alignment mode. ? Press and hold in the F button for 2 seconds to save the new settings and exit from the alignment mode. AM Carr

45、ier Level Adjustment ? Connect the 50-Ohm Dummy Load and Wattme- ter to the ANT jack. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Set the MODE switch to AM. ? Rotate the DSP/SEL knob to select the align- ment parameter AM-CAR. ? Pr

46、ess the PTT switch, then rotate the MAIN DIAL knob for 25 W2 W on the Wattmeter. ? Release the PTT switch. ? Press and hold in the F button for 2 seconds to save the new setting and exit from the alignment mode. ALIGNMENT PARAMETER TXG1H TXG2H TXG3H TXG4H TXG5H TXG6H TXG7H TXG1L TXG2L TXG3L TXG4L TX

47、G5L TXG6L TXG7L WATTMETER 50 W 10 W 50 W 10 W 50 W 10 W 50 W 10 W 50 W 10 W 50 W 10 W 50 W 10 W 10 W 2 W 10 W 2 W 10 W 2 W 10 W 2 W 10 W 2 W 10 W 2 W 10 W 2 W ALIGNMENT-9 Alignment Voltmeter Adjustment ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the ali

48、gnment mode. ? Adjust the DC Power Supply voltage is exactly 13.8 V. ? Rotate the DSP/SEL knob to select the align- ment parameter VM-ADJ. ? Press the STO button. ? Press and hold in the F button for 2 seconds to save the new setting and exit from the alignment mode. ATAS Controller Adjustment ? Con

49、nect the Digital DC voltmeter (high-Z) to the ANT jack. ? Press and hold in the ATT/IPO, NB, and AGC buttons, while turning the radio on, to enter the alignment mode. ? Rotate the DSP/SEL knob to select the align- ment parameter ATAS DN. ? Press the STO button, then rotate the MAIN DIAL knob for 8.0 V on the DC Voltmeter. ? Rotate the DSP/SEL knob to select the align- ment parameter ATAS BK. ? Press the STO button, then rotate the MAIN DIAL knob for 9.5 V on the DC Voltmeter. ? Rotate the DSP/SEL knob to select the align- ment parameter ATAS UP. ? Press the STO button, confirm t