This manual provides the technical information necessary forservicing the VX-1400 HF Transceiver.
Servicing this equipment requires expertise in handing sur-face-mount chip components. Attempts by non-qualified per-sons to service this equipment may result in permanent dam-age not covered by the warranty, and may be illegal in somecountries.
Two PCB layout diagrams are provided for each double-sidedboard in this transceiver. Each side of the board is referred toby the type of the majority of components installed on that side (“Side A” or “Side B”). In most cases one sidehas only chip components (surface-mount devices), and the other has either a mixture of both chip and leadedcomponents (trimmers, coils, electrolytic capacitors, ICs, etc.), or leaded components only.
As described in the pages to follow, the advanced microprocessor design of the VX-1400 Transceiver allows acomplete alignment of this transceiver to be performed without opening the case of the radio; all adjustmentscan be performed from the front panel, using the “Alignment Mode” menu.
While we believe the information in this manual to be correct, VERTEX STANDARD assumes no liability fordamage that may occur as a result of typographical or other errors that may be present. Your cooperation inpointing out any inconsistencies in the technical information would be appreciated.
ImportantNote
1)This transceiver was assembled using Pb (lead) free solder, based on the RoHS specification.Only lead-free solder (Alloy Composition: Sn-3.0Ag-0.5Cu) should be used for repairs performed on this apparatus. Thesolder stated above utilizes the alloy composition required for compliance with the lead-free specification, and any solderwith the above alloy composition may be used.
2) Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions.
MAIN Unit..................................................................................................................................................23
PA Unit........................................................................................................................................................47
Synthesizer Steps:10 HzAntenna Impedance:50 Ohm, UnbalancedOperating Temperature Range:-20° C to +60° CFrequency Stability:±0.5 ppmPower Requirements:DC 13.8V±15 %Current Consumption:Receive (No Signal) 1A, Transmit (Max) 23AIP Rating:IP54 Front Panel (Only with MH-77 connected)Case Size (W x H x D):178 x 60 x 268 mm (7" x 2.4" x 10.6") w/o knobs and fansWeight (approx.):3.4 kg (7.5 lbs)
Receiver
Circuit Type:Double Conversion SuperheterodyneSensitivity (10 dB S/N):J2B/J3E/A1A
IF Rejection:80 dB (1.8 - 30 MHz)Image Rejection:80 dB (1.8 - 30 MHz)Audio Output:10 W into 4 Ohm @ 5% THD (J3E/A1A)
Transmitter
Power Output (@13.8 V, 25° C):100 W (J2B/J3E/A1A),
Low/Mid/High, 3 steps selectable the setting power is adjustable by1 W step (100 W - 10W)25 W AM Carrier (A3E/H3E) (25 W - 2.5W)
Modulation Type:PSN Type Modulator (SSB),
Low-Level (Early Stage) (AM)
Spurious Radiation (Harmonics):-42 dB (1.8 - 30 MHz)
-36 dB (1.6 - 1.8 MHz,)
J3E Carrier Suppression:-45 dB @ 100 W (PEP)Undesired Sideband Suppression:50 dB @ 1.5 kHz tone, 100 W (PEP)SSB Audio Response:< -6 dB (300 to 2400 Hz)Occupied Bandwidth:< 0.5 kHz (A1A)
The following procedures cover adjustments that are notnormally required once the transceiver has left the facto-ry. However, if a problem occurs during normal opera-tion due to component failure; realignment may be re-quired after the faulty components have been replaced.
We recommend that authorized Vertex Standard Techni-cians, who are experienced with the circuitry and fullyequipped to repair and align our products, perform re-pairs. If a fault is suspected, contact the selling dealer forinstructions regarding repair. Authorized Vertex StandardTechnicians have the latest information to align all cir-cuits and make complete performance checks to ensurecompliance with factory specifications after repairs.
Those who undertake the following alignments are cau-tioned to proceed at their own risk. Problems caused byunauthorized attempts at realignment are not covered bythe warranty policy.
Vertex Standard must reserve the right to change circuitsand alignment procedures in the interest of improvedperformance, without notifying owners.
Under no circumstances should any alignment be at-tempted unless the normal functions and operation of thetransceiver are clearly understood, the cause of the mal-function has been clearly identified and all faulty compo-nents replaced. The need for realignment should be de-termined to be necessary.
The following test equipment (and a thorough familiari-ty with its correct use) is necessary for correct alignment.Most steps do not require all of the equipment listed. Theinteractions of some adjustments may require that sever-al adjustments be performed in a sequence. Do not at-tempt to perform only a single step unless it is clearlyisolated electrically from all other steps. Have all testequipment ready before beginning, and follow all of thesteps in a section in the order they are presented.
RequiredTestEquipment
RF Signal GeneratorAF Signal GeneratorSpectrumAnalyzer good to at least 1 GHz.Frequency CounterRF MillivoltmeterDigital DC Voltmeter (high-Z, 1 M-Ohm/V)DC VoltmeterDC Ammeter (20 A)Ohmmeter50-Ohm Dummy Load (150 watts)150-Ohm Dummy Load (150 watts)In-Line Wattmeter (100 watts, 50-Ohm)RF Sampling Coupler4-OhmAF Dummy Load (15 watts)
IBM® PC / compatible Computer with Windows
Vista/XP/2000
Vertex Standard VPL-1 or FIF-10 + CT-104A Pro-
gramming Cable & CE111 Programming Soft-ware
AlignmentPreparation&Precautions
A 50-ohm RF Dummy load and in-line wattmeter mustbe connected to the "ANT" jack in all procedures that callfor transmission, except where specified otherwise. Cor-rect alignment is not possible with an antenna.
After completing one step, read the following step to de-termine whether the same test equipment will be required.If not, remove the unneeded test equipment before pro-ceeding (except the dummy load and wattmeter).
Correct alignment requires that the ambient temperaturebe maintained constant between 68 °F ~ 86 °F (20 °C ~ 30°C). When the transceiver is brought into the shop from ahot or cold environment, it should be allowed time to cometo room temperature before alignment. Also, the testequipment must be thoroughly warmed up before begin-ning.
®
Whenever possible, alignments should be made with os-cillator shields and circuit boards firmly affixed in place.
Note:Signal levels in dB referred to in this procedure
are based on 0 dBµ = 0.5 µV (closed circuit).
Caution:Do not connect the audio output line to ground,
and be certain that the speaker has adequate ca-pability to handle the audio output from theradio.
7VX-1400 Series Service Manual
Alignment
Preparation
Please back up the data of VX-1400 (following refer-
ence).
1."Upload" function in the "Radio" menu of CE111.
2.Click on the [ON] button.
➠
3."Save As" function in the "File"menu of CE111.
4."Save" function in the "File" menuof CE111.
Please select "VX-1400
Alignment.c111" clicking "File"-"Open".
Please select "Radio"-"Download" and return it to
former data when the adjustment ends.
50-ohm
DummyLoad
Inline
Wattmeter
Frequency
Counter
RFSampling
Coupler
ANT
VPL-1orFIF-10+CT-104AProgrammingCable
COMPort
CE111ProgrammingSoftware
Install the CE111 (Clone Editor) to your PC.Set the "VOL" of VX-1400 to the position of "12-
o'clock".
Connect the VX-1400 to a computer with a Clone cable.
RF
SignalGenerator
Transceiver
MIC
INPUT
PowerSupply
13.8VDC
PLLReferenceFrequencyAlignment
Press and hold in the [P1], [P2], [P0] and [P3] keys,
while turning the radio on, to enter the alignmentmode.
Connect the Frequency Counter to TP4044 on the
MAIN Unit.
Press the [] / [] key for 22.625 MHz ±1Hz on the
Frequency Counter.
Press and hold in the [MENU] button for 2 seconds to
save the new settings and exit from the alignmentmode.
2ndLocalCarrierOutputLevel
Connect the RF millivoltmeter to TP4039 on the MAIN
Unit.
Adjust T4017 on the MAIN Unit for maximum de-
flection on the RF millivoltmeter (more than 40mVrms).
PLLVCVVoltage
Connect the Digital DC voltmeter (high-Z) to TP4058
on the MAIN Unit.
Referring to the table below, adjust the listed compo-
nents for the required voltage, or confirm that the cor-rect voltage is present on each frequency listed (It doesagain).
CH
010
011
012
013
VCO
VCO1
VCO1
VCO2
VCO2
Adjustment
5.2±0.1V
> 0.6V
5.2±0.1V
> 0.6V
TXIFCircuit(SSB/CW)
Connect the 50-Ohm Dummy Load and Wattmeter to
the "ANT" jack.
Disconnect the TMP plug from J4002 on the RF-IF-
Unit, and then connect the RF millivoltmeter and 50Ohm dummy load to J4002.
Inject the 1 mV, 1 kHz audio signal to MIC Terminal
of MIC jack.
Press the [⊳]/[], [] / [] button to select the
"memory channel 015".
Press the PTT button; adjust T4015, T4012, T4013,
T4014, and T4011 on the MAIN-Unit for maximumdeflection on the RF millivoltmeter (Please adjust itagain).
Disconnect the RF millivoltmeter and 50 Ohm dummy
load from J4002 on the MAIN-Unit, then re-connectthe TMP plug to J4002.
RXIFCircuit(SSB/CW)
Connect the AF millivoltmeter and 4 Ohm dummy
load to the EXT SPKR jack.
Connect the RF Signal Generator to the "ANT" jack,
8VX-1400 Series Service Manual
and then set the output level to 0 dBµV at the 19.9MHz.
Press the [] / [] button to select the "memory chan-
nel 017".
Adjust T4016 on the MAIN-Unit for maximum deflec-
tion on the AF millivoltmeter.
Alignment
CL_DATACL_SW+5VGNDMICPTTGNDHOOK
MICJACKPINOUT
TP4058
T4011
T4017T4015T4014T4013T4012
TP4039
T4018L4072
MAINUNITALIGNMENTPOINTS
J4002
9VX-1400 Series Service Manual
Alignment
PAUnit
Preparation
Connect the 50-Ohm Dummy Load and Wattmeter to
the "ANT" jack.
Disconnect the jumper plug from J5007 and J5005 on
the PA Unit.
Set VR5001, VR5002, VR5003, VR5004 and VR5005 on
the PA Unit to fully counter clockwise position.
Press the [] / [] button to select the "memory chan-
nel 019".
Pre-Drive Stage Idling Current
Disconnect the jumper plug from J5007 and J5005 on
the PA Unit, and then connect the DC ammeter toJ5005.
Press the PTT button; adjust VR5001 on the PA Unit
so the DC ammeter reading is 150 mA ± 10 mA.
Release the PTT button.
Drive Stage Idling Current
Disconnect the jumper plug from J5007 on the PA Unit,
and then connect the DC ammeter to J5007.
Press the PTT button; adjust VR5002 on the PA Unit
so that the DC ammeter reading is 0.5 A ± 50 mA.
Release the PTT button.Press the PTT button; adjust VR5003 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 VR5004 on the PA Unit
so the DC ammeter reading is 1.0 A ± 100 mA.
Release the PTT button.Press the PTT button; adjust VR5005 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 J5005 and J5007, and
then solder the lead of L5008 (It cuts power switch).
CM Coupler Balance
Connect the DC voltmeter between TP5028 (+ lead)
on the PA Unit and Chassis (- lead).
Press the [] / [] button to select the "memory chan-
nel 021".
Press the PTT switch; adjust TC5001 on the PA Unit
for minimum deflection on the DC voltmeter.
Release the PTT switch.
10VX-1400 Series Service Manual
Alignment
VR5004
VR5002
VR5001
J5005
J5007
VR5005
VR5003
L5008
PAUNITALIGNMENTPOINTS
TP5028
TC5001
11VX-1400 Series Service Manual
Alignment
SoftwareAdjustment
ALC Adjustment
Connect the 50-Ohm Dummy Load and Wattmeter to
the "ANT" jack.
Press and hold in the [P1], [P2], [P0] and [P3] keys,
while turning the radio on, to enter the alignmentmode.
Press the [S2/2182] knob to select the alignment pa-
rameter "I-ALC".
Confirm that the alignment value is "80".Press and hold in the [MENU] button for 2 seconds to
save the new setting and exit from the alignmentmode.
Power Adjustment
Connect the 50-Ohm Dummy Load and Wattmeter to
the "ANT" jack.
Press and hold in the [P1], [P2], [P0] and [P3] keys,
while turning the radio on, to enter the alignmentmode.
Referring to the Table below, press the [S2/2182]
key (or [S1/ALARM] key) to recall each parame-ter listed, then key the transmitter and press the[] / [] key for the required output.
PARAMETER
1PO-H
1PO-MH
1PO-ML
1PO-L
2PO-H
2PO-MH
2PO-ML
2PO-L
3PO-H
3PO-MH
3PO-ML
3PO-L
4PO-H
4PO-MH
4PO-ML
4PO-L
OUTPUTPOWER
100W(±5W)
50W(±2W)
25W(±2W)
10W(±1W)
100W(±5W)
50W(±2W)
25W(±2W)
10W(±1W)
100W(±5W)
50W(±2W)
25W(±2W)
10W(±1W)
100W(±5W)
50W(±2W)
25W(±2W)
10W(±1W)
PARAMETER
5PO-H
5PO-MH
5PO-ML
5PO-L
6PO-H
6PO-MH
6PO-ML
6PO-L
7PO-H
7PO-MH
7PO-ML
7PO-L
OUTPUTPOWER
100W(±5W)
50W(±2W)
25W(±2W)
10W(±1W)
100W(±5W)
50W(±2W)
25W(±2W)
10W(±1W)
100W(±5W)
50W(±2W)
25W(±2W)
10W(±1W)
TX Gain Adjustment
Connect the 50-Ohm Dummy Load and Wattmeter to
the "ANT" jack.
Connect the Audio Generator to MIC Terminal of the
MIC jack (GND Terminal), then set the output level to
1.5 mV @1 kHz.
Press and hold in the [P1], [P2], [P0] and [P3] keys,
while turning the radio on, to enter the alignmentmode.
Referring to the Table below, press the [S2/2182]
key (or [S1/ALARM] key) to recall each parame-ter listed, then key the transmitter (connect PTTTerminal of the MIC jack to GND) and press the[] / [] key for the required output.
PARAMETER
1TX-G-H
2TX-G-H
3TX-G-H
4TX-G-H
5TX-G-H
6TX-G-H
7TX-G-H
Press and hold in the [MENU] button for 2 seconds to
save the new settings and exit from the alignmentmode.
OUTPUTPOWER
50W(±10W)
50W(±10W)
50W(±10W)
50W(±10W)
50W(±10W)
50W(±10W)
50W(±10W)
PARAMETER
1TX-G-L
2TX-G-L
3TX-G-L
4TX-G-L
5TX-G-L
6TX-G-L
7TX-G-L
OUTPUTPOWER
5W(±2W)
5W(±2W)
5W(±2W)
5W(±2W)
5W(±2W)
5W(±2W)
5W(±2W)
AM Carrier Level Adjustment
Connect the 50-Ohm Dummy Load and Wattmeter to
the "ANT" jack.
Press and hold in the [P1], [P2], [P0] and [P3] keys,
while turning the radio on, to enter the alignmentmode.
Press the [S2/2182] key (or [S1/ALARM] key)to
select the alignment parameter "AMCAR".
Press the PTT switch without the microphone audio
input, then press the [] / [] key for 25 W±2 W onthe Wattmeter.
Release the PTT switch.Press and hold in the [MENU] button for 2 seconds to
save the new setting and exit from the alignmentmode.
Press and hold in the [MENU] button for 2 seconds to
save the new settings and exit from the alignmentmode.
CL_DATACL_SW+5VGNDMICPTTGNDHOOK
MICJACKPINOUT
12VX-1400 Series Service Manual
Reverse ALC Adjustment
Connect the 150-Ohm Dummy Load to the "ANT" jack.Press and hold in the [P1], [P2], [P0] and [P3] keys,
while turning the radio on, to enter the alignmentmode.
Press the [S2/2182] key (or [S1/ALARM] key) to se-
lect the alignment parameter "1R-ALC".
Press the PTT switch, then press the [] / [] key for
50 W on the PO meter of the VX-1400.
Release the PTT switch.RPress the [S2/2182] key (or [S1/ALARM] key) to se-
lect the alignment parameter "2R-ALC".
Press the PTT switch, then press the [] / [] key for
50 W on the PO meter of the VX-1400.
Release the PTT switch.Press the [S2/2182] key (or [S1/ALARM] key) to se-
lect the alignment parameter "3R-ALC".
Press the PTT switch, then press the [] / [] key for
50 W on the PO meter of the VX-1400.
Release the PTT switch.Press and hold in the [MENU] button for 2 seconds to
save the new settings and exit from the alignmentmode.