|
|
PDF VX-537 Data sheet ( Hoja de datos )
| Número de pieza | VX-537 | |
| Descripción | UHF Band Service Manual | |
| Fabricantes | VERTEX STANDARD | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de VX-537 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
VX-537
UHF Band
Service Manual
©2010 VERTEX STANDARD CO., LTD.
EC052U90D
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARDhttp://www.DataSheet4U.net/
US Headquarters
10900 Walker Street, Cypress, CA 90630, U.S.A.
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong
VERTEX STANDARD (AUSTRALIA) PTY., LTD.
Normanby Business Park, Unit 14/45 Normanby Road
Notting Hill 3168, Victoria, Australia
Introduction
This manual provides technical information necessary for ser-
vicing the VX-537 UHF FM Transceiver.
Servicing this equipment requires expertise in handling surface-
mount chip components. Attempts by non-qualified persons to
service this equipment may result in permanent damage not cov-
ered 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 referred to by the
type of the majority of components installed on that side
(“leaded“ or “chip-only“). In most cases one side has only chip
components, and the other has either a mixture of both chip and
leaded components (trimmers, coils, electrolytic capacitors, ICs,
etc.), or leaded components only.
While we believe the technical information in this manual to be
correct, VERTEX STANDARD assumes no liability for damage
that may occur as a result of typographical or other errors that
may be present. Your cooperation in pointing out any inconsis-
tencies in the technical information would be appreciated.
datash
Contents
Specification ..................................................................................................................................................................... A-1
Exploded Views & Miscellaneous Parts ..................................................................................................................... B-1
Block Diagram .................................................................................................................................................................. C-1
Circuit Description .......................................................................................................................................................... D-1
Alignment ......................................................................................................................................................................... E-1
Board Units (Schematics, Layouts & Parts)
RF Unit ............................................................................................................................................................................ F-1
CNTL Unit ..................................................................................................................................................................... G-1
SW Unit .......................................................................................................................................................................... H-1
Dummy Unit ................................................................................................................................................................... I-1
VR Unit ............................................................................................................................................................................ J-1
Interface Unit ................................................................................................................................................................ K-1
KEY Unit ........................................................................................................................................................................ L-1
Optional Board Units (Schematics, Layouts & Parts)
F2D-8 2-Tone Decode Unit ......................................................................................................................................... M-1
VTP-50 VX-Trunk Unit ................................................................................................................................................ N-1
FVP-25 Encryption / DTMF Pager Unit .................................................................................................................... O-1
F5D-14 5-Tone Unit ...................................................................................................................................................... P-1
1 page  
Block Diagram
C-1
5 Page 
Alignment
Introduction
Required Test Equipment
The
is carefully aligned at the factory for the speci-
Ì RF Signal Generator with calibrated output level at
fied performance across the frequency range specified for
600 MHz
each version. Realignment should therefore not be neces-
Ì Deviation Meter (linear detector)
sary except in the event of a component failure, or when
Ì In-line Wattmeter with 5% accuracy at 600 MHz
altering the version type. All component replacement and
Ì 50-Ohm RF Dummy Load with power rating 10W at
service should be performed only by an authorized
600 MHz
representative, or the warranty policy
Ì 16-Ohm AF Dummy Load
may be voided.
(Attention : Audio output is BTL output;
The following procedures cover the sometimes critical and
tedious adjustments that are not normally required once
the transceiver has left the factory. However, if damage
occurs and some parts subsequently are placed, realign-
ment may be required. If a sudden problem occurs dur-
ing normal operation, it is likely due to component fail-
ure; realignment should not be done until after the faulty
component has been replaced.
do not short “shield“ to ground!)
Ì Regulated DC Power Supply
(standard 7.5V DC, 3A)
Ì Frequency Counter with 0.2 ppm accuracy at 600 MHz
Ì AC Voltmeter
Ì DC Voltmeter
Ì UHF Sampling Coupler
Ì IBM PC / compatible Computer with Microsoft DOS
v3.0 or later operating system
We recommend that servicing be performed only by au-
Ì Vertex Standard Microphone Cable (T9206933),
thorized
service technicians who
Connection Cable, and SVC65 Alignment program
are experienced with the circuitry and fully equipped for
repair and alignment. Those who do undertake any of the
Alignment Preparation and Precautions
following alignments are cautioned to proceed at their
A 50-Ohm RF Dummy Load and in-line wattmeter must
own risk. Problems caused by unauthorized attempts at
be connected to the main antenna jack in all procedures
realignment are not covered by the warranty policy. Also,
that call for transmission, except where specified other-
reserves the right to change circuits
wise. Correct alignment is not possible with an antenna.
and alignment procedures, in the interest of improved per- http://www.DataSheet4U.net/ After completing one step, read the following step to de-
formance, without notifying owners.
termine whether the same test equipment will be required.
Under no circumstances should any alignment be at-
If not, remove the test equipment (except dummy load
tempted unless the normal function and operation of the
and wattmeter, in connected) before proceeding.
transceiver are clearly understood, the cause of the mal-
function has been clearly pinpointed and any faulty com-
ponents replaced, and realignment determined to be ab-
solutely necessary.
Correct alignment requires that the ambient temperature
be the same as that of the transceiver and test equipment,
and that this temperature be held constant between 20 °C
and 30 °C (68 °F ~ 86 °F). When the transceiver is brought
Do not attempt to perform only a single step unless it is
into the shop from hot or cold air, it should be allowed
clearly isolated electrically from all other steps. Have all
time to come to room temperature before alignment.
test equipment ready before beginning, and follow all of
the steps in a section in the order presented.
Whenever possible, alignments should be made with os-
cillator shields and circuit boards firmly affixed in place.
The following test equipment (and thorough familiarity
Also, the test equipment must be thoroughly warmed up
with its correct use) is necessary for complete realignment.
before beginning.
Correction of problems caused by misalignment result-
ing from use of improper test equipment is not covered
under the warranty policy. While most steps do not re-
Note: Signal levels in dB referred to in the alignment proce-
dure are based on 0 dBµ EMF = 0.5 µV.
quire all of the equipment listed, the interactions of some
adjustments may require that more complex adjustments
be performed afterwards.
E-1
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet VX-537.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| VX-53-1A3 | Snap Action Switch |  Omron Electronics |
| VX-53-1C23 | Snap Action Switch | Omron Electronics |
| VX-537 | UHF Band Service Manual | VERTEX STANDARD |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |