Vertex Standard VX-410 Series, Service Manual

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©2010 VERTEX STANDARD CO., LTD.
EC050N90F (USA)
Service Manual
VX-410/-420 series
VHF FM Transceiver
VX-410 series VX-420 series
Introduction
This manual provides technical information necessary
for servicing the VX-410/-420 series FM Transceiver.
Servicing this equipment requires expertise in handling
surface-mount chip components. Attempts by non-quali-
fied persons to service this equipment may result in per-
manent damage not covered by the warranty, and may be
illegal in some countries.
Two PCB layout diagrams are provided for each dou-
ble-sided circuit board in the transceiver. Each side of is
referred to by the type of the majority of components in-
stalled on that side (“leaded” or “chip-only”). In most cases
one side has only chip components, and the other has ei-
ther a mixture of both chip and leaded components (trim-
mers, coils, electrolytic capacitors, ICs, etc.), or leaded
components only.
While we believe the technical information in this man-
ual to be correct, VERTEX STANDARD assumes no lia-
bility for damage that may occur as a result of typograph-
ical or other errors that may be present. Your cooperation
in pointing out any inconsistencies in the technical infor-
mation would be appreciated.
Operating Manual Reprint ...................................2
Cloning .....................................................................7
Specifications ..........................................................8
Exploded View & Miscellaneous Parts ..............9
Block Diagram .......................................................11
Circuit Description ...............................................13
Alignment ..............................................................15
Contents
Board Unit (Schematics, Layouts & Parts)
MAIN Unit ............................................................... 19
DUMMY Unit .......................................................... 56
Optional Units (Schematics, Layouts & Parts)
FVP-25 Encryption / DTMF Pager Unit .............. 57
VTP-50 VX-Trunk Unit .......................................... 59
DVS-5 Voice Storage Unit ..................................... 61
Important Note
After Lot.36 of 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.
The solder stated above utilizes the alloy composition required for compliance with the lead-free specification, and
any solder with the above alloy composition may be used.
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