Vertex VX-3R/E, Technical Supplement

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1
Specification ............................................................................................................................................. 2
Exploded View & Miscellaneous Parts .............................................................................................. 4
Block Diagram ......................................................................................................................................... 5
Circuit Description................................................................................................................................. 7
Alignment ................................................................................................................................................. 9
Board Unit (Schematics, Layouts & Parts)
MAIN Unit ....................................................................................................................................................................... 15
Filter Unit ......................................................................................................................................................................... 45
SW Unit ............................................................................................................................................................................. 49
VCO Unit .......................................................................................................................................................................... 57
©2010 VERTEX STANDARD CO., LTD.
EH028M90D
Technical Supplement
VX-3R/E
VHF/UHF
ULTRA-COMPACT DUAL-BAND TRANSCEIVER
WITH WIDE BAND COVERAGE
Introduction
This manual provides the technical information necessary for servicing the VX-3R/E
Ultra-Compact Dual-Band Transceiver.
Servicing this equipment requires expertise in handing surface-mount chip components.
Attempts by non-qualified persons to service this equipment may result in permanent
damage not covered by the warranty, and may be illegal in some countries.
Two PCB layout diagrams provided for each double-sided board in this transceiver.
Each side of the board is referred to by the type of the majority of components installed
on that side (“Side A” or “Side B”). 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 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 inconsistencies in the
technical information would be appreciated.
Contents
Important Note
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 appara-
tus. 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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