Vertex Standard VX-350 Service Manual

VHF FM Transceiver
VX-350
Service Manual
© 2007 VERTEX STANDARD CO., LTD.
Introduction
This manual provides technical information necessary for servicing the VX-350 FM Transceiver.
Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qualified persons to ser-
vice this equipment may result in permanent damage not 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 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 inconsistencies in the
technical information would be appreciated.
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.
Specifications...........................................................2
Exploded View & Miscellaneous Parts .................3
Block Diagram ........................................................ 5
Circuit Description ................................................7
EC065N90A
Important Note
Contents
Alignment ............................................................... 9
MAIN Unit Circuit Diagram .............................. 15
MAIN Unit Parts Layout .................................... 17
MAIN Unit Parts List .......................................... 19
VERTEX STANDARD CO., LTD.
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