Vertex VX-8GR Technical Supplement

144/430 MHz
Dual-Band FM Transceiver
with GPS
VX-8GR
Technical Supplement
©2010 VERTEX STANDARD CO., LTD. Printed in Japan.
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. 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.
2) Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions.
Specification ........................................................................................................................................................................... 2
Exploded View & Miscellaneous Parts ............................................................................................................................. 4
Block Diagram ....................................................................................................................................................................... 5
Alignment ............................................................................................................................................................................... 7
Board Unit (Schematics, Layouts & Parts)
RF Unit Circuit Diagram ............................................................................................................................................... 19
RF Unit Parts Layout ..................................................................................................................................................... 20
RF Unit Parts List ........................................................................................................................................................... 21
CNTL Unit Circuit Diagram ......................................................................................................................................... 37
CNTL Unit Parts Layout ............................................................................................................................................... 38
CNTL Unit Parts List ..................................................................................................................................................... 39
CABLE Unit Circuit Diagram ....................................................................................................................................... 49
CABLE Unit Parts Layout ............................................................................................................................................. 49
CONNECT Unit Circuit Diagram ................................................................................................................................ 50
CONNECT Unit Parts Layout ...................................................................................................................................... 50
MAIN VCO Unit Circuit Diagram ............................................................................................................................... 51
MAIN VCO Unit Parts Layout ..................................................................................................................................... 51
MAIN VCO Unit Parts List ........................................................................................................................................... 53
SUB VCO Unit Circuit Diagram ................................................................................................................................... 55
SUB VCO Unit Parts Layout ........................................................................................................................................ 55
SUB VCO Unit Parts List .............................................................................................................................................. 57
VX-8GR Technical Supplement
EH041M90A
Introduction
This manual provides the technical information necessary for servicing the VX-8GR
144/430 MHz Dual-Band FM 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.
Important Note
Contents
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD
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
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