Vertex Standard VX-410 service manual UHF FM Transceiver, Contents

UHF FM Transceiver

VX-410/-420 series

Service Manual

©2004 VERTEX STANDARD CO., LTD. EC050U90A

VX-410 series

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 EUROPE B.V.

P.O. Box 75525, 1118 ZN Schiphol, The Netherlands

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

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-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 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.

Contents

Operating Manual Reprint	2	Board Unit (Schematics, Layouts & Parts)
Cloning	7	MAIN Unit	19
Specifications	8	DUMMY Unit	34
Exploded View & Miscellaneous Parts	9	Optional Units (Schematics, Layouts & Parts)
		FVP-25 Encryption / DTMF Pager Unit	35
Block Diagram	11
		VTP-50VX-Trunk Unit	37
Circuit Description	13
		DVS-5 Voice Storage Unit	39
Alignment	15