Vertex Standard VX-800, Service Manual

1

©2005 VERTEX STANDARD CO., LTD.

UHF Band

Service Manual

VX-800

Introduction

The Vertex Standard VX-800 is a compact, hand-held
portable transceiver for the UHF land mobile bands
that offers the convenience of small size, light
weight, and simple operation. The VX-800 can be
programmed by your Vertex Standard Dealer with
up to 200 channels for both single and split fre-
quency operation. The VX-800 provides up to 5 watts
of RF output power and includes a flexible quick-
connect antenna.

The transceiver and Ni-Cd, Li-Ion battery packs are
constructed of thick high impact polycarbonate plas-
tic, with special attention paid by the designers to
tight sealing and ruggedness, assuring years of reli-
able operation even in harsh environments.

The following pages describe the operation, features
and accessories of the VX-800. Following the dis-
cussion of transceiver operation, details regarding
programming software, alignment, and mainte-
nance will follow.

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

Contents

Operating Manual Reprint ................................................................................................................................................ 2
Set (Menu) Mode Functions .............................................................................................................................................. 8
Specification ....................................................................................................................................................................... 11
Exploded Views & Miscellaneous Parts ....................................................................................................................... 12
Block Diagram .................................................................................................................................................................... 13
Circuit Description ............................................................................................................................................................ 15
Alignment ........................................................................................................................................................................... 18
Board Units (Schematics, Layouts & Parts)

MAIN Unit ...................................................................................................................................................................... 25
VR Unit ............................................................................................................................................................................ 55
SW Unit ............................................................................................................................................................................ 56
Dummy Unit ................................................................................................................................................................... 57

Optional Board Units (Schematics, Layouts & Parts)

F2D-8 2-Tone Decode Unit ............................................................................................................................................ 58
VTP-50 VX-Trunk Unit .................................................................................................................................................. 60
FVP-25 Encryption / DTMF Pager Unit ...................................................................................................................... 62
F5D-14 5-Tone Unit ........................................................................................................................................................ 64