Vertex Standard VX-5500L, Service Manual

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1
Introduction
This manual provides technical information necessary for servicing the VX-5500L 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.
©2010 VERTEX STANDARD CO., LTD. EC034L90D
Service Manual
VX-5500L
VHF Low-Band FM Transceiver
Operating Manual Reprint......................... 1-1
Cloning .................................................................. 2-1
Specifications................................................ 2-2
Exploded View & Miscellaneous Parts ... 3-1
Block Diagram .............................................. 3-2
Interconnection Diagram ........................... 3-4
Circuit Description ..................................... 4-1
Alignment...................................................... 5-1
Contents
Board Unit
(Schematics, Layouts & Parts)
MAIN Unit ........................................................... 6A-1
DISPLAY Unit ...................................................... 6B-1
KEY Unit ............................................................... 6C-1
VR Unit ................................................................. 6D-1
MIC CONN Unit (Lot. 1~10) .............................. 6E-1
MIC CONN 2 Unit (Lot. 11~) ............................. 6E-2
NB Unit ................................................................. 6F-1
Optional Board Unit
(Schematics, Layouts & Parts)
F2D-8 2-Tone Decode Unit ................................ 7A-1
F5D-14 5-Tone Unit ............................................. 7B-1
FVP-25 Encryption / DTMF Pager Unit ........... 7C-1
VTP-50 VX-Trunk Unit ...................................... 7D-1
FIF-7A Connection Unit ..................................... 7E-1
FVP-36 Encryption Unit ..................................... 7F-1
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
Important Note
After Lot. 8 of 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.