Vertex Standard EVX-534 Service Manual

UHF Digital/Analog Transceiver
EVX-534/-539
( Full Dot Matrix LCD Version )
Service Manual
Introduction
This manual provides technical information necessary for servicing the
EVX-534/-539 UHF Hand-Held Digital/Analog Transceiver.
Servicing this equipment requires expertise in handling surface-mount
chip components. Attempts by non-qualified persons to service this equip-
ment 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 ma-
jority 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 in-
formation would be appreciated.
This transceiver is 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 appa-
ratus. The solder stated above utilizes the alloy composition required for compliance with the lead-free specifica-
tion, and any solder with the above alloy composition may be used.
Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions.
Specifications
USA (NA) & Except EIA (CE) Models ...2
EIA (CE) Model .......................................3
Exploded View & Miscellaneous Parts
EVX-534 ..................................................4
EVX-539 ..................................................5
EVX-534/-539 UHF Service Manual
Important Note
CAUTION
Contents
Parts List ......................................................6
Block Diagram .............................................7
Circuit Description .....................................8
Alignment...................................................10
MAIN Uuit Circuit Diagram ....................21
DISPLAY Uuit Circuit Diagram ..............24
Vertex Standard LMR, Inc.
© 2015 Vertex Standard LMR, Inc.
EC129U90D
A D
B C
?
EVX-534
1 A
2 3
ABC DEF
4 B
5 6
GHI
JKL MNO
7 PQ C CXL
8 9 WX
RS
TUV YZ
DEL D OK
0 #
EVX-539
1