Vertex Standard EVX-531 Service Manual Page 1

EVX-531 VHF Service Manual 1IntroductionThis manual provides technical information necessary for servicing the EVX-531 VHF Hand-Held Digital/Analog T

EVX-531 VHF Service Manual 10IntroductionThe EVX-531 series has been aligned at the factory for the specied performance across the entire frequency r

EVX-531 VHF Service Manual 11The Alignment Tool OutlineInstallation the toolr Install the CE142 PC Programming Software to your PC.r Execute the “Al

EVX-531 VHF Service Manual 121. vCo (rx vCo/tx vCo) - This parameter is for conrmation only and cannot align -This parameter is to conrm whether t

EVX-531 VHF Service Manual 133. rx sensitivity (rx tune)This parameter is to align the RX BPF (Band Pass Filter) for Receive (RX) sensitivity. The PLL

EVX-531 VHF Service Manual 144. squelCh (sql)This parameter is to align the SQL (Squelch) Sensitivity. There are several alignment items as follows

EVX-531 VHF Service Manual 155. tx powerThis parameter is to align the “High Power”, “Low3 Power”, “Low2 Power”, or “Low1 Power” for the selected cha

EVX-531 VHF Service Manual 16AlignmentPerform the following alignments as needed.symbol deviationThis parameter is to align the deviation of the digit

EVX-531 VHF Service Manual 17modulation balanCe <wide> / <narrow> (this alignment is diFFiCult.) This parameter is to align the “Modulati

EVX-531 VHF Service Manual 18CtCss deviation <wide> / <narrow>This parameter is to align CTCSS Deviation of the selected channel.1. Press

EVX-531 VHF Service Manual 19dtmF deviationThis parameter is to align “DTMF Deviation”.1. Press the “DTMF” button to open the “DTMF Deviation Align-m

EVX-531 VHF Service Manual 2GeneralFrequency Range: 136-174 MHzChannel / Group: 32 Channel / 2 GroupEmission Type: 16K0F3E / 11K0F3E (Analog) 7K60

EVX-531 VHF Service Manual 20sequential tone deviationThis parameter is to ne-tune of the “Sequential Tone Deviation” for the 2-Tone and 5-Tone Encod

EVX-531 VHF Service Manual 21MAIN Unit (w/o Option Connector)Circuit Diagram (FR024510C: Interface & Power Supply Sections)

EVX-531 VHF Service Manual 22MAIN Unit (w/o Option Connector)Circuit Diagram (FR024510C: Control Section)

EVX-531 VHF Service Manual 23MAIN Unit (w/o Option Connector)Circuit Diagram (FR024510C: RF Section)

EVX-531 VHF Service Manual 24MAIN Unit (w/o Option Connector)Circuit Diagram (FR024510E: Interface & Power Supply Sections)

EVX-531 VHF Service Manual 25MAIN Unit (w/o Option Connector)Circuit Diagram (FR024510E: Control Section)

EVX-531 VHF Service Manual 26MAIN Unit (w/o Option Connector)Circuit Diagram (FR024510E: RF Section)

EVX-531 VHF Service Manual 27MAIN-3 Unit (w/ Option Connector)Circuit Diagram (FR025740A: Interface & Power Supply Sections)

EVX-531 VHF Service Manual 28MAIN-3 Unit (w/ Option Connector)Circuit Diagram (FR025740A: Control Section)

EVX-531 VHF Service Manual 29MAIN-3 Unit (w/ Option Connector)Circuit Diagram (FR025740A: RF Section)

EVX-531 VHF Service Manual 3GeneralFrequency Range: 136-174 MHzChannel / Group: 32 Channel / 2 GroupEmission Type: 16K0F3E / 14K0F3E / 11K0F3E (Ana

EVX-531 VHF Service Manual 21Copyright 2013Vertex Standard LMR, Inc.All rights reserved.No portion of this manualmay be reproduced withoutthe permissi

EVX-531 VHF Service Manual 4Exploded View & Miscellaneous Parts (w/o Option Connector)Disconnect the Speaker Connector from the MAIN Unit when

EVX-531 VHF Service Manual 5Exploded View & Miscellaneous Parts (w/ Option Connector)Disconnect the Speaker Connector from the MAIN Unit when r

EVX-531 VHF Service Manual 6Parts ListREF. DESCRIPTION VALUE MFR’s DESIG VXSTD P/N FRONTCASEASSY   CB6341000 FRONTCASESUBASSY   CB638800

EVX-531 VHF Service ManualBlock Diagram7

EVX-531 VHF Service Manual 81. Receiver System1-1. Front-end rF ampliFierIncoming RF signal from the antenna passes through the Low-pass lter,

EVX-531 VHF Service Manual 9Circuit Description3. PLL Frequency SynthesizerThe frequency synthesizer consists of VCO, TCXO (Xx501), and the custom IC