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EVX-531 UHF Service Manual

1

UHF Digital/Analog Transceiver

EVX-531

Service Manual

Vertex Standard LMR, Inc.

©

2013 Vertex Standard LMR, Inc.

EC113U90F

Introduction

This manual provides technical information necessary for servicing the  

EVX-531

 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.

Important Note

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 apparatus. The solder 

stated above utilizes the alloy composition required for compliance 

with the lead-free specification, and any solder with the above al-

loy composition may be used.

CAUTION

Risk of explosion if battery is replaced by an incorrect type.

Dispose of used batteries according to the instructions.

Contents

Specifications

  USA/EXP Models ......................................................................................................................................... 2

  EU Model ...................................................................................................................................................... 3

Exploded View & Miscellaneous Parts

  w/o Option Connector ................................................................................................................................... 4

  w/ Option Connector ..................................................................................................................................... 5

Parts List ............................................................................................................................................................ 6

Block Diagram ................................................................................................................................................... 8

Circuit  Description ........................................................................................................................................... 9

Alignment..........................................................................................................................................................11

MAIN Uuit Circuit Diagram (Type “G6”, w/o Option Connector) ........................................................... 22

MAIN-2 Uuit Circuit Diagram (Type “G7”, w/o Option Connector) ........................................................ 25

MAIN-3 Uuit Circuit Diagram (Type “G6” & “G7”, w/ Option Connector) ............................................ 28

Summary of Contents for EVX-531

Page 1: ...ormation 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 Important Note This transceiver is assembled using Pb lead free solder based on the RoHS specification Only lead free solder Alloy...

Page 2: ...oz 315 g w FNB V134LI UNI Antenna Belt Clip Receiver Measured by TIA603 603D Circuit Type Double Conversion Super heterodyne IF 50 85 MHz 101 7 MHz Sensitivity 0 25 µV Analog 12 dB SINAD 0 28 µV Digital 1 BER Conducted Spurious 57 dBm Adjacent Channel Selectivity 70 dB 25 kHz Step TIA603 60 dB 12 5 kHz Step TIA603 70 dB 25 kHz Step TIA603D 45 dB 12 5 kHz Step TIA603D Intermodulation 65 dB 25 kHz S...

Page 3: ...I Antenna Belt Clip Receiver Measured by ETS 300 086 Circuit Type Double Conversion Super heterodyne IF 50 85 MHz 101 7 MHz Sensitivity 0 4 µV Analog 20 dB SINAD 0 28 µV Digital 1 BER Conducted Spurious 57 dBm 1 GHz 47 dBm 1 GHz Adjacent Channel Selectivity 70 dB 25 kHz Step 60 dB 12 5 kHz Step Intermodulation 65 dB Spurious Image Rejection 70 dB Hum and Noise 45 dB 25 kHz Step 40 dB 12 5 kHz Step...

Page 4: ...SSY Component KNOB VOL KNOB FREQ WASHER BUSH 2 pcs CAP MIC SP SPEAKER WIRE ASSY SPEAKER HOLDER 2 pcs RUBBER PACKING SP O RING CAP O RING 0 8x2 2 2 pcs BINDING HEAD SCREW M2 6X6B 2 pcs FRONT CASE ASSY Component FRONT CASE MODEL LABEL NAME PLATE ESCUTCHEON 16CH DOUBLE FACE TAPE ECS PLATE FREQ RUBBER TOP SEL SUPPORT TOP SEL LIGHT GUIDE SP NET RUBBER PTT FRAME PTT SHEET PTT RUBBER SIDE LATCH NAIL LATC...

Page 5: ...157 SPEAKER 36N D2114B T9207535A WIRE ASSY RA125110A KNOB FREQ RA125100A KNOB VOL RA125090A x 2 psc BUSH CB6388000 FRONT CASE SUB ASSY RA1448500 RUBBER PACKING CHASSIS RA090590A x 2 psc NUT C065 RA1458000 RUBBER BOOTS RA1483000 SHIELD COVER FET RA037690B SHEET 6x6 CB6614000 CHASSIS ASSY Li Ion BATTERY PACK FNB V133LI UNI AAJ67X001 or FNB V134LI UNI AAJ68X001 k l m RA1483100 SHEET HEAT8X8t1 k l RA1...

Page 6: ...EMI ABSORBER RA1364100 PAN HEAD SCREW 2 pcs M2X2 5 3KA U07225001 BIND HEAD TAPTITE B 2 pcs 2X10 U24110001 MAIN UNIT CB6389000 TYPE G7 F 1001 CHIP FUSE 3 15A 36V FHC16 322ADTP Q0000118 MC1001 MIC ELEMENT PF0 1055P M3290045 Q 1513 FET RQA0011DNS G3070392 S 1001 TACT SWITCH EVQPUB02K N5090167 S 1002 TACT SWITCH EVQP8403M N5090173 S 1003 TACT SWITCH EVQPUB02K N5090167 S 1004 TACT SWITCH EVQPUB02K N509...

Page 7: ...53SDF 50 85MHZ H1102479 SHIELD COVER FET RA1483000 SHEET HEAT8X8t1 RA1483100 NUT 2 psc C065 RA090590A PAN HEAD TAPTITE B 9 pcs M2X5 U44105001 MAIN 3 UNIT CB6611000 TYPE G6 CB6609000 TYPE G7 F 3001 CHIP FUSE 3 15A 36V FHC16 322ADTP Q0000118 F 3301 CHIP FUSE 1 15A 36V FCC16 132ABTP Q0000109 MC3001 MIC ELEMENT PF0 1055P M3290045 Q 3513 FET RQA0011DNS G3070392 S 3001 TACT SWITCH EVQPUB02K N5090167 S 3...

Page 8: ...EVX 531 UHF Service Manual Block Diagram 8 ...

Page 9: ...e output signal from the custom IC Qx017 CPCAP is applied to the audio speaker 2 Transmitter System 2 1 MIC Amplifier Modulator The speech signal from internal microphone MCx001 or ex ternal microphone Jx003 is supplied to the custom IC Qx017 CPCAP which is amplified the speech signal The amplified speech signal from the custom IC Qx017 CPCAP is supplied to another custom IC Qx306 OMAP which proce...

Page 10: ...23 3SK293 through the buffer amplifier Qx524 2SC5005 in case of the reception In the transmission the output is modulated to the FM or digi tal in the custom IC Qx522 RODINIA and then supplied to the transmitter section described previously 3 2 VCV Varactor Control Voltage Control The tuning voltage VCV of the VCO establishes the lock range of VCO by controlling the cathode of varactor diode Dx502...

Page 11: ...pment listed the inter actions of some adjustments may require that more complex adjustments be performed afterwards Do not attempt to per form only a single step unless it is clearly isolated electrically from all other steps Have all test equipment ready before beginning and follow all of the steps in a section in the order presented Alignment Required Test Equipment r Radio Tester with calibrat...

Page 12: ...he detail information is written in the help document of CE142 PC Programming Software 1 VCO confirmation only 2 PLL Reference Frequency Frequency 3 RX Sensitivity RX Tune 4 Squelch SQL RSSI 5 TX Power High Low3 Low2 Low1 6 Maximum Deviation Wide Narrow Adjust the following items when needed Symbol Deviation Modulation Balance CTCSS Deviation Wide Narrow DCS Deviation Wide Narrow DTMF Deviation MS...

Page 13: ...CO status Alignment 2 PLL Reference Frequency Frequency This parameter is to align the reference frequency for PLL 1 Click the Frequency button to open the Frequency Align ment window 2 Click the PTT button or press the SPACE bar of the com puter s keyboard the radio will start to transmit on the center frequency channel 3 Set the value to get the desired frequency according to the fol lowing ways...

Page 14: ...ment to get the best RX sensitivity Highest RSSI value 5 Click the OK button to finish the RX Sensitivity alignment and save the data 1 You may adjust the RX sensitivity manually by the following method l Dragging the slide bar l Clicking the arrow buttons l Pressing the left right arrow key of the computer s keyboard l Entering the value 800 FFF in the Current Data box from the computer s keyboar...

Page 15: ...vel at Wide 5k 4k or Nar row 2 5k The procedure for all the alignments is as follows 1 Click the Start button you wish to align to open the SQL RSSI Alignment window 2 Click the Start button on the desired alignment item to open other window 3 Set the RF Signal Generator according to the indication of the window then click the Start button 4 The automatic alignment will start to get the optimum le...

Page 16: ...elected chan nel All Freq Alignment value changes on all channels Alignment 6 Maximum Deviation Wide Narrow This parameter is to align the Maximum Deviation Wide Narrow 1 Press the Max Dev W N button to open the Max Deviation Alignment window 2 Click the PTT button on the desired channel The radio starts to transmit on the selected channel 3 Set the value to get desired deviation Wide 4 2 kHz Narr...

Page 17: ...ragging the slide bar l Clicking the arrow buttons l Pressing the up down key of the computer s keyboard l Entering the value in the entry box from the computer s keyboard 4 After getting the desired deviation click the PTT button or press the SPACE bar to stop transmitting 5 Click the OK button to finish the Symbol Deviation align ment and save the data You may select the alignment type from the ...

Page 18: ...ation level that wrote down according to the following ways l Dragging the slide bar l Clicking the arrow buttons l Pressing the left right arrow key of the computer s keyboard l Entering the value 0 3FF in the Current Data box from the computer s keyboard 6 Click the PTT button or press the SPACE bar to stop trans mitting 7 Click the OK button to finish the Modulation Balance align ment and save ...

Page 19: ... tone frequency default 67 0 Hz by changing the value of the CTCSS Freq box located at the bottom of the screen if needed DCS Deviation Wide Narrow This parameter is to align DCS Deviation of the selected channel 1 Press the CTCSS Dev W N button to open the DCS De viation Alignment window 2 Click the PTT button or press the SPACE bar of the com puter s keyboard to transmit the radio 3 Set the valu...

Page 20: ...align the deviation level by any DTMF tone default A available selection 0 9 A D E and F by changing the value of the DTMF Code box located at the bottom of the screen if needed MSK Deviation This parameter is to align MSK Deviation which use for the ANI operation of the MDC1200 System 1 Press the MSK button to open the MSK Deviation Align ment window 2 Click the PTT button or press the SPACE bar ...

Page 21: ...one Deviation for the 2 Tone and 5 Tone Encoder 1 Press the Seq Tone button to open the Sequential Tone De viation Alignment window 2 Entering the desired value in the New box from the comput er s keyboard 3 Click the OK button to finish the Sequential Tone Deviation alignment and save the data Alignment ê ...

Page 22: ...EVX 531 UHF Service Manual 22 MAIN Unit Type G7 w o Option Connector Circuit Diagram FR024460D Interface Power Supply Sections ...

Page 23: ...EVX 531 UHF Service Manual 23 MAIN Unit Type G7 w o Option Connector Circuit Diagram FR024460D Control Sections ...

Page 24: ...EVX 531 UHF Service Manual 24 MAIN Unit Type G7 w o Option Connector Circuit Diagram FR024460D RF Sections ...

Page 25: ...EVX 531 UHF Service Manual 25 MAIN 2 Unit Type G6 w o Option Connector Circuit Diagram FR025510A Interface Power Supply Sections ...

Page 26: ...EVX 531 UHF Service Manual 26 MAIN 2 Unit Type G6 w o Option Connector Circuit Diagram FR025510A Control Sections ...

Page 27: ...EVX 531 UHF Service Manual 27 MAIN 2 Unit Type G6 w o Option Connector Circuit Diagram FR025510A RF Sections ...

Page 28: ...EVX 531 UHF Service Manual 28 MAIN 3 Unit Type G6 G7 w o Option Connector Circuit Diagram FR025720A Interface Power Supply Sections ...

Page 29: ...EVX 531 UHF Service Manual 29 MAIN 3 Unit Type G6 G7 w o Option Connector Circuit Diagram FR025720A Control Sections ...

Page 30: ...EVX 531 UHF Service Manual 30 MAIN 3 Unit Type G6 G7 w o Option Connector Circuit Diagram FR025720A RF Sections ...

Page 31: ...EVX 531 UHF Service Manual 22 Copyright 2013 Vertex Standard LMR Inc All rights reserved No portion of this manual may be reproduced without the permission of Vertex Standard LMR Inc ...

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