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VZ-28 Instructions before use

Manual Scope:

This manual is provided to professionals who are

familiar with radio communications or radio communications

service with experienced technical staff to use. It contains a wireless radio repair VZ-28 major technical information and
data.

Precautions:

In the case of before don

t carefully verify all RF plugs or any open plugs don

t connect to the appropriate

terminals, please don't transmit radio.

In the vicinity of flammable and explosive gases, must turn off the radio's power, don

t operate this equipment.

This equipment should only be performed by experienced technical personnel.

Radio Overview

4

Summary of Contents for Mag One VZ Series

Page 1: ...ded or hip only In most cases one side has only chip components and the other has either a mixture ofboth chip and leaded components varister coils electrolytic capacitors ICs etc or leaded components...

Page 2: ...WARNING 11 13 CABLE CLOINE 11 14 PTT ID TRANSMIT MODE 11 15 THE SIDE KEY CAN BE PROGRAMMED THE FUNCTIONS AS FOLLOW 11 EXPLODED VIEW MISCELLANEOUS PARTS 12 VZ 28 SERIES SPARE PARTS 13 VZ 28 PARTS LIST...

Page 3: ...to 60 C Frequency Stability RF Input Output Impedance Dimension W x H x D Weight 2 5 ppm 50 ohm 127 x 60 x 38mm 255 g with battery Receive Sensitivity 12dB SINAD 0 20 V Adjacent Channel Selectivity I...

Page 4: ...to 60 C Frequency Stability RF Input Output Impedance Dimension W x H x D Weight 2 5 ppm 50 ohm 127 x 60 x 38mm 255 g with battery Receive Sensitivity 12dB SINAD 0 20 V Adjacent Channel Selectivity I...

Page 5: ...C to 60 C Frequency Stability RF Input Output Impedance Dimension W x H x D Weight 2 5 ppm 50 ohm 127 x 60 x 38mm 255 g with battery Receive Sensitivity 12dB SINAD 0 20 V Adjacent Channel Selectivity...

Page 6: ...ss radio repair VZ 28 major technical information and data Precautions In the case of before don t carefully verify all RF plugs or any open plugs don t connect to the appropriate terminals please don...

Page 7: ...Transmitting receiving signals 6 Speaker It is used to output voices 7 Microphone Input voices 8 PTT Press PTT button to put the radio in transmitting state release the button restore to receiving sta...

Page 8: ...read write the frequency of the radio via PC software 13 Battery Latch Fixed disassemble the battery pack 14 Battery Power supply for radio 6...

Page 9: ...plified enter to 1846 for processing then output the audio the audio signal is amplified by UTC2822 and output by the speaker at last TRANSMITTE The signal from the microphone passes through 1846 afte...

Page 10: ...to the processor Reset and backup circuit When turn on the power a positive pulse is output from the reset circuit consisting of D831 C831 and R831 to the third feed of reset terminal on U821 micropro...

Page 11: ...al oscillator signal used to switch the RF input to a continuous low medium frequency Synthesizer provides the base clock to adjust the VCO frequency 3 BASE CLOCK 1846 supports more base clocks for ex...

Page 12: ...mming software to adjust the squelch level 0 9 levels BEEP SETTING You can hear a beep sound when turn on the radio or press a key You can use programming software to open or close this function TIME...

Page 13: ...the data and Slave unit begin to receive data from Master unit 3 During cable cloneing Master unit blink red and Slave unit blink Green 4 When cloning completed Slave unit restart automatically 5 Swit...

Page 14: ...12...

Page 15: ...ssis 8 F001A28M052 Aluminum Chassis 9 F001A28E001 PCBA 400 470MHz 9 1 F001A28M009 Channel Potentiometer 9 2 F001A28M014 Volume Potentiometer 10 F001A28E005 PCBA 136 174MHz 11 F001A28E007 PCBA 350 390M...

Page 16: ...C0402 19 C314 C312 C174 C144 C904 C898 C239 C227 C221 C131 C101 C817 C812 C818 C913 C181 C147 C911 C356 104P C0402 37 C236 C834 C635 C632 C326 C325 C324 C905 C103 C568 C114 C233 C235 C271 C258 C128 C...

Page 17: ...562 10K R0402 21 R527 R528 R177 R184 R567 R297 R294 R292 R897 R239 R882 R884 R886 R898 R899 R187 R821 R857 R872 R874 R888 10R R0402 3 R121 R359 R357 15K R0402 1 R584 22K R0402 2 R221 R585 33K R0402 3...

Page 18: ...3 D262 D261 D266 HVC131 D ESC 2 D161 D160 HZU5 1B D USC 1 D180 KDS122 D USM MA742 1 D895 Triode RQA0009 T 2N1A 2SK3476 1 T141 DTC114EE T ESM DTA114EE 6 T851 T852 T102 T352 T171 T294 2SK1824 T ESM 2SK1...

Page 19: ...K C BC 47S 13 D 1 BA901 JP18 JP 18 2 1 JP865 CALL JT 02 1 SW882 MONI JT 02 1 SW881 PTT JT 02 1 SW883 ALARM S SKHLLBA010 1 SW889 MIRCO USB MIRCO USB2 1 JP751 RD810S S R087FENS 1 SW354 ST 1041 JK ST 106...

Page 20: ...C314 C312 C174 C144 C904 C898 C239 C273 C227 C221 C131 C817 C812 C818 C913 C181 C147 C911 C356 104P C0402 36 C236 C834 C635 C632 C326 C325 C324 C905 C103 C568 C567 C233 C235 C271 C258 C128 C101 C240...

Page 21: ...R177 R184 R567 R297 R294 R292 R897 R239 R882 R884 R886 R898 R899 R187 R821 R857 R872 R874 R888 10R R0402 3 R121 R359 R357 12K R0402 1 R553 15K R0402 1 R584 22K R0402 2 R221 R585 33K R0402 3 R112 R186...

Page 22: ...3 D262 D261 D266 HVC131 D ESC 2 D161 D160 HZU5 1B D USC 1 D180 KDS122 D USM MA742 1 D895 Triode RQA0009 T 2N1A 2SK3476 1 T141 DTC114EE T ESM DTA114EE 6 T851 T852 T102 T352 T294 T171 2SK1824 T ESM 2SK1...

Page 23: ...25 BATTERY JK C BC 47S 13 D 1 BA901 JP18 JP 18 2 1 JP865 CALL JT 02 1 SW882 MONI JT 02 1 SW881 PTT JT 02 1 SW883 ALARM S SKHLLBA010 1 SW889 MIRCO USB MIRCO USB2 1 JP751 ST 1041 JK ST 106 1 JK875 ST 30...

Page 24: ...17 C131 C221 C227 C273 C239 C898 104P C0402 36 C905 C324 C325 C326 C632 C635 C834 C236 C296 C357 C359 C842 C843 C844 C351 C148 C879 C813 C831 C895 C894 C893 C891 C581 C585 C584 C240 C101 C128 C258 C27...

Page 25: ...402 2 R355 R186 47K R0402 17 R864 R863 R182 R631 R633 R844 R351 R869 R868 R867 R866 R127 R141 R142 R227 R235 R101 47R R0402 2 R126 R143 100K R0402 6 R636 R834 R856 R128 R314 R293 100R R0402 7 R885 R88...

Page 26: ...T271 RD01MUS2 K6 T SOT89 2SK3078 1 T131 2SB624 T TSM 2SB624 2 T101 T291 HM3401 T TSM 2SB624 1 T351 2SC3356 T TSM 2SC3356 R25 1 T121 R3111Q271A T US4 1 U821 2SC4226 T TSM 2SC3356 R25 3 T266 T111 T315...

Page 27: ...ST 3013 06 JK ST 301 5 1 JK871 ANT 1 PX 333 ANT 1 ANT160 BATT J TEST POINT 1 J1 SW S ED08903O 1 SW861 RD810S S R087FENS 1 SW354 25...

Page 28: ...221 3V3 T111 2SC4226 T121 2SC3356 T131 2SK3078 T141 2SK4037 T271 3SK318 T267 DTA114YE T101 2SB624 T102 DTC114EE T181 DTA114YE T182 2SK1824 T171 DTC114EE BATT T555 2SK1824 3V3 3T 3T 3T 3V3 RDA_SCLK RDA...

Page 29: ...SDIO RDA_SEN RDA_PDN RDA_SQ APC VOX_DET RDA_SCLK RDA_CSS IN OUT RDA_SDIO RDA_SEN RDA_PDN RDA_SQ APC VOX_DET BATDET R_LED G_LED 3V3 3V3 BATT_i 3V3 MIC C831 104P R833 150K C834 104P R831 330K C833 220P...

Page 30: ...EN RDA_PDN RDA_SQ APC VOX_DET RDA_SCLK RDA_CSS IN OUT RDA_SDIO RDA_SEN RDA_PDN RDA_SQ APC VOX_DET BATDET R_LED G_LED 3V3 3V3 BATT_i 3V3 MIC C831 104P R833 150K C834 104P R831 330K C833 220P R834 100K...

Page 31: ...ONE RDA_SCLK RDA_SDIO RDA_SEN RDA_PDN RDA_SQ APC VOX_DET RDA_SCLK RDA_CSS IN OUT RDA_SDIO RDA_SEN RDA_PDN RDA_SQ APC VOX_DET BATDET R_LED G_LED 3V3 3V3 BATT_i 3V3 MIC C831 104P R833 150K C834 104P R83...

Page 32: ...VZ 28 D0 5 136 174MHz COMPONENTS VALUE 30...

Page 33: ...31...

Page 34: ...VZ 28 D0 5 136 174MHz BITMAP 32...

Page 35: ...33...

Page 36: ...VZ 28 G6 4 400 470MHz COMPONENTS VALUE 34...

Page 37: ...35...

Page 38: ...VZ 28 G6 4 400 470MHz BITMAP 36...

Page 39: ...37...

Page 40: ...VZ 28 F6 4 350 390MHz COMPONENTS VALUE 5 38...

Page 41: ...5 39...

Page 42: ...VZ 28 F6 4 350 390MHz BITMAP 5 40...

Page 43: ...5 41...

Page 44: ...VZ 28 PCB BOARD 42...

Page 45: ...43...

Page 46: ...44...

Page 47: ...45...

Page 48: ...VZ 28 GUIDELINE OF TROUBLESHOOTING 46...

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