Motorola VZ Series Service Manual
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VZ Series
Service Manual
Introduction
This manual provides technical information necessary for servicing the VZ series Transceiver.
Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qualified
per-sons to service this equipment may result in permanent damage not covered by the warranty, and may be illegal
in some countries.
One 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 (varister, coils,
electrolytic capacitors, ICs, etc.), or leaded components only.
While we believe the technical information in this manual to be correct,
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.
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.
VZ-30 Service Manual
Motorola Solutions,Inc.
©2017
Motorola Solutions
Important Note
Motorola Solutions,Inc.
C Z S M 0 0 0 5 0
0
assumes no liability

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Summary of Contents for Motorola VZ Series

  • Page 1 C Z S M 0 0 0 5 0 Introduction This manual provides technical information necessary for servicing the VZ series Transceiver. Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qualified per-sons to service this equipment may result in permanent damage not covered by the warranty, and may be illegal in some countries.
  • Page 2: Table Of Contents

      Contents    SPECIFICATIONS .............................. 2   INSTRUCTIONS BEFORE USE  .......................... 3   VZ‐30 CIRCUIT DESCRIPTION  .......................... 5     ..............................  5   HIP  ESCRIPTION  ..................................  5   ECEIVER 1)   Front‐end RF amplifier ..........................  5   2)   RF signal demodulation ..........................  5   3)   Baseband signal processing  .........................  5   4)  ...
  • Page 3: Specifications

    Specifications UHF version VZ-30-G6-4 General 400 -470 MHZ Frequency Range: Number of Channels: 7.4 V DC Power Supply Voltage: 12.5/25 kHz Channel Spacing: Battery Life (5-5-90 duty cycle with 15 hours (with battery saver) / 9 hours (without battery saver) 1800mAh battery): –20 °C to +60 °C Operating Temperature Range:...
  • Page 4: Instructions Before Use

    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-30 major technical information and data. Precautions ...
  • Page 5 3.) SK2 (Side Key 2) (programmable)  You may request your dealer to program the key as variety functions. 4.) LED Indicator  In the high-power state, glowing red in transmit mode and glowing green in receive mode.  In the low-power state, glowing orange in transmit mode and glowing green in receive mode. Antenna ...
  • Page 6: Circuit Description

    VZ-30 Circuit Description 1.Chip Description VZ-30 circuit utilizes RDA1846 (RF part) and SCT3252F (baseband) double-chip solution. This model utilizes RDA1846 chip, which is a highly integrated chip with powerful features, The chip integrates VCO, PLL, LNA, MIX, LDO, voice processing functions and so on. VZ-30-G6-4 only applies RDA1846 signal modulation and demodulation part and RF front-end transmitter and receiver functions.
  • Page 7: Voice Reported Frequency

    RF signals enter RDA1846 (U601) through the filter and low noise amplification, RDA1846 (U601) according to the internal strength and the RSSI of the noise to the signal with a preset reference signal is compared to the condition judgment valid when the conditions set by default, it is determined receive valid, RDA1846 (U601) of SQ high level output to MCU (U101);...
  • Page 8: Power Supply

    overheating by opening Q406, to reduce the input voltage of the APC circuit, the reduction the output power of the small amplifer to protect final amplifier to avoid overheating. Power supply The battery voltage changes into 3.6V by DC-DC, and then changes into 3.3V (A3V3) by LDO (U703) to RF and baseband analog power supply;...
  • Page 9: Exploded View & Miscellaneous Parts

    Exploded View & Miscellaneous Parts VZ-30 Service Manual...
  • Page 10: Series Spare Parts

    VZ-30 Series Spare parts Part No. Part name 210101586 Housing 310401007 Crab Eye Nut 211001049 Channel Selector Knob 211001048 ON/OFF/Volume Knob 211101082 Rear Cover Screws 211101083 Washer for the backover piastic 211101084 220401025 Seal Contact 220501022 Seal Chassis 310101031 Aluminum Chassis 410601002 PCBA(UHF) Channel Potentiometer...
  • Page 11: Block Diagram

    VZ-30 Block Diagram VZ-30 Service Manual...
  • Page 12 VZ-30 Service Manual...
  • Page 13: Vz-30-G6-4 (Uhf)Schematic Diagram

    VZ-30-G6-4 (UHF)SCHEMATIC DIAGRAM VZ-30 Service Manual...
  • Page 14 VZ-30 Service Manual...
  • Page 15 VZ-30 Service Manual...
  • Page 16 VZ-30 Service Manual...
  • Page 17 VZ-30 Service Manual...
  • Page 18: Vz-30-D0-5 (Vhf) Schematic Diagram

    VZ-30-D0-5 (VHF) SCHEMATIC DIAGRAM VZ-30 Service Manual...
  • Page 19 VZ-30 Service Manual...
  • Page 20 VZ-30 Service Manual...
  • Page 21 VZ-30 Service Manual...
  • Page 22 VZ-30 Service Manual...
  • Page 23: Components Reference

    VZ-30 -Components Reference VZ-30 Service Manual...
  • Page 24 VZ-30 Service Manual...
  • Page 25: Vz-30-G6-4(Uhf)- Components Value

    VZ-30-G6-4(UHF)- Components Value VZ-30 Service Manual...
  • Page 26 VZ-30 Service Manual...
  • Page 27: Vz-30-D0-5 (Vhf)- Components Value

    VZ-30-D0-5 (VHF)- Components Value VZ-30 Service Manual...
  • Page 28 VZ-30 Service Manual...
  • Page 29: Vz-30-Pcb Board

    VZ-30-PCB Board VZ-30 Service Manual...
  • Page 30 VZ-30 Service Manual...
  • Page 31: Common Troubleshooting Table

    VZ-30 common troubleshooting table: Malfunction Malfunction Processing steps Approach Walkie 1. Low battery or 1.Detects battery voltage is normal 1.Charge the battery or replace the cannot battery damage battery power on 2.Power circuit 1.Check the battery contacts for 1.Clean / repair / replace J701 (No sound, fault corrosion...
  • Page 32 U601 and U101 normal 2. TX DC switch 1.When transmit, check Q404-2 1.Check open or short fault 0V ? 2.Replace Q404 2. Q404-3 3.3V 3.APC fault 1.When transmit ,check U401-8= 1.Check Q406 & Q409,replace Q406 & battery voltage Q409 2. Check Q408-2 3.3V 2.Check Q408 3.

This manual is also suitable for:

Vz-30-g6-4Vz-30-g6-4 uhfVz-30-d0-5 vhfVz-30Vz-30-pcb

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