Hytera MD655 Manuals

Manuals and User Guides for Hytera MD655. We have 1 Hytera MD655 manual available for free PDF download: Service Manual

Hytera MD655 Service Manual

Hytera MD655 Service Manual (208 pages)

MD65 Series Digital Mobile Radio

Brand: Hytera | Category: Radio | Size: 11 MB

Table of Contents

Conventions
4
Notation Conventions
4
Table of Contents
6
1 Product Controls

8
- Front Panel
  8
- Rear Panel
  8
- Bottom View
  9
2 Disassembly and Assembly

10
- Assembling
  11
3 Exploded View and Packaging Guide

13
- Packaging Guide
  15
4 Specifications and Blind Spots

16
- Blind Spots
  19
5 Circuit Description

20
- Audio Output
  20
- Front Panel
  20
  - Keys
    20
  - Power Supply
    20
- Baseband Section
  21
  - Power Supply Module
    21
  - Control Module
    22
    
    Powering On/Off
    22
    
    Power On/Off Key
    22
    
    Ignition Signal
    22
    
    Emergency Alarm
    23
    
    Power-Up Process
    23
    
    Clock
    23
    
    Input Clock
    23
  - Interface Distribution
    24
    
    SPI Interface
    24
    
    MCSI Interface
    24
    
    MICROWIRE Interface
    24
    
    SSI Interface
    25
    
    USB Interface
    25
    
    UART Interface
    26
    
    Mobile Accessory Connector (MAC)
    26
    
    Option Board Interface
    26
  - Audio Module
    28
    
    RX Audio Path
    28
    
    TX Audio Path
    29
- RF Section
  29
  - Transmitter Circuit
    29
    
    Power Amplifier
    30
    
    TX Buffer Amplifier
    30
    
    Pre-Driver Power Amplifier
    30
    
    Driver Power Amplifier
    30
    
    Low-Pass Filter
    31
    
    Directional Coupler
    31
    
    Output Power Control
    31
    
    Temperature Protection
    31
  - Receiver Circuit
    32
    
    Receiver Front-End
    32
    
    Receiver Back-End
    33
  - Frequency Generation Unit (FGU)
    33
    
    PLL Synthesizer
    33
    
    Reference Crystal Oscillator
    33
    
    Vco
    34
- GPS Circuit
  35
6 Troubleshooting Flow Chart

36
- Control Circuit
  36
- GPS Circuit
  37
- Transmitter Circuit
  37
  - Description of Normal Situations
    38
  - No Receive
    40
- Receiver Circuit
  40
- Frequency Generation Unit (FGU)
  42
7 Interface Definition

44
- 10-Pin Aviation Interface
  44
- DB26 Accessory Interface
  44
- Other Interfaces
  46
- J1 (to Control Head Socket)
  46
8 Tuning Description

48
- Tools
  48
- Tuning Procedures
  48
  - Tuning the Radio
    48
  - Testing a Radio
    51
    
    Transmitting
    51
    
    Receiving
    51
    
    Front Panel PCB View
    53
    
    Top Layer
    53
    
    Bottom Layer
    54
    
    Main Board PCB View
    55
10 Block Diagram

57
- Power Supply Module
  57
- RF Module
  58
- Baseband Module
  58
11 Schematic Diagram

59
- Memory
  60
- Omap_Core
  61
- Omap_Si_Peripheral
  62
- Power
  63
- Power CTRL
  64
- Codec
  65
- Codec_Out
  66
- Peripheral2
  67
- Peripheral1
  68
- Rx-Back-End
  69
- Tx-Ctrl
  71
- Tx-Pa-Lineup
  72
- Fgu-Pll/Dac
  73
- Fgu-Vco
  74
- Gps
  75
12 Parts List

76
- Main Board
  76
- Front Panel
  104
- GPS Circuit
  105
- Product Controls
  109
- Disassembly and Assembly
  111
- Assembling
  112
- Exploded View and Packaging Guide
  114
- Packaging Guide
  116
- Specifications and Blind Spots
  117
- Blind Spots
  120
- Circuit Description
  121
- Front Panel
  121
- Baseband Section
  122
- Power Supply Module
  122
- Control Module
  123
- Interface Distribution
  125
- Audio Module
  129
- RF Section
  130
- Transmitter Circuit
  130
- Receiver Circuit
  133
- Frequency Generation Unit (FGU)
  134
- GPS Circuit
  136
- Troubleshooting Flow Chart
  137
- Control Circuit
  137
- GPS Circuit
  138
- Transmitter Circuit
  138
- Receiver Circuit
  141
- Frequency Generation Unit (FGU)
  143
- Interface Definition
  145
- 10-Pin Aviation Interface
  145
- DB26 Accessory Interface
  145
- Other Interfaces
  147
- Tuning Description
  149
- Tools
  149
- Tuning Procedures
  149
- Tuning the Radio
  149
- Testing a Radio
  152
- PCB View
  154
- Block Diagram
  158
- Power Supply Module
  158
- RF Module
  159
- Baseband Module
  159
- Schematic Diagram
  160
- Parts List
  177
- Main Board
  177
- Front Panel
  204
- GPS Circuit
  205

Advertisement

Advertisement

Related Products

Hytera Categories

Portable Radio Radio Repeater Two-Way Radio Touch terminals

More Hytera Manuals