E.F. Johnson Company 988X SERIES Manuals

Manuals and User Guides for E.F. Johnson Company 988X SERIES. We have 1 E.F. Johnson Company 988X SERIES manual available for free PDF download: Service Manual

E.F. Johnson Company 988X SERIES Service Manual (127 pages)

9800 SERIES FM Two-Way Radio

Brand: E.F. Johnson Company | Category: Two-Way Radio | Size: 14 MB

Table of Contents
3
General Information

6
Scope of Manual

6
- General
  6
- LTR ® , Low Tier, and Data Models
  6
Transceiver Description

6
Part Number Breakdown

7
Transceiver Identification

8
Accessories

8
- Identification Number Breakdown
  8
Product Warranty

9
Factory Customer Service

9
Factory Returns

10
Replacement Parts

10
Internet Home Page

10
Installation

14
General

14
- Scope of Instructions
  14
- Performance Tests
  14
- Transceiver Programming
  15
- Required Power Source
  15
Mounting the Transceiver

15
Power Cable Installation

16
Accessory Cable Installation

17
- General
  17
- Accessory Pigtail Installation
  18
- Connecting Ignition Sense Wire
  18
- R170 Location Diagram
  18
- Accessory Cable Connector
  18
  - Connecting Horn Alert Wire
    19
  - Other Accessory Cable Outputs
    19
Remote Control Unit Installation

19
- General
  19
- Mounting Remote Control Unit
  19
Using an External Speaker

20
Data Cable Installation

20
- Data Cable Installation (-001 Cable Shown)
  20
  - General
    21
  - Data Cable Installation
    21
Key Cap Kits

21
- Multi-Net and LTR-Net Models
  21
- Data Cable Wire Chart
  21
  - Smartnet/Smartzone Models
    22
- Circuit Description
  
  23
General Transceiver Description

23
- Introduction
  23
- Circuit Protection (Fuses)
  23
- Synthesizer
  23
- Audio/Logic Board
  23
- Receiver
  24
- Transmitter
  24
Power Distribution and Switching

24
- Power Switching Control
  24
- Supply Switching
  24
- Power Distribution and Switching
  25
- Power On-Off Control Circuit
  25
Audio/Logic Board Digital Circuit

26
- Microcontroller (U101)
  26
- Memory and Latch Programming
  28
Receive Audio/Data Processing

29
- Amplifier (U301B)
  29
- Receive Audio Processing
  29
- Receive Data Processing
  30
- Squelch Circuit (U304A, U304B)
  31
Transmit Audio/Data Processing

31
Display Board

32
Synthesizer Circuit Description (Uhf Models)

33
Receiver Circuit Description (Uhf Models)

38
Transmitter Circuit Description (Uhf Models)

41
Synthesizer Circuit Description

44
Receiver Circuit Description

49
- (800/900 Mhz MODELS)
  49
- Front End Filter
  49
- RF Amplifier (Q201)
  49
- First Mixer (Q202), Crystal Filter (Z204)
  50
- Second Mixer/Detector (U201)
  50
Transmitter Circuit Description

51
Servicing

55
General

55
SURFACE MOUNTED DEVICES (Smds)

55
Synthesizer Troubleshooting

57
- Introduction
  57
- Reference Oscillator (U806)
  58
- VCO Module
  58
- Uhf Models
  58
- Synthesizer IC (U804)
  58
- Determining Synthesizer Counter Divide
  59
  - Numbers
    59
Receiver Servicing

59
Transmitter Servicing

59
Audio/Logic Board Servicing

59
- Digital Circuits
  59
- Analog Circuits
  59
- Parts List
  
  60
- Exploded Views
  
  90
  - Front Panel
    90
  - Front and Top
    91
  - Remote Control Unit
    92
  - Remote Transceiver
    92
Schematic Diagrams and Component Layouts

93
- Amplified Dynamic Microphone
  94
- Transceiver Top Photo
  95
- Transceiver Bottom Photo
  95
- Interconnect Schematic
  
  96
- Interface Board Layout
  
  96
  - Top View
    97
  - Bottom View
    97
  - Board Layout
    98
  - Schematic
    98
  - Programming Cable (P.N. 597-2002-200)
    98
- Display Board
  
  97
- Rpi (P.n. 023-9800-000)
  
  98
- Component Locator Guides
  
  99
  - UHF RF Board
    100
  - 800/900 Mhz RF Board
    103
  - Audio/Logic Board
    104
- 430-470 Mhz RF
  
  107
  - RF Board Schematic
    107
  - PA Board Schematic (25W)
    107
  - VCO Board Layout
    109
  - PA Board Layout (25W)
    109
  - PA Board Schematic (40W)
    110
  - PA Board Layout (40W)
    111
  - RF Board Schematic
    112
  - PA Board Schematic (25W)
    114
  - PA Board Layout (25W)
    116
  - VCO Board Layout
    116
  - PA Board Schematic (40W)
    117
  - PA Board Layout (40W)
    118
  - PA Board Schematic (15W)
    119
  - RF Board Schematic (800/900 Mhz)
    119
  - RF Board Layout (800 Mhz)
    120
  - RF Board Layout (900 Mhz)
    121
  - PA Board Layout (15W)
    122
  - VCO Board Layout
    122
  - PA Board Schematic (30W)
    123
  - PA Board Layout (30W)
    124
  - Schematic
    125
  - Board Layout
    126

E.F. Johnson Company Categories

Radio Portable Radio Two-Way Radio Repeater

Switch

More E.F. Johnson Company Manuals

E.F. Johnson Company 988X SERIES Manuals

E.F. Johnson Company 988X SERIES Service Manual (127 pages)

Table of Contents

General Information

Scope of Manual

Transceiver Description

Part Number Breakdown

Transceiver Identification

Accessories

Product Warranty

Factory Customer Service

Factory Returns

Replacement Parts

Internet Home Page

Installation

General

Mounting the Transceiver

Power Cable Installation

Accessory Cable Installation

Remote Control Unit Installation

Using an External Speaker

Data Cable Installation

Key Cap Kits

Circuit Description

General Transceiver Description

Power Distribution and Switching

Audio/Logic Board Digital Circuit

Receive Audio/Data Processing

Transmit Audio/Data Processing

Display Board

Synthesizer Circuit Description (Uhf Models)

Receiver Circuit Description (Uhf Models)

Transmitter Circuit Description (Uhf Models)

Synthesizer Circuit Description

Receiver Circuit Description

Transmitter Circuit Description

Servicing

General

SURFACE MOUNTED DEVICES (Smds)

Synthesizer Troubleshooting

Receiver Servicing

Transmitter Servicing

Audio/Logic Board Servicing

Parts List

Exploded Views

Schematic Diagrams and Component Layouts

Interconnect Schematic

Interface Board Layout

Display Board

Rpi (P.n. 023-9800-000)

Component Locator Guides

430-470 Mhz RF

Related Products

E.F. Johnson Company Categories