TELEREADER CWR-685E Manuals

Manuals and User Guides for TELEREADER CWR-685E. We have 1 TELEREADER CWR-685E manual available for free PDF download: Service Manual

TELEREADER CWR-685E Service Manual

TELEREADER CWR-685E Service Manual (40 pages)

Brand: TELEREADER | Category: Media Converter | Size: 3 MB

Table of Contents

Table of Contents
2
1 Introduction (Concept and Cautions of Troubleshooting)

4
2 General Description

5
- Composition
  5
- Flow of Signal
  6
- Control of SW out REMOTE
  7
- Flow of Signal in Transmission
  7
3 Input/Output Actions

8
4 Troubleshooting

12
- Trouble of Built-In Display
  12
  - (A) no Display
    12
  - (B) Fluctuating Display
    14
  - (C) Abnormal External Display
    15
- Trouble of CRTC Block
  16
- Trouble of Computer Block
  19
- Trouble in CW Transmission
  20
- Trouble in CW Reception
  20
- Trouble RTTY
  21
5 Description of MODEM Printed Circuit Board Performance

21
- Demodulator
  21
- Modulator
  22
- Baud Rate Clock Unit
  22
- MODEM Printed Circuit Board Block Diagram
  24
6 Troubleshooting of MODEM Printed Circuit Board

25
- Demodulator
  25
- Modulator
  28
- Baud Rate Clock Unit
  29
7 Keyboard Troubleshooting (KB-685E, KB6850)

30
- Troubleshooting Flow Chart of Keyboard (PCB No. 820226-1)
  30
- List of Keyboard Output Codes
  32
8 Description of Former MODEM Board

33
9 Parts List

35

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