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CWR-685E
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 (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
Actions of Switches
8
Actions of External Control Signal Output Ports
9
Actions of CW Audio Demodulator
10
Change of CW Transmission Speed
11
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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