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DP-525CJ
Service manual
Rs-232C I/F Circuit; Fig. 2.8 Rs-232C I/F Circuit - Brother DP-525CJ Service Manual
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Owner's manual
(132 pages)
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Parts reference list
(39 pages)
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Contents
Table of Contents
Troubleshooting
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THEORY
Electrical
5.10.
RS-232C I/F Circuit
The RS-232C I/F circuit is shown in Fig. 2.8. The driver IC (#1) converts the signal level
(+5V – 0V) on the main PCB to the RS-232C signal level in the external line and vice
versa.
Fig. 2.8 RS-232C I/F Circuit
2-10
SERVICE MANUAL
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Table of Contents
Troubleshooting
PART II REPAIR
64
Troubleshooting Flow Charts
67
Fig. 3.2 Troubleshooting Flowchart (continued)
68
troubleshooting tables
70
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