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Brother DP-525CJ Service Manual Page 113

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Troubleshooting
3) Connect the connector for echo-back test and press RETURN. The echo-back test is
executed in the following order:
1
Tests the following :
CTS = LOW and CD = LOW if RTS = LOW
CTS = HIGH and CD = HIGH if RTS = HIGH
2
Tests the following:
DSR = LOW if DTR = LOW
DSR = HIGH if DTR = HIGH
3
Tests that the data* sent to TXD can be received at RXD correctly.
* As the test data, 00(H), FF(H), 55(H), and AA(H) are sent.
4) If the result of test is normal, the following message is printed.
RS-232C TEST OK
(3) Functions
1) If an error is detected during execution of the test, processing ends and the
corresponding error code is printed.
RS-232C TEST ERROR XX
X X : Error code
1
Upper digit = A
An error has occurred in the RTS
terminal is open.
The lower digit expresses the status by bits.
Bit 0 = 0: CTS = HIGH when RTS = LOW
Bit 0 =
Bit 1 = 0: CTS = HIGH when RTS = HIGH
Bit 0 =
Bit 2 = 0: CD = HIGH when RTS = LOW
Bit 0 =
Bit 3 = 0: CD = HIGH when RTS = HIGH
Bit 0 =
Lower digit ..... State of the error in each step.
Upper digit ..... The step where the error occurred.
1: CTS = LOW when RTS = LOW (error)
1: CTS = LOW when RTS = HIGH (error)
1: CD = LOW when RTS = LOW (error)
1: CD = LOW when RTS = HIGH (error)
CTS, RTS
3-50
REPAIR
SERVICE MANUAL
CD test executed while the

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Troubleshooting

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  • brian aaron Jan 27, 2017 03:48:
    1-26-2017
    ​I have a brother dp 540cj and it has a built in diskette drive.
    I have a ibm thinkpad latop. I connected a Memorex external usb floppy drive to the ibm thinkpad laptop. i'm copying 3 files from the ibm thinkpap (notepad) to the square 1.44 mb diskette. no problem, the 3 files were copied to the diskette.
    ​I turn on the brother dp 540cj, select file manager, insert the square diskette. the brother dp 540cj open only the file names on the disk. I try to open word text on either of the 3 files on the disk and the brother dp 540cj don't open the word text in any of the 3 files. I have been trying for several days to open the word text on the files using the brother dp 540cj and don't have any further instructio​ns for this problem. I tried saving the file names to all coding - Unicode, ansi utf-8 and can't fix the electronic problem.
    m​y email address is snowwash@j​uno.com