Samsung OFFICESERV 7100 Service Manual page 109

3.3.1.4 Abnormal SIO Operation
The procedure for resolving the problem caused by system UART port operation of cabinet
when MP10/11 board is used is as follows:
Start
Is signal generated from
E4(UART_TX) PIN of
MP10/11 CPU?
Yes
Is TXD of U20(MAX3232)
generated?
Yes
Check the connection up to RJ-45.
© SAMSUNG Electronics Co., Ltd.
- Check MMC.
- Check the S/W version.
No
- Check if other functions operate
properly.
- Replace CPU(U1).
No
Replace U20.
OfficeServ 7100 Service Manual
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