Samsung SRP-350PG Service Manual - Page 88
Samsung SRP-350PG - SRP 350 B/W Direct Thermal Printer Manual
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9-7 RS-232C Serial Communication Problem 9 Troubleshooting RS-232C Problem Communication Y Failure? N 1. Check the connection of the RS-232C Connector and Other side 2. Check the I/F Cable whether it is open or short 3. Check the Txd, Rxd Pin on CPU 4. Check the MAX232 Driving Chip and reated Circuit on I/F PBA 5. Check whether Signal is affected by the Cable Noise H/W Handshake Y N 1. Check the connection of the H/W handshaking Line and Other side(DTR/DSR) 2. Check the I/F Cable whether it is open or short 3. Confirm the H/W handshaking Protocol End Samsung Electro-Mechanics 9-7
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