9
-8
9
Troubleshooting
9
-8 RS-485 Serial Communication Problem
1. Check the connection of the RS-485 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 MAX488 Driving Chip and reated Circuit
on I/F PBA
5. Check whether Signal is affected by the Cable Noise
1. Check the connection of the H/W
handshaking Line and Other side(DR1,2/CS1,2)
2. Check the I/F Cable whether it is open or short
3. Confirm the H/W handshaking Protocol
4. Check the Voltage Level of each Line
H/W
Handshake
Communication
Failure?
N
Y
N
Y
RS-485 Problem
End
Samsung Electro-M
e
chanics
Summary of Contents for SRP-350U
Page 2: ...About Notes Precaution symbols Samsung Electro Mechanics ...
Page 4: ...Overview of this Receipt Printer Samsung Electro Mechanics ...
Page 7: ...1 Precaution Statements 8 6 0 A 6 8 9 8 4 8 8 1 3 Samsung Electro Mechanics ...
Page 8: ...1 Precaution Statements 1 4 MEMO Samsung Electro Mechanics ...
Page 26: ...2 Product Specifications 2 18 MEMO Samsung Electro Mechanics ...
Page 34: ...3 Installation and Operation 3 8 MEMO Samsung Electro Mechanics ...
Page 63: ...7 Special Circuit Descriptions 7 12 MEMO Samsung Electro Mechanics ...
Page 113: ...12 Block Diagram 12 2 MEMO Samsung Electro Mechanics ...
Page 115: ...13 Wiring Diagram 13 2 MEMO Samsung Electro Mechanics ...
Page 125: ... SAMSUNG ELECTRO MECHANICS Co Ltd January 2004 Printed in Korea ELECTRO MECHANICS ...