Epson TM-L90 Technical Reference - Page 100

5.7 FAQ List The questions shown in the list below begin with "Q" and their replies with "A" 1. Look through sentences beginning with "Q" to find information relating to your question or problem. 2. Then follow the instructions described in the "A" sentence below it. Q: Print data dropout occurs. A: Check the handshake process. Data dropout can occur when the handshake between the host computer and the printer is not performed correctly. This can result in errors related to print buffer capacity. Confirmation procedure Use the following steps to check the handshake process. 1. Select a comparatively large volume of data for printing and send it to the printer. 2. Enable the on-line state by opening the printer cover while the printer is printing. 3. Check the data send operation. • If data send terminates: Handshake process is normal • If data send continues: Handshake process is abnormal 4. In cases where the handshake process is found to be abnormal, follow the steps listed in Corrective Procedure shown below and re-enter host unit and printer settings so that they match. Corrective procedure 1. Confirm the serial communication cable. Confirm the specification of cable connection. "Connecting the Cable" on page 65. 2. Confirm serial communication condition. Confirm serial communication condition of printer and host. Serial communication conditions • Baud rate • Parity • Flow control • Data length Confirmation and setting of printer are as follows. 1. Confirm serial communication condition of the printer by self-test (See page 44). 100 Application Development Information