IBM 4247-003 Maintenance Manual - Page 145

Table 18. Error Messages for Models 001, 002, and 003 (continued) Message Description 220 SERIAL DSR ERROR MODEL 003 TWINAX CODE SEE USER'S GUIDE A remote connection serial interface error condition was detected. The Data Set Ready or Data Carrier Detect signal was not sensed. 221 SERIAL OVERFLOW ERROR MODEL 003 TWINAX CODE SEE USER'S GUIDE A serial input buffer overflow error condition was detected. Data has been lost. A89, A8C, or A97 JUMPER AND KEYS Application errors. Manufacturing use only. Action See "MAP 0120: Parallel or Serial Attachment, Model A00 and Model 003" on page 33. 1. Press stop to clear the message. 2. Increase the buffer size and/or: 3. Check the SERIAL PACING PROTOCOL value set in the printer configuration against the hosts pacing protocol. 4. Restart the print job. Press Stop, then Start. 1. Remove the jumper from the bottom of the operator panel. 2. Install a new operator panel. See "Operator Panel" on page 355. 3. Install a new operator panel cable. 4. Install a new logic board. See "Logic Board - Models 001 and 002" on page 378. Or "Logic Board - Model 003" on page 366. Chapter 1. Diagnosing Problems 145