IBM 6400 series Maintenance Manual page 134

Problem
Fails to print from host
–OR–
Prints incorrect characters
–OR–
Prints extra characters
–OR–
Drops characters
134
Table 4. Common Communications Problems
Interface
parallel
serial
twinax
coax
Common Causes
– Interface cable defective
– Host/Network configuration
– Printer logic
– Terminating Resistors
– Host/Printer interface cable
pinouts incompatible
– Host/Printer/Network
configuration
– Set DTR and RTS both True
– Interface cable defective
– Printer logic
– Interface cable defective
– Host–Printer definition
– Controller/Network configuration
– Printer logic
– Interface cable defective
– Controller/Network configuration
– Printer logic
Troubleshooting