Texas Instruments Extensa 660 Series Maintenance Manual page 93

1 8
Check BIOS Setup
Yes
Check the Data Bus
Yes
Check Busy Signal
Yes
Check U21(87338)
Entire Circuit
END
Figure 5-19 Printer Port Interface Troubleshooting Diagram
System Boots:
Printer Port Interface Checks
Enter Correct Type of
No
Printer
Check RP5, RP7
No
Check RP2 Pin6(BUSY)
No
Troubleshooting Procedures 5-33