Atari XMM801, Field Service Manual, Page: 4 / 49

Figure 19. Parts Layout and Pattern Schematic ..... 11
4. ATARI SERIAL Input/Output Interface Board ......... 12
Figure 20. Circuit Board .......................... 12
Figure 21. Parts Layout Schematic ................. 12
5. Electric Circuit for Printer Mechanism ............ 13
Figure 22. Connection Diagram ..................... 13
D. TROUBLESHOOTING ..................................... 14
1. Check Flows for Troubleshooting ................... 15
Figure 23. Printer is totally out of work ......... 15
Figure 24. Incorrect function of printer mechanism 16
Figure 25. Print is available, but incorrect
characters ............................. 17
Figure 26. Feed motor is not working .............. 18
2. Check Points for Repair ........................... 19
3. Typical Wave Form of Signals ...................... 23
E. PARTS LIST .......................................... 26
F. SERVICES FOR PRINTER MECHANISM ...................... 37