Difference between revisions of "Dragon 32 - Service Information (RWEW/KA/0081a)"
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Latest revision as of 11:36, 8 April 2016
SERVICE INFORMATION
JOYSTICK FAULTS
Using a known good joystick, check operation with diagnostic cartridge. Ensure both joysticks are used.
1. Change IC20.
2. Change IC25.
3. Check R1, R57, R58, R59, R60, R61, R62.
CARTRIDGE FAULTS
1. Check for blockage of cartridge port.
2. Check cartridge guides in correct sides and secure.
3. Check address lines from port to IC15, IC19 and IC26/35.
4. Change IC 15.
PRINTER FAULTS
1. Check connection lead correctly wired and that printer has automatic line feed.
2. Check keyboard operation.
3. Change IC24.
FAULTS DURING PROGRAM OPERATION
1. Check program is valid - test with other program.
2. Change IC15.
3. Change IC17.
4. Change IC18.
5. Change IC19.
6. Check RAM lines.
RWEW/KA/0081a
18.4.83
