• Picture blurred
• White dot patterns on screen, usually appear as vertical dotted
lines.
If any of the preceeding conditions are observedr refer to paragraph
5.4, Troubleshooting.
5.3.4 Keyboard Test
This test verifies the proper operation of the system Keyboard. To
conduct this test, the preceeding tests, Memo Pad Test and Shock
Test, should have been successfully run and the system should be
displaying the Memo Pad Logo.
The following steps constitute the Keyboard Test:
1. Type each of the character keys and observe their correct display
on the television screen.
2. Press the RETURN and BREAK keys observing the carriage return and
line feed.
3. Press the TAB key observing the cursor advancing ten (10) spaces.
4. Press the 'ESC' key twice to display "Ec' on the television
screen.
5. Press the spacebar to move cursor right one space.
6. Press 'DELETE /BACK S' to move cursor left one space.
7. Press 'CAPS/LOWER', then type alphabet to display lower case
alphabet on television screen.
8. Hold 'SHIFT' key down and press any alphabet character to display
upper case alphabet character on television screen.
9. Press the inverse video key (key with ATARI logo) then type any
character to check inverse video feature.
10. Hold down 'CTRL' (Control) key and press '↓' key and observe that
the cursor moves down on the television screen. Use the 'CTRL' key
and the cursor control keys to move the cursor upr right and left.
11. Press the 'SYSTEM RESET' key to clear the television screen and
display the Memo Pad Logo.
If any of the above keyboard tests fail refer to paragraph 5.4,
Troubleshooting. If the system displays none of the preceeding
faults, continue to the Stand Alone Test.
5-6 System Service Manual
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