Table of Contents
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SYNIPTOM INDEX
(Cont)
Symptom
Diagram Sheet or
Direct Action Repair
1. DISPLAY MALFUNCTIONS
(Cont)
F. Indicators:
1. No indicators light. (Characters and cursor normal.)
*2. One indicator fails to light
. . . . .
*3. One indicator lit when it should not
be . . . . . .
2. KEYBOARD MALFUNCTIONS
Note: If card reader feature is installed on failing display station, remove card reader
feature logic card at location N2, and move keyboard cable from socket Z4 to socket Z1.
If keyboard operates correctly with card removed and cable swapped, change card N2,
and return keyboard cable to socket Z4. If keyboard still fails with card removed and
cable swapped, select symptom that best describes failure.
A. All Keys
Sheet 11
Sheet 11
Sheet
9
1. Keyboard inoperative
. . . . . . . . . . . . . . . . . . . . . . . . .
Sheet 12
2. Keyboard operation erratic (INPUT INHIBITED on after certain keys.)
Sheet 12
3. Diagonal row of dots appears starting at lower left corner of screen as characters
enter. INPUT INHIBITED not lighted
. . . . . . . . . . . . . . . . . .
Change card J2.
B. Character Keys:
1. Wrong character for one key
2. Wrong character for more than one key
3. No characters enter for all keys
. . .
. . . . . . . . . . . . . . .
*3a. Correct character enters, but INPUT INHIBITED lights for one or more keys
4. No character enters for all keys; cursor advances with each key depression. Dots
may appear on one line. (INPUT INHIBITED indicator does not light.)
*5. Alpha characters enter into "numeric only" fields. (Verify that keyboard
numeric lock feature is installed. See Diag 6-10.) . . . .
*6. Numeric characters cannot enter in "numeric only" fields
7. Typamatic failures
. . . . . . . . . . . . . . . .
8. Cursor disappears when character enters
. . . . . . . . . . . . .
9. Cl)aracters entered not displayed. Cursor move keys work correctly. (INPUT
See
keyboard
procedure 5.1.4.
Sheet 12
Sheet 13
Sheet 7
Sheet 13
Sheet 13
Change card B2.
See
keyboard
procedure 5.1.4.
Sheet 14
check
check
INHIBITED not lighted.)
. . . . . . . . . . . . . . . . . . .
Change cards A2, B2. G2.
• Requires a formatted buffer.
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