IBM 5110 Series Maintenance Analysis Procedures page 176

STU
555
KEYBOARD MAP
PAGE 6 OF 7
056
- Remove the keyboard cable at Z4.
- Probe H2- B04 (+typamatic).
Is the DOWN light on?
Y N
057
Bad H2 (base I/O) card.
058
Bad keyboard PC board (see MIM 251).
Check/ replace Z4 (keyboard) cable (see
Map 0210 and MIM 206,255).
059
Bad keyboard PC board (see MIM 251).
Check/ replace Z4 (keyboard) cable (see Map
0210 and MIM 206,255).
060
- Press all the keys one by one.
-Test the ATTN key by pressing the backspace
key until a character flashes, then press the
ATTN key. The flashing character should
disappear.
Does any key fail to function?
Y N
7
061
-Press ATTN
-Press HOLD.
- Hold the shift key down and press the
(peroid) key on the numeric keyboard.
This ensures that the 5110 is in EBCDIC
character mode.
Now check out the ability of the machine to
do a character set selection.
Does the
5110
have the KATAKANA
feature installed?
Y N
V W X
w X
MAP 0600-6
062
-Press the
$
key several times.
-Press the HOLD key.
- Hold the shift key down and press the 8 key
on the numeric keyboard.
Did the
$
characters on the display change
to ¥(yen)?
Y N
063
Bad G2 (display) card (see MAP 050 for
jumpering).
Bad H2 (base I/O) card.
Bad keyboard PC board (see MIM 251).
Check/ replace Z4 (keyboard) cable (see
Map 0210 and MIM 206,255).
064
- Press the HOLD key.
- Hold the shift key down and press the
(peroid) key on the numeric keyboard.
Go to Page
1,
Step
002,
Entry Poin1t B.
065
- Release the shift and press the
$
key several
times.
-Press the HOLD key.
- Hold the shift key down and press the 0 key on
the numeric keyboard.
Did the
$
character change on the display to
¥ (yen)?
Y N
7
y
066
Bad G2 (display) card (see MAP 050 for
jumpering).
Bad H2 (base I/O) card.
Bad keyboard PC board (see MIM 251).
Check/ replace Z4 (keyboard) cable (see Map
0210 and MIM 206,255).
01JAN79
EC 836600 PEC 835541
MAP 0600-6