Teletype 43K001/AAA, Repair Manual

Page: 48 / 82

525, 3-16
·
C. DISASSEMBLY /REASSEMBLY (Contd)
2. 50K122 UNITIZED KEYBOARD (Contd)
Blocking Latching-Type Keyswitches
To block keytop in UP position:
(a) Remove the keytop (Refer to KEYTOPS,
Page 3-13).
(b) Remove the nylon retainer and spring.
420191
SPRING
Fig.
47
420161
NYLON
RETAINER
(c) Replace the nylon retainer.
(d) With the plunger pulled up, insert a
420159
stop under the retainer
as
shown in Fig.
48.
PLUNGER
Fig.
48
NYLON RETAINER
420159
STOP
(e) Replace keytop removed or use blank
keytop.
To block keytop in DOWN position:
(a) With the keytop removed, remove the
nylon retainer and spring (see Fig.
47).
(b) Assemble
108103
spacer onto plunger.
108103
SPACER
Fig.
49
PLUNGER
SLOT
(c) With plunger held in fully latched down
position, assemble
119652
retainer into
plunger slot.
108103
SPACER
Fig.
50
. 119652
RETAINER
(d) Replace keytop removed or use blank
keytop (see BLANK KEYTOPS).
BLANK KEYTOPS
The following blank keytops may be used to cover
blocked keyswitches:
Row
Control Row (Top)
Fifth Row
Fourth Row
Third Row
Second Row
First Row (Bottom)
Blank
346168
341024
341022
341010
341019
341019
108103
Spacer
.
191
Fig.
51
119652
Retainer
.025
11
.335
Fig.
52
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w