Teletype 43K001/AAA, Repair Manual

Page: 38 / 82

525, 3-6
C. DISASSEMBLY (Contd)
1. 43K101 KEYBOARD (KSR and
(Contd)
To reassemble the keyswitch:
Insert new keyswitch, observe position of the
locating lug, and press keyswitch into channel.
Switch must snap fully into front and rear channel
tines. Hold keyswitch in place and resolder.
Cable (KSR)
To remove the cable:
(a) Remove the PRINTER TEST, PARITY,
DUPLEX and CPS keytops. (Refer to
to KEYTOPS, Page 3-3).
(b) Remove INTERLOCK, PRINTER TEST,
PARITY, DUPLEX and CPS keyswitches
(Fig. 19). (Refer to Keyswitches, Page 3-5).
KEY SWITCHES
Fig. 19-Keyswitch Identification
(c) Remove solder from around connector
pins of cable to be removed (Fig. 20).
4
4
4
4
4
•
4
•
......._SOLDER
REMOVED
Fig. 20-connector Pins
Warning: Use a grounded, low-wattage solder­
ing iron (avoid prolonged contact with pins) along
with a desoldering tool to prevent damage to card
circuits and components.
(d) Remove the circuit card cover located in
front of the control keys from the channel.
Use a spring hook to remove the cover from
the mounting posts (Fig. 21).
SPRING HOOK
(Pull
Up)
(Top
View)
Fig. 21-cover Removal
(e) Cut the cable tie securing the cable to the
circuit card.
(f)
Grasp the cable connector using thumb
and index finger.
(g) Exert upward force until cable connector
releases (Fig. 22).
(Top View)
Fig. 22-cable Connector Removal
(h) Remove rear plate (Fig. 23).
(i) Slide cable to the right until it clears the
circuit card. Remove through opening
between channels (Fig. 23).
(Right Rear View)
Fig. 23-cable Removal