AT&T Merlin 820 Service And Maintenance Manual page 49

Trouble on One Voice Terminal
Step 12. Inspect the wiring between the 103A Modular Jacks (Figure 18) or between
the 103A Modular Jack and jack panel (Figure 19) for damage.
VOICE
TERMINAL
Figure 18—Wiring with Jacks and Cables
103A MODULAR
VOICE
TERMINAL
DW8A–SE
SINGLE–ENDED
CABLE
Figure 19—Wiring with Jack, Jack Panel, and Cable
After checking for outer damage, remove the cover from the modular jacks
Step 13.
for the voice terminal with trouble. (Loosen the center screw, but do not
remove the screw from the cover. Remove the two plastic caps by pulling
them straight up.) See Figure 20.
Page 46
103 MODULAR
JACKS
VOICE TERMINAL
CABLE
JACK
CONTROL UNIT
CONTROL UNIT
JACK
PANEL