AT&T Merlin 820 Service And Maintenance Manual page 95

Trouble on an Accessory
170A
CARTRIDGE
(TYPE III)
EXTRA-
ALERT
JACK
Locate a substitute extra-alert device known to be in working condition.
Step 6.
You have a substitute extra-alert
device known to be working prop-
erly,
You do not have a substitute
extra-alert device,
Unplug one malfunctioning extra-alert device from the ac power outlet, if
Step 7.
required.
At the malfunctioning extra-alert device, disconnect the modular line cord
Step 8.
coming from the Type III Cartridge.
Connect the substitute extra-alert device to the modular line cord coming
Step 9.
from the Type III Cartridge.
Page 92
CONTROL UNIT
MODULAR LINE
Figure 46—Bypassing ON/OFF Switch
IF
TO
EXTRA-ALERT
BELL OR HORN
D4CH
CORDS
THEN
Go on to Step 7.
Call your equipment supplier for
help.
KS-23053, L5
ON/OFF
SWITCH
TO
EXTRA-ALERT
BELL OR HORN