AT&T Merlin 820 Service And Maintenance Manual page 79

Trouble on an Accessory
AUXILIARY
POWER UNIT
AUX
POWER
Figure 37—Auxiliary Power Unit Connections
Step 2. Make sure the accessory with trouble is connected properly.
Count the number of voice terminals, hands-free units, and headset
Step 3.
adapters in your system.
Disconnect voice terminals and accessories in your system until the
Step 4.
number of terminals, hands-free units, and headset adapters is not more
than twenty. But, leave the accessory with trouble properly connected.
Caution: Disconnecting the auxiliary power unit from the ac
power source will interrupt normal service to all out-
side lines.
Disconnect the auxiliary power unit from its ac power source.
Step 5.
Disconnect the auxiliary power unit from the control unit.
Step 6.
Plug the control unit power cord into the ac outlet.
Step 7.
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AUXILIARY POWER CORD
AC AC
INPUT
OUTPUT
AUXILIARY POWER UNIT
AC POWER CORD
CONTROL UNIT
AC POWER CORD
CONTROL
UNIT
Off On
3–PRONG
AC OUTLET