AT&T Merlin 820 Service And Maintenance Manual page 55

Communications system

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Trouble on One Voice Terminal

Warning: Remove control unit ac power (using the control unit

On/Off switch) before inserting or removing a

expansion module. If you are using an auxiliary

power unit, unplug it from the ac outlet.

Step 11.

Switch the expansion modules back to their original position.

Step 12.

Reconnect all of the modular terminal cords and line cords to their origi-

nal position.

Step 13.

Return ac power to the control unit.

Read the section on Maintenance Exchange Procedures at the end of this

Step 14.

manual to obtain a replacement for the defective component.

Page 52

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