Entire System Down - Merlin 3070 Service And Maintenance Manual

Entire system is down. Red and green lights on control unit are not lit. System is
Symptom:
totally inoperative.
Possible Cause
There is no ac power.
1.
2.
The ac outlet is defective.
One or more Power Modules
3.
are defective.
Control unit is defective.
4.
TROUBLE ON SEVERAL TELEPHONES
Recommended Action
Make sure the control unit is not connected to
1.
an outlet controlled by a switch. Check the
connections between the control unit, any
Auxiliary Power Units, and the ac outlet.
AC power hookup
2.
Test the outlet by plugging in a lamp or radio.
3.
Replace the Power Module(s) if ac power is
present, the connections are correct, and the
system is still down.
If the system is still down, replace the control
4.
unit.

Entire System Down

B7-3