Nortel DMS-100 Series Maintenance Manual page 272

7-36 Alarm clearing procedures
OPAC talk battery alarm
Critical
(continued)
37
38
39
40
41
42
43
44
297-8211-550 Standard 05.01 August 1999
DANGER
Risk of electrocution
Some terminals in the MSP have electrical potential.
Remove all jewelry before you perform this step.
Connect the leads of the capacitor forming tool across the top and bottom
terminals with wires attached to them, top and second from the bottom
terminals, of the tripped circuit breaker.
If, after 1 min, the bulb
is lit and you did not replace the
capacitor
is lit and you did replace the
capacitor
is not lit
Locate the talk battery filter capacitor in the MSP.
If the circuit breaker
is CB2
is CB4
Obtain a replacement capacitor.
Label the leads that go to the positive capacitor terminal as (+) and label the
leads that go to the negative capacitor terminal as (–). This procedure prevents
a reversal of the leads.
Disconnect the leads from the short-circuited capacitor.
Remove the capacitor.
Install a replacement capacitor.
Connect the leads labeled (+) to the positive capacitor terminal and the leads
labeled (–) to the negative capacitor terminal. Go to step 37.
Do
step 38
step 56
step 45
The capacitor to replace
is C1
is C2