4. Troubleshooting
1000-A2-GN22-00
4-12
February 2003
Power System
Troubleshooting
The CPX requires
−
48V power from a plant battery source. Two
−
48Vdc inputs (A and B) are wired to the CPX, so that if one input
to the system fails, the other maintains power. Input A delivers
power to the left and center power supply modules; Input B
delivers power to the center and right power supply modules.
The CPX has three load-sharing power supplies, which deliver dc
voltage to all of the plug-in modules. A circuit breaker located on
the CPX rear panel, provides equipment electrical protection
(
Figure 4–2
).
Figure 4–2. Power Panel and Circuit Breaker
After you apply power to the CPX, if none of its front panel
indicators light, and if its internal fans are not working, refer to
Table 4–9
for troubleshooting instructions.
Isolate a problem to one or more modules before troubleshooting:
Step 1
After applying power, wait at least two minutes for the system to
initialize. If none of its front panel indicators light and its internal
fans are off, see Troubleshooting Instructions (
Table 4–9
).
0069
16
15
14
13
12
11
7
9
6
8
10
5
4
3
2
1
DC -48V
DC -48V
RTN
DC -48V
DC -48V
RTN
To
Plant Battery "A"
-48V R
T
N
-48V
To
Plant Battery "B"
-48V
-48V R
T
N
Plant
Battery A
Barrier Strip
Frame
Ground
Points
(requires
10-32 x 1/4"
screws)
Circuit
Breaker
Plant
Battery B
Barrier Strip
Open Protective Guards
Summary of Contents for Jetstream CPX-1000
Page 14: ...Preface 1000 A2 GN22 00 x February 2003...
Page 24: ...1 Voice over Broadband Networking 1000 A2 GN22 00 1 10 February 2003...
Page 64: ...2 CPX 1000 Voice Services Platform Description 1000 A2 GN22 00 2 40 February 2003...
Page 100: ...3 Installing the CPX 1000 1000 A2 GN22 00 3 36 February 2003...
Page 128: ...5 Repair Procedures 1000 A2 GN22 00 5 14 February 2003...
Page 156: ...D Specifications 1000 A2 GN22 00 D 8 February 2003...
