Paradyne 9820-2M - Manual (Page 212)

Hardware Maintenance (9820-45M)
12-4 9820-A2-GB20-20 June 2000
Replacing a Power Module
A power module requires replacement in a FrameSaver SLV 9820-45M when:
H
The front panel System PWR LED is lit. This means that one of the power
modules has failed.
H Power is applied to a power module and it is switched on, but the power
module LED does not light.
Refer all service to qualified personnel.
"
Procedure
To replace a power module:
1. For a system with redundant power, determine which power module still has
its power LED lit. This is the functional power supply.
! WARNING:
Do not pull out a power module until the power cord has been
removed.
2. Remove the power cord from the failed power module.
3. Unscrew the captive screw holding the failed power module in place.
4. Pull out the power module and set it aside.
5. Slide in the new power module until it seats in its connector. Verify that the
switch is in the Off position.
6. Tighten the captive screw.
7. Replace the power cord. Move the power module switch to the On position.
8. Verify that the power module LED is lit and that the front panel System PWR
LED is off.