Technical information

Technician’s Handbook
148
7. Disconnect the (inactive plane) power cord from the
power source.
Wear an anti-static wrist strap whenever you handle
circuit cards.
8. Replace the old MC card with the new MC card.
Note: If you have an ETI card installed, disconnect and then
reconnect the cables as required.
9. Power up the control node (see page 138).
10.If you have a redundant system:
- From the inactive plane, enter FILE STAT REDUN.
- When the system is IN SYNCH, hold down PANEL
ENABLE and press ACTIVITY SWITCH OFF.
11.Replace the front panels.
Replacing a Peripheral Switch Controller (PSC) Card
1. If you have a redundant system, hold down PANEL EN-
ABLE and press ACTIVITY FREEZE ON.
Step 2. takes the peripheral devices connected to the
node out of service.
2. Power down the peripheral node (see page 136).
Wear an anti-static wrist strap whenever you handle
circuit cards.
3. Replace the faulty PSC card with the new PSC card.
4. Power up the peripheral node (see page 138).
5. Hold down PANEL ENABLE and press ACTIVITY
FREEZE OFF.