Technical information

Technician’s Handbook
62
Replacing Circuit Cards
Wear an anti-static wrist strap whenever you handle circuit cards.
Replacing Peripheral Interface Cards
You may replace the peripheral interface cards with the power on.
1. From the maintenance terminal select:
DIAGNOSTICS
MORE_KEYS
BUSY-OUT
<bay/slot/circuit> (plid of faulty card).
2. Wait until all the circuits are busied out.
3. Replace the faulty card with a new card of the same type.
4. To return the circuits to service, select:
DIAGNOSTICS
MORE_KEYS
RET-TO-SVC <plid>.
WARNING: Hazardous voltages can exist on installed
peripheral cards even when power is removed from the
system. Grasp cards by the lock latches only. Do not touch
the sides of cards.
Power must be off when inserting the Main Control card,
Bay Control Card, Control FIM Carrier Card, or Bay Power
Supply. Cards that must not be inserted while system power
is on carry a caution notice.
Set switches or jumpers on the new card to match switches or
jumpers on the existing card.