LTPH-SM-1052-04
Installing
Multiplexers
HMS-358 List 5 and List 6
July 14, 2002
51
I
NSTALLING
A
F
AN
A
SSEMBLY
(O
PTIONAL
)
Figure 34.
Installing the Fan Assembly (Cover Down)
The HFA-357 fan assembly is installed from the front of the chassis, above the multiplexer tray.
The fans begin operating as soon as the cable is connected. Avoid contact with the fan blades
and do not allow any foreign matter to obstruct the operation of the fan blades.
Do not install fans without connecting the cable. A fan assembly that is not operational will
block airflow and cause overheating.
Step
Procedure
Installer Check
ü
Whenever installing or removing units from the HMS-358 chassis, be sure to wear an
antistatic wrist strap and connect it to the ESD strap input above the HMU slot on the
inside of the chassis.
1
Unscrew the two hold-down lugs on each side of the chassis front cover. The cover folds down.
H
2
Plug your ESD wrist strap into the ESD input above the HMU slot.
H
3
Locate the keyed Molex fan cable (connected to the inside of the chassis) and attach it to the circuit
board on the fan assembly. The fans begin operating as soon as the cable is connected.
H
4
Slide the fan assembly into the opening above the multiplexer tray.
H
5
Secure the fan assembly in place with the hold-down lugs (one at each corner of the assembly).
H
6
“Placing the Fan Under HMU Management” on page 52
.
H
Installer Signature
?
Date
Fan assembly
ESD strap input
Thumb screw
Thumb screw
Molex fan cable