Huawei DBS3900 Installation Manual page 114

Fuse
If a fuse is to be replaced, the new fuse must be of the same type and specifications.
Table 1-1
this list.
Table 1-1 Fuse description
Position
Fuse
（F7000）on
pRRU3901
19040112
Fuse
（F7001）on
pRRU3901
19040110
1.2.2Electrostatic Discharge
The static electricity generated by human bodies may damage the electrostatic-sensitive
components on boards, for example, the large-scale integrated (LSI) circuits.
Human body movement, friction between human bodies and clothes, friction between shoes
and floors, or handling of plastic articles causes static electromagnetic fields on human bodies.
These static electromagnetic fields cannot be eliminated until the static is discharged.
To prevent electrostatic-sensitive components from being damaged by the static on human
bodies, you must wear a well-grounded ESD wrist strap when touching the device or handling
boards or application-specific integrated circuits (ASICs).
Figure 1-2
Issue (02)
lists the fuses that affect the safety of the device (or system). Use fuses according to
Manufacturer
LITTELFUSE
INC
CONQUER
ELECTRONICS
CO LTD
BEL FUSE INC
LITTELFUSE
INC
CONQUER
ELECTRONICS
CO LTD
BEL FUSE INC
shows how to wear an ESD wrist strap.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Type
0451010.MRL
SEF010
SSQ10
0452004.MRL
SET004
SST4
1 Safety
Rating
125VAC/DC,10 A
125VAC/DC,10 A
125VAC/86 VDC,
10 A
125VAC/DC, 4 A
125VAC, 32
VDC, 4 A
125VAC, 4 A
1-9