Memory Backup Battery; Fuse And Ic Link Replacement - Sony HDW-750 Maintenance Manual

1-21. Memory Backup Battery

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The lithium battery is critical part to safe operation.
Replace the component with Sony part whose part number
appears in the manual published by Sony. If the component
is replaced by any part other than the specified ones, this
may cause a fire or electric shock.
c
When replacing the lithium battery, ensure that the battery
is installed with "+" and "_" poles connected to the
correct terminals.
An improper connection may cause an explosion or
leakage of fluid result in physical damage in the surround-
ing materials.
The BP-33 board is equipped with the data backup battery
(BT101). When replacing it, be sure to use the specified
part.
Replacement part : BT101 (on the BP-33 board)
Part name : CR-2450 (lithium battery)
! 1-528-229-41
Part No. :
Recommended replacement period : Every five years
The memory IC stores the data such as date and time. If the
backup memory battery is dead or replaced, these data are
all cleared.
Refer to "4-8-6. Setting Date and Time of Internal Watch"
in the Operation Manual to re-set the cleared data.
HDW-750/750CE V1

1-22. Fuse and IC Link Replacement

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The fuse and IC link are critical parts to safe operation.
Replace the components with Sony parts whose part
number appear in the manual published by Sony. If the
components are replaced by any parts other than the
specified ones, this may cause a fire or electric shock.
c
If a fuse or IC link is replaced while the main power is kept
on, this may cause electric shock.
Before replacing fuse or IC link, not only turn off the
POWER switch but also remove the power cable that is
connected to the DC IN connector.
The EQ-88 board is equipped with fuse. The SS-92 board
is equipped with IC link.
Any an excessive current flow due to abnormality inside
the equipment, the fuse and IC link blow. If a fuse or IC
link blows, turn off the main power of the equipment once
and inspect inside of the equipment and remove the cause
of excessive current. After that, replace the fuse and/or IC
link.
Board Ref. No.
EQ-88 F101, 102, 103
SS-92 PS201, 202
1-21. Memory Backup Battery
1-22. Fuse and IC Link Replacement
Description Part No.
Fuse !1-576-270-11
(4 A/250 V)
IC link 2 A !1-576-259-11
1-57