4.11
Lower System
Board.
RTe Battery
Removing the Lower System
Board·
RTC
Battery
To remove the T1900ff1900C's lower system board and RTC battery, follow the steps below
and refer
to
Figures 4-19 through 4-22.
1.
Tum
off
the power
to
the T1900ff1900C, and, ifattached, disconnect the
AC
adapter, power cord
and
all external cables connected
to
the computer.
2.
Remove the battery pack, optional memory card, optional PCMCIA card, top
cover, keyboard, HOD, display mask, display assembly, and upper system board as
described
in Sections 4.2 through 4.10.
3.
Remove the tape and
RTe
battery from the middle frame assembly (Figure 4-19).
4. Disconnect the FDD
cable from PJ202 on the lower system board (Figure 4-19).
FDDcable
i
I
I
ATC
battery
Figure
4-19 Removing
the
RTC Battery
and
FDD
Cable
5.
Remove the
Ml.Sx'
silver screw from the bottom
of
the computer (Figure 4-20).
6.
Remove the two
Ml.SdO
screws located next
to
the power supply circuits
of
the
lower system board (Figure 4-20).
7.
Open the PCMCIA expansion slot cover on the right side
of
the computer, remove
the two M2.5x6 screws securing the cover, then remove the cover.
4-25
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