Toshiba e-STUDIO556 Service Manual page 823

9.1.5 SYS board case
(1) Take off the SYS board cover.
 P.9-1 "9.1.1 SYS board cover"
(2) Remove 8 screws to take off the SYS board
case [9.1.3].
Note:
When any option is installed, take off the
option first and then take off the SYS board.
9.1.6 Logic PC board (LGC board)
(1) Take off the rear cover.
( P.4-5 "4.1.13 Rear cover")
(2) Loosen 8 screws and take off the LGC board
cover by sliding it to the right side.
(3) Disconnect 20 connectors of the LGC board.
(4) Remove 6 screws to take off the LGC board.
Notes:
When replacing the LGC board, remove
IC27 from the old board and then install it on
the new one.
• When installing NVRAM(IC27), be sure
that its pins are attached in the correct
direction and not misaligned.
• Do not touch the pins of NVRAM(IC27)
with your bare hands. (Be careful of static
electricity.)
• Replace the LGC board following "9.2.6
Procedures and settings when replacing
the SLG board (for e-STUDIO556/656/
756/856)".
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[9.1.3]
Fig. 9-12
LGC board cover
Fig. 9-13
LGC board
Fig. 9-14
e-STUDIO556/656/756/856/557/657/757/857
REPLACEMENT OF PC BOARDS / HDD
9 - 5
NVRAM
9