e-STUDIO556/656/756/856(Ver03) © 2012 TOSHIBA TEC CORPORATION All rights reserved
ERROR CODE AND TROUBLESHOOTING
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[F901] Engine speed error (first time)
[F901_1] Engine speed error (after the first time)
Classification Error item
Other service call The speed information of the LGC board is damaged.
The LGC board in which is not corresponding to the equipment model is
installed.
The F901_1 error occurs when the power is turned ON if the LGC board is
not replaced in the correct procedure after the F901 error.
Check item Measures
Harness Check if there is no problem in the harness for connecting to the following
connector.
LGC board: CN341
LGC board Check if the LGC board in which is corresponded to the equipment model
is installed.
Check if the label color of the LGC board (indicated in the figure with the
arrow) is corresponded to the equipment model (indicated on the rating
label).
e-STUDIO556: White
e-STUDIO656: Yellow
e-STUDIO756: Pink
e-STUDIO856: Blue
• Position of the label to be checked
If they are not corresponding correctly, replace the LGC board with the
correct one by referring to the procedures described below.
Reference: "9.2.5 Procedures when replacing the LGC board"
The F901_1 may occur especially when the equipment is not
started up with the 08 mode according to the procedures when
replacing the LGC board.
Replace parts Remarks
Harness
LGC board
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