Sony BCU-100 Maintenance Manual page 36

All Checks
This mode executes the diagnosis for all the items from 2 to 5. Execute this to identify the defective
location. The following check items can also be diagnosed individually.
FAN Check
Checks the rotation rate of the five fans (including the power supply fan) mounted on the unit. For
fans 1 to 5, rotation rate of 5,000 to 5,999 rpm (controlled by Duty 20%) is judged as normal, and for
the power supply fan, 14,000 to 14,999 rpm.
Firmware Memory Check
Checks the entire memory field of XDR and DDR2.
Main Device Check
Checks the inside of the Cell/B.E., RSX, and SCC devices.
HDD Read Check
Executes the Read check for the sector worth 100 MB.
This does not overwrite the data in the HDD.
Return
Returns to the main menu.
(b) USB Storage Check
Check the USB I/F using the USB memory device.
Once the execution starts, the following dialog appears. Check the connection of the USB memory
devices (one on the front, two on the rear), and press the "Yes" button to continue execution. To
cancel execution, press the "No" button to return to the pervious menu. In this check, connect the
USB memory devices to all of the two USB ports on the rear and the MAINTENANCE port (USB
connector) on the front.
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This is a Read check, so the data in the USB memory will not be damaged.
(c) MEM-122/126 Board Check
Checks the operation of the MEM-122/MEM-126 extension memory board (option).
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It takes about six minutes to complete.
1-28 (E)
BCU-100 MM