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10101010110011010101011011010101001101010100110101101101101010100101
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1
Seagate
PC-3000 EXPRESS / UDMA / PORTABLE
F3 architecture
ACE Lab
Technical support: [email protected]
Phone: +7 863 201 50 06
50
ts.acelaboratory.com
8.1.
D
isconnection of the controller board from HDA (isolation of
the spindle motor connector)
The procedure for drive initialization according to this method is as follows:
♦
While the power is off, remove the screw fixing the controller board near the motor connector, and insulate
the connector (e.g., using a sheet of dense paper or a plastic card).
♦
After a while the drive will reach readiness (as shown by the status register indicators on the utility panel).
♦
While the power is still on, remove the insulating layer and return the screw fixing the controller board
near the motor connector.
♦
Then follow the basic unlocking algorithm.
To start the mode in the utility:
♦
Select the 'Solution for problem "HDD Lock (LED: 000000CC)"' menu item.
♦
Confirm that the mode should be started.
♦
Specify the backup folder for service data storage.
♦
Select 'Isolating spindle motor contact' as the unlocking method.
♦
Follow the guidelines displayed in the main window in that mode.
Fig. 8.1
Before this window is displayed, power supply of the corresponding PC3000 channels will be turned off, i.e. you
can remove the screw and insulate the connector immediately after reading the instructions. Once you have
insulated the connector and clicked the 'Start procedure' button, the utility will perform a series of necessary
operations and ask at a certain moment to remove the insulating layer and put back the screw. When the algorithm
completes, the drive will be unlocked.
8.2.
S
hort connection of the read channel
This method is universal because it does not depend on the HDD family or FW version. Therefore it is used in the
utility as the recommended mode for unlocking in "LED: 000000CC" cases. The main operation of the method is
bridging of the differential contacts pair in the reading channel
. Short-circuit connection should be performed after the
terminal command mode becomes active (the terminal must return the F3 T> prompt), but before the LED: 000000CC
error occurs. Since the tool used for connection is going to function in a high-frequency circuit, certain restrictions
apply: its impedance (active and reactive resistance parts) must be minimal, the contact points must not be oxidized, the
1
In the end of this description you can find photographs of controller boards with indicated connection points.
However, identification of these points is sufficiently simple. They are actually the transitional openings of the
differential contacts pair of the read channel lines to the external side of the board. The differential pair is
represented by two parallel conductors from the preamplifier connector towards the processor with a resistor
soldered across them (there is no resistor on the write channel pair).
