Driver Board; Replacing The Power Assembly - Sony HDC-900 Maintenance Manual

2-2. Replacing the Filter Disk Unit

2-3. Replacing the Power Assembly

2-2-3. Driver Board

1. Remove the filter disk unit. (Refer to Section 2-2-1.)
2. Remove the four screws.
3. Disconnect the harness connector from the connector
of driver board, and remove the driver board.
Driver board
4. Install the new driver board in the reverse order of
steps 1 to 3.
Adjustment
After replacement, filter positioning adjustment is re-
quired.
Refer to Section 6-8 for details on adjustment.
2-4 (E)
2-3. Replacing the Power Assembly
m
. To avoid electric hazards when disconnecting the power
assembly, allow at least three minutes after powering off.
To turn off the power, disconnect the optical cable or the
cable connected at the DC IN connector in addition to
turning off the power switch.
. The power assembly will go very hot during operation. If
you touch the power assembly, there is some danger to
get burned. When you repair power supply and peripher-
al equipment, allow a few minutes after powering off
until the inside cools off.
1. Open the right side panel. (Refer to Section 1-4 of the
Installation and Maintenance Manual.)
2. Loosen the two screws, and up the lever in the arrow
direction to remove the power assembly.
P2.6 x 5
P2.6 x 5
3. Install the new power assembly in the reverse order of
steps 1 and 2.
[Note|at|installation]
When installing the power assembly, make sure the
flexible card wire of the AT-131 board does not get caught.
Fit the notch on the power assembly to the protrusion on
the chassis assembly, and make sure the connector is
connected firmly.
Protrusion
Flexible card wire
AT-131 board
Connector
Notch
Lever
Power
assembly
B4 x 10
B4 x 10
HDC-900/950 MM