Sony HDW-750 Maintenance Manual page 249

6-9-2. Replacing the Fan in the Main
Unit
1. Open the inside panel assembly.
(Refer to Section 1-5.)
2. Remove the DC-DC converter.
(Refer to Section 6-8.)
3. Loosen the two precision screws A fixing the
FRK holder and remove the FRK holder in
the direction of the arrow.
n
When the sets do not use the FRK holder,
remove the two screws only .
4. Disconnect the harness and the flexible card
wire from the connectors (CN117, CN201)
on the MB-898 board.
n
Life of flexible card wire will be significantly
shortened if it is folded. Be very careful not
to fold the flexible card wire.
5. Remove the two precision screws A that are
removed in step 3. Remove the DC fan
assembly from the PC board holder (R).
6. Remove the precision screw (one screw in the
new type or two screws in the old type) and
remove the DC fan from the fan bracket (R)
assembly.
n
Two types of the fan bracket (R) assembly is
used depending on the time of production at
the factory.
7. Install the new DC fan by reversing the steps
of removal.
n
When attaching the DC fan, the fan must be
attached in the direction as shown in the
illustration.
HDW-750/750CE V1
Precision screws
P1.4 x 3.5
D.C. fan
PC board holder (R)
Precision screws
P1.4 x 3.5
D.C. fan
CN117
CN201
MB-898 board
* : Depending on the time of production at the factory,
there are sets that do not use the FRK holder.
Direction of the fan when viewed from the direction of the arrow B.
6-9. Fan Replacement
Fan bracket (R)
assembly
(old type)
B
(See the
illustration
below.)
Fan bracket (R)
assembly
(new type)
Flexible card wire
Precision screws
P1.4 x 3.5
A
FRK holder*
6-19