Replacing The Dc Fan - Sony HDCU3300 Maintenance Manual

2-1-3. Replacing the DC Fan

c
If the fan is defective, the temperature inside HDCU3300
will rise. Touching the inside of the unit in this state may
cause a burn.
Replace the parts after turning off the power and cooling
the inside.
The fans that are used in the rear panel of HDCU3300 are
recommended replacement parts.
The lifespan of these fans is about 30,000 hours, which
means that the fans can be used for about three and a half
years if the power is on all the time, so as a guideline the
fans should be replaced every three and a half years.
Two types of power supply units are installed in this unit,
and the DC fan to be replaced and replacement method are
different for each type.
This section describes replacement method for the follow-
ing items.
. Replacing the DC fan of switching regulator
(1-468-945-21)
. Replacing the DC fan of power block assembly (A10)
(A-1768-444-A)
Replacing the DC Fan of Switching Regulator
(1-468-945-21)
When replacing, be sure to use the specified part.
DC fan: 9-885-092-89
1. Turn off the main power and disconnect the plug from
the outlet.
2. Remove the switching regulator.
(Refer to Section 2-1-1.)
3. Remove the six screws and remove the cover.
4. Remove the harness from the wire clamp.
5. Disconnect the harness from the connector J19.
6. Remove the four screws and remove the fan portion.
2-6 (E)
Cover
PSW3 x 6
PSW3 x 6
Switching regulator
J19
7. Remove the three screws and remove the fan bracket.
8. Remove the DC fan and mesh from the fan cover.
Fan cover
Mesh
DC fan
Fan bracket
9. Install the DC fan in the reverse order.
n
Install the DC fan in the direction shown in the
diagram above.
Fan portion
Wire clamp
PSW3 x 6
Harness
PSW3 x 6
B3 x 35
A
Diagram seen from
the direction of arrow A
The labeled side faces
the front
HDCU3300/MM (J, E)