Advertisement
Replacing the flexible PCB item 54
— Demount the RAFOC unit.
-— Desoider the connections A (see Fig. 3) of the flexible
PCB.
38 221 C12
Fig. 3
— Before desoidering the connections C of the
photodiode PCB, the positions of the connecting points
of the photodiode PCB should be marked, so that
afterwards the PCB can correctly be replaced.
— Now the 6 connections C of the photodiode PCB can
be desoldered by heating the pins C one by one until
the flexible PCB comes loose.
This should be done very carefully.
— Desolder the 4 connections of the radial coils.
Mounting the flexible PCB (item 54).
-— Solder the 4 connections of the radial coils.
— Apply the connections A and B (see Fig. 3).
-— Before the 6 connections of the photodiode PCB can
be soldered, they should be provided with an extra
coating of tin.
— Place the flexible PCB under the photodiode PCB.
— In order to hold this position, the flexible PCB may be
supported (for example by an expanded paper-clip
between the arm and the underside of the flexible PCB).
— Then the 6 connections C can be heated so that they
become soldered to the photodiode PCB.
Replacing electrical components
— If one of the following components is defective:
photodiodes, laser diode, focus motor, radial actuator
turntable motor, the entire CDM unit should be replaced.
3-2
CS 9 487 &
Advertisement
