CFD-Z125, CFD-Z135 - Sony Audio Service Manual (repair manual). Page 3

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The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.

•

 Code number of Chuck Plate Jig : X-4918-255-1

1. Turn POWER switch on with no disc inserted and make Function

switch to CD position.

2. Open the lid for CD.
3. Turn on S702 as following figure.
4. Press the fl button.
5. Confirm the laser diode emission while observing the objecting

lens. When there is no emission, Auto Power Control circuit or
optical pick-up is broken.
Objective lens moves up and down three times for the focus
search.

This model uses the two ceramic filters of CF1 and CF4.
You must use the same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must change two pieces together since
it’s supply two pieces in one package as a spare parts.

Mark 1

Mark 2

Center

frequency

red

—

10.70MHz

blue

—

10.67MHz

orange

—

10.73MHz

black

—

10.64MHz

white

—

10.76MHz

white

white

10.75MHz

yellow

—

10.79MHz

mark 1

mark 2

CF1,4

S702