Sony CDP-400 - Servicing Note; Laser Diode

CDP-400/501/S501ES/610ES
— SERVICING NOTE —
NOTES ON LASER DIODE EMISSION CHECK
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.
LASER DIODE CHECK
1. Ground servo amp board TP12 (IC102 pin 30
{LD ON)).
2. Observe the objective lens and confirm that the
jaser diode is emitting light.
servo amp board
objective lens
o
Diffused laser beam
light is visible.
CDP-400/501/S501ES/610ES
FOCUS SEARCH OPERATION CHECK
1. Block the disc detection phototransistor so that
light does not hit it.
Block with paper, etc.
servo amp board
2. Press » PLAY button.
3. Observe the objective lens and confirm the opera-
tions below.
objective lens moves up and dawn (3 times}
laser diode emits light
Diffused laser beam
light is visible.
O