3
D-NE240/NE241/NE241CK
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S811. (push switch type)
The following checking method for the laser diode is operable.
• Method:
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. With a disc not set, turn on the S811 with a screwdriver having
a thin tip as shown in Fig.1.
3. Push the
u
button.
4. Observing the objective lens, check that the laser diode emits
light.
When the laser diode does not emit light, automatic power
control circuit or optical pickup is faulty.
In this operation, the objective lens will move up and down 4
times along with inward motion for the focus search.
SECTION 1
SERVICING NOTES
Fig. 1 Method to push the S811
S811
S811
MAIN board
OPERATION CHECK WHEN THE LID IS OPEN
In performing the repair with the power supplied to the set, removing
the MAIN board causes the set to be disabled.
In such a case, make a solder bridge to short SL801 (OPEN/CLOSE)
on the MAIN board in advance.
– MAIN Board (Component Side) –
•
Abbreviation
E92
: 120V AC area in E model
MX
: Mexican model
COLOR VARIATION
Model
Destination
COLOR
BLACK
SILVER
D-NE240
AEP
z
z
AEP
z
z
D-NE241
E92
z
MX
z
D-NE241CK
MX
z
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.
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 emis-
sion, observe from more than 30 cm away from the objective lens.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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