Servicing Notes; General - Sony D-NF007 Service Manual

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NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down 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 emission,
observe from more than 30 cm away from the objective lens.
TE
L 13942296513
LOCATING THE CONTROLS
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SERVICING NOTES

SOUND/AVLS
i (headphones) jack
Headphones
P MODE/
VOL +*/–
OPEN
HOLD (rear)
RADIO ON/BAND
MONO
LOCAL
x ao u163
y
PRESET
i
Band
Track number/Preset number
Playing time/Frequency
* The button has a tactile dot.
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SECTION 1
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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. Press 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 pick-up is faulty.
In this operation, the objective lens will move up and down 2
times along with inward motion for the focus search.
S811
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Fig. 1 Method to push the S811
SECTION 2

GENERAL

DC IN 4.5 V
Display
co
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PRESET LOCAL MONO
D-NF007/NF0070
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This section is extracted from
instruction manual.
to an AC outlet
AC power adaptor
./>• (group) –/+ •
TUNE –/+
u*(play/pause)/ENTER
x (stop)•RADIO OFF
GROUP
m
MP3 indicator
Play mode
Remaining battery power
Group indicator
Sound mode
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