4
HAR-D1000
SECTION 1
SERVICING NOTES
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.
For CD
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 AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
MODEL IDENTIFICATION
— BACK PANEL —
Part No.
(Figure A)
CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP
• In cleaning the objective lens of optical pick-up, be sure the
following below.
1.
In cleaning the lens, do not apply an excessive force.
As the optical pick-up is vulnerable, application of excessive
force could damage the lens holder.
2.
In cleaning, do not use a cleaner other than exclusive cleaning
liquid (KK-91 or isopropyl alcohol).
3.
Wipe the objective lens spirally from center toward outside.
(See Figure A)
4.
Eject the disk, if loaded.
5.
Disconnect the power cord from the socket to shut off the power
supply.
6.
When cleaning the objective lens of optical pick-up in CD,
refer to “HOLDER (BU) ASSY” on page 12.
JIG FOR CHECKING MAIN BOARD SIDE A
Model
Part No.
US model
4-236-498-0
s
AEP model
4-236-498-1
s
NOTES ON HARD DISC
The hard disc has a high storage density and reads or writes data in
a short time with compared to the floppy disk. On the other hand, it
may be easily damaged by mechanical vibration, shock or dust.
Keep the hard disc away from magnets.
Although the hard disc has safety devices to prevent losing data due
to mechanical vibration, shock or dust, you should be careful when
handling the recorder. Avoid damaging your data:
• Do not cause a shock or strong vibration to the recorder.
• Do not place the recorder in a location subject to mechanical
vibration or in unstable location.
• Do not move the recorder while the power is on.
• Do not turn off the recorder while the HDD indicator lights up
blue.
• Do not use the recorder in a place subject to extreme changes in
temperature (temperature gradient less than 18 °F (10 °C)/ hour).
• Keep any magnetic objects, including a TV set, speaker, magnet,
and magnetic bracelet, away from the recorder.
If the hard disc is damaged, data cannot be restored or recovered.
JIG
(J-2501-202-A)
SUB board
hard disk
Note:
Please refer to “3-6. HARD DISK” of page 11 SECTION 3
DISASSEMBLY about how to remove a hard disk.
JIG FOR CHECKING SUB BOARD SIDE B AND
MAIN BOARD SIDE B
insulated sheet
JIG
(J-2501-202-A)
MAIN board
SUB board
JIG
(J-2501-091-A)
