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5
HCD-RH1000/RH7000
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.
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.
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
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
that the S curve waveforms is output three times.
NOTES DURING THE FORCED EJECTION
1. If the forced ejection is executed while a blank disc media
(DVDRW,
±R) exists on the tray.
• Insert a DVD-ROM (DVD test disc, DVD software available
on the market, or the like) in the tray and then close the tray.
Note1:
If you close the tray while it is empty, ejection of the tray
becomes impossible.
becomes impossible.
Note2:
If you close the tray with a CD disc inserted in it, the CD can
be ejected. However, if you close the tray while it is empty,
there can be a case that ejection of the tray becomes
impossible.
be ejected. However, if you close the tray while it is empty,
there can be a case that ejection of the tray becomes
impossible.
Note3:
Even if you replace the DVD drive unit while the tray remains
under the state as described above, the situation cannot be
improved.
under the state as described above, the situation cannot be
improved.
2. If the tray cannot be ejected while the disc is not inserted.
• Execute the forced ejection.
• Insert a DVD-ROM (DVD test disc, DVD software available
on the market, or the like) on the tray and try to close the tray.
(There are cases that it recovers the trouble)
3. Contents of forcedly ejected blank disc media (DVDRW,
±R)
can be damaged. (There can be a case that initialization is also
impossible)
impossible)
DISC REMOVAL PROCEDURE IF THE TRAY CANNOT BE EJECTED (FORCED EJECTION)
1. Remove the upper case.
2. Remove the RD-053AU board, RD bracket.
3. Insert and push the stiff wire in the hole and eject the tray.
2. Remove the RD-053AU board, RD bracket.
3. Insert and push the stiff wire in the hole and eject the tray.
stiff wire
tray
hole
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