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DV-120-K
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1. SERVICE PRECAUTIONS
• For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit.
Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs
accompanied by reworking of soldering.
• Compared with conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 ºC.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 ºC in general, although
the temperature depends on the heat capacity of the PC board on which reworking is required and the weight of the tip of
the soldering iron.
Do NOT use a soldering iron whose tip temperature cannot be controlled.
Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting
temperatures (hard to melt/easy to harden).
The following lead-free solders are available as service parts:
• Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP1008 0.3 in dia.
The laser diode used for a pickup head may be destroyed with external static electricity.
Moreover, even if it is operating normally after repair, when static electricity discharge is
received at the time of repair, the life of the product may be shortened.
Please perform the following measure against static electricity, be careful of destruction of a
laser diode at the time of repair.
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Place the unit on a workstation equipped to protect against static electricity, such as
conductive mat.
•
Soldering iron with ground wire or ceramic type is used.
•
A worker needs to use a ground conductive wrist strap for body.
PREPARATION OF SERVICING
If the stored 4 digit password in the Rating Level menu needs to be cancelled, please follow the steps
below.
Set the D
V
D to the Stand-by Mode.
Press and hold the 'STOP' key on the front panel.
Simultaneously press and hold the POWER key on the front panel.
The 4 digit password has now been cleared.
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PARENTAL CONTROL - RATING LEVEL
4 DIGIT PASSWORD CANCELLATION
NOTE:
The above procedure will reset ALL of the player's settings to the default factory state.
