Advertisement
Adjustment method
This model has the TEST mode for simple diagnosis of the internal function. Use the TEST mode for diagnosing and checking
the set as mentioned below.
Details of the TEST mode
The TEST mode comprises the five modes of the following.
1.DVD AUDIO copyright protection key serial indication
Indicates the content of the DVD AUDIO copyright at shipment. Use this mode for checking it.
2.Microcomputer's version number indication
Indicates the initial version number of the microcomputer at shipment. Use this mode for checking it.
3.Servo signal system check mode
Use this mode for checking the laser pickup status.
4.Indication check mode
The LED's and FL of the set go on in full. Use this mode for checking indications.
5.Microcomputer software upgrading mode
Use this mode for upgrading the microcomputer software.
How to set the TEST mode
1.While pressing the STOP key and PLAY key of the set together, plug in the power cord.
*Continue to pressing both the STOP key and PLAY key until reading of disk data completes (until the "NOW READING"
message changes into a DVD logo).
2."TEST *" message appears on the FL. (* In the part of the sign, the sign is different according to the destination.)
3.The five modes of the TEST mode change one after another each time the DISPLAY OFF key of the set is pressed.
4.To recover the usual operation mode, turn off the set by pressing the POWER ON/OFF key.
How to check the laser pickup
Since the laser pickup of the set is easily affected by static electricity, heat, etc., it may be damaged depending on use
condition. If the set shows such a symptom as it fails in reading disk data, check the laser pickup as follows.
* Checking laser current
1.Enter the set into the "servo signal system check mode" of the TEST mode.
2.Press the SKIP |
key of the set.
The laser is turned on and the LAS **** message appears on the FL display. **** in the message indicates the current
in code. For knowing the actual laser current, read the first two figures (omitting the last two figures) and convert the
number into the current (mA) referring to the following conversion table, because the FL indication is a hexadecimal
number. Since the FL indication varies because of self-heating of the set, read the indication value about 20 seconds
after the set was turned on. If the indicated value is the OK level (see the conversion table), the laser is judged to be
normal in the initial status by this simple checking method.
3. Press the STOP key to set back the check mode to the initial status.
FL indication Current (mA) Judgment
Laser current conversion table
FL indication Current (mA) Judgment
FL indication (*: numeral)
The FL and LED's go on in full.
FL indication Current (mA) Judgment
XV-D721BK
XV-D723GD
********
**_**_**
CHECK
UPGRADE
1-11
Advertisement
