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13.3. Caution for Replacing Parts
13.3.1. Standard Inspect Specifications after Repairs
After repairing Digital P.C.B. Unit and Mechanism Unit, it is recommended to perform the following inspection to ensure
normaloperation of main unit.
No.
Procedures
Item to Check
1
Turn on the power, and confirm items pointed out.
Items pointed out should reappear.
2 If a problem is caused by a BD-Video disc, DVD-R,
DVD Video, Audio-CD, or MP3, playback the test disc.
No abnormality should be seen in the picture, sound or
operation.
3
After checking and making repairs, upgrade the
firmware to the latest version.
Make sure that [UPD OK] appears on the LED displays.
* [UNSUPPORT] display means the unit is already updated
to newest same version. Then version up is not necessary.
4
Transfer [9] [9] in the service mode setting, and initialize
the service settings (return various settings and error
information to their default values. The laser time is not
included in this initialization).
Make sure that [CLR] appears on the LED display.
After checking it, turn the power off.
5 After replacing the Mechanism Unit, transfer [9] [5] in the
service mode setting, and initialize the laser used time.
Make sure that [CLR] appears on the LED display.
After checking it, turn the power off.
Use the following checklist to establish the judgment criteria for the picture and sound.
Item
Contents
Check
Picture
Block noise
Crosscut noise
Dot noise
Picture disruption
Not bright enough
Too bright
Flickering colour
Color fading
Item
Contents
Check
Sound
Distorted sound
Noise (static, background noise, etc.)
The sound level is too low.
The sound level is too high.
The sound level changes.
