Panasonic DMP-BD75GA, Service Manual

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10.2. Caution for Replacing Parts
10.2.1. Items that should be done after replacing parts
10.2.2. Standard Inspection Specifications after Making Repairs
After making repairs, we recommend performing the following inspection, to check normal operation.
Use the following checklist to establish the judgement criteria for the picture and sound.
No. Procedure Item to Check
1 Turn on the power, and confirm items pointed out. Items pointed out should reappear.
2 Insert RAM disc. The Panasonic RAM disc should be recognized.
3 Perform playback for one minute using the RAM disc. No abnormality should be seen in the picture, sound or operation.
*Panasonic DVD-RAM disc should be used when recording and
playback.
4 Perform playback for one minute using the BD-Video disc. No abnormality should be seen in the picture, sound or operation.
5 If a problem is caused by a BD-Video disc, VCD, DVD-R,
DVD-Video, Audio-CD, or MP3, playback the test disc. No abnormality should be seen in the picture, sound or operation.
6 After checking and making repairs, upgrade the firmware to the
latest version. Make sure that [UPD OK] appears in the FL displays.
*[UNSUPPORT] display means the unit is already updated to
newest same version. Then version up is not necessary.
7 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 in the FL display.
After checking it, turn the power off.
Item Contents Check Item Contents Check
Picture
Block noise
Sound
Distorted sound
Crosscut noise Noise (static, background noise, etc.)
Dot noise The sound level is too low.
Picture disruption The sound level is too high.
Not bright enough The sound level changes.
Too bright
Flickering colour
Colour fading