Panasonic DMR-BS750EG, Service Manual

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10.3. 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 Enter the EE (TU IN / AV IN - AV OUT) mode. No abnormality should be seen in the picture, sound or operation.
4 Model with the HDD: Perform self-recording and playback for one
minute using the HDD. No abnormality should be seen in the picture, sound or operation.
5 Perform copy a program to disc and playback for one minute using
the BD-RE (V2.0) and RAM discs. No abnormality should be seen in the picture, sound or operation.
*Panasonic BD-RE (V2.0) and DVD-RAMs disc should be used
when copying and playback.
6 If a problem is caused by a VCD, DVD-R, DVD-Video, Audio-CD, or
MP3, playback the test disc. No abnormality should be seen in the picture, sound or operation.
7 Models with SD Card Slot or DV Input Jack or USB Input Jack: In
case of that the trouble is caused by SD card and/or DV terminal
and / or USB terminal. Models with SD Card or DV Input Jack;
1) SD Card: Check to be able to display and copy the picture.
2) DV terminal: Check to be able to record from DVC.
3) USB terminal: Check to be able to display and copy the picture.
8 After checking and making repairs, upgrade the firmware to the lat-
est version. Do not turn the power off until writing is complete (The tray automat-
ically opens when writing is complete.).
"NoUPDATE" message indicates that updating the version is not
necessary since the version is the latest or the same one.
9 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 LCD 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 color
Color fading