Vhs) Caution After Replacing Vhs Microprocessor (Ic6001); Dvd) Standard Inspection Specifications After Making Repairs - Panasonic DMR-E75VP Service Manual

17.3. (VHS) Caution after replacing VHS Microprocessor (IC6001)

After replacing VHS Microprocessor (IC6001), turn VHS section into FACRORY mode so that IC6001 should be initialized.
18 (DVD) Standard Inspection Specifications after Making
Repairs
After making repairs, we recommend performing the following inspection, to check normal operation.
No.
1 Turn on the power, and confirm items pointed out.
2 Insert RAM disc.
3 Enter the EE (TU IN / AV IN - AV OUT) mode.
4 Perform auto recording and playback for one minute using the RAM
disc.
5 If a problem is caused by a VCD, DVD-R, DVD-Video, Audio-CD, or
MP3, playback the test disc.
6 After checking and making repairs, upgrade the firmware to the
latest version.
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).
8 When replacing of RAM drive, transfer [9] [5] in the service mode
setting to delete Laser used time.
Use the following checklist to establish the judgement criteria for the picture and sound.
Item
Block noise
Crosscut noise
Dot noise
Picture
Picture disruption
Not bright enough
Too bright
Flickering color
Color fading
Procedure
Contents Check
Items pointed out should reappear.
The Panasonic RAM disc should be recognized.
No abnormality should be seen in the picture, sound or operation.
No abnormality should be seen in the picture, sound or operation.
No abnormality should be seen in the picture, sound or operation.
Make sure that [FIRM_SUCCESS] appears in the FL displays.
*[UNSUPPORT] display means the unit is already updated to
newest same version. Then version up is not necessary.
Make sure that [CLR SERV] appears in the FL display.
After checking it, turn the power off.
Make sure that [CLR LASER] appears in the FL display.
After that, turn power off.
Item
Distorted sound
Noise (static, background noise, etc.)
The sound level is too low.
Sound
The sound level is too high.
The sound level changes.
53
Item to Check
Contents Check
DMR-E75VP