Panasonic DMR-ES20P, Руководство по обслуживанию

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11.2. After replacing the RAM Drive with new one
11.3. When the unit does not operate normally after replacing the Timer
Microprocessor or Main P.C.B.
When the unit does not operate normally after replacing the Timer Microprocessor or Main P.C.B. with new one, reset Timer Micro-
processor.
11.4. 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.
Step Operation Descriptions
1 While power is OFF, short IC7502-4 pin (RESET) and the GND momen-
tarily. “RESET (L)” is transmitted to the NRST of Timer Micro-
processor (IC7505-15 pin), then the unit operates nor-
mally.
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 Perform auto recording and 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.
5 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.
6 After checking and making repairs, upgrade the firmware to the lat-
est version. Make sure that [FIRM_SUCCESS] appears in the FL displays.
*[UNSUPPORT] display means the unit is already updated to new-
est 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 S] appears in the FL display.
After checking it, turn the power off.
8 When replacing of RAM drive, transfer [9] [5] in the service mode
setting to delete Laser used time. Make sure that [CLr 1] appears in the FL display.
After that, turn 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