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DMR-ES20EG / DMR-ES20EP / DMR-ES20EE
13 Caution after replacing parts
13.1. After replacing the RAM Drive with new one
13.2. 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
Microprocessor.
Step
1
While power is ON, short IC7502-4 pin (RESET) and the GND
momentarily.
14 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
Operation
Procedure
Contents
"RESET (L)" is transmitted to the XRESET of Timer
Microprocessor (IC7501-11 pin), then the unit operates
normally.
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.
*Panasonic DVD-RAM disc should be used when recording and
playback.
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.
Check
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.
28
Descriptions
Item to Check
Contents
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