Panasonic DMR-EH54DEG, Руководство по обслуживанию

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14 CAUTION AFTER REPLACING PARTS
14.1. AFTER REPLACING THE DVD-RAM DRIVE WITH NEW ONE
After replacing RAM drive unit, TEST mode is not necessary. Please confirm operation for RAM drive.
14.2. 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 Operation Descriptions
1 While power is ON, short IC7502-4 pin (RESET) and the
GND momentarily. “RESET (L)” is transmitted to the XRESET of Timer
Microprocessor (IC7501-11 pin), then the unit operates normally.
15 STANDARD INSPECTION SPECIFICATIONS AFTER
MAKING REPAIRS
After making repairs, we recommend performing the following inspection, to check normal operation.
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 Model with the HDD: Problem auto recording and playback for
one minute using the HDD. No abnormality should be seen in the picture, sound or
operation.
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: In case of that the
trouble is caused by SD card and/or DV terminal. Models with SD Card Slot 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.
8 After checking and making repairs, upgrade the firmware to the
latest version. 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.
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 SERV] appears in the FL display.
After checking it, turn the power off.
10 When replacing of RAM drive, transfer [9] [5] in the service
mode setting to delete Laser used time. Make sure that [CLR LASER] appears in the FL display.
After that, turn power off.
Use the following checklist to establish the judgement criteria for the picture and sound.
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
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DMR-EH54DEG