Panasonic DMR-ES20EG Service Manual

Contents

13 Caution after replacing parts13.1. After replacing the RAM Drive with new one13.2. When the unit does not operate normally after replacing the TimerMicroprocessor 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 TimerMicroprocessor.Step Operation Descriptions1 While power is ON, short IC7502-4 pin (RESET) and the GNDmomentarily.“RESET (L)” is transmitted to the XRESET of TimerMicroprocessor (IC7501-11 pin), then the unit operatesnormally.14 Standard Inspection Specifications after Making RepairsAfter making repairs, we recommend performing the following inspection, to check normal operation.No. Procedure Item to Check1 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 RAMdisc.No abnormality should be seen in the picture, sound or operation.*Panasonic DVD-RAM disc should be used when recording andplayback.5 If a problem is caused by a VCD, DVD-R, DVD-Video, Audio-CD, orMP3, 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 thelatest version.Make sure that [FIRM_SUCCESS] appears in the FL displays.*[UNSUPPORT] display means the unit is already updated tonewest same version. Then version up is not necessary.7 Transfer [9][9] in the service mode setting, and initialize the servicesettings (return various settings and error information to theirdefault 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.8 When replacing of RAM drive, transfer [9] [5] in the service modesetting 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 CheckPictureBlock noiseSoundDistorted soundCrosscut 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 brightFlickering colorColor fading28DMR-ES20EG / DMR-ES20EP / DMR-ES20EE