Panasonic VDR-M70EG Service Manual

Also see for VDR-M50EB: Operating instructions Operating instructions

Panasonic VDR-M70EG Service Manual Manual pdf 50 page image

4.7. TROUBLE DIAGNOSISInformation:1) Use the VFK0631 adapter/charger to power VDR-M70/M50 for trouble diagnosis.2) The trouble diagnosis table was prepared presupposing that the circuit boards have beennormally attached and connected. Therefore, make sure beforehand that the circuit boards arecorrectly connected, that connectors and cables are not damaged, and that the status of theirconnections is correct.Prohibition:During trouble diagnosis, never look directly into the objective lens of optical pickup block in disc driveunit, and take great care that the reflected laser beam does not enter your eye.4.7.1. Trouble diagnosis tableInterpreting the trouble diagnosis table:1) Search for the defective symptom. If there are multiple check points or multiple details of checkfor one symptom, check the items from the top down.2) Set the VDR-M70/M50 to a service position that matches the symptom. There are fourservice positions (A)-(D) for VDR-M70/M50. Set to the appropriate service position,referring to “Disassembly/reassembly to enable service position”.If only dashes — are entered in the service position column, trouble diagnosis is possible withoutdisassembling the VDR-M70/M50.3) Connect the measurement terminals to the check points, and collate the results with the detailsof check.Letters in brackets [ ] that follow the check points show the name and side of circuit board.Example: [MAN-A] shows that the check point exists on side A of MAN-H/MAN circuit board.Information:The MAN-H/MAN or AEL-H/AEL circuit board has some check points to which no terminals of testequipment can be directly connected even when the VDR-M70/M50 is set to a service position.Solder a lead wire of approx. 10 cm to such check points, referring to “Disassembly/reassembly toenable service position” and “circuit board diagrams”. When trouble diagnosis is complete, be sureto remove the lead wire.4) Perform troubleshooting according to the check results, referring to the troubleshooting columns.50VDR-M70EG / VDR-M70EB / VDR-M70GC / VDR-M50EG / VDR-M50EB / VDR-M50GCDownloaded From CamcorderManual.com Panasonic Manuals