Walter, >From Tech Repair CD: MAGNAVOX\27B8\No sound or video\Originally dead. Found D409 shorted (-13v) and vertical output IC bad.\\27B8\Disconnect the EEPROM IC345 unsolder pins 5* 6* and 8\Then turn on the set and see if you get a picture and sound. If so EEPROM is problem\\\\\\\
Philips\HD2518C101 25B800\UNDEFINED MEMORY ADDRESSES ARE ALTERED* COMPLETE SYSTEM LOCK OCCURS OR MEMORY DEVICES ARE REPLACED.\THE FOLLOWING PROCEDURE WILL DEFAULT ALL CUSTOMER* FACTORY AND SERVICE SETTINGS TO A PRE-DEFINED SETTING. UPON\EXECUTING THIS PROCEDURE THE FEATURE WORD AND SERVICE ADJUSTMENTS WILL NEED TO BE SET. STEREO ALIGNMENT WILL BE LOST.\25B800\1. Enter the Service Mode by selecting 06-25-96-Menu using the remote transmitter.\2.Service Page A should be present on screen upon entry into Service Mode. 3.Press and release Alternate Channel (A/CH or Surf) function of remote transmitter.\4. Press and release the Menu function to save the data.\5. Exit the Service Mode by repeatedly selecting the Menu or by pressing the 9 button on the remote transmitter to enter Service Page I. 6.\Press the Volume up button while in Service Page I to power the unit off.\7. Momentarily remove AC power from the chassis to complete the exit and save process. ROM Defaults are now loaded into the EEPROM.\\\ Jeff -- Intrepid Video TV/VCR Repair 263 S Front St, Steelton PA 17113 717-939-7708; (F) 717-564-4952 www.intrepid-video.com www.tech-repair.net ----- Original Message ----- From: "walter wood" <[EMAIL PROTECTED]> To: "Techs" <[EMAIL PROTECTED]> Sent: Thursday, November 04, 2004 3:49 PM Subject: [Techs] Magnavox chassis 25B800-7562 EEPROM??? > Repaired vertical, shorted vertical output ic and > D409, and D445. > Set comes on with menu in what appears to be > French, with no sound or picture. > Turning the screen control shows a full raster > with > re-trace. > Shorting pin 6 of IC346 to ground restores the > picture(as long as the short is in place). > Is there a way to restore the defaults, or is it > better to just replace the EEPROM,IC346? > TIA > Walter ===== Walter Wood United TV Service 501 Poplar St. P.O. box 602 Pulaski Tn. 38478 mailto:[EMAIL PROTECTED] _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com
