Service Manual - Repair Of Sencore Lc103
Some technicians successfully use DeoxIT spray, though opening the relay to clean contacts with a sliver of a business card soaked in alcohol is more effective.
Detailed circuit diagrams are available through the Audio Karma Database or EEVblog forums. Repair Of Sencore Lc103 Service Manual
Often caused by the internal relay L1 . This relay frequently oxidizes, preventing a clean contact for short/open lead zeroing. Some technicians successfully use DeoxIT spray