For service mode press at the same time on original R.C (RM-C663 ) . buttons " DISPLAY" and
" VSM standart " ( replacement remote does not allow pressing two buttons together ) . If you have not remote RM-C663 - use any JVC ORIGINAL remote control ( with the same command system ) . Service mode code is the same . Keys combination for service mode depends on remote ( not on tv model ). For example i use RM-C695 ( service mode : DISPLAY + VSM STD ) enter into all JVC service mode. Some other R.C. :
RM-C770 - DISPLAY + CINEMA/GAME ;
RM-C795 - " i " + " mute "
RM-C873 - DISPLAY + VSM
etc.
For VHF service mode will not help you.. Add fifth diode ( counting from tv front side ) into diodes line beside processor ( processor's options diodes). Sorry i didn't find diode number in my notes.
Complete service manual : http://wimtv.be/techniforum/viewtopic.php?p=8118
Service mode describtion. Language-Polish.
