Thanks tomwil and Digado,
My problem is the procedure given in this Technical guide is successfull only when the player accepts CD . If the sets hangs in booting process,this procedure doesnot work.Also the page which was available for downloading is also removed from PASS web site. The interface hardware is also discontinued by Panasonic.
Still I can programm the flash memory by removing Flash IC from Digital PCB and after putting new firmware,the set starts working, It will be very convinient if the IC is programmed in circuit(Called ICSP...In Circuit System Programming)
The Digital PCB is a multilayer board and while removing the flash IC,sometimes the PCB gets dammage,
I have few RAM drive service manuals and a few Training Manuals and technical guides, I will upload it if needed to any friend...