JVC KD-NX901 Service Manual page 31

4.7 ROM correction of the main microcomputer and panel microcomputer
The RAM correction of the main microcomputer and panel microcomputer from the CD-R/RW or DVD-R/RW.
4.7.1 Making the disk for ROM correction
(1) Prepare the CD-R or CD-RW or DVD-R or DVD-RW.
Note:
Do not use DVD+R and DVD+RW.
(2) The two provided files put into the [ROOT].
Do not make file folder.
(3) The disk write by the [Disk at once].
4.7.2 ROM correction
(1) Loading the ROM correction disk.
(2) Displayed the [ROM CORR] in updating.
It takes about ten minutes.
Note:
Do not turn off the power. The unit will not restart.
(3) Eject the disk after [OK xxxx Please Eject] displayed.
Note:
The numbers [xxxx] for microcomputer management within factory.
(4) After the ROM correction, should reset a main unit.
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