Sharp CD-SW250DVD, Service Manual

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CD-SW250DVD
2 – 6
3.4. ROM Rewrite Mode
1. Creating version upgrade disc
• Write the following three files on CD-R/CD-RW.
• ********.upd
(********: Names differ according to versions)
• Write the files at lowest possible speed.
• Do not mix other data.
2. During normal power-on, insert the version upgrade disc.
3. Normal disc reading process is started. After finish toc read pro-
cess. The version are displayed on OSD..
OSD display (Example)
4. Select the desired ROM data using cursor
↑
,
↓
keys, then press
ENTER. Then the Flash Rom rewrite is entered. OSD will display
“Now Opdate”
OSD display (Example)
5. When rewrite is normally completed, OSD will off. (Screen become
black for a while).
6. Then logo will appear in OSD again as normal DVD start up pro-
cess.
7. Confirming the version
• A few moments after entering the DVD TEST Mode, “VD ******”
is displayed on the main unit.
(******: 6-digit numeric version code)
• To confirm the detailed version information, press the “1” key of
the remote control.
The system information is displayed on the OSD display.
(“********”: Version name) Check that the version name con-
forms to the write data.
8. Press the POWER button to exit the test mode
9. Enter to DVD TEST Mode again and press DISC5 button to initial-
ize the DVD software.
• The unit will Power on and off automatically and “COMPLETE”
will be displayed on the FL display after completed.
File system Browse
Directory:/
Please select a file
01/01
./
../
DVDXLG42K
.upd
Now Update...
Description of version name
Example: VER: DV50413B
From the left:
DV : DVD model
5 0 4 1 3 B : Version
*The format may be changed.