Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download
Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing.
If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
DVDR3440H Firmware Upgrade
Firmware Upgrade
We have developed a firmware upgrade to improve your product.
This upgrade is applicable for the following model:
DVDR3440H
Note: Before you proceed to upgrade, please be reminded that you need to do configuration again
each time after firmware upgrade!
Upgrade Procedure
Step 1 Check your current version
First check your current firmware version to see if you need to upgrade:
1. Press to bring up the Setup Menu, then press <3>, <2>, <1>,