"lately it has been giving me lots of problems" -- define problems please. Are you having problems with the burn quality of disc types that previously worked fine? Errors burning new disc types? Problems reading back copies?
Generally, the most common case in which new firmware will help is if you are trying to use newer media than the drive can handle; ie. if the drive only has a media descriptor for TYG02 discs but you are trying to burn TYG03 discs. If TYG03 didn't exist when the drive was manufactured, the drive may not be able to burn this disc at all or may burn with a suboptimal strategy unless you upgrade the firmware. However, other problems may be a dirty or dying laser, and no amount of firmware flashing will help.
Typically, standalone duplicators like the one you have use standard consumer DVD-ROM and DVDÂ±RW drives, so you should be able to remove the drive and upgrade it like any normal PC drive; this may void the manufacturer's warranty on the duplicator, however.
If you do decide to upgrade the firmware, you should not have problems with the following:
Step 1: Remove the DRW-1604P drive from the standalone duplicator
Step 2: Connect the DRW-1604P drive to your computer
Step 3: Test that the drive reads and writes correctly.
Step 4: Post the current version number of the drive's firmware here.
Step 5: Download and flash new firmware for your drive. The latest version is 1.18, available here:
DRW-1604P(-D) Firmware V1.18
1.Add and modify write quality for some 8X DVD media.
2.Improve 16X DVD media for 16x recording quality.
Step 6: Re-test the drive in your PC and make sure it still works.
Step 7: Reinstall the drive in your standalone duplicator.
Step 8: Let us know the results
Hope this helps.