My objective to try other Loaders for the Bravo D1 was the following:
1. Can other loaders (Std. Computer IDE interface) work in the D1.
2. What is the comparative benchmark Electrical/mechanical characteristics of the Loaders.
3. Will a replacement Loader solve the D1 apparent "hang-ups".
The compatibility issue for all the formats which can be used on the D1 or the Mechanical Interface was NOT addressed.
The Loaders utilized are:
a. The original D1 is a Fuss Audio #DV9929B, F/W Rev. ?
b. LG Electronics (Hitachi) STDVD-ROM #GDR-8161B, F/W Rev. 0101, $40.
c. Sony DVD-ROM #DDU1621, F/W Rev. S3.3, $70.
d. Pioneer DVD-ROM #DVD-120S (Slot loader), F/W Rev. 1.01, $70.
e. Lite-On JLMS XJ-HD166S, F/W Rev. DS14, $42.
f. Toshiba DVD-ROM SD-1712, F/W Rev. 1004, $43.
A standard computer IDE Loader can be used in the D1 player, however the Loader must first be installed in a computer to set the DVD Region 1, or the Loader will not play anything but "All Region" DVD's.
The Loaders (including the Fuss Audio) were benchmark tested on an older 1GHz, Pentium III. The relevant test results are as follows:
_____________________Fuss Audio(D1)__LG Elect.__Sony____Pioneer_____Lite-On_____Toshiba
Max Transfer Rate:________1.79X_________8X______5.5X_____8.2X______7.8X__ ______4.2X
Random Seek Time:________560ms________117ms___110ms ___82ms______86ms_______----
1/3 stroke Seek Time:______820ms________111ms___103ms ___92ms______96ms_______----
Full stroke Seek Time:______1187ms_______180ms___167ms ___162ms_____211ms______----
Layer Change Time:________100ms________860ms___46ms_____79ms _____93ms_______100ms
The "real world" testing of the Loaders in the D1 was a challenge as I only have one DVD movie that would give about a 20% failure of the original D1. I did audition additional DVD's that I have had some problems with the original D1 (batch 1 &2) configuration.
I tested the Loaders in the D1 AND IN THE COMPUTER, to rule out a true Loader Failure.
At this point I must state that some of the start problems of my present D1 did clear up after cleaning the D1 (Fuss Audio) optics.
The following are the limited short testing results:Fuss Audio
: 5% lockup at start of (20% failure DVD) disk , 0% in computer. No additional failures.LG Elect.
: 80% lockup at start of (20% failure DVD) disk, 0% in computer. No additional failures.Sony
: 0% failures, D1 or computer. Will not load Firmware.Pioneer
: 0% lockup at start of (20% failure DVD) disk, however testing for Layer Change caused the D1 to skip to the next chapter(Brandon B. observed same with non Slot Loader), but at fast forward it DID NOT skip (other Loaders were fine). There were NO failures in the computer.Lite-On
: Tested @ later date, 5% lockup at start of (20% failure DVD) disk, 0% in computer. No additional failures. Unit can have Hi RPM noise. Will load Firmware.Toshiba
: Tested @ later date, 0% failures, D1 or computer. Will load Firmware. Most responsive to D1 processor (Loading, No CD, etc) commands.
One observation was that the time it would take to start a movie was significantly shorter with any of the new Loaders, because the search pattern for files prior to a DVD starting is influenced by the Seek Time (which is very high for the D1 Loader), assembling data prior to the start of the DVD. The thruput might also be a factor. A test of loading a disk with about 300jpeg images resulted in about 1/3 the load time with all the new Loaders.
Loader Power Requirements: the Fuss Audio requires 17 watts, while the other units required an average of 24 watts. This could be a problem as I did not go into the an analysis of the D1's Power Supply output capability. It obviously did provide the required power to conduct the testing, for the short term.
The Bottom Line: The Toshiba (loads Firmware) & Sony (Does not load Firmware) was the only Loader that did not seem to have a problem (with my limited testing) in the D1. Because there were NO failures when using the Computer with any Loaders, one could conclude that there may be a problem with COMPATIBILITY of the Loader (including the Fuss Audio) and the D1 processor or the Firmware.
Obviously this is just my opinion.