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[DVL-909] Converted to DVL-91 (DTS out): How to revert? https://forum.lddb.com/viewtopic.php?f=55&t=9719 |
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Author: | kikkoman [ 22 Mar 2021, 10:00 ] |
Post subject: | [DVL-909] Converted to DVL-91 (DTS out): How to revert? |
Hello there. I have a EU DVL-909 (originally Region 2 - PAL/NTSC on both laserdiscs and dvds). If i select MENU+INITIAL+DISPLAY i get the following: REGION:2 Ver: 1.210/8 AV1:3.31RAM Unit powers on in NTSC. No PAL laserdisc playback allowed. I guess this was modded back in the '90s to DVL-91 DTS-OUT + region free selectable + macrovision off. So it behaves like a DVL-91 elite series NTSC player. These were the mods info/guide: [EDIT] https://drive.google.com/file/d/1OC0dlO ... 4KuOv/view Now... the player is fine, but as you may know, it lost its PAL compatibility on the laserdiscs, which I'd like to regain for a number of reasons. Best of all, would be to finally mod the unit with a simple A/B switch in order to be able to choose to power it on as PAL DVL-909 or NTSC DVL-91 (best of both worlds). Unfortunately i have no info on how to revert the DTS hardware mod that was performed, because the original resistors that were removed are lost and i do not know what their values were. Only thing i know it's they were resistors R109 and R110. Can anyone point out a guide or just supply me with the info i need to achieve my goal? FIRMWARE MOD: i read around on the web, that there was also a possibility of updating the firmware on these LDV players in some way. I have found no info whatsoever on how to perform such firmware updates/upgrades. Would that be an easy fix or there would be a conflict between the hardware mod and the firmware? Thanks in advance! Long live the Laserdisc! |
Author: | cplusplus [ 22 Mar 2021, 15:32 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
Google Drive link is broken. R109 should measure 4.7k (US) and you need 20k (EU). R110 should measure 12k (US) and you need 27k (EU). Edit: Fixed values. |
Author: | kikkoman [ 22 Mar 2021, 16:53 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
In the guide "Modifica DTS" contained in the .rar file i linked above (link now fixed) it says: Replace R109 with a resistor of 4.7kohm. Replace R110 with a resistor of 12kohm. |
Author: | kikkoman [ 22 Mar 2021, 19:47 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
cplusplus wrote: The values above were pulled from the DVL-909 SM Does it say on the SM if it refers to the US model or EU model of the DVL-909 ?? Or one SM covers all versions?? |
Author: | cplusplus [ 22 Mar 2021, 21:09 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
In the table, RD/RA is listed as Region 1. WY is Region 2. |
Author: | kikkoman [ 22 Mar 2021, 22:22 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
cplusplus wrote: In the table, RD/RA is North America. WY is Europe. Wonderful! We are talking about a power rating of 0,25W (1/4W) resistors right? thanks! |
Author: | cplusplus [ 22 Mar 2021, 22:53 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
kikkoman wrote: We are talking about a power rating of 0,25W (1/4W) resistors right? I assume so. You can go higher but not lower. In regards to the 4.7k/12k I have confirmed that is what is from the factory on a DVL-91. Edited my above posts to prevent future confusion. |
Author: | kikkoman [ 23 Mar 2021, 00:45 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
cplusplus wrote: kikkoman wrote: In regards to the 4.7k/12k I have confirmed that is what is from the factory on a DVL-91. Edited my above posts to prevent future confusion. Great, thanks man! PS - I'd still like to find out about firmware flashing on the DVL-xxx series... |
Author: | cplusplus [ 23 Mar 2021, 17:43 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
kikkoman wrote: PS - I'd still like to find out about firmware flashing on the DVL-xxx series... Me too. Someone here posted that they knew how: DVL-919 DVDM board - FLASH SUM |
Author: | kikkoman [ 23 Mar 2021, 23:36 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
cplusplus wrote: kikkoman wrote: PS - I'd still like to find out about firmware flashing on the DVL-xxx series... Me too. Someone here posted that they knew how: DVL-919 DVDM board - FLASH SUM Yes, i noticed that, i hope we'll get an answer sooner or later. |
Author: | ldwrld [ 02 Apr 2021, 08:37 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
it's doable the question is why |
Author: | kikkoman [ 12 May 2021, 15:23 ] |
Post subject: | Re: DVL-909 CONVERTED TO DVL-91 (DTS OUT): HOW TO REVERT? |
ldwrld wrote: it's doable the question is why If you refer to the mod in general... the reason is... I need to regain PAL laserdisc playback. Ideal would be to install an A/B switch that would enable to turn the DTS mod ON and OFF. So a switch and both sets of resistors would be required in this case. If you refer to the flashing "approach", i was wondering if that would help go back to a "pre-mod status" w/out having to do a hardware mod, resistors, soldering iron etc. |
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