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Poor man's SDI - Page 21  

post #601 of 744
mwpmo,

Thanks. That's what I thought it looked like, but I wasn't sure.

Greg Stitt
post #602 of 744
Please take a look here;

http://www.dvdupgrades.ch/150002/Mod...put_board.html

It semms as the Bt601 chip are know accesible for SDI DIY boards.

I have ask them about a good DVB T set top box to be SDI modified.

They have also drop their prices a lot!!!

Happy reading.

Nacho.
post #603 of 744
Well.............I´m trying to make the SDI out from a Humax F1 4000T DVB T, (it has a Philips SAA7215HS chip inside) with the pmsvideo board.

What I get is something like the image in a green back, I can see the people "siloute" but in a green image with distortion. I have used pins 126 (CLK), 128, 131-137 (DATA). http://www.semiconductors.philips.co...6_7221_N_3.pdf

When the ground connection is better the image is a little more clear, so may be the solution is ground related.

Any idea in how to solve this little issue?

Nacho.
post #604 of 744
Well,all problems i had were always related to noisy sync
signal.
As a suggestion:
-twist the ground line and sync
-connect to ground both sides of the ground line
-put a 100ohm resistor in series on sync
-put a 27-47pf cap from sync to ground.

Recheck all connections

Good luck
Mauro
post #605 of 744
I bought this Denon unit hoping I could mod it. After opening it up, it does have the same Panasonic decoder chip as the 1600, but on a different pcb. Any guidance on how to identify connection points for the mod? Any help would be greatly appreciated!!!
post #606 of 744
I bought a SDI modded RP82 from PMS Video..

I have major problems using SDI into the Holo II - I get streaks, green flashes and major flicker..

I taped the wires (as suggested by PMS) some more inside the player, but nothing changed..


I tried different cables using BNC adapters, then ordered a new cable with BNC - BNC on the ends..

I got the new BNC-BNC cable..

It's not the problem

I have tried everything such as moving the player and different power outlets and problems remain..

Today I tried a friend's SDI Panny RP82 using my cables and in the same place in the rack and his player is fine

Not a single glitch anywhere..

This means it's the mod in my player..

Can anyone think of anything I could try with my player before I go and ship it back to PMS in Hong Kong?
post #607 of 744
Have you check all the wires and the connections inside the RP82?
(If any of them is broken, there will not have output)

Also when it power up, is the LED2 on the Mod board ON?
(If the mod board is receiving power and the clock signal, it will turn on)

Have the clock signal cable twist with the ground wire to reduce the noise in the clock signal?
post #608 of 744
Quote:
Originally posted by mwpmo
Have you check all the wires and the connections inside the RP82?
(If any of them is broken, there will not have output)
I cannot see any broken or loose wires..

I do get a SDI image and it's very good except for the glitches..I can go sometimes 5 minutes with no sign of any problems but then the streaks start

Problem seems to get worse as I use the player..

Quote:

Also when it power up, is the LED2 on the Mod board ON?
(If the mod board is receiving power and the clock signal, it will turn on)

Yes there is one red LED on inside

Quote:
Have the clock signal cable twist with the ground wire to reduce the noise in the clock signal? [/b]
I have a red and black wire that are twisted together

The others wires are much thinner (5 purple and 1 yellow) -these are not twisted together..

Thanks
post #609 of 744
Bad soldering,
I bet.

Mauro
post #610 of 744
Bump

Could one of the experts give me some help here? I need help to identify where to tap in to the Panasonic demod chip.

At this point I am willing to send it to someone if they can do the mod, please let me know.

Thanks!!!!
post #611 of 744
Deepsky4565,

identify the video encoder chip, find it's datasheet and you have found the datalines and clk. Then you could try trace back the lines to the panasonic chip.
This how I did it.

regards,

Roberto
post #612 of 744
Thanks Roberto.

I think the video encoder chip is the Genesis gmVLX1A-X.

I cannot find a datasheet for this chip. Can anyone help me out on this? Thank you.
post #613 of 744
The Genesis gmVLX1A-X is a de-interlacer. Possible you have two videopathsl 1) interlaced, 2) non-interlaced
This could mean you have two video encoders chips on it. I would look for analog device or cirrus logics chips. These are popular video encoders brands.
post #614 of 744
The encoder must be a ADV 7190. It has 16 data lines instead of 8. Does this make it unsuitable?

Thanks again.
post #615 of 744
Even if it has 16 lines,only 8 are used.
Normally do-d7,the remaining 8 are grounded.
Mauro
post #616 of 744
Quote:
Originally posted by Plexi47
Well,all problems i had were always related to noisy sync
signal.
As a suggestion:
-twist the ground line and sync
-connect to ground both sides of the ground line
-put a 100ohm resistor in series on sync
-put a 27-47pf cap from sync to ground.

Recheck all connections

Good luck
Mauro
I have do it, it doesn´t work for me.

If I make contact ground-sync the images changes and sometimes I get a good image but not "centered" in the screen, or with bad colours.

I know I´m near the solution, but I don´t know electronics.

Help!!!!!

Nacho.
post #617 of 744
Hi Nacho,
That worked for me in an Denon 2900,
with pana RA82 :no resistor,no cap.
Forgot to say that the resistor must be before the cap so.

Sync line from player --- resistor---cap to ground----SDI module(Sync)

Putting the cap before resistor it did not work.

Mauro
post #618 of 744
Do you know if exist any kind of pre-build noise filter for that matter?

Nacho.
post #619 of 744
Quote:
Originally posted by nachin
Do you know if exist any kind of pre-build noise filter for that matter?

Nacho.
I don't think it exists
Mauro
post #620 of 744
In other forums talk me about "jitter";

http://www.elektroda.pl/eboard/sutra252757.html#252757

Is that possible?

Nacho.
post #621 of 744
Any one working on a mega changer?

I know the old Pio is listed and there are rumors of a Kenwood mod but what

I'm really hopping for is that some one is attempting an SDI mod on one of the 400+ disk SONYs.
post #622 of 744
Progress on the Denon DVM-4800. I've now got a very detailed picture, but the horizontal sync is way off, there's a big green stripe down the screen, and there are dark streaks across the screen too. How do you tweak this out?

Thanks!!!
post #623 of 744
Quote:
Originally posted by Deepsky4565
Progress on the Denon DVM-4800. I've now got a very detailed picture, but the horizontal sync is way off, there's a big green stripe down the screen, and there are dark streaks across the screen too. How do you tweak this out?

Thanks!!!
Try the mod on the sync line I suggested to Nachin,
it worked for me on an Denon 2900.
If it does't work it cannot anyhow hurt .
Mauro
post #624 of 744
Quote:
Originally posted by John the Depot Dude
I bought a SDI modded RP82 from PMS Video..

I have major problems using SDI into the Holo II - I get streaks, green flashes and major flicker..


Problem solved!!!!

I had the clock wire replaced with a much thicker sheilded co-axial cable

This did the trick....Everything is fine - no more glitches of any kind..

Attached is a picture of the black coax wire..

:) :) :)
post #625 of 744
Picture did not uplaod..


Trying again.
LL
post #626 of 744
DVM-4800 problem still here. Did the resistor and capacitor filter on the clock wire, no change. Is it possible this player needs the ultimate mod with the insertion of horizontal data? As I said before, it looks like the horizontal sync is off by about 30%. Any help please?

Thanks.
post #627 of 744
My horizontal sync was off too..just one green vertical line where the image was split..

I'm using the Holo II card and was able to correct it within the Holo app..from memory the setting had to go up to 71 or thereabouts..
post #628 of 744
John,

thanks, that did the trick. I now have it working! Looks pretty good, but need to set some other settings on this input. I nearly gave up a few times. I'll see if my photos are clear enough to post. At least I can now confirm that the Denon DVM-4800 is possible, similar to the 1600.

Thanks again!
post #629 of 744
I have a 5 disc carousel Panny CV-51 interlaced player. Great player when used with an iScan Pro and my AE100 LCD PJ. I plan to upgrade in the near future to an L300 PJ or AE500 PJ using either my iScan Pro, an Ultra, or if I suddenly win some money, the iScan HD.

Could I possibly do this SDI mod to this player? What can I connect the player to afterwards? I have an iScan Pro. Could I connect via SDI to another line doubler? iScan Ultra? I know you can connect to the HD with SDI but some have said I can't connect via SDI to the iScan Ultra.
post #630 of 744
I have follow the Mauro (Plexi47) advices, recheked soldering and "sometimes" I get correct images, but............

After a few seconds the sat receiver DVB-S stops the images saying it doesn´t receive signal, the same for the DVB-T receiver, both use the Philips SAA7215 chip and of course different tuner.

Any Idea to solve the issue? I´m near the solution, well, again :D

Nacho.
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