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Humax 9200T/S - Has anyone else seen minor lines going down the TV screen?
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PhilipL
16-12-2007
Hi

Quote:
“Which models? I have a 540 which I bought in Summer 2006.”

Yes, the 540 and newer models. Pioneer have been making little if any money on DVD Recorders so outsourced the components/design with these newer models. Prior models were very much designed and built by Pioneer using their own system chips, newer models use the NEC chips.

Quote:
“I've not actually tried "RGB loop through" but I'd imagine with it in standby it would either be converted to Composite or look the same as it does when sent directly to my TV. As you say no processing is done when in standby.”

In standby the Pioneer does nothing with the signal and the 2 SCART sockets are connected straight through, so it should be the same as connecting the Humax direct to the TV, expect for an extra journey through the second SCART lead.

Quote:
“Does this also apply for Aerial in to internal Freeview Tuner then outputted via Component? Because that looks identical to the Humax in then out again as previously described.”

The Pioneer has a Freeview tuner living on a separate circuit board, basically it's like any stand alone Freeview box with the box removed and the board put inside the recorder. It has some data connections so it can be controlled by the recorder, and sends the picture by S-Video. A clue to it's separate origin is the Freeview tuners setup menu, notice it doesn't match the main menus and the menu system isn't as sharp? This is because the menu is from the Freeview tuner connected by S-Video, whereas the main recorder menus are generated by the recorder itself and added to the outputs directly.

So the digital signal from the aerial enters the Freeview tuner that tunes into the channel and then sends the video by S-Video link to the recorder itself. The recorder than has an output video encoder that converts that S-Video into RGB, Composite and Component so you can watch it live from the outputs.

When you record, the S-Video signal is digitalised and compressed to MPEG2 and recorded onto the disc.

It's the input that is S-Video as it's best connection, not the output. So when you play a commercial DVD, that digital information is converted directly to RGB or S-Video or Component like any other DVD player, so the quality is as you would expect. However when recording or watching live via Freeview the Pioneer is like having a separate Freeview box connected by S-Video, except of course there are data connections internally allowing the recorder to tune to the correct channel on a timer recorder and allowing the remote control to control both.

The Humax on the other hand works completely differently, it records the Freeview digital data completely unchanged, so when you play it back it is identical to how it would have been live, hence the better picture quality as it's the digital signal converted straight to RGB whether watching live or a recording.

Quote:
“Because that looks identical to the Humax in then out again as previously described.”

Yes, as it is being down converted to S-Video then converted to component so it matches the internal Freeview box for quality as that is also S-Video then converted to component.

Quote:
“Phil: If the Pioneer Recorders converts RGB into S-Video then why is there an option in the menus to choose Composite, S-Video or RGB from the Input Scart? To appease people who would moan if RGB was missing?”

Yes, it just allows people to connect what they like.

Quote:
“I've tried what you suggested and it seems oddly the Pioneer 540 doesn't offer scart loop-through period, in Composite or RGB. With the Pioneer in Standby and the Humax 9200 plugged into it's input scart and a Scart plugged into the Pioneer's output scart I get nothing at all.”

You need to check the standby power options in the Pioneer's setup menu, as you can turn this feature off to save power on standby (as to connect them through in standby it needs to keep some relays powered on) and I suspect that option is selected. Disable power saving in standby and have another go.

Regards

Phil
gtg
16-12-2007
Originally Posted by bradavon:
“This is my Main Scart cable:

http://www.lektropacks.com/view_prod...hp?product=239

My other scart cable I mentioned previously is from Cambridge Audio (picture on page 1). I have tested both Scart cables with my Humax 9200 and neither get rid of the lines. I've e-mailed Lektropacks to confirm the scart I have is "individually screened".”

Just to give you an idea of what we're up against regarding scart cable quality, Maplin list 4 types, only one of which is suitable for a connection using RGB.

http://www.maplin.co.uk/search.aspx?...nu=y&doy=16m12
bradavon
16-12-2007
Originally Posted by PhilipL:
“Pioneer have been making little if any money on DVD Recorders so outsourced the components/design with these newer models. Prior models were very much designed and built by Pioneer using their own system chips, newer models use the NEC chips.”

Firstly thanks

I paid £370 for my 540 (a good price at the time) and the 550 is £290 I'm confident Pioneer is making a decent profit on these.

Ironically you say Pioneer now source lots of their parts from elsewhere. Sony then buy Pioneer's Recorders and pretty much just rebrand them (even the Firmware has Pioneer all over it).

Originally Posted by PhilipL:
“A clue to it's separate origin is the Freeview tuners setup menu, notice it doesn't match the main menus and the menu system isn't as sharp?”

Definitely. The Freeview EPG is functional but very basic. The Humax 9200 EPG is insignificantly better. Pioneer really needed to upgrade this!

Originally Posted by PhilipL:
“This is because the menu is from the Freeview tuner connected by S-Video”

It will be interesting to see how my Humax 9200 compares when connected by S-Video. As neither of my Samsung LCD TV's Scart sockets support S-Video I've ordered a cheap S-Video to Scart cable to test it.

That seems like a lot of extra programming just so the signal isn't kept in RGB.

Originally Posted by PhilipL:
“The Humax on the other hand works completely differently, it records the Freeview digital data completely unchanged, so when you play it back it is identical to how it would have been live, hence the better picture quality as it's the digital signal converted straight to RGB whether watching live or a recording.”

Except in my case I've got lines on the picture . I'm now thinking it's a faulty Scart port (or something connected) causing too much power to be outputted when in RGB mode which affect how much TV handles it, whereas other TVs can cope.

Regardless I hope Humax Tech Support reply soon so I can get into a conversation with them. After seeing what they recommend I may ask for a replacement as at least then I'd know.

Originally Posted by PhilipL:
“You need to check the standby power options in the Pioneer's setup menu, as you can turn this feature off to save power on standby (as to connect them through in standby it needs to keep some relays powered on) and I suspect that option is selected. Disable power saving in standby and have another go.”

Good point. I'll check them.

Thanks again.
bradavon
16-12-2007
Originally Posted by gtg:
“Just to give you an idea of what we're up against regarding scart cable quality, Maplin list 4 types, only one of which is suitable for a connection using RGB.

http://www.maplin.co.uk/search.aspx?...nu=y&doy=16m12”

That is indeed annoying.

In reality I find a cheap cable is often fine BUT as soon as there is a problem it falls to bits. Then again mostly there isn't. I'd never risk cheap Scart cables but many do just fine.

I know for a fact my decent cables are doing a better job than the cheap cables as the lines get much, much worse using one.
PhilipL
16-12-2007
Hi

Quote:
“I paid £370 for my 540 (a good price at the time) and the 550 is £290 I'm confident Pioneer is making a decent profit on these.”

The link is here: http://www.forbes.com/markets/feeds/...fx2791621.html

Although they mention a tie in with Panasonic it turns out they went to an NEC platform.

Pioneer has been making some big losses this last couple of years, a lot of which is down to poor DVD Recorder sales.

Regards

Phil
bradavon
17-12-2007
Originally Posted by PhilipL:
“Pioneer has been making some big losses this last couple of years, a lot of which is down to poor DVD Recorder sales.”

They aren't helping themselves by marking the price of the Pioneer way more than the Sony or Panasonic Recorders. The AV Forums is full of threads of people buying Sony and Panasonic models but virtually none from Pioneer.

The other reason is most either want a cheap PVR or cheap DVD Recorder only unit but for those who want HDD/DVDR machines Pioneer are simply too expensive. Especially when the difference between the Pioneer 550 and Sony 870 is virtually non-existent (full DVD-RAM support on the Pioneer is about it, but Pioneer charge nearly £100 more).

That would be ironic if it was Panasonic considering Sony's source their Recorders from Pioneer. If Pioneer then sourced them from Panasonic it would literally be Panasonic supplying the three.

That article says Pioneer are the fourth biggest, who're the other three? Panasonic, Sony and? Philips maybe. Toshiba and Samsung are too small in the market.

Thanks again.
bradavon
17-12-2007
OH MY GOD!

I turned off the Pioneer 540's power management as Phil explained to enable me to loop-through my Humax 9200 RGB Scart signal to my TV and the lines have gone away.

So in short a direct RGB feed to my TV "specifically" from the Humax 9200 gives me lines but when fed through my Pioneer 540 in Standby no lines. If I'm being picky I can still possibly see minute (and I mean minute) lines BUT these could very well just be the usual Freeview artefacting. I'm inclined to believe they are.

If I look at the Info bar before there were lines, now there isn't. I find that a quick way to tell, as it has a clear blue bar to look at.

I am considering it partially fixed. I say partially as it's no good being left this way. I cannot watch my Humax 9200 when the Pioneer 540 is on, such as recording.

Any ideas what is going on here? Is the Pioneer 540 dampening the power somehow?
bradavon
17-12-2007
Originally Posted by bradavon:
“If I'm being picky I can still possibly see minute (and I mean minute) lines BUT these could very well just be the usual Freeview artefacting. I'm inclined to believe they are.”

I'm amending this statement as after further watching it's wrong, but as I'm too late to edit my post I'll post it below instead:

"If I'm being picky I can still possibly see minute (and I mean minute) lines BUT you really have to be looking to see them."

The bit about Freeview artefacting irrelevant.
gadgetmind
17-12-2007
Originally Posted by bradavon:
“In reality I find a cheap cable is often fine BUT as soon as there is a problem it falls to bits. Then again mostly there isn't. I'd never risk cheap Scart cables but many do just fine.”

CPCs flat scarts are well screened, used 75ohm coax, and feel very well made. And they are only around a fiver!

Ian
gadgetmind
17-12-2007
Originally Posted by bradavon:
“OH MY GOD!

Any ideas what is going on here? Is the Pioneer 540 dampening the power somehow?”

Do you only get the lines in bright areas of the picture? It could be the Humax is driving the RGB lines a little "aggressively" for your TV - there have been reports of it over-volting control lines in the past and I have seen 6V on blanking which is supposed to be around 1.5V !!! The TV input could be going into over-shoot. I guess you've fiddled with brightness?

You could sacrifice a cheapy SCART cable and fit various resistor networks into the RGB lines. There are ways to do this while still maintaining the correct impedance. Let me rummage for a while ...

Ian
bradavon
17-12-2007
Originally Posted by gadgetmind:
“CPCs flat scarts are well screened, used 75ohm coax, and feel very well made. And they are only around a fiver!”

I already have decent scart cables

What is 75 ohm?

Originally Posted by gadgetmind:
“Do you only get the lines in bright areas of the picture?”

No, right across the picture. The picture is pretty bright most of the time.

Originally Posted by gadgetmind:
“It could be the Humax is driving the RGB lines a little "aggressively" for your TV”

Can you buy Scart dampeners or something like that?

Originally Posted by gadgetmind:
“I guess you've fiddled with brightness?”

Yes but then it's too dark. I like the settings my TV is setup to I don't want to change them.

Originally Posted by gadgetmind:
“You could sacrifice a cheapy SCART cable and fit various resistor networks into the RGB lines. There are ways to do this while still maintaining the correct impedance. Let me rummage for a while ...”

I'm using a proper scart cable in fact here is what the manufacturer says on one of my scart cables:

"The HCSL14 is both individually and fully screened."

But please rummage for "resistor networks into the RGB lines". I've no idea what that means though
PhilipL
17-12-2007
Hi

Quote:
“I am considering it partially fixed. I say partially as it's no good being left this way. I cannot watch my Humax 9200 when the Pioneer 540 is on, such as recording.

Any ideas what is going on here? Is the Pioneer 540 dampening the power somehow?”

Forget problems with cables, it has nothing to do with the SCART cable.

I suspect the Humax has some DC component on the outputs and the Samsung TV isn't doing anything to protect against it. The DC component is then causing a problem when the Samsung TV converts the signal internally, probably at the analogue to digital conversion stage.

When you go through the Pioneer it isn't reprocessing the RGB signal (when it is off), but it will be travelling through some capacitors, which are there to remove DV voltage and protect against it, so it stops the problem from happening.

You can record on the Pioneer and watch the Humax through the SCARTs by pressing the '+' button behind the flap when recording.

You may also find a SCART switching box will also do the same thing as looping through the Pioneer, worth a try, if you get from Argos you can always take it back if it doesn't resolve. You would need to go for an active type rather than one you manually switch to get the fix I would have thought.

Regards

Phil
bradavon
17-12-2007
Originally Posted by PhilipL:
“You can record on the Pioneer and watch the Humax through the SCARTs by pressing the '+' button behind the flap when recording.”

Oh yes, how weird. It's weird this works on the unit itself but the same buttons on the remote give you the expected error that you cannot turn the channel over when recording.

I wonder why they programmed them differently. It's a bit annoying though as turning my Recorder on now reverts it to a dodgy Composite picture from the Scart connection and I have to press the TVs source button to switch to Component. When I press + then - to go back to the Recorder it also chooses the dodgy Scart picture and not Component.

It works but it's a messy workaround to something the Humax 9200 shouldn't be doing in the first place.

Originally Posted by PhilipL:
“You may also find a SCART switching box will also do the same thing as looping through the Pioneer, worth a try, if you get from Argos you can always take it back if it doesn't resolve. You would need to go for an active type rather than one you manually switch to get the fix I would have thought.”

Do you mean one like this without the switches? -

http://www.argos.co.uk/static/Produc...xt%3ESCART.htm

All the ones at Argos are manual ones . Now I think about it my Dad has one that may do the job. I wouldn't really want to use it though as the cables on switch boxes tend to be cheap negating the whole point of a decent scart cable (generally speaking) but it is worth testing.

I've left it plugged into my Recorder today and after further testing the lines are still there but as I previously explained they're so minute I don't consider it a problem. You have to be looking for them.

Thanks again Phil. You've been very helpful.
gadgetmind
17-12-2007
Originally Posted by PhilipL:
“I suspect the Humax has some DC component on the outputs”

Umm, aren't composite and RGB all DC signals? Surely none of them should ever swing negative? A/C coupling them won't therefore work.

Ian
gadgetmind
17-12-2007
Originally Posted by bradavon:
“Can you buy Scart dampeners or something like that?”

No, because you shouldn't need them! And the fact that you get lines right across suggests that I was wrong regards over-shoot.

Quote:
“But please rummage for "resistor networks into the RGB lines". I've no idea what that means though ”

But I need a good theory first!

Ian
nvingo
17-12-2007
Just spotted this on hummy.org
Quote:
“New Humax 9200TB user here, same problem with the picture flicker on a Philips 42PFL5522D. No problems with any other equipment.

I was about to return the unit, but called Humax and Philips, both said neither product was at fault, I asked a mate on works on TV's to have a look and he said the sync signal on the Humax was 'outside of range'.

He soldered a 330ohm resistor in series inside the SCART cable on pin 20 and it has solved the issue totally, no more flicker!”

PhilipL
17-12-2007
Hi

Quote:
“Oh yes, how weird. It's weird this works on the unit itself but the same buttons on the remote give you the expected error that you cannot turn the channel over when recording.”

It's always been like this from their very first DVD Recorder, seems daft not to have the option on the remote control I know.

Quote:
“All the ones at Argos are manual ones . Now I think about it my Dad has one that may do the job. I wouldn't really want to use it though as the cables on switch boxes tend to be cheap negating the whole point of a decent scart cable (generally speaking) but it is worth testing.”

I would think the manual ones are just switches with no electronics, so wouldn't be much use.

Good luck.

Regards

Phil
bradavon
18-12-2007
Originally Posted by nvingo:
“Just spotted this on hummy.org”

Thanks Nvingo.

I don't have that flicker problem but maybe the solution is the same. Any idea how or who I can ask to fix it?

Originally Posted by PhilipL:
“It's always been like this from their very first DVD Recorder, seems daft not to have the option on the remote control I know.”

It would help. It would be a pain to get up to switch devices.

Originally Posted by PhilipL:
“I would think the manual ones are just switches with no electronics, so wouldn't be much use.”

Thanks again.

Do you mean one with it's own power source?

I have my Dad's now and it has no manual button but no power source either. It relies on one device being turned off, otherwise a mishmash of pictures of shown. Obviously that's not relevant in my case as I'll only be plugging one thing into it.

I've started a thread over at Hummy.org.uk too:

http://www.hummy.org.uk/invison/inde...showtopic=7990

So far Humax haven't replied to my e-mails . I e-mailed them again today asking for a response and saying what we discovered about watching it through the Recorder. I am definitely inclined to get Humax to fix mine or replace it as I don't know with 100% assurance mine isn't faulty.
bradavon
18-12-2007
I've borrowed from my Dad a 5 to 1 Scart switch box. No matter which way I plug it in if I put the Scart cable from the Humax 9200 into it then on to my TV the picture gets significantly worse with an enormous amount of grain/noise.

This switch box has no power source of it's own or any manual buttons. It is only a cheap one too, but it doesn't bode well.

Interestingly it looks exactly the same if I use the cable supplied with the Humax 9200 when plugged directly to my TV.

Which scart switcher at Argos "could" do the job? Thanks.
nvingo
18-12-2007
I put that in for gadgetminds information as it seems he was going to great lengths, whilst his suggestion of the possible cause seems to match that.
bradavon
18-12-2007
Thanks anyway.
gtg
18-12-2007
Quote:
“All the ones at Argos are manual ones”

http://www.argos.co.uk/static/Produc...xt%3ESCART.htm

I tried this for a while but returned it as it upped the switching voltage on pin8 above the point where my crappy old TV could understand it, so I know it re-drives pin8 & it supports RGB on 2 of it's inputs - maybe worth a go....
gadgetmind
18-12-2007
Originally Posted by nvingo:
“I put that in for gadgetminds information as it seems he was going to great lengths, whilst his suggestion of the possible cause seems to match that.”

I actually had a similar issue with my Samsung TV (LE26R74BDX) but with a DVD player and going via a SCART switch. On very white scenes, the picture would flick or even start rolling.

I ended up putting a 75ohm series resistor into the composite line and this fixed it.

Of course, when using RGB, the composite line is just used for sync and not chroma/luma, so I'm not sure how it could cause these lines. This is why I asked whether the problem just happened on very bright areas and suggested maybe some resistors on the RGB lines.

Ian
bradavon
18-12-2007
Can you buy Scarts with these already on? I'm not technical enough to do it myself.

Thanks
gadgetmind
18-12-2007
Originally Posted by bradavon:
“Can you buy Scarts with these already on? I'm not technical enough to do it myself.”

No, sorry, this is all home-brew bodging stuff!

Ian
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