DVX555U Pixelating

**navy blue** · 04-07-08, 03:23 PM

Hi

Just bought one of these devices, whacked in a HDD, works fine , except for all the ABC channels are pixealting, stop, starting jittering etc. Only ABC channels, anyone k now what I may be able to do this resolve this.

Have another SD st box and all channels work finee and so does the HD tuner in one of my TV's, problem is just this DVDX555U.

Many Thanks,

NB

**Colin 2905** · 04-07-08, 06:18 PM

If you unwhack the HDD, is ABC OK then?

**Fernbay** · 04-07-08, 07:28 PM

Digital interferance on ABC?

2 channels, analog or digital can not live in the same space

If (for example) your ABC is in CH37UHF, and you have a VCR or Sat box etc with a modulator, and it outputs on 36, 37 or 38, and that modulator loops through to your DVX555U, then you would get digital breakup.....

**navy blue** · 04-07-08, 09:55 PM

Quote:

Originally Posted by Colin 2905

If you unwhack the HDD, is ABC OK then?

Colin

U r on the money, works fine when HDD out. Any reason why this would be happening?

Cheers

**Fernbay** · 04-07-08, 10:49 PM

Quote:

Originally Posted by navy blue

Colin

U r on the money, works fine when HDD out. Any reason why this would be happening?

Cheers

Shitty caps...

Ya gotta keep 'em regulated

**navy blue** · 04-07-08, 10:56 PM

Quote:

Originally Posted by Fernbay

Shitty caps...

Ya gotta keep 'em regulated

Excuse my ignorance, caps on the board/tuner? Replacing it fix it?
Also noticed when it is on, it emits a whistling/hissing noise. Would this be the caps?

Cheers

**Fernbay** · 04-07-08, 11:03 PM

Electrolytics..

Like car batteries go crook.....
The plates buckle & touch the plates next to them

It gets worse after that

**navy blue** · 04-07-08, 11:17 PM

Quote:

Originally Posted by Fernbay

Electrolytics..

Like car batteries go crook.....
The plates buckle & touch the plates next to them

It gets worse after that

SO wot u say above is what is making the noise? Causing ABC pixelating issues? Or both? Why does ABC only pixelate with HDD connected?

Cheers

**Fernbay** · 04-07-08, 11:23 PM

The ripple hits a harmonic that causes the inductive reactance to throw the circuit design specs out the window

**big mick000** · 04-07-08, 11:24 PM

Maybe the extra electrical noise freaks out that particular channel? On my PVR's, the very slight whistline/humming noise is the HDD spinning.

**navy blue** · 04-07-08, 11:28 PM

Quote:

Originally Posted by big mick000

Maybe the extra electrical noise freaks out that particular channel? On my PVR's, the very slight whistline/humming noise is the HDD spinning.

Mick

It is whistling without the HDD in.

Fernbay

Maybe I have had too much to drink tonight, but you are miles ahead of me in the lingo, im confused

**Fernbay** · 04-07-08, 11:38 PM

**** Winks & yanks chain

Quote:

Originally Posted by navy blue

Fernbay

Maybe I have had too much to drink tonight, but you are miles ahead of me in the lingo, im confused

Still serious tho..
Change the caps

**navy blue** · 04-07-08, 11:50 PM

Quote:

Originally Posted by Fernbay

**** Winks & yanks chain

Still serious tho..
Change the caps

Change the caps? No way, its going back to get a replacement !!!

**porkop** · 05-07-08, 09:01 AM

just change the HDD to another model/make to determine if it is the HDD/STB first! I have a 555 with an 80g hdd, never had an issue.

**jok11n** · 05-07-08, 10:01 AM

Quote:

Originally Posted by porkop

just change the HDD to another model/make to determine if it is the HDD/STB first! I have a 555 with an 80g hdd, never had an issue.

Agree, some hard drives can cause this problem

**navy blue** · 06-07-08, 10:54 PM

Thanks guys will do so. But the "whistling" noise is this common on this model? Is it faulty?

Cheers

**Antennaman** · 07-07-08, 07:50 AM

Fernbay's on the money.

It is a power supply issue, the hard drive is loading it more and causing spurious effects. The ABC problem could be caused by the generation of interfering signals arising from plugging the hard drive in, which is why another hard drive may work fine.

There is something to be said for getting an off the shelf item, although even these can be plagued with there own idiosyncracies.

The whistling is most likely coming from the power supply, they normally operate in the inaudible range unless overloaded or faulty.

There again, it might be tinnitus - it can get worse after a few drinks.

**morroman** · 08-07-08, 06:48 PM

I personally dont have any problem with ABC and pixelation but the stock batteries for the remote leaked acid all over the remote and now it doesnt work

Now the unit is useless, anyone know how to fix remotes???

**framtech** · 12-07-08, 08:25 PM

hiya

has the acid leaked on the circuit board. the company i used to work for use pcb cleaner to remove stuff like that even from terminals

rgds
jmaes

**navy blue** · 13-07-08, 03:08 PM

Took it back, and got another, havent tested a HDD in it yet, the whistling noise is also evident in the replacement but nowhere to the extent the first on was. Can only hear it if u put the ear to it and no sounds around u.

04-07-08, 03:23 PM	#1 (permalink)
navy blue Senior Member iTrader: (0) Join Date: Jan 2008 Posts: 223 Spent time on board: 10:58:21	DVX555U Pixelating Hi Just bought one of these devices, whacked in a HDD, works fine , except for all the ABC channels are pixealting, stop, starting jittering etc. Only ABC channels, anyone k now what I may be able to do this resolve this. Have another SD st box and all channels work finee and so does the HD tuner in one of my TV's, problem is just this DVDX555U. Many Thanks, NB

04-07-08, 07:28 PM	#3 (permalink)
Fernbay Super Moderator iTrader: (30) Join Date: Jan 2008 Location: Newcastle Posts: 847 Spent time on board: 1 Month, 2 Weeks, 1 Day and 15:12:51	Digital interferance on ABC? 2 channels, analog or digital can not live in the same space If (for example) your ABC is in CH37UHF, and you have a VCR or Sat box etc with a modulator, and it outputs on 36, 37 or 38, and that modulator loops through to your DVX555U, then you would get digital breakup..... __________________ FS:- DM7020 - $525 DM500S $170 , DM500 2A PSU, $25ea... DM500 mobo - $130 - Free domestic express post PM for details

04-07-08, 11:03 PM	#7 (permalink)
Fernbay Super Moderator iTrader: (30) Join Date: Jan 2008 Location: Newcastle Posts: 847 Spent time on board: 1 Month, 2 Weeks, 1 Day and 15:12:51	Electrolytics.. Like car batteries go crook..... The plates buckle & touch the plates next to them It gets worse after that __________________ FS:- DM7020 - $525 DM500S $170 , DM500 2A PSU, $25ea... DM500 mobo - $130 - Free domestic express post PM for details

04-07-08, 11:23 PM	#9 (permalink)
Fernbay Super Moderator iTrader: (30) Join Date: Jan 2008 Location: Newcastle Posts: 847 Spent time on board: 1 Month, 2 Weeks, 1 Day and 15:12:51	The ripple hits a harmonic that causes the inductive reactance to throw the circuit design specs out the window __________________ FS:- DM7020 - $525 DM500S $170 , DM500 2A PSU, $25ea... DM500 mobo - $130 - Free domestic express post PM for details

04-07-08, 11:24 PM	#10 (permalink)
big mick000 Senior Member iTrader: (1) Join Date: Jan 2008 Posts: 439	Maybe the extra electrical noise freaks out that particular channel? On my PVR's, the very slight whistline/humming noise is the HDD spinning. __________________ caps lock... UNLEASH THE FURY!! Want Aurora? eaglesats@gmail.com http://www.freewebs.com/eaglesats/

04-07-08, 06:18 PM	#2 (permalink)
Colin 2905 Member iTrader: (0) Join Date: Jan 2008 Posts: 96 Spent time on board: 3 Days and 2:49:05	If you unwhack the HDD, is ABC OK then?

05-07-08, 09:01 AM	#14 (permalink)
porkop Premium Member iTrader: (2) Join Date: Jan 2008 Posts: 447	just change the HDD to another model/make to determine if it is the HDD/STB first! I have a 555 with an 80g hdd, never had an issue.

06-07-08, 10:54 PM	#16 (permalink)
navy blue Senior Member iTrader: (0) Join Date: Jan 2008 Posts: 223 Spent time on board: 10:58:21	Thanks guys will do so. But the "whistling" noise is this common on this model? Is it faulty? Cheers

07-07-08, 07:50 AM	#17 (permalink)
Antennaman Member iTrader: (0) Join Date: Jul 2008 Posts: 50 Spent time on board: 13:25:38	Fernbay's on the money. It is a power supply issue, the hard drive is loading it more and causing spurious effects. The ABC problem could be caused by the generation of interfering signals arising from plugging the hard drive in, which is why another hard drive may work fine. There is something to be said for getting an off the shelf item, although even these can be plagued with there own idiosyncracies. The whistling is most likely coming from the power supply, they normally operate in the inaudible range unless overloaded or faulty. There again, it might be tinnitus - it can get worse after a few drinks.

08-07-08, 06:48 PM	#18 (permalink)
morroman Junior Member iTrader: (0) Join Date: Jun 2008 Posts: 7 Spent time on board: -	I personally dont have any problem with ABC and pixelation but the stock batteries for the remote leaked acid all over the remote and now it doesnt work Now the unit is useless, anyone know how to fix remotes???

12-07-08, 08:25 PM	#19 (permalink)
framtech Junior Member iTrader: (0) Join Date: Jul 2008 Posts: 5 Spent time on board: 0:29:52	hiya has the acid leaked on the circuit board. the company i used to work for use pcb cleaner to remove stuff like that even from terminals rgds jmaes

13-07-08, 03:08 PM	#20 (permalink)
navy blue Senior Member iTrader: (0) Join Date: Jan 2008 Posts: 223 Spent time on board: 10:58:21	Took it back, and got another, havent tested a HDD in it yet, the whistling noise is also evident in the replacement but nowhere to the extent the first on was. Can only hear it if u put the ear to it and no sounds around u.

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