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Techika T835 firmware |
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#76 |
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Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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Quote:
That's great. Does it matter which way round the transistors are used i.e. which transistor in which place, as this isn't noted on the circuit diagram.
On the simulator page, you can play around with the values of the components to match what you have handy, to see if the circuit still works as desired. |
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#77 |
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Join Date: Jul 2006
Location: Nottingham
Posts: 935
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Spotted something odd today. Had the Young Apprentice set on series link and tonight's episode appears twice in the timers list. Tried deleting and adding a new series from the EPG and it has again doubled up tonight's episode, plus showing next weeks. Fortunately, there's nothing else set to record at the same time, so I'll see if I end up with two copies.
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#78 |
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Join Date: Aug 2007
Posts: 4
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is anybody else affected by the T835 switching the TV to the AV channel for a split second when it enters low power standby (either after finishing a recording or you switching the box off)? If you are watching the TV tuner it is incredibly annoying because once the T835 finishes recording something, the screen goes blank for a second or two before returning to the TV tuner. It may be that it doesn't affect all TVs, but certainly affects Sony ones.
I built futaura's modified SCART lead and confirm that it solves these annoying problems. Thank you futaura! I used two 2N3904 transistors, a 10K resistor (in place of 11k), 470k (in place of 820k), 47k (in place of left 4.7k) and a 4.7k (as original between SCART pin 8 In and Out). The value of this last resistor seems quite important. Circuit did not work with a 47K or 10K resistor as with these higher values there was a substantial voltage drop between between SCART pin 8 In and Out and the TV never switched away from its tuner. With 10K resistor I measured Pin 8 In at 5.7v and Pin 8 Out at 2.7v The simpler idea of disconnecting the Pin 8 signal and instead connecting Pin 8 directly to Pin 16 did not work. The TV never switched away from its tuner as Pin 16 gives 2.2 volts and this was not enough. Some experiments to reduce voltage on pin 8 to TV using resistors also did not work. |
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#79 |
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Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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Quote:
I have the SCART switching problems on startup and shutdown with Hitachi HDR255 and a 3 year old 40" Sony TV. It is worse on wake up from low power mode as the TV screen goes blank for several seconds.
I built futaura's modified SCART lead and confirm that it solves these annoying problems. Thank you futaura! I used two 2N3904 transistors, a 10K resistor (in place of 11k), 470k (in place of 820k), 47k (in place of left 4.7k) and a 4.7k (as original between SCART pin 8 In and Out). The value of this last resistor seems quite important. Circuit did not work with a 47K or 10K resistor as with these higher values there was a substantial voltage drop between between SCART pin 8 In and Out and the TV never switched away from its tuner. With 10K resistor I measured Pin 8 In at 5.7v and Pin 8 Out at 2.7v The simpler idea of disconnecting the Pin 8 signal and instead connecting Pin 8 directly to Pin 16 did not work. The TV never switched away from its tuner as Pin 16 gives 2.2 volts and this was not enough. Some experiments to reduce voltage on pin 8 to TV using resistors also did not work. Certainly the last resistor value is pretty important and it is dependent on the neighbouring transistor's hFE value. With a resistor too low, voltage will still leak through to pin 8 if the RGB pin is off. I don't know much more than that - I don't even remember how I came up with the circuit, but possibly I dug my A level physics books out of the loft . I'm sure there is a way to calculate the optimal values for all the components.
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#80 |
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Forum Member
Join Date: Jul 2006
Location: Nottingham
Posts: 935
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Finally got round to modifying the SCART lead. Solves the issue with the blip of pin 8 on going into low power standby. Unfortunately, still grabs control of the SCART during power up, just displays a black screen for a few seconds. Have noticed that as we have more items in the library, the power up/disk initialisation seems to be taking longer, so the SCART interruption on power up is more noticeable/annoying. I guess that we must have the earliest board, though haven't opened the box to confirm.
Anybody have any idea where I could source a later board, tried googling and looked on eBay without success. Do the 500Gb units have later boards? Still, it's a great bargain for the £43 and the SCART lead modification certainly helps. Cheers MarkA |
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#81 |
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Forum Member
Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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Quote:
Finally got round to modifying the SCART lead. Solves the issue with the blip of pin 8 on going into low power standby. Unfortunately, still grabs control of the SCART during power up, just displays a black screen for a few seconds. Have noticed that as we have more items in the library, the power up/disk initialisation seems to be taking longer, so the SCART interruption on power up is more noticeable/annoying. I guess that we must have the earliest board, though haven't opened the box to confirm.
Anybody have any idea where I could source a later board, tried googling and looked on eBay without success. Do the 500Gb units have later boards? Perhaps the resistors in the SCART modification need tweaking? However, firstly, have you tried measuring between pin 16 and pin 21 with a multimeter on the T835 SCART socket (with no cable/adaptor attached) when it wakes up to make a recording? If pin 16 is going high in that case, then obviously that's why the adaptor has no effect. |
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#82 |
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Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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v4.6 OAD 25-27th January 2012
Quick and late heads up - new T835 update being broadcast over the air from 9am tomorrow. Showed up somewhat last minute on the DTG site as it wasn't there at the weekend - BTW, the DTG only lists an update for the Hitachi models, but I'm 99% sure the Technika boxes will download the same update since the software is identical.
An ideal chance for those of you stuck with older software to update. Unfortunately, I am not aware of the changes since v4.1, but hopefully it's all positive. |
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#83 |
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Join Date: Jul 2006
Location: Lincolnshire, UK
Posts: 95
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Thanks futaura. Hopefully someone (!) will post a report on the success (or otherwise) of the T835 update after 0900.
It will be interesting to see if some of the bugs/deficiencies discussed in this thread are resolved by the update. |
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#84 |
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Join Date: May 2005
Location: Thatcham, Hannington Transmitt
Posts: 5,274
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Quick and late heads up - new T835 update being broadcast over the air from 9am tomorrow. Showed up somewhat last minute on the DTG site as it wasn't there at the weekend - BTW, the DTG only lists an update for the Hitachi models, but I'm 99% sure the Technika boxes will download the same update since the software is identical.
An ideal chance for those of you stuck with older software to update. Unfortunately, I am not aware of the changes since v4.1, but hopefully it's all positive. In case someone tries a manual update at 9am tomorrow (Wednesday) it doesn't starts until 10am. Colin |
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#85 |
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Join Date: Feb 2005
Location: Herts
Posts: 187
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Quote:
Thanks for the heads up. It would be great to update my Tesco Technika T835 currently on 1.9 (so suffers from failed recordings when in standby).
In case someone tries a manual update at 9am tomorrow (Wednesday) it doesn't starts until 10am. Colin never mind, lets hope the update to v4.6 goes smoothly for yours and my hitachi 255 |
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#86 |
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Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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Quote:
bit late now I know, but you could have updated to v3.4 here >>> http://www.vestelpvr.futaura.co.uk/T835.php
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#87 |
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Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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Ok, so I've updated my box to v4.6 - takes about 30 minutes, btw. The only thing obviously different with the user interface is the addition of a "Dcf number" field on the box that pops up when you wish to access the automatic/manual update options - and I only noticed that as I wanted to get the build date for v4.6
. Obviously, there must have been some internal changes, so it will interesting to hear of any improvements or quirks fixed. Of course, those running pre-v3.4 software will gain many fixes and improvements by upgrading to v4.6.On my box (running v4.1) the update did reset all the configuration settings to defaults (timers and library untouched) instantly noticable because it had switched to 4:3 mode, although it may be wise to perform a first time installation, but that will wipe your timers list. |
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#88 |
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Forum Member
Join Date: Jul 2006
Location: Lincolnshire, UK
Posts: 95
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Our Tesco Technika T835 updated itself today from v3.4 to v4.6. Unit was in LP standby and when I switched on (around 1130) the unit went straight to "First Time Installation".
Apart from a new option to set country and region, the FTI seemed standard. The unit then restarted with the recordings library and all timers apparently intact. Checking the configuration screen, this confirmed that v4.6 was now installed. The new "DCF No" field was as follows: "/0009DF/GordianT835UK003.dcf". A quick check of appearance and functionality revealed no significant changes from v3.4. In particular, I was disappointed that the opportunity to resolve some of the obvious regressions or bugs had not been taken. eg. 1) Showing info on a program being played, either live or recorded. 2) Leaving the "info" option selected when searching for programmes, rather than resetting it off with each cursor movement. 3) Providing sensible sort options for timers, rather than producing a random list. So, in summary, unless there have been significant "behind the scenes" improvements that are not easily identified, I fail to see any real point to this release. |
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#89 |
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Forum Member
Join Date: May 2005
Location: Manchester
Posts: 1,804
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Quote:
Ok, so I've updated my box to v4.6 - takes about 30 minutes, btw. The only thing obviously different with the user interface is the addition of a "Dcf number" field on the box that pops up when you wish to access the automatic/manual update options - and I only noticed that as I wanted to get the build date for v4.6
. Obviously, there must have been some internal changes, so it will interesting to hear of any improvements or quirks fixed. Of course, those running pre-v3.4 software will gain many fixes and improvements by upgrading to v4.6.On my box (running v4.1) the update did reset all the configuration settings to defaults (timers and library untouched) instantly noticable because it had switched to 4:3 mode, although it may be wise to perform a first time installation, but that will wipe your timers list. ![]() Thanks for the heads up btw. I looked at dtg but it didn't actually click that the Hitachi oad would include Technika. Saves me fiddling around with a series cable now. ![]() Previously v2.6(7?), mine offered to perform a first time installation, which I declined. All channels were deleted anyway so I had to perform a retune. Turns out all existing timers were also deleted, preserving only the recordings. Very unfriendly way of doing things. |
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#90 |
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Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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Quote:
A quick check of appearance and functionality revealed no significant changes from v3.4. In particular, I was disappointed that the opportunity to resolve some of the obvious regressions or bugs had not been taken. eg.
1) Showing info on a program being played, either live or recorded. 2) Leaving the "info" option selected when searching for programmes, rather than resetting it off with each cursor movement. 3) Providing sensible sort options for timers, rather than producing a random list. So, in summary, unless there have been significant "behind the scenes" improvements that are not easily identified, I fail to see any real point to this release. Although I secretly hoped for the 3 points you mention to be addressed, I am not surprised they were not, since the new T7300 PVR suffers from the same limitations. That said, the T7300 does always sort the timers based on the start times, so the next timer to be triggered is always at the top of the list. I have requested a "blue" button search option to be added, as per the EPG, but it's not a priority feature (certainly there are more important things to fix on the T7300). |
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#91 |
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Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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I've noticed a new feature of v4.6: it now supports the Target Region Descriptor. After performing an automatic channel scan, it'll allow you to choose a particular transmitter if the box has detected a signal from more than one transmitter. I saw this feature on the T7300 first, and this is certainly new for T835 v4.6 (wasn't in v4.1).
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#92 |
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Join Date: May 2005
Location: Thatcham, Hannington Transmitt
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Quote:
bit late now I know, but you could have updated to v3.4 here >>> http://www.vestelpvr.futaura.co.uk/T835.php
never mind, lets hope the update to v4.6 goes smoothly for yours and my hitachi 255 Colin |
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#93 |
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Join Date: Feb 2005
Location: Herts
Posts: 187
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Yes, but unfortunately uploading the software to the box manually requires a special SCART->RS232 cable/adaptor to be made, so it's not so easy as with previous models
.anyway update went ok here. got the choose region stuff too, seems a little faster in the menus, maybe its me getting older
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#94 |
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Join Date: Feb 2005
Location: Herts
Posts: 187
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Thanks for that. I could not be bothered doing that. I only use my Vestel PVRs as a back-up and the only issue was recordings in Low Power standby failing so I ensure the unit is out of standby or with LP standby disabled for any important recordings (mainly during the evenings or when I'm away).
Colin |
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#95 |
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Join Date: May 2005
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Quote:
hopefully that is cured now
Colin |
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#96 |
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Join Date: Jul 2006
Location: Lincolnshire, UK
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Well, obviously there must have been a reason for Vestel to pay to have this OAD...
For now, in the absence of a changelog, I guess we just have to observe empirically what has been added, taken-away or "improved"! |
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#97 |
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Join Date: May 2005
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I updated my Tesco T835 to 4.6 from 1.9 this morning. Generally my experience was the same as others.
I was taken to the First Time Installation screen following the download. After setting my options I was taken to the tuning screen and opted for an Automatic Channel scan. I did not lose my Timer settings. I'm not sure this is a good thing as if there had been changes in the Channel line-up this could potentially cause issues. The new Transmitter selection feature will be of benefit to users receiving signals from more than one transmitter which is becoming more common as transmitter power levels are increased following DSO. For users affected this will avoid the need to perform a more time consuming Manual Tune procedure. Colin |
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#98 |
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Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
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Quote:
I was taken to the First Time Installation screen following the download. After setting my options I was taken to the tuning screen and opted for an Automatic Channel scan. I did not lose my Timer settings. I'm not sure this is a good thing as if there had been changes in the Channel line-up this could potentially cause issues.
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#99 |
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Join Date: May 2005
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Quote:
That's a good point actually, which I'd forgotten about. Whether the timers are deleted on FTI has varied between releases. It's a good thing if you are using the automatic scan to add new channels, etc. However, with v4.1 it can go badly wrong if you have timers set on a channel that moves to a different LCN, mux or frequency. In such a case, navigating the timer list with the info pane open can cause the box to instantly reboot (actually, at the time my T7300 box did exactly the same). In such a case, the affected timers need to be deleted manually and rescheduled via the EPG as normal. Maybe they fixed this with v4.6 though. I had this experience during DSO in November.
Regarding the INFO feature I noticed that if the Timers list is accessed with the INFO feature enabled the top 4 entries are obscured by the part of the screen used to display the Synopsis. I don't recall seeing this quirk on 2.7 and 1.9 software on the T825 but I remember it on at least some versions of the T816 and T825. Colin |
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#100 |
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Forum Member
Join Date: May 2005
Location: Thatcham, Hannington Transmitt
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Quote:
A quick check of appearance and functionality revealed no significant changes from v3.4. In particular, I was disappointed that the opportunity to resolve some of the obvious regressions or bugs had not been taken. eg.
1) Showing info on a program being played, either live or recorded. 2) Leaving the "info" option selected when searching for programmes, rather than resetting it off with each cursor movement. 3) Providing sensible sort options for timers, rather than producing a random list. So, in summary, unless there have been significant "behind the scenes" improvements that are not easily identified, I fail to see any real point to this release. Colin |
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. I'm sure there is a way to calculate the optimal values for all the components.
.

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