Forum > LCD TV forum
Bauer XT32 / Phihong PSU fault
ProDave:
I'm still waiting for my PSU (ordered from ebay from Hong Kong). In the mean time I've been testing the set, still on the bench psu.
Two problems found:
Scart input will only work on PAL. If I switch the sky box to RGB, the screen blanks and the sound mutes, though the status box pops up on the tv screen to announce "RGB SCART" So it's detecting RGB, just not displaying it.
The hdmi input won't display a picture from the sky box, I've tried all the different output resolutions on the sky box, but no picture on the tv. The status box says "hdmi 0 Hz" rather suggesting it can't see any signal. I know the sky box is okay, it's hdmi output works on another tv.
The component Y Pb Pr input works fine, and displays a stunning HD picture.
Anyone got any ideas about these non working inputs?
And does anyone know how to get into service mode on this tv? I'm sure I saw it somewhere, press menu then 4 digits, but I can't find it again.
Thanks.
ProDave:
Here's the finished "project"
The 24V PSU has arrived, it only took a week from Hong Kong.
So if you look at the photo, the silver perforated box is the new 24V PSU. To the right of that the black box with red writing is the 12V switching regulator, and further right still, the grey box is the little linear PSU to provide the 5V standby.
The orange thing to the left of the 24V PSU is the relay that turns the main PSU's on when the set turns on. If you think it looks a bit large, the first one welded it's contacts after 3 operations, so I've fitted a large one and also a contact suppressor this time.
And if you look carefully at the stand, you will see it's from a different set with different mountings, so 2 bits of steel bar bolted on to extend that bracket to mate with the fixing screws for the original stand.
You can still see the splat marks on the chassis where the orignal PSU blew up.
tv tony:
excellently engineered but its hardly a green tv now is it, must say though it requires great thought and a touch of madness to achieve such a thing, takes me back to when i used to mod sony kv1810,s to take line transistors and modified a sony kv2000mk11 to take a g11 psu, happy days
tony walker
ProDave:
I'm not sure I understand the bit about this mod not being "green"?
Are you referring to the power consumption? If so, this set now draws 0.5A @ 240V when running, which gives a power consumption of 120W. The rating plate on the back of the tv says 120W also, so it looks like my cobbled together PSU is just as efficient as the original one.
I think this is very green. The alternative was a set that was probably uneconomic to repair, so would have ended up as scrap.
This is not my first unusual mod to a tv. I've done one or 2 other unusual things, starting many years ago when I fitted a solid state tuner module from a scrap tv into a valve set. I had to fit a couple of dropper resisters to complete the heater chain in place of the 2 valves in the original tuner, and cobble together a 12V supply for the solid state tuner. But it worked like that for years.
Incidently, I've done some more work on this set today. Once I put it into use in my living room, it very soon became clear the sound from this set was very poor. Both in terms of lack of bass, and annoying vibrations at certain frequencies.
This was solved by fitting a different pair of speakers from a scrap crown set, which thankfully were the same physical size, and the vibrations were tracked down to parts of the chassis that were vibrating together at certain frequencies, cured by securing the loose parts with aluminium tape.
I know this was a budget tv, but how the designers could let it into production with such poor sound astounds me, particularly given how easy it was to improve.
halen:
Hello
I have Telra@ PT1000 chassis, same with attach in this thread and I have problem. I played with service menu (what mystake) and set bad LCD display type. This is in menu Option / LCD. I have LG 32" and set wrong display. Please is there some way to restore it? Now TV dont display anything, only audio works. TV remote and buttons on TV doesnt work too. Please help me.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version