Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
I had my meter in diode test mode, with the COM connected to the base, that's all I did on both tests.
I have tested a brand new low ESR 470uF 35v cap and its 0.04 on the meter.
wa11y
Member
Last Activity: 07-23-2016, 02:21 PM
Joined: 02-12-2013
Location: Nth/West Sydney
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
Both of those transistors have the same part numbers. The collector of Q4 goes directly to pin1 (on.off) on CON8... I tested between the base and collector, + base and emitter and got no reading on either of those transistors, are they really NPN transistors the numbers on them are t1a 86 (since its sideways im not sure it could really be 98, but I think it is 86)
Well I did already take the majority of the caps off so at least here is what i got on my meter (making sure to zero it after...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
No the backlight itself appears to be functioning perfectly the screen looks just as it should.
Well tom already said.
& now realising that the mainboard actually supplys the ON voltage for backlight please tell me would it still be possible to be the caps on the mainboard?? I mean unless there is a bad eeprom or failure of one of the SMD IC's or something it probably would be right?
OK now what I maybe should have...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
Cool well we have back lights now!!
However (not sure if its an issue at all) but the power supply is making a constant very fast ticking/clicking/zapping noise , I measured across the big filter cap with my meter and I can see that the the zapping seems to be because of extremely fast voltage fluctuations, just like what was happening before but HEAPS faster (I can only see the fluctuations by looking at the analogue bar as there way too fast) ..
Is it normal behaviour...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
I jumpered pin 1 to 2 with CON2, but now I look at the 'service manual' I linked on the first page of posts, it says there that CON2
1 ON/OFF Power switch
2 STB5V Stand by 5V
and that
CON8 (THAT ACTUALLY COMES FROM THE MAINBOARD TO THE INVERTER BOARD)
1 ON/OFF Inverter switch
2 ADJ Adjust backlight
Do I have to jump Pin1 & 2 on CON2 as well as send 5v down the ON/OFF of pin1 of CON8??? Im confused now.
...Last edited by wa11y; 02-20-2013, 11:02 AM.Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
The DCV doesnt fluctuate at all, the SMPS really seems to be supplying all the needed voltages, with the resistor in im getting a solid +5, +12 and +24., but since my backlight doesnt light up is that likely to be the main cause? or the inverter board? And is there any way I can tell or test say the individual 'globes' of the backlight if I have a laptop inverter handy or similar? or has it all been done now? Time to throw it in the bin??
Well I have an ancient fluke 8020a at my...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
Just measured AC across the large filter cap and it 'sitting' at 25VAC, it spikes up to 30V regularly but never gets under 24-25VAC.. Is that normal?Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
I should have said..
T101, T102, T103 - M LT-4014-1 NY0931CC Y
T104 - LT-4014-2 NY09310C YLeave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
T104 is a different transformer.
Its about 2/3 the size of the other three.
M LT-4014-1 NY0931CC Y (there are [COLOR="Red"]3 [(THREE) NOT 4][/COLOR] of these) (....I said there was 4 before it was a mistake)
LT-4014-2 NY09310C Y (this is the LAST one, and only ONE of these)Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
T104 is a different transformer.
Its about 2/3 the size of the other three.Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
Hello again.
Transformers listed left to right.
T101 - [S1-S2] - 1.512kΩ
- [S3=S4] - 1.509kΩ
T102 - [S1-S2] - 1.502kΩ
- [S3-S4] - 1.497kΩ
T103 - [S1-S2] - 1.519kΩ
- [S3-S4] - 1.513kΩ
T104 - [S1-S2] - 1.040kΩ
- [S3-S4] - 1.040kΩ
Both fuses are ok (>0.5Ω)
Ill test to see what AC is coming through as...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
No its ok I see now, I was just confused beofre.
The part numbers for the transformers are
M LT-4014-1 NY0931CC Y (there are 4 of these)
LT-4014-2 NY09310C Y (this is the LAST one, and only ONE of these)
I was reading this page for a while last night.
[url]http://www.kellerstudio.de/repairfaq/sam/smpsfaq.htm#smpscfbyp[/url]
I was actually thinking the first time I heard the 'buzz', "I wonder if thats a 50Hz buzz",...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
I thought it did because I was looking at
and it has this on the example power board:
Function Inverter power
Connector CON4
No Symbol Definition
[COLOR="Red"]1 12V standby on/off
2 12V Stand by 5V [/COLOR]
3 GND Ground
4 GND Ground
5 GND Ground
6 5V 5VDC out
7 5V 5VDC out
8 5VSB 5V stanby
9 STB Standby control
10 5V 5VDC out
11 5V 5VDC out ...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
Is the 4.6v on standby really OK??
It does say 5.2VSB on the M/B
edit:nevermind I just realised it used 12v for the ON/OFF not 5v...
BUT in saying that can someone please explain why this is the case??
Pin 1.. (on CON2) is already getting 4.6 and needs the 12v for on/off??
Do you mean to jump 5v to pin1 on CON8 for the inverter or something or should I be jumping 12v onto pin1??...Last edited by wa11y; 02-14-2013, 07:23 AM.Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
Mother In Law told me that the red light was solid and would only ever change when the power would come on, the red light would go out for a few seconds and she things a green power light then comes on. She didnt remember the flashing at all so not sure if thats normal or not.Leave a comment:
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SMPS Model ## FSP264-4H01
Your 100% right the model is..
[B][U][SIZE="7"]FSP264-4H01[/SIZE][/U][/B]
There is actually a photo of the model# ("[COLOR="Red"]4 -SMPS - MODELs[/COLOR]") in my first lot of uploaded pictures I failed to actually mention what it was or about the photo so its my fault there..
SMPS Model ## FSP264-4H01
Your 100% right the model is..
[B][U][SIZE="7"]FSP264-4H01[/SIZE][/U][/B]
There is actually a...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
fair enough, I wasnt sure if it mattered so did anyways since wouldnt hurt,lol, but now I know thanks tom
Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
It's not uniform.. Here are some more pics for you good sir.
EDIT: It looks like its supposed to have that 'dimple' in the middle from what I can tell..??...Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
I just replaced it with a nichicon cap I harvested from a old board I had here.. Exact same results as before
(The board was 'good' & not exactly from a dead TV it came to me from a set who's owned decided to throw it on the floor to break the screen during a fight with their spouse, screen was all trashed and I harvested the boards, so I could use now I suppose..lol[well thats what ill tell the mrs later].)Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
Oh im obviously blind.
Its only 10uF ill grab one this arvo from the store should be cheap enough....
.....& I dont own a hairdryer... Dont own enough hair these days to justify owning one I dont think. (although so many times I wish I did have one never once for my hair though)
Ill just hit it with hot air and see what happens..
Leave a comment:
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Re: 40" LCD Rank Arena (rebadge?) has standby, V+ seem OK, but wont turn on.
How hot should I aim for? like 50c ?
You do mean the nippon KY 1000uF cap at EC5 dont you?? Dont know if it matters to you but I did have those 3 caps out already and tested them for ESR before putting them back (most likely into different spots) so would it be likely that even after swapping it with one of its 'sisters' it would still do this?
Im actually waiting for some new 1000uF caps so if no luck with my heat gun I will have to report back when I actually know something...Leave a comment:
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