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Crumbtrail TV Forums: TV Equipment: LCD TV Forum:
*Please help* GRUNDIG GULCD37HDIT wont turn on

 

 


simple-me
New User

Jan 12, 2014, 4:53 PM

Post #1 of 17 (5553 views)
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*Please help* GRUNDIG GULCD37HDIT wont turn on Can't Post

Someone please help, my Grundig GULCD37HDIT wont turn on and is stuck in the standby light. Frown



jts1957
Veteran


Jan 12, 2014, 8:04 PM

Post #2 of 17 (5541 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

Are power supply standby voltage(s) and turn on voltage present?

If so, then what, if any other PS sources come up (AND do they remain up?)?


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Location: Far, Far Away


simple-me
New User

Jan 13, 2014, 5:14 AM

Post #3 of 17 (5532 views)
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Re: [jts1957] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

Hi jts1957 
I don't have a multimeter to test the voltages. Also my skills and knowledge in this area are limited.
If you mean is there power then yes...the red led light shines up. When you press the standby button to turn the tv on the red led light dims.


jts1957
Veteran


Jan 13, 2014, 6:31 AM

Post #4 of 17 (5531 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

The plug-in connectors have short labels associated with many of their pins. Being able to read these would be helpful (badcaps pix not angled or focused onto).
You may also wish to peruse youtube videos on how to use a DVM, how to test various components, etc. It's really not that complicated provided you can follow some common sense rules.
Obtaining various voltage readings is just the start.


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Location: Far, Far Away


simple-me
New User

Jan 18, 2014, 6:35 PM

Post #5 of 17 (5496 views)
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Re: [jts1957] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

I had the meter on the wrong settings....lol apologies. Below are the correct voltages when in stby.


Hi jts1957

When I turn the tv on its in auto in standby. I get 11.5v on 3 pins and on 2 of them voltage doesnt stay up. I also get 25.5v in 2 places (+12vL) and these also don't stay up. The only voltage to stay up is the +5vstby which shows a constant 11.5v.

when I press the stby button on the remote I get a constant 25.5v in the +12vL pins. I also get a constant 11.5v at the 5vstby pins.

hope this makes sense. I have a picture showing all the voltages but I don't know how to put it up.

Frown


(This post was edited by simple-me on Jan 19, 2014, 10:35 PM)


Ron.M
Veteran


Jan 18, 2014, 7:19 PM

Post #6 of 17 (5494 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

A quick butt-in-ski;...

For jts1957's benefit;...

What are you using for ground when you take the voltage readings ???


If you can , copy & paste pix in reply box....
Or post a link to the pix & we'll go there...

Good Luck...Sly...


Later...Ron.M....Cool
Veteran & Retired TV technician


simple-me
New User

Jan 18, 2014, 10:06 PM

Post #7 of 17 (5491 views)
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Re: [Ron.M] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

Im using the tv chassis to ground??? A grounding cable was attached to a screw...I hooked on to this


(This post was edited by simple-me on Jan 21, 2014, 4:34 PM)


simple-me
New User

Jan 20, 2014, 5:08 PM

Post #8 of 17 (5453 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

Can anyone help with this please? :(


jts1957
Veteran


Jan 21, 2014, 6:58 PM

Post #9 of 17 (5426 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

Needn't start a new thread each time your original one dies.

I think that having a standby LED lit and 11.5VDC (instead of 5VDC) as your stand-by are probably incompatible, most likely due to your unfamiliarity with electronics in general, how to use a DVM and where to position ground lead of same.


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Location: Far, Far Away

(This post was edited by jts1957 on Jan 21, 2014, 6:58 PM)


simple-me
New User

Jan 23, 2014, 1:55 AM

Post #10 of 17 (5408 views)
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Re: [jts1957] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

Hi...sorry I thought I was in the wrong forum for repairs.

I have the correct voltages now...I had the meter on the wrong settings :)
Will upload the pic soon...thanks


simple-me
New User

Jan 23, 2014, 6:16 PM

Post #11 of 17 (5399 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post




simple-me
New User

Jan 23, 2014, 6:17 PM

Post #12 of 17 (5398 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

these are the voltages I am getting


jts1957
Veteran


Jan 24, 2014, 12:16 AM

Post #13 of 17 (5385 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

I assume (having lost my x-ray vision) that excluding the top two pins, the 10 remaining pins having only 6 labels means some use 2 adjacent pins.

What's BL_ON doing when the set is turned on?


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Location: Far, Far Away


simple-me
New User

Jan 24, 2014, 10:09 PM

Post #14 of 17 (5377 views)
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Re: [jts1957] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

there is no power on BL_ON when the set is turned on. Those are the only voltages coming up when out of stby shown in the pic.


simple-me
New User

Feb 5, 2014, 10:41 PM

Post #15 of 17 (5283 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

I bought a replacement psu to rule that out but the tv is still the same!!???

Can anyone help please...???? Frown


jts1957
Veteran


Feb 6, 2014, 12:21 AM

Post #16 of 17 (5277 views)
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Re: [simple-me] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

If +12VL toggles up and down at your command (and stays after YOU command the set to turn on, but BL_ON doesn't, I'd suspect the Control/Main board. However without service manual ...


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Location: Far, Far Away


simple-me
New User

Feb 6, 2014, 12:53 AM

Post #17 of 17 (5275 views)
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Re: [jts1957] *Please help* GRUNDIG GULCD37HDIT wont turn on [In reply to] Can't Post

I can control +12vL up and down, but I don't get any voltage on the BL_ON pin whether I turn the set On or OFF.
Unless I'm doing it wrong...? <br>


(This post was edited by simple-me on Feb 6, 2014, 12:59 AM)

 
 
 


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