Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
Was a little spicy but you survived it :P
Thanks for your help mate......
simple-me
Member
Last Activity: 01-10-2023, 08:11 PM
Joined: 01-11-2014
Location: Bradford
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
Got the tv working...after some serious technical help!
Thank you Tom66
Here's how it happened...
Replaced LDO U713, part 1117-33.
Output voltage was unstable 1.3V to 1.7V, changing when power button pressed. No shorts on output. Temporary bodge job connected 3.3V from one part of board to other - set then powered up.
Freeze-spraying regulator did not affect performance.
After this test showed signs of life, regulator was replaced with...Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
hello all,
I got a replacement psu and tried this but the tv will still not turn on!??
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
Correction...
I do get 24v on the white inverter cables when all the wiring is connected up!
...
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
I'll check around for pn# 3122 133 33122 PLCD 190 PT3 23341 and report back later...thanksLeave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
Multimeter.....should I look at replacing the PSU?Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
time for work guys...thank you very much so much so far...its been interesting
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
Is this the schematic for it?...Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
I think it says +5Vmo in??? cant be sure...its so small...Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
OK...I've used a resistor to limit the current....there is no 12v while the +5vstby and stby are connected
The back lights do not come on.
As for the writing I've attached a picture wasn't sure what you meant. They are labelled x532 and x521
Second picture is the actual inverter board....Last edited by simple-me; 01-20-2014, 11:29 AM.Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
No 24v on any of the inverter cablesLeave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
My BAD.....I forgot to connect the inverter board cables!!
I get the following voltages now..
from +5vstby and 2 pins below this I get 5.7v, stby is also reading 5.7v...Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
I've connected the 2 pins together as you instructed but Im not getting any voltages on any of the pins...?? Not sure if I've done it right...
Last edited by simple-me; 01-20-2014, 09:43 AM.Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
Am I right in thinking you want me to join +5vstb and the one marked stby pins together somehow...and then take a reading?
...
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
+stby is 5.6v, the other 2 are reading 0.33v...Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
I'll have to have a look tomorrow...I've got to get to work in half hour....thank you very much for your help so far...
Learning something new everyday
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
Forgive me for Multimeter...but where will the ps_on pin be?? Im sorry......
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
The only3 voltages coming up when turned on are where the 5.6v were showing. I get 5.6v at the +5vstby pin, the other 2 are showing 0.33v.
I cant find a fuse on the main board similar to how you mentioned, maybe Im looking in the wrong place??...Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
picture of main board and model/chasis number...Leave a comment:
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Re: *Please help* GRUNDIG GULCD37HDIT wont turn on
Is that bad??!!
Fixable?...Leave a comment:
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