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Equipment Repairs => LCD TV forum => Topic started by: coss on July 08, 2008,11:12:36

Title: LG str-t2268
Post by: coss on July 08, 2008,11:12:36

Hello all, first time here,

Im trying to repair the power supply for a LG 37LB1R (ML-051 same for rz37lz55), the strt2268 is blown. I got one and started to test the other components, i found c924, c921, c920 faulty.

Can anyone tell what are their values, ore spare me the schematics please?
any other components i should check besides d911 and r920?

Thanks a lot!

Title: Re: LG str-t2268
Post by: mulja on July 09, 2008,05:02:40

Parts available in kit form and as complete power supply very cheap from Charles Hyde

Title: Re: LG str-t2268
Post by: tv tony on July 09, 2008,06:07:26

hello all, unfortunately the kit is no longer available, but the whole pcb is only £12.35+vat. trade
 they dont know when it will be available again
tony walker

Title: Re: LG str-t2268
Post by: tv tony on July 09, 2008,08:26:27

but here is the circuit anyway

Title: Re: LG str-t2268
Post by: coss on July 09, 2008,09:17:10

I have found the chs kit part list and its:

C920- 224K 50V
c921- 475k 16V
C924- 105K 16V
all not polarised smd

Is that 220pf - 4,5nf - 1nf
or
220nf - 4,7uf(?) - 1uf

Thanks a lot!

Title: Re: LG str-t2268
Post by: ggg3 on July 10, 2008,04:10:12

Check the following elements;  C919=1000nf/ C920=0,1mf/ C921=1000nf/ C922=0,1mf/ C924=0,1mf/ ZD911=3.3V/ R920=330/ R972=100/ R1018=750

Title: Re: LG str-t2268
Post by: coss on July 10, 2008,09:33:22

Quote from: ggg3 on July 10, 2008,04:10:12

Check the following elements;  C919=1000nf/ C920=0,1mf/ C921=1000nf/ C922=0,1mf/ C924=0,1mf/ ZD911=3.3V/ R920=330/ R972=100/ R1018=750

Hello,
I did that, c920, c921, c924 are in shortcut, rest of the capacitors are ok, thats why i asked for thier values.
I see that yours are very diferent from charles hyde kithttp://www.chsinteractive.co.uk/pdf_data/23007DX.pdf (http://www.chsinteractive.co.uk/pdf_data/23007DX.pdf) .

What should i try?
Thanks a lot

Title: Re: LG str-t2268
Post by: ggg3 on July 10, 2008,11:30:26

Hello,
Check all the elements that I wrote and replace STR T2268.               

Title: Re: LG str-t2268
Post by: coss on July 11, 2008,02:50:56

Hi ggg3

sorry to insist on this, i just got the psu diagram and there the capacitor values are the same as i posted before. Why are yours diferent, is that a modification i should do?

thanks.

Quote from: ggg3 on July 10, 2008,11:30:26

Hello,
Check all the elements that I wrote and replace STR T2268.               

Title: Re: LG str-t2268
Post by: tv tony on July 11, 2008,06:43:42

hello, we will get u sorted,
                                      hello to russia,
i can get you the uk address for a full psu, approx 12.00 plus
vat, they are a universal psu for this model, but i can verify that chs no longer stock the kit, that is why tho full psu is so cheap, regards,
tony walker