Mulja tv repair portal

Equipment Repairs => LCD TV forum => Topic started by: mac18 on November 14, 2009,03:26:43

Title: technosonic lcd 1908
Post by: mac18 on November 14, 2009,03:26:43

HI, ANYONE GOT ANY IDEA WHAT THE SPEC IS FOR THE TRANSFORMER ON THIS LCD, AS I HAVE BEEN LOOKING FOR MONTHS TO GET A NEW ONE NOW TO TRY FOR AN EQUIVALENT ONE TO FIT.

Title: Re: technosonic lcd 1908
Post by: tv tony on November 14, 2009,04:39:17

hello, which transformer, the smps or the invertor one?

Title: Re: technosonic lcd 1908
Post by: mac18 on November 26, 2009,17:22:10

its the one at the top of the main power supply its marked zy-t0045 yellow in colour.

Title: Re: technosonic lcd 1908
Post by: mac18 on December 02, 2009,14:36:05

help required  :wallbash:

Title: Re: technosonic lcd 1908
Post by: mac18 on December 07, 2009,03:16:52

anyone know who keeps spares for this lcd?. web site ,phone number anything.

Title: Re: technosonic lcd 1908
Post by: sparky on December 07, 2009,09:57:14

can you post pic of power supply

Title: Re: technosonic lcd 1908
Post by: mac18 on December 08, 2009,16:29:59

Here is a pic of the psu section.

Title: Re: technosonic lcd 1908
Post by: sparky on December 08, 2009,16:35:46

what are they ringed for

Title: Re: technosonic lcd 1908
Post by: mac18 on December 08, 2009,16:51:30

these have been replaced except the one at top left.

Title: Re: technosonic lcd 1908
Post by: sparky on December 08, 2009,17:36:07

what is the original fault, is it dead or tripping try checking  the
two diodes on the heatsink at top of tne panel

Title: Re: technosonic lcd 1908
Post by: daz on December 09, 2009,09:08:13

test d102 for short or leaky and r110 for o/c
had the fault a few times
daz

Title: Re: technosonic lcd 1908
Post by: mac18 on December 09, 2009,14:07:50

transformer makes a high frequency noise after ten minutes when the back cover is fitted, if you leave the cover of it works fine changed the ceramic capacitors which made a slight difference, now think the transformer is over heating  creating this noise.

Title: Re: technosonic lcd 1908
Post by: Turnip on December 10, 2009,05:50:46

Hi Mac,

Used to dip such things into a tin of varnish or epoxy then hang up to set - some folks suggest superglue - always worked, but these modern chopper transfomers can get really hot in normal use - just a thought, only prob I had with this set was with a S/C  Shottky dual diode - Chris.

Title: Re: technosonic lcd 1908
Post by: mac18 on December 13, 2009,03:21:15

Tv Tony was going to be sending a new transformer back in march but never did. CHEERS TONY!!!!!

Title: Re: technosonic lcd 1908
Post by: sparky on December 13, 2009,03:30:25

hi
i thought i was waiting from tv tony long enough but
you beat me

Title: Re: technosonic lcd 1908
Post by: mac18 on December 30, 2009,08:54:14

The good news is managed to get a transformer from ebay and fitted it today, problem solved no more high pitched noise from tv  :clap:

Title: Re: technosonic lcd 1908
Post by: tv tony on December 30, 2009,11:59:24

im a reformed character, santa claus was good to me and gave me another 5 years, i spoke to sparky, hello sparky! and that lcd1908 transformer, got that too, are we all mates again, speak soon
tony

Title: Re: technosonic lcd 1908
Post by: mac18 on January 03, 2010,03:44:49

if you have a transformer then i will still buy from you.

Title: Re: technosonic lcd 1908
Post by: tv tony on January 03, 2010,03:48:47

hello, its yours, its on my bench, knew it would come in, just need addy and watch the speed it comes
tony

Title: Re: technosonic lcd 1908
Post by: mac18 on January 17, 2010,12:11:50

STILL WAITING!!!!!!

Title: Re: technosonic lcd 1908
Post by: tv tony on January 18, 2010,07:10:31

hello, it went on fri, pls let me know as soon as it comes

Title: Re: technosonic lcd 1908
Post by: sparky on January 18, 2010,13:31:45

hi
tony still waiting since i spoke to
you before xmas
sparky

Title: Re: technosonic lcd 1908
Post by: Turnip on January 20, 2010,12:11:19

Hi Folks,

Just a thought, but has anyone had an actual duff transformer, replaced to perfection - Wondering - Chris.

Title: Re: technosonic lcd 1908
Post by: mac18 on January 20, 2010,16:09:10

Removed and replaced with proper tools and know how now works a treat.

Title: Re: technosonic lcd 1908
Post by: tv tony on January 21, 2010,06:48:50

good, a long wait for you but sorted you in the end!