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Equipment Repairs => LCD TV forum => Topic started by: iandmills on February 13, 2007,10:38:42

Title: lg/rz-15la70
Post by: iandmills on February 13, 2007,10:38:42

standby light on wont switch on can anyone help

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Post by: mulja on February 14, 2007,04:17:31

Need more information as to what you have checked etc.

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Post by: iandmills on February 15, 2007,13:29:39

the 3 and 5 volt lines are present the 15 volt line is also present but it does not discharge after the supply is removed 1 hour after the supply is removed 15 volts is still there.

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Post by: iandmills on February 15, 2007,17:32:54

it also says on the back of the  set rz-15la70 rev a

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Post by: mulja on February 16, 2007,05:01:47

Check the voltage on base of Q701 and press the standby button and see if the voltage changes. If it changes you should have -15v, +15v, +12v, 3.3v and 5.5v. If this happens then your power supply and microprocessor are ok the set is coming out of standby and your fault lies elsewere.

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Post by: iandmills on February 17, 2007,14:54:40

i have downloaded the circuit diagram and it looks nothing like the set i have it shows the main board and psu on one board the set i have has  a seperate psu from the main board,now i am a bit confused because rz15 la70 is the modle number on the set any ideas.
 man thanks ian

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Post by: mulja on February 18, 2007,04:21:55

Can you supply chassis no e.g. ML-024E or picture of
chassis

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Post by: iandmills on February 18, 2007,13:40:47

cant find a chassis number but here are a couple of pics
[link=../../e107_files/public/1171967948_1_FT0_1171737647_547_ft160_picture_013.jpg][img:width=100&height=75]../../e107_files/public/1171967948_1_FT0_1171737647_547_ft160_picture_013_.jpg[/img][/link]

[link=../../e107_files/public/1171968023_1_FT0_1171737647_547_ft160_picture_012.jpg][img:width=100&height=75]../../e107_files/public/1171968023_1_FT0_1171737647_547_ft160_picture_012_.jpg[/img][/link]

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Post by: wock on February 19, 2007,17:38:40

try removing and refiting the micom
the ic in the holder on the main pcb these gave a lot of problems during production