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Hi.....
Need contact details at india - chennai (or) coimbatore.
to get a ic for the above mentioned TV model. since the tv's ic was damaged from April.
Regds...........Sikamani.
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you replaced the power amp ic before that you need investigate the condition of power ic and it's very simple when you terned on the tv set you can hear the small pop noice from the tv speaker means the power ic is good other way is just tuch the screw driver to sound if output stage you can hear the DERRR sound from the speaker
if it ok pls check the mute transistor
It could be the vertical output IC, but there may be other possible causes which include:
- bad solder contacts on deflection yoke connectors or dirty connector contacts (on the circuit board and / or on the picture tube neck)
- bad solder contacts on the vertical output IC or associated components (check for little cracks in the solder around the pins, these are so called "cold" or bad / broken contacts)
- power loss to the vertical output IC - check for any burned resistors or other components around that IC, assuming you know which one it is - see which ICs are connected to the wires going to the deflection yokes (coils) on the picture tube neck and check them well.
You need to resolder any bad contacts, clean any dirty pins on the connectors and replace any burnt out components (assuming you can still determine the type or value of the component).
Since you mentioned the problem occurs once in a while, this means that the IC probably fails when it warms up, which can often happen if there are loose connections or bad solder contacts.
Anyway, it could turn out to be a faulty IC, i just suggested a few other things that can be fixed quite easily, and possibly without the need to replace any of the components.
the model you have given was assemble in the philippines, and i was the process engr. then. i will try to look on my kits if i do still have a spare system ic.
Hi, You didn't mention comprihensive details (e,g: model number if its on st-by does the led blinks in a specific number of times) Anyway there must be two possible causes of st-by 1-First problem could be the remote/remote censor 2- second problem could the the malfunction of EPROM (memory IC) 3-Third cause could be the system IC.
Please contact any expert nearby. Thanks for using fixya.
Transcend does not have any service center in India!!!! They do all their warranty related work through their distributors. You need to contact their distributor in direct way.For distributors click on the link below: http://www.transcendusa.com/Contact/CuPartner.asp
A line running across the screen like that and then returning to a picture I would guess is the vertical IC has some poor solder joints. The vertical IC in that unit IC401 is an LA78041 a seven pin IC that is mounted to a metal heat sink. On the foil or under side of the board take a careful look at the pins of that IC and any that look suspicious carefully re-flow some solder over.. Careful not to keep your iron on the pin too long.. And if have to re-solder several take some time between them to allow the IC to cool so you don't damage it..
Good Luck
Bill
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