Where is my output ic situated - Sony LBT-ZX6 Shelf System

hello sir,

often this is sound IC fault, if one IC there change it and it will fix the other audio output, as the sound IC have two outputs and one of it doesn't output the audio,

if two sound IC's, it's a must one of it is faulty, you better change both for long run of the audio amplifier

good luck

Is the UTC2003 IC your main IC?
You can't find inputs or output of this IC?
This IC is power Operational Amplifier simply. It has TWO inputs noninverted = pin 1 and inverted = pin 2 and ONE output = pin 4. Pin 3 is ground and pin 5 is supply voltage. It's simple as the rake! What is your problem? Sorry for my rusty English...

There is no horizontal oscillator IC. The horizontal oscillation is generated and outputted by the main system control IC LA76810 itself. Refer some circuit diagrams using LA76810 to get more details about the horizontal oscillation output from the IC. Measure the frequency at that output pin. It should be some ever near 15.62KHz.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Type in the IC number, in the search box [at the top right] of the display window, and press enter to get all related posts. It will make surf easy.

that could be cause of loose or broken solder on the vertical circuit esp on vertical output ic.. you can easily fix that resoldering the loose and broken solder esp on the vertical putput ic.. thanks

Hello
Your tVs horizontal output and oscillator has some trouble with it. When the power supply gets ON, the horizontal frequency that drives the horzontal output section won't generate the horizontal frequency, that output section wont' work, the main system control microcomputer IC will sense this situation, and give shut off signal to the power supply. That is happening now with your tV.
A through checking on the main board should be done to detect this fault. you must have sound knowledge in electronics, how the TV works. Also must have all testing equipments with you including a high quality digital multimeter. Normally this fault occurs due the main chorma-video jungle IC. But before replacing it, you have to check all other components in it. Some loose soldering contacts may also make this problem.
If you have the ability and skill, Inform me. I'll assist you. OK.

I have found in some situations the cause is in the output stage of the audio ic's, the safety circuits disable the outputs and when that happens the B+ to the display is not present. But it is possible the processor ic has failed causing all functions to be dead. One possible solution is to unplug the receiver for at least 30 minutes to see if the processor will reset. The final option is to have it checked by a professional.

If the main fuse is blowing it is a power supply problem, or it is more than likely the audio output ic's are the issue. This is where a professional would be invaluable at this stage of the game because this a situation where cost could be a factor.

It sounds like drivers or the output IC is the problem in the right channel, this is a repair that will require a professional to address this situation.

Hello
You are seeing vertical retrace lines on the top of your TV screen.
There are mainly three causes for it. I don't know the age of your TV. The first cause is due to the supply voltage lack to the video output state. You can check it on the picture tube base card. You haven't mentioned about the diamension of your TV screen. So it can be say as a guess. If your TV is 27", the voltage mantioned above will come to about 245VDC. If there is a great voltage loss, check the smoothing capacitor to that supply, will normally come to the value of 10MFD 450V.
The second one is, capacitor related to the vertical output stage of your tv. It is in the circuit board. Normally these capacitors are situated in an area, which will get hot during working. As s result, there is a chance to the value change of their capacitance. It is best to replace all of them, as it may not cost too much. Before desoldering it out, mark the value of each capacitor is best. Normally replacing the filter capacitor 3300MFD or so,to the power supply to the vertical output Ic will solve this problem.
The third is related with the vertical output Ic itself. Just check all the soldering points in the vertical output section of your tv board. Anyway, resoder all suspected soderings by applying a little more solder, as bad solderings to the legs of the Ic or some other components also may the cause. OK.

Try tapping the side of the set to see if it reacts,Audio output Ic's develop loose conections and hopely this is one of those situations and all it needs is resoldering,if you remove the back cover follow the speaker wires and they should take you close to were the output IC is,it is mounted on a heatsink,if the set is not stereo it could be a bad speaker.The loose conections or the speaker are two possibilities you can probably take care of but if you are not too familiar with tv service be safe and call for assistance from a servicer.Let Us know how it goes or if you need more information.