TV repairing?

Repairing tv needs various components and diagrams.
Ok so you want to service your own TV, well i will briefly describe what you may need. First and foremost you need a Service Manual, why you may say? well if not for the troubleshooting algorithms, and component placement. The MOST IMPORTANT thing is that these manuals give us the PART NUMBER that identifies EVERY component and part in the TV. Without this number you simply cannot order parts, as there is no way to describe what you need, without it. 
You need a Good Multi Meter. 
You need an Isolating transformer if you do not want to kill yourself. 
You may like to make a pair of switchable out, 100 Watt light bulbs wired in series in the mains circuit, to "Buffer" the Voltage and so you can work on hic-upping switchmode power supplies. 
Ideally an Oscilloscope. at least 100MHz. Dual Input. & 1:1 & 1:10 Probes; 
Tools, include, Torx drivers, Philips screwdriver, Slot, Small Side Cutters. Long nose Pliers, Tweezers, Soldering Iron, 40 Watt fine Conical Tip. Solder, De-soldering Pump.. Various "Solder Picks". Small Dentists Mirror and Magnifying glass. 
Also a Dual Output Power Supply, proves invaluable. 
With the help of the above mentioned tool and service manual, you can repair your tv.
But basically you need to have voltage testing and soldering iron using knowledge.With you this knowledge it will be difficult for you to start troubleshooting.

Connecting External device to TV?

There are many external devices like
laptop,pc,computer,dvd,vcd,sat rec,player etc etc.
Which you can connect to your tv.
Connecting this up will be easy. What you do is get a yourself a set of the right, for your setup, cables. That uses EITHER one of the formats, of these described, below. You will need, either, a THREE way Cable, or three separate " Coaxial Cored" Cables with RCA PLUGS on them. Colored Yellow, (Video) Red, & White. (Audio) AV. OR If you haveSCART Connection Sockets, it's a big Black Socket at rear of unit(s), you get a SCART Cable.& It's all inside. Now some units, use a standard calledComponent Video, that uses, a Green, Red, & Blue Plugs. Also we have with the "Component Video" it is marked "Y" "Pb" & "Pr" these simply go color to color at BOTH ends, this is where the Red, Green, & Blues, colored Ends, of the Wires, goes, remembering that this is ALL only Video. With this method, you still must use the AV, red & White, Audio, Inputs to get the "Sound" into the unit, with the Component setup, you will also ,need, Two more Cables, for the AV Audio. these are, Red &White.(So with Component Video there are 5 Cables/Plugs in all). In any event ALL Cables go Color to Color, at each end, plugging into the corresponding Colored RCA Jacks, on either machine, or VCR or TV. Now if you have SCART, then it simply plugs in only one way. It is that simple. So connect up with the leads your set uses, and select the correct "Input" from TV/Remote, it is NOT on a "Channel" it will be on AV, AUX, and Press "Play" on VCR/DVD whatever.... should be all go.

Right, well, IF your TV has a DB15 Female Plug on it then you CAN, connect it up and it will work, as a second "Monitor". OR If the laptop, has a "Composite Video" a Yellow RCA socket, then you can, connect to the TV's Composite IN. & it will be a second monitor. Otherwise you cannot, the VGA signal is NOT compatible with a TV's input. SOME cards have a connector that plugs into the DB15 and to the TV, but they are "Special". In saying that though you can "Micky Mouse" things together and get an output, but it real poor quality, and disappointing results, there are various posts on the net about doing this if you wish. 
Remember DRIVERS, you also need the drivers installed & setup correctly in order for the hardware to work. As a tip, When connecting to a TV, always connect like this......First, plug all cables into TV's correct Video input(s). Connect up the Sound, plug all cables into laptop, turn TV ON. NOW, start the laptop, you should now soon see the an image.
NOTE: Some laptops & other devices, have HDMI out, sometimes, the AUDIO is not passed through, the HDMI cable, & the Audio must be run from Audio/Line OUT on laptop to AV IN on TV.Also some laptops have a socket that a multi-way 4/5/6/7 pins. A connector plugs into this, you then can connect to these connections, as you would normally. Also we have "Component Video" marked "Y" "Pb" & "Pr" these simply go color to color at BOTH ends, this is where the Red, Green, & Blues, colored Ends, of the Wires, goes, remembering that this is ALL only Video. With this method, you still must use the AV, red & White, Audio, Inputs to get the "Sound" into the unit

At the rear or side of the PC there should be either or both of a 15 Pin DIN Plug, HDMI socket. or a Yellow RCA or 4 -7 pin DIN. Now IF these are present then YES you can connect to a TV. Now some TV's have a connector a DB15 MALE, so that the cable from the PC to the TV, is DB15. this plugs in directly, with appropriate DB15 cable. This, however, will ONLY take the VIDEO to the TV, Audio is delivered via the "Audio Out" Jack on PC, and Plugged into the AV Sockets on the TV, with a dual cored coaxial cable, they are Red & White. Some PC's also have a Yellow RCA Connector, OR a 4 -7 Pin DIN Socket, that requires a Special Adapter Cable (That generally came with the unit, and are colored and marked as to output) to use, for Video/Audio Out to TV. This signal is Composite or SVHS Video & Stereo Out. This connects up TO the TV's Composite/SVHS input Jacks and the Red & White Audio IN, RCA Jacks, &/or DIN SVHS socket. Also we have "Component Video" marked "Y" "Pb" & "Pr" these simply go color to color at BOTH ends, this is where the Red, Green, & Blues, colored Ends, of the Wires, goes, remembering that this is ALL only Video. With this method, you still must use the AV, red & White, Audio, Inputs to get the "Sound" into the unit
First you need to know if your PC can output to a TV. Then you need to get the adapter & cables that connect the PC to the TV. Then you need the correct TV drivers installed for your video card. When they are all installed, you need to "Enable" that Monitors, the TV's, Desktop. You need to set either a "Cloned" display or "Spanned, Extended Desktop". Go to "Display Settings" Now ensure the TV/Monitor connected has the correct input/output display settings. Adjust the screens resolution via the resoloution "Slider", it is best to start with, 800x600 32 bit color. or even lower. and once working OK, THEN increase to max resolution, your TV can handle, find out from manual. Once it is all connected up. It should all just work great. Now, from then on, &, to get it to work every-time, the process is. Turn everything OFF. Connect the leads between PC & TV, Turn the TV, ON. Then, startup the PC up. It should "Detect" that it has TWO "Monitors" ie: One Monitor & One TV/Monitor, & you should see your desktop appear after a bit. Now you have screen 1 & screens 2. Now, if you are using "Cloned" mode, then whatever is displayed on the Master monitor, will be displayed on the TV. If you used Spanned, mode, in this mode, however, you will have to."Drag" the Video window, over to the TV, and it is though, you have one "Big Desktop". Now IF using Nvidia or ATI then BOTH of those have thier OWN, Control Panel, this, all then can make it all a lot easier to do it. So I would suggest that this method be used. But if you get stuck, or just want to do it by hand, then the the "By Hand" method is the only way.There is a great program called MultiMon, this allows great control over dual displays, and is well worth installing.


This above mentioned details will help you to get your external device connected to your television.
Thanks.

How to troubleshoot voltage issues?

You connect your over or refrigerator or tv power cord to electric power outlet.But this units will not work.You assume that problem is with tv or oven or with refrigerator.
But the actual issue is voltage at your place.
The voltage needs to be tested.
Before we can attempt to repair anything at all, there is one thing that one MUST do before anything else is done. Now that is, the making sure that the Power Supply,of the unit, no matter what it is, has the correct Voltages, coming into it, and more importantly, coming OUT of it. This is absolutely imperative, as, IF these Voltages are NOT correct then NOTHING will work, properly at all. So we must measure these voltages with a Volt Meter. or a Multimeter set to DC Volts. ( Always use a good quality meter, as if your meter is bad, so are your readings, and we can need to read to within, +/- 0.1 Volts). All Voltage measurements are made with reference to ground. Meaning we clip, our Black, Minus, Lead onto the Earth, or Chassis, or Negative (-) "Rail" of the Power Supply. Now with the Red lead, we can now, measure these Voltages. Now sometimes, the Voltage of each Output is annotated,or written, onto the PCB, that will indicate the Voltage of that output. However most usually they are NOT, so in this case we MUST have a manual to tell us. Now this manual is called a "Service Manual" or sometimes a "Repair Manual" This manual, is absolutely vital, so much so, that it can be near impossible, to do without it. To Order ANY "Bits" you need the parts, "Part Number" a Number that "Identifies" it to the Factory, so we/they know what it exactly is. Without that number you simply cannot get the correct parts. Also too, apart from having "Troubleshooting" step through's, it also has our Voltages. When we measure these Voltages they are 100% EXACT, so IF the Voltage you measure, except for a few rare exceptions, the "Rail" that is NOT at the correct voltage is the one, that the "Fault/Cause" is "ON". Therefore we can now work outwards from the Power Supply, looking for the cause of that problem. Now if the Voltage is Lower than specified, we are invariably looking for a "Short", something has "Faulted" and is "Dragging" the Power Rail down to earth. possibly a Capacitor, or Diode, or an IC. Now if the "Rail" is "Higher" than the specified Voltage then the fault we are looking for is usually some sort of "Open Circuit" possibly a Diode, or Resistor, that has changed it's "Value", due to heat or stress. Now knowing this, and knowing that, the Power Supply is the FIRST & ONLY place to start you troubleshooting and repair from. You now have a MUCH better chance of a "Fix". 


This above mentioned details will help you to troubleshoot voltage issues.

How to troubleshoot LCD, Plasma, CRT TV ?

This basic troubleshooting tips/procedure for
LCD, PLASMA, CRT TV WILL HELP YOU OUT.

•Define Look at the symptom carefully and determine what circuits could be causing the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check for possible overheated components. Capacitors will sometimes leak dielectric material and give off a distinct odor. Frequency of power supplies will change with the load, or listen for say a relay closing etc. Observation of the front Power LED may give some clues.

•Localize After carefully checking the symptom and determining the circuits to be checked and after giving a thorough examination using your senses the first check should always be the DC Supply Voltages to those circuits under test. Always confirm the supplies are not only the proper level but be sure they are noise free. If the supplies are missing check the resistance for possible short circuits.

•Isolate To further isolate the failure, check for the proper waveforms with the Oscilloscope to make a final determination of the failure. Look for correct Amplitude Phasing and Timing of the signals also check for the proper Duty Cycle of the signals. Sometimes“glitches” or “road bumps” will be an indication of an imminent failure.

•Correct The final step is to correct the problem. Be careful of ESD and make sure to check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test before returning the product back to the Customer.


This basic details will help you to confirm the problem, before going for manually repairing it or getting it repaired at professional tv repair center.

How to connect surround sound speakers on LCD TV?

Its simple.The surround sound speakers require an "Interconnection" box, that is a box with Jacks that the Red & White stereo audio plug into, on one side, and the 3 SS speakers plug into the "Other side" as it were. Usually with SS there is  Rear, Front and Sub Woofer, as this means 3 sets of speakers must mate with the 2 outputs from the TV etc. So the "Line Out" stereo output from the TV, which are usually the Red & White, is the output to the interconnection box, from there it feeds into the SS decoder, some plug directly into the decoder itself, and don't use an interconnect box, but it's all the same in the end. The stereo output is fed into the SS decoder, and then SS signal is extracted from the sign in, and routed out to the appropriate speakers.

Connecting wires as per this above details will help you to get sound from surround sound speakers.

This will help.