How-To: Diagnose and Replace T-Con Boards

All video tutorial inputs received by the video process circuits are completed on the frame-by-frame basis. The video recording casings are scaled and changed into 8 to 10 tad RGB information. It is almost impossible for the video process circuit to result in a problem on a particular section of the screen. Failures upon this plank show up as distortions, color level shifts, video level noise or shifts that involves the complete picture. The T-Con can generate symptoms that look like video process related, however the video process circuit cannot produce the symptoms of a failed T-Con board circuit.

T-CON FAILURES

Failures in the timing control circuits of the T-Con can produce symptoms of zero training video or generate lines and habits that always cover all or a considerable area of the screen. Deciding if the T-Con is the reason for a ‘No Training video’ condition is somewhat more challenging since there are no signs on the display screen to analyze. Many of the Sony TV models over the last few years will discover a T-Con that has completely failed. The communications data between your video process circuits and the T-Con will cease to communicate, iif the T-Con fails completely. This may cause it to turn off and screen a diagnostic code, indicating failing of the T-Con. Not this feature be got by all framework designs which is not entirely on aged models. The normal scenario when this failure arises is ideal for the technician to bring a video process board to the repair location. It is usually safe to assume that the challenge lies on the T-Con board, if the substitute video plank dos not provide a solution to the condition since it is highly improbable that a replacing mother board with the same inability was received. One technique to check on most T-Cons for features is to release the LVDS connection at the T-Con while product is fired up. Deal with the LVDS connection carefully and become certain release a the lock tabs completely. Gently rock the cable in and from the connector while observing the screen for just about any response. With regards to the framework, the symptoms of the display screen may be mild white flashes, intermittent coloured lines, or a display screen filled with arbitrary patterns. The essential idea here is to provoke some type of response on the display. Another helpful procedure is to rapidly heat and/cool the T-Con with a heat devices or circuit coolant watching for patterns appear on the screen.

LVDS CABLE FAILURES

Although the condition with LVDS wire or connectors can make symptoms of T-Con failures this usually is commonly intermittent and wiggling of the connectors will most likely provoke an alteration in the indication on the display screen. LVDS cable connection and connectors have grown to be somewhat powerful within the last few years. Technicians who damage them cause most problems and this is generally quite oblivious after close examination.

PANEL FAILURES

Some LCD -panel failures could fault for T-Con table issues possibly. Other than harm to the LCD glass, most panel failures are isolated to a specific section of the screen. Because the T-Con disperses the pixel data to sets of brand and column drive IC’s situated on the exterior sides of the -panel, it is improbable that several of the IC’s would are unsuccessful at the same time. Multiple columns of struck on or therefore trapped off pixels are, much more likely to be the mistake of the T-Con circuits. Exactly the same applies to an individual row of lit or unlit pixels. The T-Con just can’t minimize out an individual type of information.

T-CON SWAP

In most cases, replacement unit of the T-Con plank will be relatively self-explanatory. In some full case, the other boards may need to be loosened or removed to permit usage of the mounting screws and clearance to eliminate the T-Con board. The presssing problem of most matter is monitoring heat copy pads, stand insulators and offs. The T-Con is heavily shielded and it is straightforward to have a number of of the components accidentally fallout of the assembly when removing. T-Con assemblies that use multiple warmth copy pads must be removed gradually and every look at must be produced to keep carefully the shield and circuit table together because they are removed from the machine. Look for any service bulletins regarding the model and -panel design which contain the subject rest of ‘T-Con temperature copy pad locations’ for pictures showing the correct location of the components. This web site itself has protected disassembly procedure for some model LCD Tv sets, here. Yank up older articles here, or start to see the site in Timeslide option, which is often seen by the drop down at the very top left part of the screen window. It’ll easily make search the. Take away the screw from the LVDS cable television ground strap therefore the wire can be shifted away. Unplug the connection to inverter mother board and remove funnel from the retainer. Remove all screws obtaining the plank sub-chassis to the -panel. Pull the top of the board toward you and allow access to the bottom screws securing T-Con downward. The positioning of screws, and disassembly method can vary greatly set to set.

Carefully unpeel the conductive tape from the most notable bracket taking health care not to rip them. Leave the tape attacked to the T-Con shield. Take away the top bracket within the gate and source driver’s components. This allows access to the top flat cable connectors, if any. Carefully lift up the locking tabs obtaining the level cords. Leave cables mounted on the T-Con and shield assembly. The T-Con board will produce an insulating pad between it and the LCD panel that may cause the board to stick. Very little effort must release it. The target here is to eliminate the mother board and shield jointly to be able to avoid dropping high temperature copy pads and insulators located between your leading of the mother board and the shield. If successful, both components should stay mutually as protected. Note the spaces installed on the backside of the board. These should be used in the replacement panel. Lift the circuit panel upwards gradually while watching the positioning of heat insulating and copy pads. Generally heat transfer pad will stay mounted on their appropriate ICs and the insulating pads will be struck to the shield. If anything comes off, use the instructions to come back them with their proper position. Copy all warmth and insulating pads combined with the smooth wires to the substitute mother board. After the components have been used in leading of the circuit board, attach the shield and flip the assembly. Copy any spacers or insulating pads to the alternative bard. Secure the T-Con panel to the shield with electric tape briefly. This can help in stopping movements of the circuit bard while installing the assembly back to the LCD panel. After the T-Con assemblage is guaranteed to the -panel, put and lock the chiseled cables. Plug in every connector and secure the table sub chassis. Remember about the line funnel that was taken off its retainer.