I try to solve my tv by my self, so can u give me solution of this.
my TV is JVC 21" i forgot the exact model... the problem is vertical out. i try to replace the vertical ic and i solve the problem. but i found out that the output.. we have 1 inch black color at upper and lower. the picture is good and sound except the 1inch color at the upper and lower.
can u give me a solution of this...
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Re: JVC Vertical Problem
You need to adjust the vertical height in the Service menu.Press the SLEEP TIMER key and set the SLEEP TIMER for
Then press the DISPLAY key and VIDEO STATUS key of
the remote control unit at the same time to enter the Service menu.In SERVICE MENU, press the FUNCTION ▼/▲ key to
select any of the SUB MENU items.
(The letters of the selected items are displayed in yellow.)You want #2 DEF - go to sub-menu and look for the height adj.
FUNCTION / key
Setting (adjust) the SETTING VALUE of the SETTING ITEM.
When the key is released the SETTING VALUE will be stored
Returns to the previous screen.
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First, You should to replace by original part, then you should check the voltages on power supply, and check the voltage for vertical IC based on datasheet, also check the voltages on vertical section including yoke and last you should check the ESR capacitors on vertical section.
Just check the supply voltage input to the vertical IC. If it is more than normal, this type of fault can occur. Just compare this voltage . The TV schematic will help you to find this detail. Check whether the IC is firmly screwed on to its metal heat sink.
Yes.This tv problems it is pretty easily repair,tv have a cold soldering in a vertical IC or around that area.But must have a soldering iron and a roll of solders and know and have some basic soldering skills.Take the tv aparts and turn it on take the plastic end of a screw driver tapping arond a vertical IC or around that area.Find out the vertical IC or around that area.Turn the tv off and resolders that vertical IC or that area,will solved this problems.Or take it to the tvs shops tell them the problems.If they're give u fairly priced for a job.Like about $25-$35 maxs.
Your TVs power supply regulator section has got some trouble with it, that is why power indicator doesn't light up. You have purchased it only fourteen days back, surely there will be warranty for it. Do not open the TV. The company will give no concession if the set is opened. Send it to the authorised service center and get it repaired. Some power supply faults may fatal, and may have to spend more. Since your TV is a new model, spare part availability in the open market may be difficult. Send it to them and let them do the work. OK.
vertical output ic needs to be resoldered. careful leaving that bright line displayed on the screen as this will cause a permanent phosphor burn into the tube. this can not be corrected once burned unless you replace the tube. mch
Vertical linearity is more of a DCV bias issue rather than feedback or AC coupling. Hence it would be more apt to suspect resistors rather than capacitors. Of course, it is also possible that the large IC that drives the Vertical output maybe at fault (least likely) but often would have trimpots for adjustment. Most current designs do away with trimpots and rely on self correcting (feedback loop) which is simply a resistor in the 100k range. In certain instances, it could be a thermistor or resistor or diode limiter attached to the yoke itself.
Best would be to use a service manual or at the very least a schematic diagram with voltage readings and compare actual on PCB against schematic.
If you could post back the make & model or preferably the chassis number of the TV, might be able to comment back known common vertical issues.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
civilman, the first set has either no high voltage or is collapsed vertically, until someone checks for high voltage there is no concrete answer, the AV27730 is vertical collapse from your description, either the voltage to the vertical IC is missing or the vertical IC has failed, not a big deal cost-wise, hope this answers your questions, if not e-mail me back, good luck, BMW Rider