I think i have got what you want to say. i was wondering if i can do this job of replacing the parts around the deflecting circuit myself or should take it to a technician.i am also thinking about getting a new monitor and dumping this all together. whats your take?
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Re: Thanks for help
Of course I'd go for broke, I'm a tech. Anything and everything could be repaired, there is just a "but" always somewhere.
If you are to consider the repair cost if you would avail the service of a tech, purchase of parts (if readily available), downtime, then economics and logic would dictate purchase of a new one;
If you are basing on a DIYers challenge, then it would be repair as long as possible. I used to have a Hitachi 21 inch that I have to increase the heater voltage so as to compensate for out of focus problem. I only stopped using it when the wife cleaned the yellow casing (used to be white) and spilled cleaning fluid inside.
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The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
It is either the power supply or the deflection circuit.
If you can read electronic circuits and know how to use a DVM. Check the power supply voltages and the deflection circuit for any short..
Best of luck. www.aaatvservice.com
Sorry to read about your problem, I hope this helps you out.
well that sound you head, sound like some parts overloading in on the power supply card. and I really think, they do not provide repair for that unit any more...... I guess the real encouragement, you get to buy some new great displays..
I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck
The screen is blank with no raster at all. There are indications that the channel numbers are changing in the display. This indicates that some of the low voltages are present but these may be derived from the standby supply. Assuming there is no deflection and no High Voltage, you either have a low voltage power supply problem, bad start up circuit, or bad horizontal output transistor (HOT) or other bad parts in the horizontal deflection.
Check for bad fuses.
(If you have High Voltage as indicated by static electricity on the front of the screen and you hear the high pitched whine of the horizontal deflection when it is turned on, then the following does not apply).
Use an ohmmeter to test the HOT for shorts. If it is bad, look for open fusable resistors or other fuses you did not catch. Assuming it is good, measure the voltage on the collector-emitter of the HOT (this is safe if there is no deflection). You should see the B+ - probably between 100 and 150 V. If there is no voltage, you have a low voltage power supply problem and/or you have not found all the bad/open parts. If there is voltage and no deflection (no high pitched whine and no HIGH VOLTAGE), you probably have a start up problem - all TVs need some kind of circuit to kick start the horizontal deflection until the auxiliary power outputs of the flyback are available. Some Zeniths use a simple multivibrator for this - a couple of transistors. Others power the horizontal osc. IC from a special line-derived voltage. The multivibrator type are sometimes designed to fail if someone keeps turning the set on and off (like kids playing) since the power rating is inadequate. Test the transistors if it is that type with an ohmmeter. If one is shorted, you have a problem. The usual way a TV service person would test for start up problems is to inject a signal to the base of the HOT of about 15.75 kHz. If the TV then starts and runs once this signal is removed, the diagnosis is confirmed. This is risky - you can blow things up if not careful (including yourself).
If you hear the high pitched whine of the deflection and/or feel some static on the scree, confirm that the horizontal deflection and high voltage are working by adjusting the SCREEN control (probably on the flyback). If you can get a raster then your problem is probably in the video or chroma circuits, not the deflection or high voltage.
Hi guys I've got XA7-19i 900p and I had the same problem But I've got it repaired myself. This is common issue and problem is in the power supply unit. I have changed 6 capacitors 470uF 25v and 1 capacitor 220uF 25v. It will definitely help! Try to google it you will find instruction how to do it.
You probably have a sacrificial diode that blew out to save the rest of the monitor from further damage. The manufacturer should replace it with a refurbished one at little and sometimes no charge (comparatively speaking).
Sound like the vertical deflection circuit is defrctive. Check for cold solder around the vertical IC, Check the Diode and cap that supply power to the Vertical IC. If it still do not work, change out/ replace the virtical IC.
I recently came accross one of these monitors (Planar PE191M) with the identical issue. The resolution was to replace the two 470ufd 25V capacitors that are located on the main power board. The main power board also contains the audio circuit and more importantly the inverter circuit that drives the CCFL backlighting. The suspect caps were identified using an ESR meter; if you happen to have one of these meters you can confirm this is the issue with your unit(s), alternatively you can just replace the two capacitors and see if it resolves your issue. Hope this info helps someone out there.