Question about Vizio VA19LHDTV10T 19 in. LCD TV
I have used my multimeter to test the circuits and I think it is the IC - Integrated Circuit EA1530A. I have not worked on t.v.s before or anything other electronics, besides installing car and home stereo. I do not know how to replace the IC or whether it is the only problem. Please help an electronics fixing noob. Here is the readings I got from the multimeter. Main Board# 715T3288-4 Part# CBCBPF82GKZ3 Power Supply Board# 715T2906-4 Part# PWTV8C21ASA1 R907: 167.7 DCV Q901: G-D: 1 Sec of Continuity, G-S: No Continuity, D-S: 1 Sec of Continuity R915: 2.4omhs R910: 166.2 DCV C920: 0.5 DCV IC901 TEA1530A Pins: 1: 0.5 DCV 2: 0 DCV 3: 1.3 DCV 4: 0 DCV 5: 0.1 DCV 6: 0.6 DCV 7: 0-183 all over the place DCV 8:166 DCV IC901 TEA1530A Pins #2 Pin as Ground: 1: 0.5 DCV 3: 1.3 DCV 4: 0 DCV 5: 0.1 DCV 6: 0.7 DCV 7: 0-180 all over the place DCV 8: 166.4 DCV Transformer(Top to Bottom): Left Side(Hot Side): 1: 167.1 DCV 2: 167.2 DCV 3: 167.5 DCV 4: 0 DCV 5: 0 DCV Right Side(Cold Side): 1: 0 DCV 2: 0 DCV 3: 0 DCV 4: 0 DCV 5: 0 DCV Connector: BL - ON/OFF Bright: 0 DCV 5v: 0 5v: 0 12v: 0 12v: 0 Standby: 0-183 DCV Jumped all over the place. Thank you for your time.
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Posted on Jan 02, 2017
SOURCE: VIZIO L37
If anything, try taking it to a tv repair shop and see if they can find something wrong with it by looking at it which I am physically unable to do online. See if they can look at it free and tell them what you have replaced but I don't know what else without looking at it myself. I hope you get it working.
I doubt you can get a free inspection of it but you can try. Possibly let them know how much money you have spent already and maybe they will give a little leeway. Good luck.
Posted on Apr 02, 2008
You will have to isolate the main board and Inverters.
Unplug the inverters and turn on the set.
If it "turns on" then try re-connecting each inverter seperately to see if only one is causing the problem.
Posted on Mar 07, 2009
It can be main board, T-CON, or LCD panel. I would try reseating the ribbon cables between the T-CON and the LCD panel first.Unless you have service manual and scope to look at the signals it will be difficult to be 100% for sure as to which board is bad, the repair guy will more likely to do board swapping, starting with the T-CON board.
Please see my basic troubleshooting guide here:
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Please post back what you fin
Posted on Oct 29, 2010
Logic Control D Board got nothing to do with this problem. This is your main power supply gone bad(usually not the sub power supply). I just repaired my VIZIO by replacing main power supply. Just remove back cover and your board will be right in the middle of the screen. Just get board part/serial # and google it. My best price was through eBay(around $100). Everything is fine now.
Posted on Feb 07, 2011
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Without a Sams Photofact or a service manual I would go directly to the Power IC which is the largest Integrated Circuit mounted to a large heat sink. If you see any fuses they are probably for the power supply since any fused circuit on the speaker output would be ineffective because the IC would be damaged before the fuse would blow, but you need to check them anyway. Since the short was at the speaker output your problem should be at the final stage of amplification, which is the Power Amp IC. Prior to the early 70's you would have transistors mounted to a heat sink which could be individually checked and replaced. Then manufactures started to use the Power Amp IC which are more costly but eliminate having to find matched pair transistors. All you can check on the Power Amp IC is if you have an input using an oscilloscope or signal tracer and the power to the IC. If you have an input signal and power to the device with no output, I would replace the IC. Unless you have a test circuit for the IC you cannot test it completely unless you have a device like a Huntron Tracker or build a test circuit using a signal generator and a power supply to measure the gain of the IC with an oscilloscope. Short of ordering a service manual this is a good place to start.
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