Tip & How-To about Televison & Video

How to measure the voltage on TV

Voltage measured on DC scale, black cable multitester / avometer put on a negative path or can be slipped on the silver wire in the tube that is not disposable wrapping.

Next, measure the voltages are available:

  • For 180v voltage can be measured on the positive pin elco (10uf/250v) in PCB RGB tube.stick pin red wire multitester

  • Voltage 110v for TVs 14 "-21" and 130v for 25 "-29" in the B + FlyBack Transformer (FBT), find the path there is elco 100uf/160volt. measure on a positive foot elco.
  • For 12volt voltage, please measure at the foot of the right edge of IC 7812.

  1. For voltage 5V, please measure the right foot of IC 7805.
  2. For voltage 33v, please search at the foot of VT in tuner.
  3. To measure 90v-300v, scale use DCV 250.
  4. To measure the 12v-40v, use a scale of 50 DCV
  5. To measure the voltage of 1V-9v, 10 DCV-scale use.
  6. How to measure the voltage on the yoke and in plyback is;
    • From the yoke horizontal = Fcc 110v DC, 1000 V. AC voltage can be removed with a red plug in output and in use as dB meter.
    • From the yoke pertikal 24 DC current model, except for disposable coupling C = 1 / 2 Fcc. While it could be IC 120V AC (with dB meter)
    • At Fcc FBT kolector; 110v DC, AC voltage = 1000 V..
    • At Fcc FBT filement / heater = 5V-5, 5V AC.
    • In the FBT 20-32k anode voltage V measured with 40kv HV probe is added to the multitester 1000 V. DC.
    • Voltage others depending on model and type of TV. 180v out there (for RGB) directly from the regulators, transformers, Video Amp taken from FBT.
    • There are 24V and 46v vertical FBT, also 12-18V depending on brand and type.
    • Voltage 600 V DC and focus around the screen 400v DC.

    Thus tip n trick from me (AGUS YUSTIARA ), hopefully useful.
for more info , at http://trend2download.blogspot.com


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hi 5800 only vibrate no on



1. By using a scale manually Multitester x1, connect the cables Multitester with positive and negative poles of the Vibra component, if the component is vibrating in a good situation, but if the components do not vibrate Vibra then you need to replace the defective component Vibra.

2. Further examination could be done if the component is not damaged and remained Vibra still using Multitester, connect the cable to the interface component Multiterster Vibra on phone PCB, if there is movement of the needle when it is connected Multitester the path under normal circumstances, otherwise if there is no needle movement means there is a path Multitester end. You can make jumpers system directly from the UI to the component controller IC Vibra. Check also that the positive path from the battery to the Vibra in good condition, if the track is lost then do the path-breaking jumper on you, then the vibration will work again.

exsample image on nokia n95

look
http://1.bp.blogspot.com/_y-JFYukllP4/S4p0DjmWvlI/AAAAAAAACGk/4wjfgVRipqw/s400/vibra%20N95.jpg


Apr 25, 2011 | Nokia 5800 XpressMusic Smartphone

1 Answer

How to tell if the power supply is bad.


You can check if the power supply is bad using a multitester.

Connect the power cord at the back of the power supply and plug it in an AC outlet. Measure the voltage out from the connector. Using the multitester (set it to DC range), insert the black probe to one of the black wire in the peripheral connector of the power supply while the red probe in the yellow wire. Reading should be +12VD. Now, transfer the red probe to the red wire, reading is +5VDC. Reading below this measurement is a clear indication of a bad power supply.
Put some load in it, like connecting a hard drive or a cd rom drive.Try measuring the output voltage again. If voltage out dropped then it is Bad.

Hope this will help you understand.
Thank you for using Fixya.

Jan 08, 2011 | E-Machines Bestec ATX-300-12E Rev. D 300w...

2 Answers

When my computer starts the power light will blink and the fan starts. When the computer first had problems it froze and the fan turned on and wouldnt stop. I also smelt a burnt rubber smell. I read to test the power supply with a tester, is that a voltmeter you are refering to?


Yes the voltmeter measures the voltage.
When you power up the computer to test the voltage on the 4 wire connectors.
Test the voltage red and balck wire should read 5 volts.
Test the voltage yellow an black wire should read 12 volts
If the burning smell is from the power supply then most likely a capacitor has blown in the switch mode power supply.
I would advise you purchase a new power supply, do not try and repair it, these mains devices can be dangerous if you don't have knowledge.

Sep 14, 2010 | HP Pavilion a705w PC Desktop

2 Answers

I have a 99 BMW. Head lights have 2 wires, 1


Do have access to a volt meter or an old school 12volt test light? Turn the light on with the light harness loose from the light assy. and test each wire to the frame or the negative post of the battery. The wire that has voltage or will light the light is your 12v pos.You can make a test light using a old 1157 tail light bulb, using 2 wires tape one wire to the base metal and the other, hold on the silver bulb tip with one hand, put one end of the wire on the batt. neg. post and use the other wire to search for the voltage in the light harness, voltage will light the bulb..

Dec 27, 2009 | 1999 BMW 323 Series

1 Answer

only has a -1 on the display


Christoph, Likely you have the meter set to resistance (ohms) and thus, are getting the displayed reading you've described. Also, with the polarity reversed ( positive and negative + / - ) you'll get the negative number displayed in voltage settings.

First off, check to make sure that the battery inside the back of the test meter is new. If your meter has been around for some time, it is likely that the battery should be replaced. Typically it is either a AA or 9 volt battery in most testers.

Once you've replaced the battery, try testing the old battery with the meter set to DC-V and the probes (red & black) in the DC-V connections. Set the measurement scale to the lowest on the DC range and then with the red test lead on the battery's positive end and the black test lead on the battery's negative end, you should be able to get a voltage reading of the old battery.

Now you can check the resistance function (ohms) by setting the meter to the Ohms function at the lowest scale/setting and touch the two leads together. You should get a reading of 0.00 ohms resistance. You might have to zero the setting manually with either a small adjustment wheel on the face of the meter, or with a small set screw on the backside of the meter. (some models have this installed inside the battery compartment also)

Hopefully that's all the issue you've experienced and your meter is now working properly. I hope you find this Very Helpful and best regards!

Nov 02, 2009 | Actron CP7672 Digital Multitester

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