Thursday, March 27, 2014

Online Scientific Calculator

eCalc - Online Scientific Calculator with integrated Unit
Converter from our friends at EEWeb.

Click here to read more about the eCalc, use the eCalc and download it as well.

http://www.eeweb.com/

Also please make sure to visit   www.eeweb.com

Wednesday, March 26, 2014

Samsung HPS4253 no power, PSPF391A01A / BN96-03252A power supply repair

Repair service for Samsung PSPF391A01A / BN96-03252A power supply which is used in the following Samsung Models,

     HPR4272X/XAA, HPS4233X/XAA, HPS4233X/XAC SD03, HPS4233X/XAC SG04, HPS4233X/XAC SD01, HPS4233X/XAC SG02, HPS4253X/XAA, HPS4253X/XAC SD01, HPS4253X/XAC 0001, HPS4253X/XAC SD03, HPS4253X/XAC SG02, HPS4253X/XAC SG04, HPS4273X/XAA and SPS4243X/XAA



Typical failure symptoms that indicate power supply failure: No power. Totally dead, no standby LED and does not respond to buttons being pressed. TV shuts down immediately after being turned on. TV makes a clicking sound.



PSPF391A01A / BN96-03252A power supply Professional Repair: If you are interested in having a PSPF391A01A / BN96-03252A power supply or any other power supply repaired professionally then you may be interested in our mail in repair servicesWe can do the repair on PSPF391A01A / BN96-03252A power supplies for $50 plus the cost of return shipping and handling. Click here to see our mail in repair service page.




Thank you for visiting our blog and remember to also visit www.preher-tech.com

Monday, February 24, 2014

Sony BRAVIA KDL40EX600, no power, APS-272(CH) power supply repair

Sony BRAVIA KDL-40EX600

Failure symptom: No power

Upon diagnosis of the power supply I found that  power MOSFETs Q6101 and Q6102 were shorted between source,drain and gate and fusible resistor R6536 was open. Power MOSFETs Q6101 and Q6102 were 2SK4096 , 8 amp, 500 volt, N channel MOSFETs and were replaced with substitutes, FQPF9N50CF 9 amp, 500 volt MOSFETs. Resistor R6536 was a 1/2 watt 0.47 ohm fusible resistor.



After replacing the faulty components and installing the power supply the TV turned on and was completely functional.

 KDL-55EX500, APS-272(CH) Professional Repair:
If you are interested in having an APS-272(CH) or any other power supply repaired professionally then you may be interested in our mail in repair servicesWe can do the repair on APS-272(CH) power supplies for $40 plus the cost of return shipping and handling. Click here to see our mail in repair service page.



Thank you for visiting our blog and remember to also visit www.preher-tech.com

Sony BRAVIA KDL-55EX500, no power, APS-256(CH) power supply repair

Sony BRAVIA KDL-55EX500

Failure symptom: No power

Upon diagnosis of the power supply I found that  power MOSFETs Q6304 and Q6305 were shorted between source and drain and fusible resistor R6350 was open. Power MOSFETs Q6304 and Q6305 were 2SK4096 , 8 amp, 500 volt, N channel MOSFETs and were replaced with substitutes, FQPF9N50CF 9 amp, 500 volt MOSFETs. Resistor R6350 was a 1/2 watt 0.47 ohm fusible resistor.


After replacing the faulty components and installing the power supply the TV turned on and was completely functional.

 KDL-55EX500, APS-256(CH) Professional Repair:
If you are interested in having an APS-256(CH) or any other power supply repaired professionally then you may be interested in our mail in repair services. We can do the repair on APS-256(CH) power supplies for $40 plus the cost of return shipping and handling. Click here to see our mail in repair service page.



Thank you for visiting our blog and remember to also visit www.preher-tech.com