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Onida tv model 21 IQ04, power supply smps transistor blows off

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Onida black tv enter password

i want enter password for Onida TV for all models

Posted on Jul 04, 2009

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SOURCE: Akai 25

try to check its high voltage section for axed HOT or flyback. Also check its regulator. Maybe start up resistor or check the chopper circuit. You should at least have an standby voltage on the secondary side.

Posted on Oct 28, 2009

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SOURCE: LaserJet 5550dtn Printer: blows mains fuse and power supply board fuse and b...

The fuse blows all time on High Voltage Poewr Supply, on HP Color Laserjet 5550dn,

Posted on Jul 28, 2010

caroldon
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SOURCE: hitachi TV model C21-rm25s-192 power

The SMPS - power supply is critical of the generated frequency , load trip and high voltage. So if the power transistor has blown then you must check the reason for the failure before the new one is put into the circuit. Check the DC voltage, check the rectifier, storage capacitor and the frequency oscillator. check for short in the SM tranformer , feedback optocouplers or a possible short in the main circuit.
Please check the link below for help:


http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Posted on Feb 08, 2011

gopakumarg43
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SOURCE: Onida 21 flat tv h output transistor over hit and after ten minutes blow of

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Type in this key phrase " my service table today " in the search box at the top right of the the home page, to get gathered some pages which has the details of practical experiences of the author of that site. The search result might display about 20 Nos of related posts. Press the "All posts" at the bottom of the list, then you can select them one by one.

Posted on Jan 13, 2017

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1 Answer

Blown fuse in tv power supply


Check all the other components; diodes, transistors etc:- at the main power regulator stage circuit for any damage. If the fuse should blow, there should be a short circuit with the related power regulator [SMPS] circuit. If you wish to get more details, check the site linked here. Surf the site in "MOSAIC" view.
http://electronicshelponline.blogspot.com/

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Hitachi TV model C21-rm25s-192 power supply transistor and fuse blow off just after replacement. other components of the power supply seem to be ok. what should I do?


The SMPS - power supply is critical of the generated frequency , load trip and high voltage. So if the power transistor has blown then you must check the reason for the failure before the new one is put into the circuit. Check the DC voltage, check the rectifier, storage capacitor and the frequency oscillator. check for short in the SM tranformer , feedback optocouplers or a possible short in the main circuit.
Please check the link below for help:


http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

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