Question about Instek GOS620FG Analog 20MHz Oscilloscope

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MODEL NO: EZ CRO OS 5020 HORIZONTAL SECTION FUSE 150V 500MA BORN OUT, EVEN IT IS REPLACED ALSO BURNING AND NEAREST REGULATOR AND TRONSFORMER IN GOOD CONDITION. HOW CAN I RECTIFY THIS FUSE BURNING ALL THE TIME

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Check the capacitors in the input bridge.

Posted on Jun 07, 2010

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Why doesn't it turn on?


Fault to the main power supply regulator section. 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. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/

Feb 09, 2016 | Emerson LC320EM2 32" LCD HD Television

1 Answer

Samsung television smps secondary voltage 150v regulation is not OK please help


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. Surf the site with patience. 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.
Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Oct 18, 2015 | Samsung Televison & Video

2 Answers

I have a bush tv its got sound but no picture


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. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Apr 08, 2015 | Bush Televison & Video

2 Answers

NO POWER AT ALL


Hi
our tv set need to be serviced. Here are some tips:
1. Open main fuse. The fuse is clean but interrupted. You can try replacing it with one o the same value.
2. Fuse Blown or blackened. Short in the rectifier bridge or in the switching transistor. Out of the power supply: supply line rectifier (100/150V) shorted.

Sully

Sep 29, 2013 | Televison & Video

1 Answer

Generac portable generator over voltage even with new control board and regulator


is engine running at 3600 to 3700 rpm at full load. most small engines run at this speed.you can buy a small tach on ebay TINY TACH.. you have to know what the engine speed is

Mar 04, 2013 | Electrical Supplies

1 Answer

POWER SECTION PROBLEM EHT NOT CHARGING


It might not be a power supply regulator section problem. Must be of horizontal output section problem. If you are not familiar with electronics, do not attempt to repair. Whether you suffer fatal electrical shock! Instead, contact the nearest service center or contact any experienced service technician.

Feb 18, 2013 | Televison & Video

1 Answer

VWM - 360 Model / Keeps blowing the 2A / 250 V Fuse the moment the plug goes in the outlets.


Fuses keep blowing because a semi-conductor device is acting like a piece of wire. Look in the power supply section for transistors or voltage regulators or anything like that. It might be even damaged or burned.

Apr 14, 2011 | Sanyo Televison & Video

1 Answer

TV made a couple of loud snapping sounds and picture went out but still had sound. I unplugged the TV and plugged it back in now there is nothing. There's a "fuse"-(NL8001) that glows for a second then...


good day friend. check for an open resistor with high wattage and low resistance. explain how that nl8001 looks. does it have colored bands on it. give me a description of it. does it look burned. check your dc voltage on your main filter cap. it should be between 150v to 160ish v look in the horizontal section. check the horizontal output transistor, to see if there is about the same voltage as the main filter cap. thank you and please give me a positive rate.

Nov 07, 2009 | Sony KP-53HS10 TV

1 Answer

Tv wont turn on


try to plug in again...if there's no reaction at all, then the power suply section may checked...(I.C. regulator str.... followed the horizontal output transistor or some of the zener diodes regulator or broken PCB line

Jul 30, 2009 | Sony KV-27S42 27" TV

1 Answer

MONITOR FAULT


check A/C voltage,fuse,maincap220/450v,bridge rectifire,reg.IC,FET.
check O/P sec. Voltages 5v,12v,65v,80v,150v Voltages may be variations on make.
Combo section 80vdc,60vdc
processor 5v,Vertical sec+12v,-12vdc
filament sup.6.3vA/C
Horizontal sec,H O/p 100v/120v
check dries
and pt

Aug 29, 2008 | Computers & Internet

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