HOME ELECTRONICS APPLIANCES REPAIR AND SERVICING

·       TECHNICAL DIFFICULTIES IN WASHING MACHINE

 

·       NO DISPLAY AT ALL

·       DISPLAY OK BUT CANNOT RESPOND ANY KEYS

·       STARTS KEYS OKAY BUT CANNOT ROTATE MOTOR

·       ERROR DISPLAY

·       WATER LIKING

·       RUNNING BUT Can’t DRAIN WATER / END UP ERROR

·       NOISE WHILE SPINNING

·       SMELLING WHILE SPINNING

·       BREAK DOWN WHEN UNDER FULL LOAD/ OPERATING

·       NO ERROR WHICHEVER WAY BUT SILL NOT FUCTIONING AT ALL

·       MOVING AND LOUD NOISE WHILE SPINNING

 

                      TROUBLE SHOOTING COMPONENTS

·       DRAIN PUMP

·       ELECTRONIC PANEL

·       LID SWITCH

·       PRESSURE SWITCH

·       INLET WATER VALVE

·       MOTOR / SPAK OR SMELLING

·       BEARING

·       WATER DRAM

·       INLET POWER FILLTER

·       REFRIGERATORS / DEEP FREEZERS PROBLEMS

·       NO SPLAY AT ALL

·       LIGHT OK AND STILL NOTHING WORKING

·       FREEZER OK BUT FRIDGE NOT COOLING

·       NO COOLING BOTH FREEZER AND FRIDGE

·       RUNNING TOO LONG

·       HARMING CCOMRESSOR THEN OVER HEATING

·       COMPRESSOR ON AND OFF

·       SMELLING AFTER RUNNING TOO LONG

·       FREEZING / FROST BUILD UP

·       NO POWER

 

TROUBLE SHOOTING/ COMPONENTS

·       POWER CORD

·       THERMOSTANT

·       TIMER

·       DEFROST

·       HEATER

·       DEFROST SENSOR

·       DEFROST THERMISTOR

·       COMPRESSOR

·       RELAY

·       OVERLOAD

·       EVERPORATOR

·       CONSENSER

·       FILTER

·       ACCUMULATOR

·       COMPRESSOR

 

  ·         MICROWAVES AND TROUBLE SHOOTIMGS

·       No display

·       On and off

·       Malfunctioning display panel keys

·       Running but no warming / heating

·       Bad smell while running

·       Door open then light bulb on and off

·        

 

·       FAULTS PARTS

·       Electronics panel

·       Keys

·       Door switches

·       Magnetrons

·       High voltage transformer

·       Hv capacitors

·       Hv diodes

·       Hv fuse 

  

                                     HOME THEATER AND PROBLES

                                  

·       No display at all

·       Power on but no display

·       No keys responding

·       Display and all function okay. Still no sound

·       Volume maximum. Still Low sound

·       No disk

·       DVD tray keep on closing and ejecting

·       Push power protect

·       On then off/ on and off

·       Distort sound from speakers

·       Some speaker’s active other not

·       TELEVISION AND FUALTS

·      

·       

·       

·      

 no power at all

·       No picture

·       No sound

·       Screen on but no picture

·       Picture ok. no sound

·       Sound ok. No picture

 

  

                                            SONY HOME THEATER AND PROBLES

·       No display at all

·       Power on but no display

·       No keys responding

·       Display and all function okay. Still no sound

·       Volume maximum. Still Low sound

·       No disk

·       DVD tray keep on closing and ejecting

·       Push power protect

·       On then off/ on and off

·       Distort sound from speakers

·       Some speaker’s active other not

·       TELEVISION AND FUALTS

·       No power

·       Power on and still don’t turn on

·       On and off

·       On but still no display

·       No picture

·       No sound

·       Screen on but no picture

·       Picture ok. no sound

·       Sound ok. No picture

 

 

 

                          

 

 

 

 

 

 

FIXED POWER SUPPLY.

 

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·         Electronics Repair Questions & Answers

 

Two Shorted Diodes But Four Replaced

A super market owner across the street came running to my shop and asked for a 1.5 amp fuse. He explained that the electronic scale that they have at the shop went dead. He said he will replace the fuse and let me know. Soon enough I found out that the fuse he installed gone open again which confirms my fear that the power supply in that device was shorted and needed repair.

The scale is too big to fit in one shot so this is the display of the scale and the next photo is the rest of the

 scale.

It was not the best clean electronic scale that I ever worked on; it was dirty and needed a lot of cleaning. The repair is my job and the cleaning is the owner part.

 

So let us repair the power supply inside this device

It is a 24 volt power supply with 3 amps rating. I was not thinking of repairing it when I first opened the power supply. I thought of ordering a new power supply. The owner did not want to wait for the new part to come so he told me to go ahead and get it fixed.

If you look closely to the fuse, you would see or think it was intact but in fact when testing with the multi meter, the fuse was open. Since the fuse was open, the logic and common sense is to check first of all the bridge rectifier.

As expected, one of the diodes was reading a dead short and the other diode was giving me reading both ways. Four of the diodes of the bridge rectifier were replaced.

I saw this burnt mark on the metal holding the power supply board but discovered later on after testing the Mosfet that this burnt mark was old and other technician replaced the shorted Mosfet with a new one.

After checking all the parts on that power supply board, I determined to use the light bulb trick to find out if there is still shorted part that I may have missed while testing

It was confirmed that the power supply board is free of any shorted component and this is the time to put the fuse back and get the machine working again