A3 Electronics offers

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A3 Electronics offers more than 25 years of experience in the field of consumer and commercial electronics repair.

Consumer electronics services:

  • Repairs of flat screen TVs and monitors. If your LCD, LED, OLED, Plasma TV or the monitor does not power up, has no picture or sound call us for assistance.
  • We repair and service audio equipment Power Amplifiers, Receivers, Integrated Amplifiers, CD players, DVD players, Pre-amps, EQs, Tube audio, High-End equipment, etc..
  • Equipment set up and Installation. We provide assistance with configuring all of your home audio/video systems such as home theaters, speakers, surveillance systems and more. We can consult you on optimal equipment choices, types of wiring and mounting options.

Commercial electronics:

  • Repair and maintenance of Flat screen TVs and Monitors, Media players, Touch screen units, Kiosks etc.
  • Networking equipment repair (Hardware only)
  • Small to Mid- size Video walls design and installation (including custom mounting hardware), Digital signage for small businesses, etc.
  • Professional Audio and Recording equipment.

Technical support:

  • Difficult faults, Component level PCB repairs, Ports and connectors replacement (DVI, HDMI, and USB)
  • LCD TVs backlight repair-CCFL lamps replacement. LED TVs backlight repair-LED strips repair or replacement
  • BGA rework, re-flow, re-balling for TVs, Receivers, DVD/SACD, Laptops, Desktops, Gaming consoles
  • Odd pieces, appliances control boards, etc.

    Service aria:

           Burlington
           Hamilton
           Niagara Region
           Oakville
           Mississauga
  • Contact us at 289-723-0910 or info@A3Electronics.com

 

RCA LED TV repair. Step by step.

Alex 2 Comments

 

RCA LED TV, Backlight problem and how to repair it. In our case, an older edge lit RLED4250A. The unit came from another repair shop.  The original problem – no picture (no backlight to be exact).  Upon inspection a fault in power supply unit was discovered.  Replacing the defective power supply appeared to rectify the problem, until the moment the technician tried to move the TV. As soon as the unit was lifted up from the bench, backlight went off and came back only when the unit was placed back on the bench. At this point an assumption was made that the TV has a backlight problem and A3 Electronics was asked to step in.

RCA RLED4250A uses TC420F115 LCD assembly. Our experience tells us that there are two possible problems with TC420F115 assembly. One- faulty LED and the other- faulty wiring, both are repairable.

At the customer’s place.

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Removing bezel.

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Peel back protective cover and remove screws from LCD junction board.

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Disconnect ribbons and flip screen over.

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Remove all screws from metal framing then remove metal frame.

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Gently flip junction boards over and tape them to the screen using masking tape.

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Remove LCD and place it on dust free surface.

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It is highly recommended to wear gloves when handling LCD and light guide parts.

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Remove plastic framing to gain access to light guide parts.

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Remove light guide parts.

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Inspect backlight LEDs for electrical and mechanical damage. Inspect wiring for “shorts”.

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In our particular case we had both problems present. After replacing defective LED’s the technician discovered that during assembly process the manufacturer left exposed  wire ends creating a short circuit every time the TV set was moved. “Short” in backlight circuit caused original power supply damage.  Silicon coating solved that problem.

 

Onkyo’s famous “no sound” issue repair.

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Well known and documented problem with Onkyo receivers is when unit powers up but, has no speakers displayed on the front panel and no sound. At this moment it is also impossible to read a version of DSP firmware. Some units will have sound after long warm up and some won’t. In our case it is TX-NR809.

Unit on our bench came from the other repair shop and we will try to help them to repair it.

First, we remove the top cover and perform quick over all check.

onkyo txnr809 Q3001

 

 

 

Next, locate Q3001 chip with DTS logo on it on the digital (HDMI) board. With the heat gun on a low setting (temperature of the chip should never exceed 200C!), warm the chip for one minute applying heat 5 sec on 5 sec off. Let it sit for 15 sec then power up the unit.

If the receiver displays speakers on the front panel and has sound, we found the problem. To resolve it, we will have to re-solder Q3001. For long lasting results, BGA re-balling procedure is necessary.  That’s how it’s done.

Remove Digital board from the unit.

Digital board

 

 

 

 

 

 

Apply kapton tape around the chip.

Kapton

 

 

 

 

 

 

Place the board on BGA rework station and remove the chip.

Rework

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Clean up the board and the chip.

Clean up

 

 

 

 

 

 

Re-ball the chip.

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Place the chip back on the board.

reinstall

 

 

 

 

 

 

Place the board on BGA rework station and solder the chip.

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Clean the board.

Place the board back into the receiver.

Test the receiver.

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Success!!!

This is an example of how BGA rework can save your unit from becoming a boat anchor.

 

 

 

 

 

LED TV Backlight repair services.

Alex 2 Comments
A lot of TV manufacturers claim that in case of LED backlight failure, the entire LCD assembly (Screen assembly) has to be replaced.
At A3 Electronics we have a technology to repair faulty LED backlight   in many cases by replacing
individual LEDs. We will strip your TV’s panel down, find the defective component and replace it.
It is much cheaper than replacing LCD assembly and/or entire LED strips not to mentioning, replacing entire TV set.
Every time somebody tells you “it can’t be done” remember A3 Electronics has the solution!!!!
LED TV Backlight strip

LED TV Backlight strip

We have great success repairing LED backlight for LG, Samsung, Sharp, RCA, Proscan, Seiki and other brands.
Give as a call and we will help!

BGA Rework services.

Alex Leave a comment
We offer BGA rework, reflow, re-balling services.   TV’s main boards and T-cons, HDMI boards in receivers, GPUs and CPUs in gaming consoles and other electronics often fails as a result of stressed soldering joints of BGA chips. Call us 289-7230910 if you need to solve the problem with your electronics.
bga chip

BGA chip

About Us

Alex

A3logo

A3 Electronics offers more than 25 years of experience in the field of consumer and commercial electronics.

Our services include electronics repairs and installations, consulting and maintenance as well as technical support.

Consumer electronics services:

  • Repairs of flat screen TVs and monitors. If your LCD, LED, OLED, Plasma TV or the monitor does not power up, has no picture or sound call us for assistance.
  • We repair and service audio equipment Power Amplifiers, Receivers, Integrated Amplifiers, CD players, DVD players, Pre-amps, EQs, etc.
  • Equipment set up and Installation. We provide assistance with configuring all of your home audio/video systems such as home theaters, speakers, surveillance systems and more. We can consult you on optimal equipment choices, types of wiring and mounting options.

 

Commercial electronics:

  • Repair and maintenance of Flat screen TVs and Monitors, Media players, Touch screen units, Kiosks etc.
  • Networking equipment repair (Hardware only)
  • Small to Mid- size Video walls design and installation (including custom mounting hardware), Digital signage for small businesses, etc.

Technical support:

  • Difficult faults, Component level PCB repairs, Ports and connectors replacement (DVI, HDMI, and USB)
  • LCD TVs backlight repair-CCFL lamps replacement. LED TVs backlight repair-LED strips repair or replacement
  • BGA rework, re-flow, re-balling for TVs, Receivers, DVD/SACD, Laptops, Desktops, Gaming consoles
  • Odd pieces, appliances control boards, etc.