Question about Televison & Video
My samsung LA32R71BD is making a high pitched sound from the power supply area of the TV when the TV is in standby mode. I've done some googling on this and have found the problem to be the power supply choke coil needs replacing. I have very little electronics experience and can solder very basic things only. Which choke coil would I need to buy to replace the faulty one? The serial number of the board on the back of the TV is BN64-00445F. Is it an easy job to do for someone with little experience? Is there any danger if I just forget about it and continue using the TV anyway? Will it have a flow on effect and fry the rest of the TV if it doesn't get fixed?
Its going to be a choke (coil) or a small transformer. It can be pinpointed in many cases with in your case set off and back off---use a plastic probe and press on individual coils and transformers (Google will if you search with Photo of..........) show you what they look for, if you narrow it to one part hot glue on a transformer where the wire is or super glue on a coil wires where wrapped can cure this.
No danger to my experience but can be very annoying---Women seem to be better at hearing that sound than men.
Of course if you Google the model number with PARTS you will come up with one of several venders who list all boards by model number and sell them---Power supply is often listed as SMPS.
Posted on Dec 08, 2012
Testimonial: "ok thx I'll give it a go"
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Posted on Jan 02, 2017
The cap's will look puffed. there are usually several on the power supply that are bad. Yes they have to be soldered in and they have polarity so you have to get them in right.
Posted on Oct 23, 2009
Testimonial: "clearly very knowledgeable. FYI, I found a thread on the Samsung forum on CNet. This appears to be a very common problem, Samsung offered to fix 50 NC"
Yes, it is very easy to repair. Solder iron wattage should be at least 300 w.
The PSB is the center Board (towards left) after you remove the back off the TV. Remove the shield that covers the Boards and remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.
Good Luck, big IRISH.
Posted on Dec 28, 2009
Testimonial: "Great fix"
You'll find some Samsung power supply boards here : http://www.usefulparts.com/index.php?main_page=index&manufacturers_id=11&sort=20a&filter_id=98&alpha_filter_id=0
but you have to open your TV first and find out model number
Posted on May 10, 2010
SOURCE: The TV doesn't power on.
The problem might be on your power supply section.
1. Check for open resistor or maybe a shorted transistor. Use a multimeter
2. Also check for a leak capacitor
Is the fuse you replace is still o.k? at times the blown fuse indicates that there is a short circuit on your t.v. Maybe the noise you hear is also because of a short circuit. Be careful in replacing fuse, always replace same type for the protection of you t.v
Hope this may help you
Posted on Aug 20, 2011
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