Hello, I have a Sanyo DP32746. I replaced the power supply, but atransformer on the new used board is buzzing. Don't want it to go bad again. Something else causing the boards to fail. Help please.
Hello, I have a Sanyo DP32746. The tv was going into power fail mode so I did some troubleshooting. I narrowed to the power supply board and I bought a used replacement. The tv now is working but the transformer at t605a is buzzing. When I disconnect the inverter connector to the backlights it stops. Can you tell me how to proceed and what the problem might be? My thoughts are the bulbs might be going bad, drawing to much current and that's what might of killed my last board. Btw, the last board did have some bad caps. A little bulging on the tops and they tested out of circuit as just a little less than 20 percent tolerance to their specified values. The inverter connector pins read: pins 1-5= 23.8V, pins 6-11=0V, pin 12=4.9V, pin 13=0V, pin 14=5.8V.
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That problem is usually cause of faulty capacitors on the power supply board..
Just follow this instruction to fix your TV..
1. Open the back cover of your TV. 2. Look at the power supply board..Its normally connected to the power cord.. 3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors.. 4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value.. 5. Some of the capacitors not bulged so its better if have a capacitance meter
Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
This problems is the cause by the power supply board is dying.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
the power supply of your tv is bad try to check the fuses if fuse are open try to replace them with the same value..try to power it on but if the fuse blows again replace the power supply board...
good luck plse rate my help.
It sounds like you have a power supply problem, this powers the inverter! Where you just replaced the inverter, we could assume it is good! Look for
some bad caps (capacitors) on the power supply board. They will look bulged on the
top an may be a little leaky (brownish stain). The power supply can fail on some output and be good on others. Was the back light inverter new? If all else fails, see if you can return the back light inverter and get another! I hope this is helpful!!
Hello, I just posted this to another user's question, and you might find it useful, too.
I have a pile of these in my shop. Unfortunately and
usually, a backlight lamp is bad, and the inverter board is damaged
when it goes out. The backlight lamps are sealed inside the panel, so
the usual method of repair is to replace the panel. If you turn
the lights off in the room, then turn the tv on, you will probably see
a momentary flash of light from the backlight trying to start up. The
lamps can be replaced, but the option is not really cost effective
given the amount of time it takes to replace them/very delicate nature
of the lamps/availability of the lamps/cost of the lamps. Replacement
panels might be available, but you'd have to use a TV shop for
reference or call Sanyo directly. These units also have a history of
power supply heat damage, so if you don't see the momentary flash, it
could be the power supply. But the momentary flash is the dead giveaway.
If the inverter board is bad, I would suggest that you replace the whole board unless you have a SMD (Surface Mounted Device) rework station, and a background in electronics. I have worked on TVs where people have tried to remove SMDs and it never is an easy thing to do, so I would again suggest that you replace the whole board, because all of the components are SMDs.
Now as to your question, I have seen on these sets the majority of the time it is a driver transistor that goes bad.
Damage is in the power supply. I am an authorized tech for Sanyo, and in the Chattanooga TN
area. Contact Sanyo at 1-800-877-5036. At the prompt hit the 0 key, and
then ask for customer service. They will be more then happy to assist. If your set is to old for warranty service, and you wish to repair yourself, check out the site www.shopjimmy.com, they can provide functional pwb's for a fraction of the cost of new.