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Thread Tools | Display Modes |
05-25-2012, 11:02 AM
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#1 |
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Member
Join Date: Jan 2011
City & State: memphis.tn
My Country: united states
Line Voltage: 120ac 60hz
I'm a: Hardcore Geek
Posts: 29
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dual rectifier
im looking for the data sheet for this part. part name is en220a it is from a ps to power the inverter.
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05-25-2012, 11:21 AM
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#2 |
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Slow Learner
Join Date: Dec 2010
City & State: Lancashire UK
Posts: 4,657
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Re: dual rectifier
Did you try typing en220a into google - is it one of those parts. Sorry if you tried that
already - can you post a pic of it. Please also can you update your profile with country and mains voltage. |
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05-25-2012, 11:22 AM
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#3 |
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Badcaps Veteran
Join Date: Apr 2011
City & State: University of Leeds (MEng ElecEng undergrad)
My Country: UK
Line Voltage: 230Vac 50Hz
I'm a: Student Tech
Posts: 14,675
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Re: dual rectifier
Do you have a picture of the part, and the area of the PSU it comes from?
If the device is failed (usually shorted), then it may be possible to use an alternative compatible device.
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** Begin Signature ** I fix TVs and electronics as a hobby and to save nice things from the dump. 40 LCD TVs, 4 monitors, 13 plasma TVs, and a 6.1 system! Free service manuals database: http://www.toms-service-manuals.com/ - Have a manual? Need a manual? Please PM me. I have successfully fixed (from best --> worst build quality): 3 Panasonic Plasmas, 1 Yamaha HTS, 1 NEC Plasma, 2 Sharp LCDs, 2 Toshiba LCDs, 5 Philips Plasma/LCD, 1 Hitachi Plasma, 5 LG LCD/Plasma, 10 Samsung LCD/Plasma, 1 Thomson Plasma, 1 Atec LCD, 1 Hanspree LCD, 1 Xerox LCD, 1 Harwa LCD, 2 Proview LCD, 2 Hyundai LCD, 1 "Onn" LCD, 1 Dell LCD, 1 iiyama LCD, 1 Logik LCD, 5 Bush LCD, 10 Vestel LCDs [Please do not PM me for help: I am a busy student, and we prefer input from all sides on this forum.] |
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05-25-2012, 02:17 PM
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#4 |
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Member
Join Date: Jan 2011
City & State: memphis.tn
My Country: united states
Line Voltage: 120ac 60hz
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Posts: 29
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Re: dual rectifier
the part go right behind the yellow and black transformer. it traces back to the plugs for the inverter. it reads 1.83 in diode check. and 70k in ohms. which seems very low.
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05-25-2012, 02:41 PM
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#5 | |
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Badcaps Veteran
Join Date: Jan 2011
City & State: uk
My Country: uk
Line Voltage: 230v 50hz
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Posts: 380
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Re: dual rectifier
Quote:
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05-25-2012, 02:43 PM
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#6 |
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Badcaps Veteran
Join Date: Apr 2011
City & State: University of Leeds (MEng ElecEng undergrad)
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Re: dual rectifier
That sounds fine, but to confirm -
Number pins 1-3 left to right. Labelled (pos/red) (neg/black) respectively (use diode test.) Test 1-2 should read ~150 - 700. Test 2-1 should read single "1" or "OL". Test 2-3 should read single "1" or "OL". Test 3-2 should read ~150 - 700. Test 1-3 should read single "1" or "OL". That looks a lot like a Toshiba PSU. The power module clamped to the heatsink (the one with lots of pins) can sometimes go faulty, though this usually blows the fuse. |
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05-25-2012, 02:44 PM
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#7 | |
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Badcaps Veteran
Join Date: Jan 2011
City & State: uk
My Country: uk
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Re: dual rectifier
Quote:
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05-25-2012, 02:52 PM
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#8 | |
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Badcaps Veteran
Join Date: Apr 2010
City & State: Canada
Posts: 8,176
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Re: dual rectifier
Quote:
http://www.sanken-ele.co.jp/en/prod/...fmen-220ae.pdf
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05-25-2012, 02:55 PM
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#9 |
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Slow Learner
Join Date: Dec 2010
City & State: Lancashire UK
Posts: 4,657
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Re: dual rectifier
Data sheet?
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05-25-2012, 03:35 PM
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#10 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Posts: 7,232
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Re: dual rectifier
Common Cathode with Isolated tab, we ran into this problem before with the person did not order the Isolated tab version.
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Never stop learning Baisc LCD TV and Monitor troubleshooting guides. http://www.badcaps.net/forum/showthr...956#post305956 Voltage Regulator (LDO) testing: http://www.badcaps.net/forum/showthr...999#post300999 Inverter testing using old CFL: http://www.badcaps.net/forum/showthr...er+testing+cfl Tear down pictures : Hit the ">" Show Albums and stories" on the left side http://s807.photobucket.com/user/budm/library/ TV Factory reset codes listing: http://www.badcaps.net/forum/showthread.php?t=24809 |
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05-25-2012, 04:14 PM
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#11 | |
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Slow Learner
Join Date: Dec 2010
City & State: Lancashire UK
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Re: dual rectifier
Quote:
But the datasheet retiredcaps and I have given is for the TO-220F package which is fully insulated, though it doesnt say so in the sheet other than by the package type. |
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05-25-2012, 04:26 PM
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#12 |
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Member
Join Date: Jan 2011
City & State: memphis.tn
My Country: united states
Line Voltage: 120ac 60hz
I'm a: Hardcore Geek
Posts: 29
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Re: dual rectifier
i normally repair audio amps and such. im trying tv's now. different ball game now.
i tried google but didnt come up with anything. i did the steps they are good. i found a bad zener diode over by the big ic now the relay click. the problem was it was in a pawn shop on display and they left it on all the time until it went out if it helps any. |
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05-25-2012, 04:38 PM
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#13 | |
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Badcaps Veteran
Join Date: Apr 2011
City & State: University of Leeds (MEng ElecEng undergrad)
My Country: UK
Line Voltage: 230Vac 50Hz
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Posts: 14,675
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Re: dual rectifier
Quote:
Zeners are difficult to test with a meter, but they most commonly fail shorted or open. If you test one way and get a reading around 500mV, it is probably okay. But if you test nearly zero or open both ways then it's failed. Are you getting any power indication from the TV? Any LED? Do you have a multimeter? If so: - Is the mains fuse OK? - Does it give a standby voltage (usually 5V)? - If it turns on does 12/24V come up? |
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05-25-2012, 07:03 PM
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#14 |
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Member
Join Date: Jan 2011
City & State: memphis.tn
My Country: united states
Line Voltage: 120ac 60hz
I'm a: Hardcore Geek
Posts: 29
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Re: dual rectifier
yeah i have a fluke 75 and a leader 15mhz scope.
these are the voltages 12v- 11.68 6v- 6.4 24v-0 5v-5 power sig 3.28 Last edited by timwebb22; 05-25-2012 at 08:08 PM.. |
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05-25-2012, 09:49 PM
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#15 |
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Member
Join Date: Jan 2011
City & State: memphis.tn
My Country: united states
Line Voltage: 120ac 60hz
I'm a: Hardcore Geek
Posts: 29
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Re: dual rectifier
ok i was trying different grounding points while testing. i used the heatsink on the big ic as a grounding point and i see 28v on the 12-24v pin for the inverter and i get 19.6 volts on the pins on the inverter.
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05-26-2012, 01:31 AM
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#16 | |
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Badcaps Veteran
Join Date: Apr 2011
City & State: University of Leeds (MEng ElecEng undergrad)
My Country: UK
Line Voltage: 230Vac 50Hz
I'm a: Student Tech
Posts: 14,675
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Re: dual rectifier
Quote:
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05-26-2012, 06:15 AM
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#17 |
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Member
Join Date: Jan 2011
City & State: memphis.tn
My Country: united states
Line Voltage: 120ac 60hz
I'm a: Hardcore Geek
Posts: 29
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Re: dual rectifier
ok. it looks like im missing the 12-24v for the inverter.
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05-26-2012, 06:27 AM
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#18 |
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Badcaps Veteran
Join Date: Apr 2011
City & State: University of Leeds (MEng ElecEng undergrad)
My Country: UK
Line Voltage: 230Vac 50Hz
I'm a: Student Tech
Posts: 14,675
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Re: dual rectifier
Can you post a top-down picture of the PSU?
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05-26-2012, 07:12 AM
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#19 | |
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Slow Learner
Join Date: Dec 2010
City & State: Lancashire UK
Posts: 4,657
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Re: dual rectifier
Quote:
and please can we have a picture of the bottom of the board. Also can you state the make and model of the TV. |
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05-27-2012, 05:12 PM
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#20 |
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Member
Join Date: Jan 2011
City & State: memphis.tn
My Country: united states
Line Voltage: 120ac 60hz
I'm a: Hardcore Geek
Posts: 29
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Re: dual rectifier
that dark spot must be from the factory. i seen it a few other power supplies online.
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