Hi, I see a lot of this type of tv but never had this fault. Set works but there is no contrast. Menu bars move left to right but no change. Done usual eeprom reset and fitted new eeprom. still the same. Psu caps etc all ok. Any ideas. Im thinking main board ?
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Re: Samsung LE32M87BD No contrast
post a screen shot so we can see what the picture looks like.
More likely to have AS15 GAMMA IC (U402) problem in the T-CON board.
http://www.shopjimmy.com/media/catal...5531T03112.jpg
http://www.shopjimmy.com/catalogsear...sung+LE32M87BDLast edited by budm; 07-01-2014, 02:00 PM.Never stop learning
Basic 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 -
Re: Samsung LE32M87BD No contrast
. hi thanks for reply. I hope i have uploaded pics ok as first time in trying. Contrast n brightness controls move but have no effect. bright screen with no depth. When pressing menus the last one can still be seen before fading. t con is. T315XW02 v6. Many thanks in advanceAttached FilesComment
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Re: Samsung LE32M87BD No contrast
Looks like a gamma IC fault. Post a picture of the T-con board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung LE32M87BD No contrast
Attached FilesComment
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Re: Samsung LE32M87BD No contrast
Please take a picture in focus, we need to see the small text and small components on the board. In particular along the bottom of the board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung LE32M87BD No contrast
do these AS15 chips run hot?
just wondering why they all die.Comment
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Re: Samsung LE32M87BD No contrast
They usually do not run above about 35°C (barely warm to the touch), and since the output fault affects multiple channels, it seems like it is some kind of internal bias or compensation circuit gone wrong.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung LE32M87BD No contrast
Tom, This picture may help. Provided by SJ.Attached FilesNever stop learning
Basic 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=24809Comment
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Re: Samsung LE32M87BD No contrast
Yes so andyanz will need to test the VGAMA points from 1 to 22 (some missing) on the right hand side of the board, just under right most ribbon connector.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung LE32M87BD No contrast
Thanks guys you have been fantastic. Ive ordered a replacement t con today. will post the results when fitted. Many thanks againComment
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Re: Samsung LE32M87BD No contrast
You did not test the gamma voltages VGAMA to see if the original T-con is actually bad...?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Samsung LE32M87BD No contrast
Took a gamble as top ribbons are difficult to get too as hidden under top frame.Comment
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Re: Samsung LE32M87BD No contrast
Fiited another t con. all working fine now, many thanks for everyones helpComment
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Re: Samsung LE32M87BD No contrast
Thanks for the follow-up.Never stop learning
Basic 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=24809Comment
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