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#101 |
New Member
Join Date: Jul 2014
City & State: egypt
My Country: egypt
I'm a: Knowledge Seeker
Posts: 1
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![]() Thank you very much .Hello, i'am new
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#102 | |
New Member
Join Date: Jan 2009
Posts: 1
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![]() Quote:
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#103 |
New Member
Join Date: Aug 2014
City & State: mpls/mn
My Country: USA
I'm a: Knowledge Seeker
Posts: 2
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![]() Thanks, Bud M! this is great!
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#104 |
New Member
Join Date: Aug 2014
City & State: belgrade
My Country: Serbia
I'm a: Knowledge Seeker
Posts: 1
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![]() Hi guys, I have a problem.I have a Sony kdl40ex720 lcd tv.The problem is that I have a sound and a picture but it is all green.When I get into the menu its also green.And I dont know what can be a problem.The tv was brought 3 years ago. Please help.
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#105 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() Another successful troubleshooting to locate bad inverter transformer.
http://www.badcaps.net/forum/showthr...957#post472957
__________________
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 |
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#106 |
New Member
Join Date: Aug 2014
City & State: Cleveland
My Country: england
I'm a: Knowledge Seeker
Posts: 1
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![]() great post
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#107 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() Led string indicator to find out which string is dead.
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#108 |
New Member
Join Date: Sep 2014
City & State: nc
My Country: US
I'm a: Knowledge Seeker
Posts: 9
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![]() Bookmarked.
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#109 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() EEFL info
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#110 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() Sony KDL-40EX400 shutdown problem with firmware fix:
http://www.badcaps.net/forum/showthr...842#post480842 Last edited by budm; 09-05-2014 at 10:26 PM.. |
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#111 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() JVC power supply training.
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#112 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() GFCI outlets and lamp in series with UUT (Unit Under Test) for self limiting current and protection.
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#113 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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#114 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() What bad brown glue can do:
http://www.badcaps.net/forum/showthread.php?t=34692 |
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#115 |
Badcaps Veteran
Join Date: May 2014
City & State: Hilo, HI
My Country: USA
I'm a: Knowledge Seeker
Posts: 1,336
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![]() that Led string indicator looks really cool, but i cant tell exactly how to build it just from the pictures. could you draw a schematic and maybe explain a little? thanks!
__________________
Don't fear the repair... |
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#116 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() More info on T-CON and Panel failure.
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#117 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() LED and power supply.
Last edited by budm; 10-01-2014 at 04:00 PM.. |
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#118 |
Member
Join Date: Oct 2014
City & State: Trento
My Country: ITALY
I'm a: Knowledge Seeker
Posts: 39
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![]() Thank you for this useful information.
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#119 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() LCD panel disassemble to get to bad lamps assemblies, SAMSUNG 25" TV/MONITOR, also show how to verify if the lamps are bad using spare lamps.
This failed unit you can smell Ozone. |
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#120 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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![]() Simplified operation of the TV:
So once you get the STBY to work, then you hook it up to the main board, if the main board is OK then when you hit the power switch, the main board should send the PS_ON (>2.5VDC, this signal is used to turn on the switched transistor to supply the VCC which is generated by the AUX winding of th STBY transformer to run the PFC controller IC and the SMPS IC) to turn on the PFC Voltage booster (the voltage on the cap should go up from 160VDC to >360DVC) and the 12V/24V SMPS section, after slight delayed it should send the BL_ON and diming control signals that are routed through the power supply for clean wiring to the inverter board to turn on the backlights, and at the same time the processor on the main board will send the T-CON on command to turn on the switched MOSFET which is used as a switch to supply the 12V (or 5V depends on the panel) to the T-CON board, that is the basic operation of the TV. |
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