Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
Toshiba 37" inverter board failure
Collapse
X
-
Re: Toshiba 37" inverter board failure
So the cap CE92, CE901 are not shorted, then put them back in and verify that there i still no shorts. DE91 is 15V Zener diode.
Do you have any Zener diode?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
Comment
-
Re: Toshiba 37" inverter board failure
They are brown rectangular shape, right? then No polarity on those two ceramic cap.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
Comment
-
Re: Toshiba 37" inverter board failure
We need to verify that we do not have internal shorts between PIN 2 (IN) and PIN3 (SW) of the IC. The reason is that the 15V Zener is shorted out can be due to the 24V is fed through the shorts inside the IC and dump 24V instead of 12V at the output.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
Comment
-
Re: Toshiba 37" inverter board failure
tested no short on icLast edited by whatusername; 05-28-2014, 09:25 PM.
Comment
-
Re: Toshiba 37" inverter board failure
OK, so far you found shorted out DE91 15V Zener, and shorted cap CE901 (10uF 16V), without those two parts installed, the shorts is no longer there. What you can do now is to removed those two wires for the 12VLCD that goes to the main board, connect 100 Ohms 2W resistor to the 12VLCD pin of the power supply and power up the TV to see if you do have 12VDC on the resistor. I want to verify just to be sure it does not put out 24V which will damage the T-CON and it will also trip the over voltage circuit.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
Comment
-
Re: Toshiba 37" inverter board failure
CE92 is fine, not shorted. We cannot just take a chance without using dummy load first, otherwise you can badly damage the T-CON board. Do you have 120V light bulb? You can use 60W bulb as a load (cold resistance of the lamp is about 20 Ohms).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
Comment
-
Re: Toshiba 37" inverter board failure
CE92, 901: From service manual
TOSHIBA P/N 75005814. Part description: CAPACITOR, CERAMIC CHIP, 2012 GRM21BB31C106KE15L
Made by MURATA.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=24809
Comment
-
Re: Toshiba 37" inverter board failure
i am gonna order 10 of those 100 0hm 2 watt resistors just to have themLast edited by whatusername; 05-28-2014, 10:24 PM.
Comment
-
Re: Toshiba 37" inverter board failure
40W will work, just solder two wires to the lamp then solder them to the 12VLVCD pin on the power supply, you must disconnect those two 12VLCD going to the main board, you can cut the wires and splice them back together later.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
Comment
-
Re: Toshiba 37" inverter board failure
this is my mouser cart so far.. plse tell me if its good to go http://www.mouser.com/Cart/Cart.aspx
Comment
Comment