Forum: Troubleshooting TVs and Video Sources
01-16-2022, 08:56 AM
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Replies: 19
Views: 980
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Forum: Troubleshooting TVs and Video Sources
01-08-2022, 09:51 AM
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Replies: 27
Views: 1,813
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Forum: Troubleshooting TVs and Video Sources
12-20-2021, 01:26 PM
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Replies: 29
Views: 2,229
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Forum: Troubleshooting TVs and Video Sources
12-20-2021, 01:05 PM
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Replies: 27
Views: 1,813
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Forum: Troubleshooting TVs and Video Sources
12-20-2021, 09:15 AM
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Replies: 27
Views: 1,813
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Forum: Troubleshooting TVs and Video Sources
12-13-2021, 11:45 AM
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Replies: 22
Views: 1,341
Re: Samsung UN32N5300 SmarTV -2018
Another though is...........have you measured the voltages at the led connector (with leds disconnected) and then power up and see what the voltage peaks to. If ithe peak exceeds the 57V then it's...
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Forum: Troubleshooting TVs and Video Sources
12-13-2021, 10:31 AM
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Replies: 22
Views: 1,341
Re: Samsung UN32N5300 SmarTV -2018
Just a quick thought. Can you check the resistance and inductance of T9101C. There have been a few issues with inductors running hot and failing in the led circuits.
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Forum: Troubleshooting TVs and Video Sources
12-13-2021, 05:01 AM
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Replies: 29
Views: 2,229
Re: lg 47LB585V help to identify ic please
You may well be correct. Just looking at the application note show there are two mosfets connected in totem pole so the 240 ohms could well mean that one of the internal mosets is damaged.
Good luck...
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Forum: Troubleshooting TVs and Video Sources
12-12-2021, 12:01 PM
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Replies: 7
Views: 500
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Forum: Troubleshooting TVs and Video Sources
12-12-2021, 11:35 AM
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Replies: 7
Views: 500
Re: Samsung LT22B350, alim BN44-00505A
Maybe this one
https://www.digikey.co.uk/en/products/detail/onsemi/MMBD6050LT1/11514935
They appear to be 3 pin SOT-23, 200mA, 70V diodes
I think the BAS 40-06 E6433 from Mouser will be an...
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Forum: Troubleshooting TVs and Video Sources
12-12-2021, 11:30 AM
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Replies: 29
Views: 2,229
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Forum: Troubleshooting TVs and Video Sources
12-12-2021, 11:05 AM
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Replies: 7
Views: 500
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Forum: Troubleshooting TVs and Video Sources
12-12-2021, 09:28 AM
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Replies: 29
Views: 2,229
Re: lg 47LB585V help to identify ic please
Are you saying L2411 has a resistance of 240 ohms or the output of the IC (1.5V ) to ground measured 240 ohms.
What is the resitance with the meter on one pad of L2411 to ground and again what is...
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Forum: Troubleshooting TVs and Video Sources
12-12-2021, 07:26 AM
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Replies: 29
Views: 2,229
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Forum: Troubleshooting TVs and Video Sources
12-10-2021, 06:25 AM
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Replies: 2
Views: 350
Re: lg 47lx6900-zd
Russian site says it's an LD03R chassis
Maybe similar to one of these.
https://www.electronica-pt.com/english/electronica-search?find=LD03R
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Forum: Troubleshooting TVs and Video Sources
12-09-2021, 07:51 AM
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Replies: 35
Views: 2,211
Re: Phillips 55PUS6561/12 Black Screen
When you say short what was the resistance reading across the capacitors?
Always best to add the pictures to your posting using "Go Advanced"
You could also of added to your existing thread...
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Forum: Troubleshooting TVs and Video Sources
11-29-2021, 01:07 PM
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Replies: 51
Views: 2,715
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Forum: Troubleshooting TVs and Video Sources
11-26-2021, 01:12 PM
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Replies: 36
Views: 2,431
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Forum: Troubleshooting TVs and Video Sources
11-26-2021, 09:33 AM
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Replies: 3
Views: 509
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Forum: Troubleshooting TVs and Video Sources
11-26-2021, 09:18 AM
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Replies: 17
Views: 1,125
Re: samsung LE32A558p3f bn44-00208a
Capacitors I also buy from CPC who have a massive range to choose from. You can also look at the specifications to ensure what you buy has the correct width, height and leg pinout so as to fit the...
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Forum: Troubleshooting TVs and Video Sources
11-26-2021, 09:06 AM
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Replies: 36
Views: 2,431
Re: Vestel 17IPS71 + 17MB82S - no standby
A photo of your power supply may be useful. It should provide 24V and the 5V is probably derived from the 12V at the mainboard.
What revision 17IPS71 is the power supply.
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Forum: Troubleshooting TVs and Video Sources
11-21-2021, 05:52 AM
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Replies: 16
Views: 1,095
Re: THOMSON 32lb120s4 no sound
You may have a faulty Q1 or the +5V from the TDA7490L may be missing or either the ON/OFF or MUTE signal may be stuck at +5V.
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Forum: Troubleshooting TVs and Video Sources
11-21-2021, 04:59 AM
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Replies: 17
Views: 1,125
Re: bn44-00208a
Physical size could be that it may be better at reducing the ripple current on that supply.
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Forum: Troubleshooting TVs and Video Sources
11-20-2021, 05:17 PM
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Replies: 16
Views: 1,095
Re: THOMSON 32lb120s4 no sound
The +5V and -5V are internally generated by the TDA7490L and available on pin 12 (+5V) and pin 16 (-5V).
The +5V (+VA5) then goes off to supply Q1 which controls the ON/OFF and Mute function.
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