Have a nice day.
First of all I want to point out that English is not my language. Thank you for your understanding and apologize for my mistakes.
As I wrote in the title - After approx. 30 minutes the backlight goes off.
Television has already been repaired by somebody before me. Soldering was not its strong side.
After the measurements are at both 5V and 15V sources.
Exactly. 5.1V and 15.2V. I decided to measure some of the components.
See marking numbers on the image.
I measured the QS2015 tester (https://www.buyincoins.com/item/68729.html).
It also measures ESR capacitors. For amateur measurement sufficient - I think.
CCFL tubes I think are OK. If the light lasts 30 minutes
1
Component - IT2604L, Dimension -21x13mm
primary 1Ohm - 0,19mH
secondary 948 Ohmu - 660mH
2
primary 0,6Ohm - 0,19mH
secondary 959 Ohmu - 648mH
3
primary 0,6Ohm - 0,19mH
secondary 945 Ohmu - 607mH
4
primary 0,6Ohm - 0,05mH
secondary 945 Ohmu - 604mH
5,6,7,8
Component - BN 471k 1KVL
5,6,7,8 ESR 17Ohmu
5 - 479pF
6 - 473pF
7 - 472pF
8 - 460pF
9,10
Component - 680μF/35V
9,10 ESR 0,14Ohmu, 0,13Ohmu
9 - 617 μF
10 - 623 μF
11,12
Component - BN 102k 1kVL
11,12 ESR 17Ohmu
11 - 952pF
12 - 962pF
13
Component - BN 222k 1kVL
13 ESR 17Ohmu
13 - 2178pF
14,15,16,17
Component - 1000μF/25V
14,15,16,17 ESR 0,14Ohmu, 0,13Ohmu, 0,13Ohmu, 0,12Ohmu
14 - 949 μF
15 - 933 μF
16 - 960 μF
17 - 960 μF
18,19,20
Component - 1000μF/10V
18,19,20 ESR 0,21Ohmu, 0,19Ohmu, 0,20Ohmu
18 - 1036 μF
19 - 1019 μF
20 - 988 μF
21,22,23,24
Component - BN 10k 6KVL
21,22,23,24 - unknown or damaged can tester measure them?
25,26,27,28
Component - MOSFET 25,27 typ N -62T03GH
MOSFET 26,28 typ P -9563GH
25,26,27,28 - testet multimeter - OK
I think they are faulty, components 1, 3, 4.
1 primary 1Ohm
3 secondary 607mH
4 primary 0.05mH and secondary 604mH
Is my diagnosis correct? Thank you with regards to Paul
First of all I want to point out that English is not my language. Thank you for your understanding and apologize for my mistakes.
As I wrote in the title - After approx. 30 minutes the backlight goes off.
Television has already been repaired by somebody before me. Soldering was not its strong side.
After the measurements are at both 5V and 15V sources.
Exactly. 5.1V and 15.2V. I decided to measure some of the components.
See marking numbers on the image.
I measured the QS2015 tester (https://www.buyincoins.com/item/68729.html).
It also measures ESR capacitors. For amateur measurement sufficient - I think.
CCFL tubes I think are OK. If the light lasts 30 minutes
1
Component - IT2604L, Dimension -21x13mm
primary 1Ohm - 0,19mH
secondary 948 Ohmu - 660mH
2
primary 0,6Ohm - 0,19mH
secondary 959 Ohmu - 648mH
3
primary 0,6Ohm - 0,19mH
secondary 945 Ohmu - 607mH
4
primary 0,6Ohm - 0,05mH
secondary 945 Ohmu - 604mH
5,6,7,8
Component - BN 471k 1KVL
5,6,7,8 ESR 17Ohmu
5 - 479pF
6 - 473pF
7 - 472pF
8 - 460pF
9,10
Component - 680μF/35V
9,10 ESR 0,14Ohmu, 0,13Ohmu
9 - 617 μF
10 - 623 μF
11,12
Component - BN 102k 1kVL
11,12 ESR 17Ohmu
11 - 952pF
12 - 962pF
13
Component - BN 222k 1kVL
13 ESR 17Ohmu
13 - 2178pF
14,15,16,17
Component - 1000μF/25V
14,15,16,17 ESR 0,14Ohmu, 0,13Ohmu, 0,13Ohmu, 0,12Ohmu
14 - 949 μF
15 - 933 μF
16 - 960 μF
17 - 960 μF
18,19,20
Component - 1000μF/10V
18,19,20 ESR 0,21Ohmu, 0,19Ohmu, 0,20Ohmu
18 - 1036 μF
19 - 1019 μF
20 - 988 μF
21,22,23,24
Component - BN 10k 6KVL
21,22,23,24 - unknown or damaged can tester measure them?
25,26,27,28
Component - MOSFET 25,27 typ N -62T03GH
MOSFET 26,28 typ P -9563GH
25,26,27,28 - testet multimeter - OK
I think they are faulty, components 1, 3, 4.
1 primary 1Ohm
3 secondary 607mH
4 primary 0.05mH and secondary 604mH
Is my diagnosis correct? Thank you with regards to Paul
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