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SONY KVC2171D CH BE3B 1
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Sziasztok!
Egy Sony KLV30HR3 LCD TV nem indul, letilt. A LED 4-et villan, ami a SM szerint (LCD) panel hibát jelent. találkozott már valaki ilyennel, ill. ha igen, orvosolható?
Köszönettel
Attila
Hello
I have on my table this sony kdl32ex600 with backlight issue. It's a common failure of this psu but i do not find any part faulted on this board.
The schematic it is almost the same, with minor differences with GE3B found at page 56 on this service manual:
https://elektrotanya.com/sony_kdl-32ex600_kdl-40ex600_kdl46ex600_chassis_az1-k.pdf/download.html
Uploaded only the page 56 from this sm to easing the search.
The red led it's flashing 2 times, meaning psu faulty. Indeed the led backlight does not light.
With the PSU outside of the tv, just with one resistance of 180ohm between standby ( pin 1 3,3V on connector CN6150 ) i get this values
on in:
starting with pin 1
1 +3,3V ST-BY
2 +3,3V AC_OFF_DET
3 +3,3V POWER_ON (with resistance 180ohm between pin1 and pin 3)
4 +12,56V AUDIO_12V
5 0V AUDIO_12V_GND
6 0V REG_12V_GND
7 0V REG_12V_GND
8 +12,6V REG_12V
9 +12,6V REG_12V
10 +0,1V BL_ERR
11 +3,3V BL_ON
12 0V DIMMER
13 0V DIMMER_DC
14 0V T-CON_Vcc_12V
15 0V T-CON_ON
All measure done at secondary ground point C6800 GND as reference.
Meanwhile, the led connected to CN6800 will remain with no light at all. The CN6800 will deliver positive 91V.
The negative branch will deliver at CN6801 ( both pin1 & 2 ) just -1V.
In the training manual found always in here at
https://elektrotanya.com/sony_kdl-32ex600_40ex600_46ex600_chassis_az1k_training%20manual.pdf/download.html
at page 56 will say "SHORT" at pin 12 DIMMER for testing the PSU, always with pin 3 POWER_ON connected to 3,3V ST-BY - pin1.
If i'll put a 180ohm resistance between GND and pin 12 DIMMER, then the tension on CN6800 will rise to +179V and the negative from the CN6801 will rise to -5V, the backlight led will light very very weak.
All tension from CN6805 will remain the same, except the BL_ERR will rise from +0,1V to +1,1V.
With only power_on pin 3 shorted by 180ohm resistance to the pin 1, i get this weak oscillation at emiter of Q6816 + Q6817
[URL=https://picturepush.com/public/16067400][IMG]https://www1.picturepush.com/photo/a/16067400/640/diverse/Q6816Q6817.jpg[/IMG][/URL]
With pin 12 DIMMER shorted ( always by a 180ohm resistance ) at GND, the oscillation will change from 250khz 1,6vpp to almost 70khz at 0,81Vpp. as below:
[URL=https://picturepush.com/public/16067401][IMG]https://www1.picturepush.com/photo/a/16067401/640/diverse/20181117-175255.jpg[/IMG][/URL]
Already checked the capacitors C6828 / C6830 together with D6805 / D6806.
Also checked the L6800 ( trafo ) and i've get 5,5mH instead of 5mH, i think it's ok.
All fuse checked, ok.
Q6814 and Q6801 tested under mosfet tester, ok.
[url=https://picturepush.com/public/16067402][img=https://www1.picturepush.com/photo/a/16067402/220/16067402.jpg][/url]
IC6800 & IC6801 gave +9V and respectively +2,49V
Already checked various components all over the board, i am out of ideas.
Any idea or help would be apreciated.
I have on my table this sony kdl32ex600 with backlight issue. It's a common failure of this psu but i do not find any part faulted on this board.
The schematic it is almost the same, with minor differences with GE3B found at page 56 on this service manual:
https://elektrotanya.com/sony_kdl-32ex600_kdl-40ex600_kdl46ex600_chassis_az1-k.pdf/download.html
Uploaded only the page 56 from this sm to easing the search.
The red led it's flashing 2 times, meaning psu faulty. Indeed the led backlight does not light.
With the PSU outside of the tv, just with one resistance of 180ohm between standby ( pin 1 3,3V on connector CN6150 ) i get this values
on in:
starting with pin 1
1 +3,3V ST-BY
2 +3,3V AC_OFF_DET
3 +3,3V POWER_ON (with resistance 180ohm between pin1 and pin 3)
4 +12,56V AUDIO_12V
5 0V AUDIO_12V_GND
6 0V REG_12V_GND
7 0V REG_12V_GND
8 +12,6V REG_12V
9 +12,6V REG_12V
10 +0,1V BL_ERR
11 +3,3V BL_ON
12 0V DIMMER
13 0V DIMMER_DC
14 0V T-CON_Vcc_12V
15 0V T-CON_ON
All measure done at secondary ground point C6800 GND as reference.
Meanwhile, the led connected to CN6800 will remain with no light at all. The CN6800 will deliver positive 91V.
The negative branch will deliver at CN6801 ( both pin1 & 2 ) just -1V.
In the training manual found always in here at
https://elektrotanya.com/sony_kdl-32ex600_40ex600_46ex600_chassis_az1k_training%20manual.pdf/download.html
at page 56 will say "SHORT" at pin 12 DIMMER for testing the PSU, always with pin 3 POWER_ON connected to 3,3V ST-BY - pin1.
If i'll put a 180ohm resistance between GND and pin 12 DIMMER, then the tension on CN6800 will rise to +179V and the negative from the CN6801 will rise to -5V, the backlight led will light very very weak.
All tension from CN6805 will remain the same, except the BL_ERR will rise from +0,1V to +1,1V.
With only power_on pin 3 shorted by 180ohm resistance to the pin 1, i get this weak oscillation at emiter of Q6816 + Q6817
[URL=https://picturepush.com/public/16067400][IMG]https://www1.picturepush.com/photo/a/16067400/640/diverse/Q6816Q6817.jpg[/IMG][/URL]
With pin 12 DIMMER shorted ( always by a 180ohm resistance ) at GND, the oscillation will change from 250khz 1,6vpp to almost 70khz at 0,81Vpp. as below:
[URL=https://picturepush.com/public/16067401][IMG]https://www1.picturepush.com/photo/a/16067401/640/diverse/20181117-175255.jpg[/IMG][/URL]
Already checked the capacitors C6828 / C6830 together with D6805 / D6806.
Also checked the L6800 ( trafo ) and i've get 5,5mH instead of 5mH, i think it's ok.
All fuse checked, ok.
Q6814 and Q6801 tested under mosfet tester, ok.
[url=https://picturepush.com/public/16067402][img=https://www1.picturepush.com/photo/a/16067402/220/16067402.jpg][/url]
IC6800 & IC6801 gave +9V and respectively +2,49V
Already checked various components all over the board, i am out of ideas.
Any idea or help would be apreciated.
Sony KV-X2991D-hez kérnék segítséget. Nekiálltam TV-t takarítani és lehúzotam minden csatlakozót, majd szépen vissza is dugtam őket, csak nem jól. Az SM szerint sajnos kettőt rossz helyre dugotam. Az eredmény az lett (miután helyre dugtam mindent), hogy bekapcsol távirányítórol is, majd 3-4mp mólva egy fehér-zöld villanás és 1 mp múlva felete kép sorvisszafutási csíkokkal, majd 2-3mp után ismétlődik ugyan ez. A távirányítóval innentől nem lehet már kezdeni vele semmit sem. A hangsáv jelző ledek pedig villognak együtt a kettő. Takarítás előtt ki szokott kapcsolgatni néha és 13 villanással jelzett is. Sajnos pénzem nincsen másik TV-re, Orbán féle 22800Ft-ból élek, mivel közmunkára alkalmatlannak találtattam. Ha lehetőség van rá, akkor inkább javítanám. 1 éve vettem 5000Ft-ért.
"(olyan fórum téma megnevezést/elnevezést válassz, ami beszédes, minél pontosabban illeszkedik arra, amivel kapcsolatban írsz. pl: ORION LCD PT26S chassis 17MB12-2 nem indul )
Az pl. nem elég, hogy "LG RE" vagy "Cuccok!!!" és így tovább... Comprende!?"
Sziasztok
Kerult hozzam egy Sony Bravia KDL-40R550C LED TV, azzal a diagnozissal, hogy hatter hibas.
Ez elvilagitasos TV, de szerencsere meg nem rendeltem hozza LED sort.
A TV bekapcsol, hang van, hatter vilagitas van!
Kep nincs semmilyen. T-CON-ra gyanakodtam, de mar nem vagyok benne biztos.
Ezeken eleg gyakori a kondi hiba. Nem talaltam zarlatos kondit, de feszultseg alatt is meregettem.
Lehet van olyan feszultseg ami kimaradt, de a tap 12V, a 3.3V, a 1.8V es az 1.2V biztos megvan.
Mellekelek par fotot a T-CON-rol, elegge darabokban van, de legalabb lehet nagyitani.
Valahol olvastam, hogy elfordulhat hogy firmware hiba, le is tudnam tolteni a firmware-t, de nem tudom, hogy kep nelkul hogyan tudnam elinditani az irast.
Az alaplap egy Mediatek processzoros csoda...
Kerlek, segitsetek ennek a problemanak a megoldasaban.
Kerult hozzam egy Sony Bravia KDL-40R550C LED TV, azzal a diagnozissal, hogy hatter hibas.
Ez elvilagitasos TV, de szerencsere meg nem rendeltem hozza LED sort.
A TV bekapcsol, hang van, hatter vilagitas van!
Kep nincs semmilyen. T-CON-ra gyanakodtam, de mar nem vagyok benne biztos.
Ezeken eleg gyakori a kondi hiba. Nem talaltam zarlatos kondit, de feszultseg alatt is meregettem.
Lehet van olyan feszultseg ami kimaradt, de a tap 12V, a 3.3V, a 1.8V es az 1.2V biztos megvan.
Mellekelek par fotot a T-CON-rol, elegge darabokban van, de legalabb lehet nagyitani.
Valahol olvastam, hogy elfordulhat hogy firmware hiba, le is tudnam tolteni a firmware-t, de nem tudom, hogy kep nelkul hogyan tudnam elinditani az irast.
Az alaplap egy Mediatek processzoros csoda...
Kerlek, segitsetek ennek a problemanak a megoldasaban.
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