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PANASONIC TC-14L2T

TV - EPROM
Type: (RAR)
Size
270.0byte
Page
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Category
TV
EPROM
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    PANASONIC TC-14L-2T TC14L2T TC 14 14L2T TC-14L2T
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Relevant TV forum topics:
Panasonic TX-L42ETW5 Device does not start anymore, stand-by LED lights up red, no SOS error code
Manufacturer: Panasonic

Type: TX-L42ETW5

Chassi: LA35



Hello everybody,

I could determine or measure the following with the device:

Device does not start anymore, stand-by LED lights red when device is plugged in and flashes red as soon as an IR command (key press) is sent via the remote control. Voltages of power supply STB 5V and signal LCD_TV_SUB_ON come from A-board. Power supply starts, supplies P15V and SUB1.1V, 1.5V, 1.8V, 3.3V, 5V, HDMI3.3V and USB5V are generated on the A-Board (stand for about 2.5 seconds). Then signal LCD_TV_SUB_ON goes low (voltages go away to STB 5V) and after about 2 seconds back to high (endless). What is missing is the voltage PNL12V which is switched on by PANEL_VCC_ON2. PANEL_VCC_ON2 always has a low signal and does not change its state. Power supply also provides for the 2.5 seconds the 24V for the backlight. Clocking of LCD_TV_SUB_ON starts immediately after plugging in the mains plug (also without IR command). SOS error code is not output. The over-voltage circuit in IC 5000 pin 7 also does not respond. Attached is the timing diagram from the technical training of Panasonic where I have drawn until when the boot process behaves normally.

In my opinion a mistake on the A-board? Does anyone have a tip?

greetings

Andi
Panasonic TH-42PX80E plazma TV nem indul (valtozott, indul, de beteg)
Sziasztok
Van nalam egy ilyen TV:
Panasonic TH-42PX80E plazma TV
A PFC reszben levo Q406 FET tranzisztor zarlatos volt, a tipusa RJK5010
Ki volt egve  a halozati reszen F401 es F402 biztositek, a tipusa T8AH
Az D401 egyeniranyito hidban zarlatos volt 2 dioda. A hid tipusa a rajta levo jeloles szerint D6SB 80 a rajz szerint B0FBAT000006 (800V/6A)

Ezeket csereltem es meg meregettem a TV-ben de nem talaltam mas hibat.
Csere utan ugy tunt, hogy valami csattant uzembe helyezeskor. Aramtalanitottam es meregettem benne, de minden jo volt.
Utana ismet bedugtam es megfigyeltem a LED-eket.
Amikor aramot kap, a piros LED 10-et pislog. Ez a F_STB +15V vagy valamelyik belole eredo feszultseg hianyat jelenti.
Ha megnyomoma bekapcsolo gombot, pislog a zold LED, de utana ismet 10 piros pislogas.
A kovetkezokre jottem ra:
A STB5V megvan, betapolja a maint, az megadja 15 masodpercig a F_STB_ON feszultseget (3.2V), de F_STB (+15V) nincs.
Tovabb meregetve rajottem, hogy a R448 es R449 teljesitmeny ellenallasok ( 0.12 Ohm/5W) ami a tapot csatolja, szakadtak.
Most jon a kerdesem:
Szerintetek ezek is ki voltak egve amikor elszallt a Graetz, a biztositekok es a FET, vagy pedig van valami zarlat amit nem talaltam meg, es most szallt el? Merve a cserelt alkatreszek most jok.
Elore is koszonok minden velemenyt, minden jot,

Janos
Panasonic TX-21JT2C chassis Z-M3L, nincs hang
Üdv. Mindenkinek. Pana,TX21JT2C tip. Ch: Z-M3L masinával küzdök. Nincs hangja. Proc mutte lába, így a hangvég mutte lába 0V. Proc 62 láb felhúzó ell.nem szakadt, ohmikusan nincs a földön. A végfok sem. A végfokon minden fesz. stimmel, kivéve a 9-es (mutte) Szoftver hiba? Memót még nem cseréltem (smd) Tippeitek?? Köszönettel.
Panasonic TX-29PN1P (Ch.GP4L) semmi életjel
Sziasztok! Hoztak egy ilyen készüléket, jó sokat állt, előzményekről semmit nem tudni. Feszültség alá helyezve tök süket, még a LED sem villan föl, zárlatot, szakadást még nem találtam. Az elkók mérve "jók". Van ennek a típusnak esetleg jellemző hibája?
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