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PANASONIC TY-ST42D2-WG TY-ST42D2-WK TY-ST42D2-WS TY-ST50D2-WG TY-ST50D2-WK TY-ST50D2-WS
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SERVICE MANUAL
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SERVICE MANUAL
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PANASONIC TYST42D2WG TYST42D2WK TYST42D2WS TYST50D2WG TYST50D2WK TYST50D2WS TYST 42 WG WK WS 50 TY ST42D2 ST50D2
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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
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
Sziasztok!
Adott a tárgybéli tv, 4-es hibát villog.A fölső élvilágítás nem működik.
Készülék típus alapján nem találok hozzá.Kínában se. Nem tudja valaki mi a háttér gyári kódja?
Nincs kedvem szétszedni, pláne, hogy necces lehet vagy lehetetlen a beszerzése.
Kijelző: LC420EUH(SC)(A3)
Köszönöm,üdv,kovi
Sziasztok!
A fenti Tv-hez keresnék komplett tápegységet baráti áron. :)
Képek lent, a pontos típusa : TNPA4221
Ha valakinek van, kérem jelezze árral együtt!!
Túl sokat nem költenék rá, de kidobni sajnálnám..
:)
Köszönöm!
Atomka
A fenti Tv-hez keresnék komplett tápegységet baráti áron. :)
Képek lent, a pontos típusa : TNPA4221
Ha valakinek van, kérem jelezze árral együtt!!
Túl sokat nem költenék rá, de kidobni sajnálnám..
:)
Köszönöm!
Atomka
Sziasztok.
Az a gondom ezzel a szerkezettel hogy nem akar jó szívvel indulni. Ha röviden nyomom a csatorna gombot csak egyet pislog és nem indul. Ha hosszan lenyomva tartom elindul és utána jól megy. Kondikra gyanakodtam de nem igazán jöttem rá a hibára. Valakinek esetleg volt hasonló problémája?
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