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PANASONIC TX-W28D3FP
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TV
EPROM
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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!
Abban kérném a segítségeteket, hoy a bekapcs. után FACTORY MODE-ban indul el ez a tv.Talán ezért nem tudok aSM-ben leírtak szerint belépni a szerviz menübe.Hogy lehet ezt eltüntetni,
Köszi: Laci
Sziasztok! Egy öreg volt tv-s kéri a segitségeteket ebben a témában. Szervizdoksim van aszerint a hiba lehet az 5v, a 3,3v (ezeket ellenőriztem, rendben.) A 9v és a tuner maradt még. A tunert nem tudom ellenőrizni, a 9v helyet valami alacsony feszt tudok indikálni. Minden segitséget köszönettel fogadok. gyuripupuc
Üdv Mindenkinek! Egy kis tanácsra lenne ujra szükségem:A cimben szereplö tv müködik ,de csak BG hangal , és mivel a kábeltévén sugárzott adások 90 százaléka DK ban megy igy szinte használhahtatlan ebben az állapotában.Keresgélve infokat róla arra jutottam hogy Alpha 2 saszi lenne elméletileg. Mivel pontosan ennek a tipusnak a rajzát nem találtam meg, letöltöttem többféle Alpha2 rajz verziot , és a legnagyobb mértékben az alábbi rajzal passzol a kapcsolása.Az lenne a kérdésem hogy milyen változtatásokat eszközöljek rajta hogy legyen DK hang , ???Az IC 2102 AN5215 bemenetét nézegetem ,meg az IC 101- M51366SP környezetét , de megerösités nélkül nem szeretnék kisérletezni ..ezért elöször kérdezek... elöre is köszönöm az utbaigazitásokat , tisztelettel dddemeter!
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