Service manuals, schematics, eproms for electrical technicians
PANASONIC TX-28MD3P
Type: 
(RAR)
(RAR)Size
509.0byte
509.0byte
Page
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Category
TV
EPROM
TV
EPROM
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PANASONIC TX-28MD-3P TX28MD3P TX 28 MD 28MD3P TX-28MD3P
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Üdv!
A címben említett plasma a fenti hibajelenséget produkálja. A meglévő SM csak 12-es kódot ír, igy nem igazán tudom az okát. Mérve, már amit lehet minden ok. Y-sus, Z-sus probára cserélve, helyzet ugyan az.
atti1
A címben említett plasma a fenti hibajelenséget produkálja. A meglévő SM csak 12-es kódot ír, igy nem igazán tudom az okát. Mérve, már amit lehet minden ok. Y-sus, Z-sus probára cserélve, helyzet ugyan az.
atti1
Sziasztok!
Nagyon nem kedvelem a plazmákat, mégis egy ilyet javítanék. Ismerősöm elmondás szerint, (miután hozzá került) egyszer beindult, többé soha. Átmérve hamar kiderült, nem dolgozik a PFC. Most már stabil 400v megvan. Bekapcsolást követően minden feszültség megjön, majd kb. 2 másodperc után kikapcsol és 11 villogás... elvileg ez ha jól tudom ventilátor (meg sem moccannak) hibára utalna. Minden a négy kifogástalan, nem szorul. Külső tápról 12 volton 60mA az áramfelvétel. Próbáltam lekövetni miként is vezérelné őket, de elakadtam. Lenne valakinek tippje mi lehet a gond, vagy tévútra vittem magam ezzel a venti dologgal?
Köszönettel: Kiss Z.
Nagyon nem kedvelem a plazmákat, mégis egy ilyet javítanék. Ismerősöm elmondás szerint, (miután hozzá került) egyszer beindult, többé soha. Átmérve hamar kiderült, nem dolgozik a PFC. Most már stabil 400v megvan. Bekapcsolást követően minden feszültség megjön, majd kb. 2 másodperc után kikapcsol és 11 villogás... elvileg ez ha jól tudom ventilátor (meg sem moccannak) hibára utalna. Minden a négy kifogástalan, nem szorul. Külső tápról 12 volton 60mA az áramfelvétel. Próbáltam lekövetni miként is vezérelné őket, de elakadtam. Lenne valakinek tippje mi lehet a gond, vagy tévútra vittem magam ezzel a venti dologgal?
Köszönettel: Kiss Z.
Sziasztok.
Tudna valaki segíteni eeprom tartalom miatt. Rengeteg típushoz találtam de ehhez semmit. Napokat szántam rá de semmi.
Előre is köszönöm.
Üdv.M
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
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