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PANASONIC TX-28LD1 CH EURO-2 SM.
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676.7 KB
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29
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TV
SERVICE MANUAL
TV
SERVICE MANUAL
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PANASONIC TX-28LD-1 EURO-2 TX28LD1 CH EURO2 SM. TX 28 LD EURO 28LD1 TX-28LD1
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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
Kérem, guriga és Guest ne szóljon a topichoz!
Sziasztok!
Tudnátok segíteni?
Lenne ez a gép. Random módon elmegy a kép, visszajön, elmegy stb. majd
kikapcsol, és 8-at villog a stby led. Csak áramtalanítás után
kapcsolható vissza .
Ez a fajta SS van benne. A csatiakat átnéztem, a földelő csavarokat megtéptem.
Ezeket végigcsináltam amit ír a 8 hibára.
www.werbemousepads.de/pdf/2012_Plasma_TV_Troubleshooting_Guide_2012_04_16_revised.pdf
Van valakinek más ötlete esetleg?
Kösz
Sziasztok!
Tudnátok segíteni?
Lenne ez a gép. Random módon elmegy a kép, visszajön, elmegy stb. majd
kikapcsol, és 8-at villog a stby led. Csak áramtalanítás után
kapcsolható vissza .
Ez a fajta SS van benne. A csatiakat átnéztem, a földelő csavarokat megtéptem.
Ezeket végigcsináltam amit ír a 8 hibára.
www.werbemousepads.de/pdf/2012_Plasma_TV_Troubleshooting_Guide_2012_04_16_revised.pdf
Van valakinek más ötlete esetleg?
Kösz
Unreliable start. Mostly Led flashes red once every 4 secs suggesting Power Unit or LCD Panel. No Start
Sometimes normal start
Thanks for any help.
Tony
Sometimes normal start
Thanks for any help.
Tony
sziasztok
Panasonic TX-W32D4F (euro 5L sasszé) hiba jelzése folyamatos 2 villogás, pillanatra van nagyfesz , de letilt és villogja a 2 -ket.
kérdezném a pana hibajelzéseket hol találnám, vagy aki tud légyszi segítsen.
Attila
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