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PANASONIC TX-25MD1M
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TV
EPROM
TV
EPROM
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Good luck to the repair!
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Looking for similar panasonic manual?
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PANASONIC TX-25MD-1M TX25MD1M TX 25 MD 25MD1M TX-25MD1M
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A fenti masinával lenne egy kis gond.
A tulaj elmondása szerint tökéletesen működött, mind addig amíg d-sub kábelt nem dugtak rá. Ezután jött a probléma. Bekapcsolást követően éles sípolás jön a hangszórókból. A probléma minden bemeneten jelentkezik. Filmeknél a robbanások hangja helyett csat recsegés van, szövegnél lehet hallani mit mondanak, de a sípolást is. Szétszedve a masinát a következőre jutottam: sehol semmi probléma. Az audió IC-t könnyű volt megtalálni. A száma: D5452A. Erősítsétek meg, hogy ez szált el.
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!
A fenti tv hibája: csak stby, semmire nem reagál (táv, előlapi gombok). Eltelik fél-három óra, utána szó nélkül bekapcsolható, mindene hibátlanul működik. Tápja jó, ezt mértem, ez bitztos. Valami ötlet, merre tovább? Esetleg kotta valakinek?
Minden segítséget előre is köszönök!
A fenti tv hibája: csak stby, semmire nem reagál (táv, előlapi gombok). Eltelik fél-három óra, utána szó nélkül bekapcsolható, mindene hibátlanul működik. Tápja jó, ezt mértem, ez bitztos. Valami ötlet, merre tovább? Esetleg kotta valakinek?
Minden segítséget előre is köszönök!
Sziasztok!
A fenti készülék, fókuszálatlanul indul. A potit ütközésig tekerve valamit javul, majd pár perc múlva éles jól fókuszált képet mutat. EAK csővel szerelt, szerintetek a cső, vagy a trafó halódik? Köszönöm a figyelmet!
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