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HT-555-26LAS59
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SERVICE MANUAL
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SERVICE MANUAL
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| Sziasztok
Lenne valakinek ehhez usb frissítése csak logózik. Köszi |
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 gépben lámpát cseréltem. Bekapcsolás után a ventilátor felpörög, a " lamp/cover " pár másodperc múlva felvillan. Majd 25-30mp múlva folyamatosan világít, a stby lámpa villog. Mit nem végeztem el? Az ajtó érzékelő működik, máshol kapcsolót nem találtam.
Szevasztok!
Bekapcsoláskor megjelenik a Philis logó, de onnan nem tud továbbmenni, leáll, és kezdődik elölről.
Mindenféle szoftver frissítést megpróbáltam USB-ről, de nem jártam sikerrel.
Kivettem a NAND flasht, hogy leellenőrizzem, vagy újra írjam. Nos az író pin 12-es (VCC) hibát jelezve,kiolvasni se tudja.
Keresem az MX30LF1G18AC-TI IC-t. Sajnos sehol a közelben nem találtam.
Ha tudnátok segíteni közelebbi forrást megjelöléssel, kölcsön, vagy örökbe megvenném. Ne kellene annyi időt várni, míg messziről beérkezik.
üdv
Dr.Távadó
Áttettem!
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