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PANASONIC TX-20LA2H TX-20LA2A CHASSIS GLP2 LCD TV
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SERVICE MANUAL
TV
SERVICE MANUAL
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- Also known:
PANASONIC TX-20LA-2H TX-20LA-2A CHASSIS GLP-2 TV TX20LA2H TX20LA2A GLP2 LCD TX 20 LA GLP 20LA2H 20LA2A TX-20LA2H TX-20LA2A
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Relevant TV forum topics:
Üdv Mindenkinek!
Fent nevezett ezt produkálja. Újraindításnál rugdossa a demag relét, miközben a sor él, hang van.
Képcsőt mérve: R 0,6, B 0,7, G 0,75.
Csöve:W76MAF 185X72. Tápok rendbe, (mind a prim mind a szek). Függ. cserélve, imp kondik szintén.
Mégis a képcső? Köszönettel.
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! 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
Sziasztok!
A fenti tv képen márványosodás látszik, hasonló, mint amikor az LCD tv gammacorrektora hibás. A plasmáknál mi okozza az ilyen jellegű hibát? Sajnos nem nagy tapasztalatom van plazma tv-k javításában. Segítségeteket előre is köszönöm!
A címen igazíts!
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