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PANASONIC CT-F2923 F2943 SCH
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SERVICE MANUAL
TV
SERVICE MANUAL
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Looking for similar panasonic manual?
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PANASONIC CTF-2923 CTF2923 F2943 CTF 2923 2943 CT F2923 CT-F2923
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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
Sziasztok,
megakdtam a nevezett készülékkel. Egy pillanatra elindul a táp (műterhelés felvillan) és utána csak gyorsan villog a led, a sortáp kb. 13 volt, semmi zárlatot nem találtam. Sorkimenőt lekötve és műterheléssel is ugyanaz. A DP130 SE130-ra cserélve, nem változott. Ha van valakinek tapasztalata és megosztaná megköszönném.
Műterhelésnél a HFB szerintem nem szól bele.
Köszi.
Üdv.
Van valakinek elado alaplap (Mainboard) LCD Panasonic TXL26C10E.
Üdv mindenkinek!
Fent említett tv nem csinált semmit, most lap csere után az a jelenség hogy bekapcsolásra
a led zölden sűrűn pislog majd pirosan lassan. Közben a Panasonic logo balra csúszva megjelenik
kis időre, háttérfény nélkül.
Az eredeti lap TNPH1181 amit beletette az meg TNP4G633
formára tök ugyanaz, több helyen azt írták hogy jó helyette.
Valakinek van tapasztalata ilyenben?
Köszönettel: Csirip
Fent említett tv nem csinált semmit, most lap csere után az a jelenség hogy bekapcsolásra
a led zölden sűrűn pislog majd pirosan lassan. Közben a Panasonic logo balra csúszva megjelenik
kis időre, háttérfény nélkül.
Az eredeti lap TNPH1181 amit beletette az meg TNP4G633
formára tök ugyanaz, több helyen azt írták hogy jó helyette.
Valakinek van tapasztalata ilyenben?
Köszönettel: Csirip
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