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PANASONIC TC-21PM30T
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714.0byte
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TV
EPROM
TV
EPROM
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PANASONIC TC21PM30T TC 21 PM 30 21PM30T TC-21PM30T
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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.
kaptam egypanasonic tc-21s1rcp tv-t.
a programozásához kéne egy kis segítség vagy leírás.
előre is köszönöm
Hello!
Bekapcsolás után hibátlan kép jelenik meg rajta és egyszer csak visszaáll készenlétbe.
A készenléti led 1-et villog.
Tudja valaki milyen hibakód ez?
Köszi!
Megoldva.
Led sorok cseréje után tökéletesen működik.
Bekapcsolás után hibátlan kép jelenik meg rajta és egyszer csak visszaáll készenlétbe.
A készenléti led 1-et villog.
Tudja valaki milyen hibakód ez?
Köszi!
Megoldva.
Led sorok cseréje után tökéletesen működik.
Sziasztok!
A tv 10 perc üzem után kikapcsol és villog a stby led.Bekapcsolni csak negyed óra múlva lehet ismét. Ha működik semmi gyanús nem látszik rajta. Egyszercsak kikapcsol és villog. A tápfeszek rendben vannak. Találkoztatok már ilyen esettel?
Az STR-re gondolok.
Köszönettel:
Vasmacska
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