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STAR CHASSIS-PC170

TV - SERVICE MANUAL
Type: (ZIP)
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1.3 MB
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Category
TV
SERVICE MANUAL
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  • Also known:
    STAR CHASSISPC 170 CHASSIS PC170
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Relevant TV forum topics:
Roadstar CTV-510 Nagy fesz hiba.
Hy Van egy roadstar ctv510 est tvm, ami nem kapja meg a nagyfeszt. külsőleg a sortrafo joh, de szükségem lenne egy sortrafó rajzra ha vki tud valahol.
Panasonic TX-L42ETW5 Device does not start anymore, stand-by LED lights up red, no SOS error code
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
Goldstar CK-21A80X
Sziasztok! Azthiszem egyetértetek velem abban, ha bontani akarom. Másfél órát biztos szüttyögtem már vele, de készenlétből a relé kattan de nem kapcsol be. A TV-t leejtették, a panel alaposan szét van törve, vagyis repedve. Ezenkívül a kávából a cső is kitört az egyik felfogatásnál. Szóval... Ordítsatok ha kell vmi. A proci már úgynéz ki elkel. Üdv: Pityesz
Star Light 40DM5500 háttér csere után LED áramának csökkentése - megoldva

Sziasztok!

A címben szereplő Star Light-nak matricázott csoda szerkezetben komplett hátteret cseréltem. Gyanúsan nagy fényerő miatt még inkább mértem áramot 379mA. Kicsit sokallom, szerintem 350mA alatt kéne lennie. Menüben nem tudtam (vagy baromi elrejtett helyen van) állítani. A klasszikus pár tized source ellenállás változtatással sem változott az áram (gyárilag 4 db 0,3ohm párhuzamosan). Még sorba kötve normás Si diódára sem változott az áram.

Háttér vezérlő IC: OB3353CP. Adatlapja szerint az 5-ös lábán lévő ellenállások kéne változtatni, méréseim szerint (áramkörben) 3kohm-mal van testre kötve. Az adatlap szerinti képlet alapján ha jól számoltam 0,1A LED áram jön ki. A LED-ek másik vége a testre van kötve.

Sokat nem kísérleteznék vele, mert a háttér második rendelésre jött meg nagysokára (elsőn mintha átmentek volna).

A segítséget előre is köszönöm, makittib.

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