Service manuals, schematics, eproms for electrical technicians
JVC LT-46DS9BJ BU CHASSIS FT4
Type: 
(PDF)
(PDF)Size
9.6 MB
9.6 MB
Page
53
53
Category
TV
SERVICE MANUAL
TV
SERVICE MANUAL
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- Also known:
JVC BU CHASSIS FT-4 LT46DS9BJ FT4 LT 46 DS BJ FT 46DS9BJ LT-46DS9BJ
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Relevant TV forum topics:
JVC AV-21FMG4G Chassis SCW-1362A CRT TV blinks continuously after three failing power on attempts.
According to the customer, the upper portion of the screen started shrinking with horizontal lines, then ended with a single thin horizontal line.
This suspects the vertical drive section to be problematic. No vertical output though vertical in put is OK. After conducting an ESR check for capacitors in the vertical section, C428 (100uF 35V), connecting VCC1 with Pump-up pin # 3 of the IC, it measured 1200pF. It was replaced but still no vertical output. So changed the vertical IC401 (TDA78040), and the output appeared, but still blinks after three failing start-ups. I, m suspecting the corrupt EEPROM data.
CPU: TDA11010H / N1D00
EEPROM: 24C16A
Any one with EEPROM dump for this model or any help please?
According to the customer, the upper portion of the screen started shrinking with horizontal lines, then ended with a single thin horizontal line.
This suspects the vertical drive section to be problematic. No vertical output though vertical in put is OK. After conducting an ESR check for capacitors in the vertical section, C428 (100uF 35V), connecting VCC1 with Pump-up pin # 3 of the IC, it measured 1200pF. It was replaced but still no vertical output. So changed the vertical IC401 (TDA78040), and the output appeared, but still blinks after three failing start-ups. I, m suspecting the corrupt EEPROM data.
CPU: TDA11010H / N1D00
EEPROM: 24C16A
Any one with EEPROM dump for this model or any help please?
Sziasztok!
A fenti gépcsoda nem mutat semmi képet, de
az elején egy kék LED világít
háttérfény semmi
A tápegységen mérve 5V standby rendben
a többi feszültség 3 másodpercenként van, majd 3 másodperc múlva kikapcsol, értékeik megfelelőek.Ezt sokáig ismételgeti.
A táp felé is kapcsolgatja a standby jelet a vezérlő panel ki-be azonos ütemben.
Az inverter-tápegység panel YP1922-4LHM, bár nem hiszem, hogy ez a gond.
Találkozott valaki ezzel a hibával?
Köszi a válaszokat!
Péter
Szükségem lenne a tárgyban említett N-csatornás Power MOSFET alkatrészre. Egy plasma tv-ben dobta el magát.
Az adatlapja:
http://www.datasheetcatalog.org/cgi-bin/helo.pl?field=Nume&type=C&text=b14nk50&producedby=&action=Search
Tud valaki beszerzési forrást hozzá, esetleg helyettesítőt?
Sziasztok! Gyors menetnek tűnt,de...Sortranya hibával került hozzám a tv. Már az is gyanús volt hogy konkrét okát nem találtam miért ment tönkre. Visszafutás kondi ok,sortápfesz ok(135V),meghajtójel megvan. Izzóval indítva ok,ezután jöhet az éles próba:elsőre indul,tökéletes kép,hang,látszólag minden jó. Félórai üzem után vége. Új tranyó halott,a hűtőborda foghatatlanul forró. Szóval nagyon melegszik,ez öli meg. Tudom meg kéne erőltetnem kicsit az agyamat,de ha valaki átesett már ilyenen, megköszönném a segítségét!
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