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JVC AV N29703SCH
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(PDF)
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2.6 MB
2.6 MB
Page
11
11
Category
TV
SERVICE MANUAL
TV
SERVICE MANUAL
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JVC AV N-29703SCH N29703SCH 29703
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Relevant TV forum topics:
Hello.A fent emlitet sasszé-val szerelt Tv nem kapcsol be,a standby led villog,és halk kattogás halható az alaplapból.Nem vagyok tv szerelö,de a hasznos tanácsokat megköszöném.Az alaplapon égés nyom,pupos kondi nem található,ha nem boldugolok vele,akkor megy szakemberhez.Köszi.
Szevasztok !
A készülék a távra reagál,a led zöldre vált és működik.Van olyan eset ,hogy a led zöldre vált a táp indul,viszont a háttérfény nem kapcsol és hang sincs.
A táp CEM 842 A ,a MAIN T.MT 5310.S 97 A ?.
Amikor a led átvált zölre és nem indul a háttér és nincs hang,akkor a main power csatlakozóján nincs meg a 2,68 V és az 5.54 V.Működő állapotban ennyit mértem.Az U6 stabon a 3.3 V fesz 3.47 V-ra emelkedik amikor nincs kép- hang.
Itt megakadtam, ezért kérnék manualt,segítő ötletet.
Üdv.:ferenc.
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 TV bekapcsolása után feljön néhány pillanatra egy fehér képernyő és TV kikapcsol.2.5 volt körüli feszültség mérhető a színvégfok vezérlésnél mindhárom színnél.Színvégfokon 12 volt megvan tápja 196 volt.Találtam egy tranzisztort (smd),ami a 6.8M jelre hallgat és egyik irányban szakadtnak mértem.Sehol nem találom a megfelelőjét,nem tudom beazonosítani.Interneten sehol nem találok rajzot.A sassy elvileg:JF RMC794.
Minden segítséget köszönök!
János
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