Service manuals, schematics, eproms for electrical technicians
JVC AV-DT21EBU
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1024.0byte
1024.0byte
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Category
TV
EPROM
TV
EPROM
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- Also known:
JVC AVDT-21EBU AVDT21EBU AVDT 21 EBU AV DT21EBU AV-DT21EBU
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Relevant TV forum topics:
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
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!
Az alján volt egy vizszintes csík. Panel kocogtatására vibrált. Sorát, eltérítő IC-t és pár egyéb sallangot átforrasztottam ( egy vödör cinnel:) ), pár jól melegedő részt is találtam, azokat is.
Tökéletesen működik a gép azóta.
Mehet haza?:)
Köszönöm!
Üdv:
Pityesz
Sziasztok!
Van egy JVC HV 32P40BU 82cm tv,hibája a következő:Bekapcsolás után világít a zöld led de kb 2 mp múlva kikapcsol(2 relé megszakítja a hálozatot) és visszaáll pirosra,a nagyfesz is megvan mert majdnem a kép is előjön.a táp szerintem jó,mert szekunderen a 150 volt megvan a többi feszülség is stimmel,a sorvégfok nem zárlatos szerintem ez is jó.Ha valakinek van valami ötlete,hogy mi lehet a baj,kérem írjon.
Előre is köszönöm!
FLY001
Kiigazítottam a topik címét.
Kalex
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