Service manuals, schematics, eproms for electrical technicians
JVC AV-21L11 AV-21L31 AV-25L31
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(PDF)
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380.7 KB
380.7 KB
Page
35
35
Category
TV
SERVICE MANUAL
TV
SERVICE MANUAL
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- Also known:
JVC AV-21L-11 AV21L11 AV21L31 AV25L31 AV 21 11 31 25 21L11 21L31 25L31 AV-21L11 AV-21L31 AV-25L31
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Relevant TV forum topics:
Kedves Tanyalakók!
A címben szereplő plazma bekapcsolás után kb. 15 perccel elkezd csíkosodni, egyre több csíkkal. Áramtalanítás után bekapcsolás, a kép hibátlan, majd 10-15 perc és kezdődik minden előről.
MEgpróbáltam megörökíteni, a fényképen nem annyira, de a videón jól látható a jelenség.Sajna a videót nem tudom felrakni, szedtem le róla képeket, remélem használható.
Van valami tippetek merre keresgéljek?
Előre is köszi.
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!
Ilyet már látott valaki?
Huzamosabb ideig ment a tv és ilyen kép fogadott.
Szerintetek javithato?
A tv tipusa ismeretlen mert még hátul sincs cimke.
Amugy egy öskövület,mert még aluminium keretes,a hátulja vaslemez.
üdv:atis
Sziasztok,
Tegnap este egy barátom keresett meg a következő problémával:
Van neki egy JVC AV-29FH1SUG típusú TV, ami egy rövid (pár sec) áramkimaradás után eldobta az "agyát": elfelejtette a csatornabeállításokat, illetve a kép geometriája is megadta magát, párnatorzításos és megnyúlt.
Képeket csatolok róla.
A kérdésem: jól gondolom, hogy ezt a hibát esetleg lehet szervizmenüből orvosolni? Ha igen, tudna valaki ebben segíteni (belépés, leírás)?
üdv,
pihe
üdv,
pihe
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