Service manuals, schematics, eproms for electrical technicians
JVC VCR HRJ420U
Type: 
(RAR)
(RAR)Size
197.0byte
197.0byte
Page
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Category
TV
EPROM
TV
EPROM
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JVC VCR HRJ-420U HRJ420U HRJ 420
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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!
Adott ez a JVC LT-32V54LWA led tv. Sajnos csak a JVC logót ismételgeti, 10 másodpercenként újraindul. A stby led végig villog, úgy ahogy az indításkor szokott.
Kerestem USB frissítést hozzá, lehet hogy elég lenne a bootloader helyreállító is - de ami linket találtam azokról már törölték a fájlokat.
Volt valami vesteles oldal, ahol a vonalkód feletti számsor alapján lehetett letölteni firmware-t. Most ezt sem találom.
Az azonosító: 10120692 1812800104
Előre is köszönöm a segítséget!
Joco
Adott ez a JVC LT-32V54LWA led tv. Sajnos csak a JVC logót ismételgeti, 10 másodpercenként újraindul. A stby led végig villog, úgy ahogy az indításkor szokott.
Kerestem USB frissítést hozzá, lehet hogy elég lenne a bootloader helyreállító is - de ami linket találtam azokról már törölték a fájlokat.
Volt valami vesteles oldal, ahol a vonalkód feletti számsor alapján lehetett letölteni firmware-t. Most ezt sem találom.
Az azonosító: 10120692 1812800104
Előre is köszönöm a segítséget!
Joco
Sziasztok!
A cimbeli lcd tévén koaxról tökéletes a kép, de nincs hang, scartról fekete-fehér és ugrál a kép de van hang. Mi okozhatja ezt a hibát? Mindkét scart csatiról ugyanolyan rossz a kép.
Ha van róla rajzotok légyszi küldjétek át. Köszi.
Vestel belsősElőször azt hittem tápegység gond, de probáltam másikkal azzal is semmi.Arra jutottam, hogy bontom tovább, A világitást 2db JL.D320B1235 számú ledcsík adja, kérdésem az lenne, hogy nem tudnátok megmondani milyen smd ledek vannak rajta, milyet lehetne rárakni a hibás led helyére,?Vagy valami más megoldás, led szalagból valamit összehozni?Most tartok ott ,hogy pattintgatom le a fényszóró vackokat, úgy gondoltam azt majd pillanatragasztóval visszarakom.
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