Service manuals, schematics, eproms for electrical technicians
JVC AV-B21T
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365.0byte
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Category
TV
EPROM
TV
EPROM
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Good luck to the repair!
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- Also known:
JVC AVB-21T AVB21T AVB 21 AV B21T AV-B21T
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Relevant TV forum topics:
Üdv mindenkinek ! A cimben emlitett LCD TV tápját szeretném ellenőrizni main nélkül. Az a gond, hogy nem tudom hogyan inditsam be a tápot MAIN nélkül. A táp egyik csatalakozóján a következő jelzések vannak: A_DIM / NC, BL_ON/OFF, PWM_DIM/A_DIM, NC, MAIN POW, LB_PRO, STB_3,3V , GND, BT32V. A stand by megvan az 3,2V, a másik konektoron is van egy STB_5V ott is megvan a 4,9V. Melyik két láb áthidalásával indulhat be a táp, mert amúgy nincs 12V sem 24V.
Tisztelt Kollégák!
A gondom ezzel a 100Hz-es döggel, sötét képernyő hang van.
G2 tekerve szüke visszafutásos háttér.
Videovég cserélve, a digi-modul rgb lábain 0,3V van.
Saját eeprom mentésemmel a helyzet ua.
Ötlet esetleg rajz jól jönne.
Köszi, üdv, kovácsa
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!
Egyik ismerősöm hozta, hogy naponta többször el megy a hang, de csak kikapcsolás és újra bekapcsolás után van ismét hang. A main típusa T.MT5310.S97A, a hang végfoka pedig STA3390W. Merre induljak el, mert most nálam csak 2-3 naponta csinálja.
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