Service manuals, schematics, eproms for electrical technicians
COBY NBPC1023 REV 2.2 SCH
Type: 
(PDF)
(PDF)Size
1.1 MB
1.1 MB
Page
40
40
Category
NOTEBOOK-PC
SERVICE MANUAL
NOTEBOOK-PC
SERVICE MANUAL
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Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar coby manual?
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COBY NBPC-1023 NBPC1023 REV 2.2 NBPC 1023
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Relevant NOTEBOOK-PC forum topics:
These are PC speakers, picture of the board here
http://www.mediafire.com/view/pzd2kbq5ja0avz8/HPIM0436.JPG/file
Have replaced the TDA2030 IC's with new from stock, still get very hot. Tried now TDA2040 IC's, still run hot. Replaced all electrolytics
and even most the disc caps and the diodes for the bridge, and some of the small surrounding support resistors, really baffled....
Original problem seems to be they put too strong an input into the 3.5mm jack, and there was an MOV on the jack that shorted. Replaced it plus 2
other MOV's on the board. It seemed to be ok but played sound really too low, and only from the bass speaker. The smal L-R tweeters have never put out any sound at all...
they measure ok ohms, so they should work.
http://www.mediafire.com/view/pzd2kbq5ja0avz8/HPIM0436.JPG/file
Have replaced the TDA2030 IC's with new from stock, still get very hot. Tried now TDA2040 IC's, still run hot. Replaced all electrolytics
and even most the disc caps and the diodes for the bridge, and some of the small surrounding support resistors, really baffled....
Original problem seems to be they put too strong an input into the 3.5mm jack, and there was an MOV on the jack that shorted. Replaced it plus 2
other MOV's on the board. It seemed to be ok but played sound really too low, and only from the bass speaker. The smal L-R tweeters have never put out any sound at all...
they measure ok ohms, so they should work.
Sziasztok!
Került hozzám ez a kis rondaság azzal a hibával hogy az Android OS nem bootol.
Reset gombra reagál, de semmi változás, anyagot nem igen találtam.
Annyit amit találtam hogy valami RS232 protokollon kommunikál más gépel, na de ez nekem nem igen világos.
Ha valaki tud nekem ebben segíteni hogy mit is lehet vele kezdeni, azt meg köszönöm!
Mert én a kereséssel sem lettem okosabb....
Minden ötletre nyitott vagyok! :)
A gép így néz ki.
Update: a gép vissza került a tulajdonoshoz. CPU/DISK Hiba
Üdv Istvan78
Update: a gép vissza került a tulajdonoshoz. CPU/DISK Hiba
Üdv Istvan78