Service manuals, schematics, eproms for electrical technicians

GONSET G15 SCH

OTHER - SERVICE MANUAL
Type: (ZIP)
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3.6 MB
Page
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Category
OTHER
SERVICE MANUAL
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  • Also known:
    GONSET G-15 G15 15
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Relevant OTHER forum topics:
Dorma programozó
Sziasztok. segítséget szeretnék kérni egy Dorma programozó javításában. Hibajelenség :L4963 táp ic. forró kimenetén 1V. körüli táp jelenik meg. N80C31BH1 mikrokontroller szintén forró,(zárlatos). A hibát előidéző ok hogy az RS232-es csatlakozón a kábelek összekócolódtak. Az alkatrészeket hiába cserélném ki nincs szoftver. Kérlek ha tudsz segíteni írj. Üdvözlettel:hifi64
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Battery charger with EM78P41 IC
Working on a speed charge battery maintainer for small engines battery. Heat sink had (2) S2025R T0-220 type components on it. Seems they are an SCR and I have 57 ohms on 1 and 3 pin, so seem they are short. Cant get these anymore but installed S4025R which seems to be better replacement. Before replacing, heat sink seemed to be really hot after replacng on on 
board 10 amp automotive slot type fuse, so seemed these SCR were bad, getting hot woth no load.

Standby LED not lighting with new SCR's installed. Old ones did not have heat sink compound on them, so I used some to better transfer heat. I saw the input of the 7805 1 amp
regulator IC has short, so removed it, and its not shorted, but the feed to it comes from the IC chip on board, a EM78P41 BWD20J. Data sheet for EM78P41 is online. They have pin 16 going to pin 1 of the 7805 regulator. Actual reading on pin 16 to ground is 2.5 ohms. I suspect this IC is shorted output. Is there chance to replace IC or is this repair finished?
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