Service manuals, schematics, eproms for electrical technicians

MASTECH MS2001C

VIDEO-DVD - SERVICE MANUAL
Type: (ZIP)
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Category
VIDEO-DVD
SERVICE MANUAL
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  • Also known:
    MASTECH MS-2001C MS2001C MS 2001
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Relevant VIDEO-DVD forum topics:
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Sony Sl-S770 vcr interrupted playback and AV display issues

I'm encountering an issue with my Super Betamax player. During playback, some cassettes abruptly stop playing at seemingly random points, accompanied by a sound similar to the one made when a tape reaches its end. This interruption also renders the rewind and forward buttons unresponsive. However, it does not impede the manual forwarding or rewinding of the cassette. The only solution seems to be ejecting the cassette and reinserting it. Occasionally, even this workaround fails, allowing only two seconds of playback before the problem recurs.

I sought guidance from the Mister Betamax troubleshooting page, which indicated that the tape safety device might be the root cause. I received additional advice suggesting that the issue could stem from one of the sensors within the VCR, possibly due to oxidized contacts causing intermittent operation. It was recommended to resolve this by carefully cleaning the contacts on the sensor switch responsible for detecting loaded tapes or the sensor that detects if the tape is "record-protected." Another suggestion was to monitor the output of these switches using an oscilloscope or voltmeter to determine if they are indeed the source of the problem.

I'm eager to hear if anyone has additional advice or personal experiences to share regarding this issue.

Additionally, I'm facing an AV cable problem where the yellow AV cable fails to display any video. While it used to work correctly, the AV audio cable still functions properly. As a temporary workaround, I've been using a coaxial cable and routing it through another VCR to utilize its AV output. However, I'm interested in exploring potential solutions to fix the issue with the yellow AV cable, if possible. Any insights or suggestions would be greatly appreciated.

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Sziasztok! A fenti Funai videónak az a hibája, hogy a menübe belépve szépen be lehet programozni az adókat, de kilépve a menüből már nem lehet a programokat előhívni. Bekapcsolni lehet, de a progr. számok már nem jönnek be, ennél fogva az adók sem. A menübe visszalépve ott vannak, rögzítette. Az órát nem felejti el, reseteltem is, de nem boldogulok vele Tudtok valami okosat? Üdv Attila
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Üdv!

A címben jelzett gép sem távval, sem a gombokkal nem indul.  A készenléti, és mindkét eject led világít.  A tápok rendben lévőnek tűnnek, mint feszültségre, mint szkóppal vizsgálva.  Resetre nem reagál, a kijelző sötét, áramalá helyezve.  A HD processzor órajele működik, egyéb " data/clok" jel nem észlelhető.  A szervó proci ad ki óra illetve data jelet,  a clock jelet földre téve a gép feléled.  Innen viszon kikapcsolni nem lehet. Mint a kazettát, mint a cd, dvd lemezt elfogadja, elindítja.  Kézzel távval kezeli, a kijelzőn megjeleníti a vcr műveleteket. Viszont sem képet sem hangot nem ad, a kazettát végigjátsza, visszatekeri, kiadja. FM jel nem mérhető, ctl jel van annak megszűnésére a fej, és a capstain motor fordulata változik.  A rajzát letöltöttem.  Ebben kérnék instrukciókat, a gépet úgy kaptam szeretném megtartani ha teljesen életre kel. Köszönöm a figyelmet!
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