Service manuals, schematics, eproms for electrical technicians


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PIONEER BDP-440 RRV4305 service manual (1st page)
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PIONEER BDP-440 RRV4305 service manual (2nd page)
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    PIONEER BDP-440 BDP440 RRV4305 BDP 440 RRV 4305
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  • See related repair forum topics below. May be help you to repair.
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Relevant VIDEO-DVD forum topics:
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.

Panasonic NV-HD100EG video bontása
Sziasztok! Ez volna: Sajnos elég hiányos. Nem akarnám darabokra szedni mielőtt meg nem kérdezlek titeket, h. így egyben tudtok-e valamit használni belőle? Felújítani sztem ilyen állapotban szinte esélytelen :( Szalagkábelét is kitépték, elviekben az kuka benne... Üdv: Pityesz
FUNAI 31D-250 kiadáskor nem húzza vissza a szalagot ( Kész )
Sziasztok! Ezzel a videóval az a gondom hogy nem húzza vissza a szalagot, amikor kiadja a kazettát. A kuplungnál nyújtottam a rúgón de semmi változás, és még kipucoltam a mód kapcsolót is. Lejátszás közben is gyengén viszi a szalagot, de még jó, gyors tekerésnél jó. Mit nem vettem észre?
1SS244 dióda helyettesítése Sanyo VHR-5100EE készülékben. (megoldva)
Ismerős ismerősének a szomszédjának ismerőse hozta ezt a készüléket. "Szokásos" módon ette meg a kifolyt kondi a többi alkatrészt, így a nevezett diódát is. Nagyon régen nem volt már kezeim közt ilyen video, egyszerűen nem rémlik milyen diódákat raktam ezek helyett.. valaki esetleg emlékszik rá melyik 1N(?).. jó oda?
Köszönettel: Kiss Z.
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