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Yamaha Laserdisc Karaoke CDV-1200K NO POWER

I have an old, classic Yamaha Laserdisc with Karaoke function built in, model CDV-1200K which just given to me by a friend for collection. However, there's no power indications or whatsoever, none of the LEDs lid up.... I did make sure it's switched to 120V (120V or 220V selector). I did attempt to open up the case but couldn't couldn't verify whether the power transformer is still alive or not as I don't have the schematic diagram. There're 4 wires going from the transformer to the power distribution circuitry; which I believe 2 of them for DC stepped down power and 2 for close-loop or some other signalings....but I have no way of verifying the power source... does anybody have any clues ? Please help............... Thanks and much appreciate upfront.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Ron-C
  • 5 Answers

SOURCE: standby power switch

If you are concerned about humidity and switches, spray them with DeOxit. You can get it at Radio Shack.

Posted on Jul 14, 2007

  • 236 Answers

SOURCE: protection of yamaha pc 2002

time delay... i dont know...seems unusual. the protection system of all yamaha PA and A/V is driven at teh same time not discrete so i dont understand why 1will be active earlier and the other delayed. in any case, a delay in relay activation is unstable center violtage or you are having an abnormal output stage, it is prducing more than 0.1 volts DC. this is primarily caused by unbalanced biased input initial stage of the main amp, voltage stability is not accurate. Or grounding getting poor.

redrivera

Posted on Mar 19, 2008

  • 85 Answers

SOURCE: where i could find the

A common problem on these amps ie no sound is due to dirty switches and tone contols,amp face needs taking off and contact cleaner needs spraying into all controls...

Posted on Jan 15, 2009

tech240
  • 169 Answers

SOURCE: need schematic diagram of YAMAHA P7000S

Best find your local dealer as cd are not usually supplied to end users.

Posted on Sep 20, 2009

petraman7
  • 1175 Answers

SOURCE: Yamaha Amp DSP A-3090 Power/function/Remote

These issues can only be fixed by an audio-tech.

Do a websearch around your area for a repair person

Posted on Nov 04, 2009

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http://dl.owneriq.net/d/d7412619-cea1-4119-965a-e343e67cb81f.pdf

that is a link to your manual.

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