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Old 10th February 2011, 12:31 PM   #1
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Default Phillps CD-840, multi voltage tranformer needed

I have some equipment that made it's way Stateside when I moved from London, England to NJ, USA. It consisted of :

Rega Planar 2 turntable
NAD 3240 amplifier
Philips CD840 CD player
Aiwa AD-F640 cassette deck
Denon TU-380RD tuner

The Rega, Aiwa and NAD I have already taken care of. I would like to convert the Philips (and Denon) over to run on 110v.

I recently downloaded a service manual for the Philips CD player. According to this, the power transformer should have multiple primary taps to select different voltages. However, when I powered the player up using 240v, there was no voltage present on the other terminals soldered into the PCB, so I must assume it only has a single voltage primary transformer installed.

Click the image to open in full size.

What I need is either the transformer from a US spec model, or one from a European model that is multi-tapped. I believe they were sold under the Magnavox brand over here, but I've only ever seen one other.

The Denon tuner, who knows? I don't think it was sold outside of Europe, mine says "made in Germany" on the carton.

Yes, I know I could use a step-up transformer, indeed I've seen several suitable types looking through my Allied Electronics catalogue. It's just I'd rather get an original transformer if I can. I've tried contacting Philips both in Europe and the US, but to no avail.

Lee.
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Old 10th February 2011, 04:55 PM   #2
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For 240V the coils are series connected, for 120V are parallel connected.
Do you have a picture of the transformer?

I don't know how did you "measure" the other terminals - carefull to measure just the primary, don't connect the meter between a primary pin and a secondary one!
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Old 10th February 2011, 09:06 PM   #3
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Quote:
Originally Posted by SoNic_real_one View Post
For 240V the coils are series connected, for 120V are parallel connected.
Well, they would be if it was a dual primary tranformer, look at the schematic, it shows a multi-tapped one. Mine doesn't even have this, just two connections (three if you count the thermal fuse).

Quote:
Originally Posted by SoNic_real_one View Post
I don't know how did you "measure" the other terminals
With a voltmeter. The service manual shows clearly what pins are for the primary.
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