Hello!
I have a Philips FP146 turntable from the '90s!
Yesterday I tried to use it after at least a decade. It didn't work. I opened it and I realized that its AC adapter is not working properly.
The name and serial key of its adapter is:
AMC 8549
3111 158 30050
Is there any possibility that I can find its technical info in order to replace it with a new one?
The only informations I can find about on the turntables are:
220V, 50Hz, 14W
Thanks in advance!
I have a Philips FP146 turntable from the '90s!
Yesterday I tried to use it after at least a decade. It didn't work. I opened it and I realized that its AC adapter is not working properly.
The name and serial key of its adapter is:
AMC 8549
3111 158 30050
Is there any possibility that I can find its technical info in order to replace it with a new one?
The only informations I can find about on the turntables are:
220V, 50Hz, 14W
Thanks in advance!
Somewhere on the adapter it should (I would have thought) give the voltage and whether its AC or DC output. The 3111 bit sounds like a Philips part number.
Maybe close up pictures would help.
Are you sure the adapter is faulty ? Maybe a cable break or problem with the connector. Getting a new adapter should be easy as long as we know the voltage, the polarity and whether its AC or DC.
If you don't get much response I can move this over to "power supplies" forum.
Maybe close up pictures would help.
Are you sure the adapter is faulty ? Maybe a cable break or problem with the connector. Getting a new adapter should be easy as long as we know the voltage, the polarity and whether its AC or DC.
If you don't get much response I can move this over to "power supplies" forum.
I was thinking of a little "wall wart" when you said adapter.
That's a simple mains transformer with one secondary. Is it open circuit on the mains input side ? Many have a thermal fuse embedded in the windings. Check the winding on a meter on ohms range, It should read low resistance across the mains input side.
That's a simple mains transformer with one secondary. Is it open circuit on the mains input side ? Many have a thermal fuse embedded in the windings. Check the winding on a meter on ohms range, It should read low resistance across the mains input side.
More info... if you look where the secondary connects in the TT you will find either a single diode rectifier or a bridge rectifier. Close to this will be a "large" electrolytic capacitor. If you look at the voltage rating of the cap we can work backwards to deduce a reasonable ball park figure for the transformer voltage.
If the thermal fuse is open circuit then there is always the possibility that a fault (such as a shorted rectifier etc has caused the tranny to overheat. It may or may not be just a faulty transformer.
If the thermal fuse is open circuit then there is always the possibility that a fault (such as a shorted rectifier etc has caused the tranny to overheat. It may or may not be just a faulty transformer.
You can download the service manual at:
70FP146 Service manual
The transformer feeds a very simple power supply consisting of a bridge rectifier and reservoir capacitor. Output voltages are an unregulated 15VDC and 8VDC regulated via a voltage regulator IC.
So any transformer giving approx. 15VDC after rectification will do.
Rundmaus
70FP146 Service manual
The transformer feeds a very simple power supply consisting of a bridge rectifier and reservoir capacitor. Output voltages are an unregulated 15VDC and 8VDC regulated via a voltage regulator IC.
So any transformer giving approx. 15VDC after rectification will do.
Rundmaus
I'd normally suggest a component retailer (which depends where in the world you are of course).
For example,
CTFC12-9 - CAMDENBOSS - TRANSFORMER, 12VA, 2 X 9V | CPC
My worry is that there is possibly a fault with the turntable that caused failure of the transformer.
Normally some basic tests would be done on the transformer first. Are you 100% its faulty ? and that that alone is the problem ?
I haven't actually downloaded the service manual but based on the 15 volts DC mentioned earlier suggests a transformer of around 9 to 12 volts AC. Small transformers have a poor regulation factor. That means when lightly loaded the output can be considerably higher so a 9 volt tranny could give nearer 10 volts. And its all regulated back down to 8 volts again anyway.
Knowing the approx physical dimensions of your tranny would help too in selecting a replacement. We need as much info as possible to make an informed choice
For example,
CTFC12-9 - CAMDENBOSS - TRANSFORMER, 12VA, 2 X 9V | CPC
My worry is that there is possibly a fault with the turntable that caused failure of the transformer.
Normally some basic tests would be done on the transformer first. Are you 100% its faulty ? and that that alone is the problem ?
I haven't actually downloaded the service manual but based on the 15 volts DC mentioned earlier suggests a transformer of around 9 to 12 volts AC. Small transformers have a poor regulation factor. That means when lightly loaded the output can be considerably higher so a 9 volt tranny could give nearer 10 volts. And its all regulated back down to 8 volts again anyway.
Knowing the approx physical dimensions of your tranny would help too in selecting a replacement. We need as much info as possible to make an informed choice
I'm just looking at the manual now... taken at face value I'd say it was a 12 volt tranny.
For example,
CTFC20-12 - CAMDENBOSS - TRANSFORMER, 20VA, 2 X 12V | CPC
For example,
CTFC20-12 - CAMDENBOSS - TRANSFORMER, 20VA, 2 X 12V | CPC
You should be able to get away with any 30 or 50VA 12V transformer.
Toroidals are more common these days..http://www.ebay.co.uk/itm/30VA-2X12...al_Components_Supplies_ET&hash=item2ec76bd67b.. but if you really want an EI type I'm sure they can be had.
Here's one of many.
http://www.ebay.co.uk/itm/30VA-E-Sq...mplifier_Parts_Components&hash=item19cf301262
Toroidals are more common these days..http://www.ebay.co.uk/itm/30VA-2X12...al_Components_Supplies_ET&hash=item2ec76bd67b.. but if you really want an EI type I'm sure they can be had.
Here's one of many.
http://www.ebay.co.uk/itm/30VA-E-Sq...mplifier_Parts_Components&hash=item19cf301262
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Knowing the approx physical dimensions of your tranny would help too in selecting a replacement. We need as much info as possible to make an informed choice
Here!
Attachments
I've just spotted a 630 ma fuse on the secondary side so its really low powered, probably around 10 to 15 VA.
George... all that means is the transformer can be a small physical size.
For CPC - look at Farnell element14 | Electronic Component Distributors, CPC are their trade counter suppliers. http://www.rs_online.com also deal with Joe the public and have an enormous range of transformers.
As long as you realise that the minimum (smallest) specification will be about 10VA, anything with a higher VA rating will do the job.
http://www.ebay.co.uk/itm/12V-10VA-...al_Components_Supplies_ET&hash=item2c6ec754c0
As long as you realise that the minimum (smallest) specification will be about 10VA, anything with a higher VA rating will do the job.
http://www.ebay.co.uk/itm/12V-10VA-...al_Components_Supplies_ET&hash=item2c6ec754c0
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Would something like this fit. All the dimensions are shown on the product details.
CTFC12-12 - CAMDENBOSS - TRANSFORMER, 12VA, 2 X 12V | CPC
Small toroidals are another option,
MCFM50/12 - MULTICOMP - MINI-TOROIDAL, 5VA 2X 12V | CPC
I'll have to leave it for now... but are you sure the old one is faulty ?
Edit CPC are doing free delivery at the moment... you have to follow the instructions on the main page.
CTFC12-12 - CAMDENBOSS - TRANSFORMER, 12VA, 2 X 12V | CPC
Small toroidals are another option,
MCFM50/12 - MULTICOMP - MINI-TOROIDAL, 5VA 2X 12V | CPC
I'll have to leave it for now... but are you sure the old one is faulty ?
Edit CPC are doing free delivery at the moment... you have to follow the instructions on the main page.
I don't know whats its name in English, so I'll post an image.
While I was trying to figure out what caused the problem, I found that this
An externally hosted image should be here but it was not working when we last tested it.
was burnt. So, I changed it and tried to open the Turntable on again, but it burnt the new one too. I disconnected everything from the AC except the ON/OFF board. I changed the on/off button, tried to open it, and I had the same problem. So, what else may cause the problem?
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