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Old 26th January 2004, 04:56 PM   #1
Raj1 is offline Raj1  United Kingdom
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Default anyone know of this regulator?

Hi,

I have a little regulator type device in my cd player which I think is blown. The device is similar in shape to a 78L05 type regulator (which the machine also has) but this device has only 2 pins it reads N10 with the letter M underneath. Any ideas as to what type of device this is and where I can get one.

Thanks
Raja
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Old 26th January 2004, 05:22 PM   #2
dhaen is offline dhaen  Europe
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If it's a TO92 package, it may be a fuse.
I don't know the nomenclature though, to determine the ratings.
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Old 26th January 2004, 05:26 PM   #3
Netlist is offline Netlist  Belgium
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It's more then probably a diode.
A possible replacement would be BA176.
You could have problems with cooling as BA176 is not TO220

/Hugo
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Old 26th January 2004, 05:32 PM   #4
Netlist is offline Netlist  Belgium
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Dhaen is probably correct.
I didn't notice the 78L05 is TO92.

Here's some data on the fuse: 0.4A / 50V / 0.22ohm.

/Hugo
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Old 26th January 2004, 05:34 PM   #5
dhaen is offline dhaen  Europe
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Oops,

I was thinking the 'L0x's were the TO92 type

Thanks Hugo
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Old 26th January 2004, 05:43 PM   #6
mcs is offline mcs  Denmark
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It could also be current regulator diode...

I would check a schematic or service manual before replacing it.

Best regards,

Mikkel C. Simonsen
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Old 26th January 2004, 05:46 PM   #7
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Their full name is ICP-N10 ( and N20 etc. indicating the max. current ) and they're made by Rohm. A lot of japanese brands use these electronic fuses. When they really break down something is seriously broken, normally they reset themselves after cooling down. I have seen some cases where they were chosen a bit too light, replacing them for a N20 was the solution.

www.rohm.com/products/databook/icp/pdf/icp.pdf
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Old 26th January 2004, 05:52 PM   #8
Raj1 is offline Raj1  United Kingdom
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Hi

thanks guys, yep you're right it definatley is some kind of fuse. I have jumpered across it after checking input and ouput voltages on my dmm. My fault it tripped was checking for noise on the supply with a scope, managed to short across the link wires - whoops. Works ok now anyway.


What are possible causes of hf noise with cdp's? I have a seperate tube output stage, and even with this totally disconnected there is quite a bit of hf hash on the analog outs (balanced) of the dac at the chip pins.

I have tried sheilding the dac chip itself with copper but this hasn't really helped. One thing I notice with the cd player connected is that there is more hf noise thru the tweeter of the speakers than any other component I have (video, cable tv etc). It's not so loud that it disturbs my listening, you have to be close to the spekers to notice at low volumes. Just trying to squeeze out that last mile of performance by making things as quiet as possible. I had an arcam cd 92 with the same issue. I really wouldn't have bothered too much if these cdp's were no noisier in the hf region than my other components.


Thanks
Raja
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Old 26th January 2004, 05:57 PM   #9
Netlist is offline Netlist  Belgium
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Quote:
Originally posted by dhaen

I was thinking the 'L0x's were the TO92 type
To me, when I see 78 in combination with 05 a TO220 device is the first thing that comes to mind. This was my misinterpretation

/Hugo
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