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Old 25th August 2006, 08:09 AM   #11
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Wink 2N5551

Hello Granny
The transistor in question should do fine provided it is a TO-92 package. If you still need further assurance go to www.mouser.com and search for 2N5551 there are several choices with techdata.
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Old 25th August 2006, 08:53 AM   #12
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Smile Re: 2N5551

Quote:
Originally posted by XEAGLEKEEPER
Hello Granny
The transistor in question should do fine provided it is a TO-92 package. If you still need further assurance go to www.mouser.com and search for 2N5551 there are several choices with techdata.

Thank you very much for the info and taking the time to help me out. I will post an update when I have replaced the transistor.

Many thanks.
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Old 25th August 2006, 03:16 PM   #13
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Wink 2N5551

I looked up a specsheet at www.mouser.com for the 2n5551 they have 3 or 4 different mouser part #'s but all have the same specs. A TO-92 case style 160v. I would have no problem subbing the 2N5551.
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Old 25th August 2006, 03:37 PM   #14
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Yamaha+2N****?? Does it really call for that in the service manual?? That's a bit unusual for Yamaha. They usually stuck with Japanese numbered (2S, 2SB, 2SC, 2SD, 2SJ, 2SK, etc) parts. I'm not trying to cause a problem, but it looks like things have changed for Yamaha.
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Old 26th August 2006, 05:58 AM   #15
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Quote:
Originally posted by mrshow4u
Yamaha+2N****?? Does it really call for that in the service manual?? That's a bit unusual for Yamaha. They usually stuck with Japanese numbered (2S, 2SB, 2SC, 2SD, 2SJ, 2SK, etc) parts. I'm not trying to cause a problem, but it looks like things have changed for Yamaha.

Yes, that's what's listed in the service manual.
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Old 26th August 2006, 07:56 AM   #16
clem_o is offline clem_o  Philippines
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A glowing example of globalization. China-made 2N5551 cheaper than almost anything else you can find... except maybe a china-made 2N2222...
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Cheers!
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Old 26th August 2006, 04:03 PM   #17
Leolabs is offline Leolabs  Malaysia
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Quote:
Originally posted by grannysmith
The original transistor is a 2N5551C-AT but I can only find a 2N5551.

Can anybody help with regard to the suitability please?

Many thanks,

Alan.
If the transistor is operated as differential amp,then replace both.
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Old 26th August 2006, 10:21 PM   #18
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OK, replacing the transistor didn't make any difference, so I need to supply a few more details:

The speakers that are normally connected are 6 ohm.

The speakers that I have been using for testing it are 8 ohm.

When the 8ohm speakers are connected there is sound from both channels but the faulty channel is distorted.

If the original speakers are connected then there is only the occasional noise from the faulty channel.

Does this help at all?

Thanks.
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Old 27th August 2006, 03:17 AM   #19
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Hello Granny
On the rear of my HTR 5560 there is a switch that must be in the 8 ohm or 6ohm position (depending on speakers used )and should not be changed from 6or8 with power applied.This may not be your problem but It won't cost anything to investigate.
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Old 27th August 2006, 11:08 AM   #20
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Quote:
Originally posted by XEAGLEKEEPER
Hello Granny
On the rear of my HTR 5560 there is a switch that must be in the 8 ohm or 6ohm position (depending on speakers used )and should not be changed from 6or8 with power applied.This may not be your problem but It won't cost anything to investigate.

There's a switch on my amp also. I can confirm that it was set correctly (with the power off) for each set of speakers.
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