Advice please re: NAD 7220PE fix

marknyc8 · 10th June 2011, 07:40 PM

Hi everyone. First off, I'm new here. Second, I inherited my family's old old receiver, which (of course) has a serious problem: the tuner power transformer is no longer functioning, according the repair shop I sent it to. Evidently, this part is no longer available from NAD (proprietary part, as well). Everything else seems to work fine (i.e., power supply, etc.); it just won't operate the tuner or lights. I'd love to keep the unit and have a shot at repairing it.

Any advice? Is there anywhere to pick up spares of these parts?

Thanks in advance!

Bill_P · 10th June 2011, 08:43 PM

The service manual is available at NAD 7020E 7220PE Service Manual free download, schematics, eeprom, repair info for electronics

The transformer looks like an ordinary 12.6 VAC at around 1 amp. Any transformer with those ratings that fits in the unit should work. Check the transformer output voltage before going to the trouble of buying a new one to confirm that it is really bad.

marknyc8 · 10th June 2011, 08:52 PM

...told me it was an NAD brand tuner power transformer...he even gave me the part number. I did download a repair manual so I can locate the part (have done so)...but how important is it to get the NAD brand transformer? He made it sound like it was essential (and said NAD no longer sells the part)...hmmm...

(sorry, I'm new at all this) :-)

marknyc8 · 10th June 2011, 08:54 PM

The tech told me it was an NAD brand tuner power transformer...he even gave me the part number. I did download a repair manual so I can locate the part (have done so)...but how important is it to get the NAD brand transformer? He made it sound like it was essential (and said NAD no longer sells the part)...hmmm...

(sorry, I'm new at all this...so thanks for your patience) :-)

Bill_P · 10th June 2011, 10:46 PM

It is not necessary to locate the exact NAD part. These kinds of transformers are quite common. Find a 12.6 VAC transformer that fits in the space allocated and it will work. Judging from the bad imformation you were given by the repair person, it would be best to measure the output of the transformer with a voltmeter. Maybe it isn't bad after all.

marknyc8 · 10th June 2011, 11:19 PM

Fantastic. Thanks much. I'll give it a try (even tho I'm a novice)...worth a try!

10th June 2011, 07:40 PM	#1
marknyc8 diyAudio Member Join Date: Jun 2011	Advice please re: NAD 7220PE fix Hi everyone. First off, I'm new here. Second, I inherited my family's old old receiver, which (of course) has a serious problem: the tuner power transformer is no longer functioning, according the repair shop I sent it to. Evidently, this part is no longer available from NAD (proprietary part, as well). Everything else seems to work fine (i.e., power supply, etc.); it just won't operate the tuner or lights. I'd love to keep the unit and have a shot at repairing it. Any advice? Is there anywhere to pick up spares of these parts? Thanks in advance!

10th June 2011, 08:52 PM	#3
marknyc8 diyAudio Member Join Date: Jun 2011	the repair person... ...told me it was an NAD brand tuner power transformer...he even gave me the part number. I did download a repair manual so I can locate the part (have done so)...but how important is it to get the NAD brand transformer? He made it sound like it was essential (and said NAD no longer sells the part)...hmmm... (sorry, I'm new at all this) :-)

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10th June 2011, 08:43 PM	#2
Bill_P diyAudio Member Join Date: Sep 2009 Location: New York, the vampire state	The service manual is available at NAD 7020E 7220PE Service Manual free download, schematics, eeprom, repair info for electronics The transformer looks like an ordinary 12.6 VAC at around 1 amp. Any transformer with those ratings that fits in the unit should work. Check the transformer output voltage before going to the trouble of buying a new one to confirm that it is really bad.

10th June 2011, 08:54 PM	#4
marknyc8 diyAudio Member Join Date: Jun 2011	The tech told me it was an NAD brand tuner power transformer...he even gave me the part number. I did download a repair manual so I can locate the part (have done so)...but how important is it to get the NAD brand transformer? He made it sound like it was essential (and said NAD no longer sells the part)...hmmm... (sorry, I'm new at all this...so thanks for your patience) :-)

10th June 2011, 10:46 PM	#5
Bill_P diyAudio Member Join Date: Sep 2009 Location: New York, the vampire state	It is not necessary to locate the exact NAD part. These kinds of transformers are quite common. Find a 12.6 VAC transformer that fits in the space allocated and it will work. Judging from the bad imformation you were given by the repair person, it would be best to measure the output of the transformer with a voltmeter. Maybe it isn't bad after all.

10th June 2011, 11:19 PM	#6
marknyc8 diyAudio Member Join Date: Jun 2011	Fantastic. Thanks much. I'll give it a try (even tho I'm a novice)...worth a try!

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