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MR-74 FM dead, AM works

71.212.154.8
Posted on August 19, 2015 at 07:45:03
Grinnell
Audiophile

Posts: 709
Location: Front Range
Joined: December 23, 2007
 So woke up, got out of bed, turned my tuner on and no sound. Fiddle with cables switch boxes etc. Got it to work on AM.

any thoughts ?

TIA

karl

 

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RE: MR-74 FM dead, AM works, posted on August 19, 2015 at 10:40:35
6bq5
Audiophile

Posts: 4391
Location: SF Bay
Joined: August 16, 2001
 HiFi Engine has a service manual for the MR-74
I can't think of what might have happened- other than a cap opening up - or a resistor-
Antenna connection still good?

Happy Listening

 

RE: MR-74 FM dead, AM works, posted on August 19, 2015 at 17:09:50
Awe-d-o-file
Dealer

Posts: 21037
Location: 50 miles west of DC
Joined: January 10, 2004
 Other than something wrong inside that might happen if the FM antenna fell off and the muting is on which would only let strong signals by it which may no longer exist if the antenna fell off.


E
T

ET

"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936

 

RE: MR-74 FM dead, AM works, posted on August 19, 2015 at 19:15:56
Grinnell
Audiophile

Posts: 709
Location: Front Range
Joined: December 23, 2007
 I check the antenna connections at the tuner, will go up and chk in the attic. could be a cap

 

RE: MR-74 FM dead, AM works, posted on August 20, 2015 at 06:06:56
Grinnell
Audiophile

Posts: 709
Location: Front Range
Joined: December 23, 2007
 Got up, turned it on it works.

bad cap?

 

RE: MR-74 FM dead, AM works, posted on August 20, 2015 at 08:56:29
6bq5
Audiophile

Posts: 4391
Location: SF Bay
Joined: August 16, 2001
 maybe a 'cold solder joint' - that intermittently opens...
that will be tough to find...
Happy Listening

 

Sounds like it needs a shop visit, , posted on August 20, 2015 at 14:47:32
Timbo in Oz
Audiophile

Posts: 23221
Location: Canberra - in the ACT - SE Australia
Joined: January 30, 2002
 still.



Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger


 

RE: Sounds like it needs a shop visit, , posted on August 21, 2015 at 07:39:39
Grinnell
Audiophile

Posts: 709
Location: Front Range
Joined: December 23, 2007
 I got this to replace the MR67 while it was sent off. havent sent the MR67 off. need to do that then get this in for CLA

 

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