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Old 25th June 2015, 08:50 AM   #1
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Default Marantz pm57

Morning all,a mate has a Marantz pm57 with an intermittent left channel.
Any common faults?
Ta.
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Old 25th June 2015, 01:19 PM   #2
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poor soldering and output relay is the only problems i have seen in those amps
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SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
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Old 25th June 2015, 01:57 PM   #3
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Thank you,very helpful,my friend does say if he turns the amp off then on again the channel works!
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Old 25th June 2015, 02:16 PM   #4
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correct but the best indication for a faulty relay is that :
At the time of failure if you crank the volume up then the faulty ch will play again
check both , replace relay and observe poor soldering Look carefully on the sides of the board also

Kind regards
Sakis
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SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
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Old 25th June 2015, 02:36 PM   #5
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Thanks Sakis,of course when I looked at the amp it worked!
I will report back when I look at the amp next time.
Kr,Barry.[aka dave Friday]
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