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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Harman/Kardon HK3370 Tuner Hum
The tuner will hum real loud when the the unit is cold but it won't be as
loud as the receiver or the room heats up. The hum sounds like power line hum and it's the same rather it's on AM or FM. What happened? What could cause such a thing? It just started doing it all of the sudden but it is just the tuner, all the other inputs (CD, AUX, Tape Monitor) do not have the problem. |
#2
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Harman/Kardon HK3370 Tuner Hum
Possibly a bad power supply capacitor.
Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Robert Nogo" wrote in message news:ZtLIb.35831$gN.33637@fed1read05... The tuner will hum real loud when the the unit is cold but it won't be as loud as the receiver or the room heats up. The hum sounds like power line hum and it's the same rather it's on AM or FM. What happened? What could cause such a thing? It just started doing it all of the sudden but it is just the tuner, all the other inputs (CD, AUX, Tape Monitor) do not have the problem. |
#3
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Harman/Kardon HK3370 Tuner Hum
There could be a bad electrolytic in the AM FM IF section. I've seen cap
problems in the pre-amp sections of Harmon Kardon in the past. "Mark D. Zacharias" wrote in message ... Possibly a bad power supply capacitor. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Robert Nogo" wrote in message news:ZtLIb.35831$gN.33637@fed1read05... The tuner will hum real loud when the the unit is cold but it won't be as loud as the receiver or the room heats up. The hum sounds like power line hum and it's the same rather it's on AM or FM. What happened? What could cause such a thing? It just started doing it all of the sudden but it is just the tuner, all the other inputs (CD, AUX, Tape Monitor) do not have the problem. |
#4
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Harman/Kardon HK3370 Tuner Hum
Defective filter caps or bypass caps in the power supply, or along the
distribution in the unit. -- Greetings, Jerry Greenberg GLG Technologies GLG ========================================= WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm ========================================= "Robert Nogo" wrote in message news:ZtLIb.35831$gN.33637@fed1read05... The tuner will hum real loud when the the unit is cold but it won't be as loud as the receiver or the room heats up. The hum sounds like power line hum and it's the same rather it's on AM or FM. What happened? What could cause such a thing? It just started doing it all of the sudden but it is just the tuner, all the other inputs (CD, AUX, Tape Monitor) do not have the problem. |
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