Question about Panasonic SA-HE90 Receiver
FIRST IMPRESSIONS: OVERHEATING.
EXAMINE VENTS ON UNIT FOR SIGNS OF LINT/DUST/ANIMAL HAIRS; EVEN IF NONE FOUND, IF YOU CAN BLOW OUT THE UNIT WITH COMPRESSED AIR (CAREFULLY) THAT COULD HELP. MAKE SURE THERE IS OPPORTUNITY FOR AIR CIRCULATION AROUND WHERE THE UNIT IS INSTALLED.
ALSO, MAKE SURE NO FRAYED SPEAKER WIRES OR ANY OPPORTUNITY THAT SOME ARE SHORTED. PUT YOUR EAR CLOSE TO EACH SPEAKER TO VERIFY THAT SOUND IS COMING OUT AND THAT IT'S NORMAL.
IF THE WIRES ARE OK BUT THERE IS ANY SPEAKER WITH A BUZZ OR ODD SOUNDS OR DISTORTION IT'S PROBABLY A FINAL AMP STAGE IN THE UNIT; THAT SPELLS REPAIR.
YOU CAN ALSO PUT AN OHMETER ON THE SPEAKERS IF YOU HAVE ONE; THEY ALL SHOULD BE ABOUT THE SAME, BUT TYPICALLY WITH A RANGE OF ABOUT 3-16 OHMS EACH.
IF YOU CONNECT ANY SMALL BATTERY, SUCH AS A DOUBLE A, TO THE SPEAKER WIRES AFTER DISCONNECTING FROM THE UNIT YOU SHOULD HEAR POPPING SOUNDS IN THEM. IF YOU DON'T, THE SPEAKER OR THE WIRE TO IT IS DEFECTIVE.
IF ALL THIS FAILS, YOU MAY BE LOOKING AT A LIVE TECH BENCH JOB
Posted on Jan 21, 2008
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Posted on Jan 02, 2017
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