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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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#1
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Harmon Kardon receiver.
Model # AVR-10, has raw B+ plus & minus, @ turn on, but display is
totally black, & unit is otherwise dead. Outputs all check fine, nothing shorted, or open, there isn't a relay, or control transformer. Anyone see this problem? dani. |
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#2
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Harmon Kardon receiver.
"Dani" wrote in message ups.com... Model # AVR-10, has raw B+ plus & minus, @ turn on, but display is totally black, & unit is otherwise dead. Outputs all check fine, nothing shorted, or open, there isn't a relay, or control transformer. Anyone see this problem? dani. There is a service bulletin for this symptom - though I'm a bit skeptical after reading it. There is an LC7821 input select IC near the right rear corner of the main pcb which they say causes this problem. Maybe it loads down a regulated power supply line. I can send you the manual and service bulletin in PDF form. You'll need Win RAR to reassemble the service manual chunks. Mark Z. |
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