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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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Rotel Receiver keeps blowing fuses
Rotel model RA-920AX receiver. Seems to run great, but every few weeks it
blows one or both speaker fuses (4A). Completely random, just blows them whenever it feels like it, sometimes one fuse, sometimes both. My guess is that it's trying to feed a pure DC signal into the speakers, but I can't figure out why. There's only one IC in the unit (NTE858M), used in the pre-amp section, could this be the trouble? Any advice would be appreciated. -- ********* Reply to: ********* |
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Rotel Receiver keeps blowing fuses
Chris F:
Before I would start replacing parts to try to solve this "random intermittent" problem I would first go over the main pcb and visually inspect all the solder connections, especially near and around the high heat producing components such as power resistors, diodes, transistors, etc..... re-solder any and all suspect solder joints. If you are still having problems..... be sure to inspect your speaker connections at the amp and at the speakers..... also inspect any splices in the speaker wires...... temporarily try another set of speakers.... etc. Try running the amp with just one set of speakers if you have two sets hooked up to it. -- Best Regards, Daniel Sofie Electronics Supply & Repair ------------------------------------------- "Chris F." wrote in message Rotel model RA-920AX receiver. Seems to run great, but every few weeks it blows one or both speaker fuses (4A). Completely random, just blows them whenever it feels like it, sometimes one fuse, sometimes both. My guess is that it's trying to feed a pure DC signal into the speakers, but I can't figure out why. There's only one IC in the unit (NTE858M), used in the pre-amp section, could this be the trouble? Any advice would be appreciated. |
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