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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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Receiver battery backup via capacitor?
Hi I have a Marantz AV9000 DD preamp and whenever the power is
removed, all settings are lost and back to factory defaults. I have the service manual and there is no battery backup. However, there is a 1F 15v capacitor which seems to be involved in the backup function. My question is would such a capacitor fail after about 4 years? And does anyone know where I could find one? Thanks |
#2
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Receiver battery backup via capacitor?
"Tom" wrote in message m... Hi I have a Marantz AV9000 DD preamp and whenever the power is removed, all settings are lost and back to factory defaults. I have the service manual and there is no battery backup. However, there is a 1F 15v capacitor which seems to be involved in the backup function. My question is would such a capacitor fail after about 4 years? And does anyone know where I could find one? Thanks I've never had one fail, but it's certainly possible. Memory backup caps are readily available, though most of them are 5.5v. |
#3
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Receiver battery backup via capacitor?
Yes, I have had them fail at times, but it is rare. Most of these caps are
5.5 Volts or so. But, you may have to order a 15 Volt one from the manufacture directly, or from their authorized parts dealer, if you cannot find one generically. You can use your DVM to see if it is storing anything. After unplugging the receiver from the AC mains, put your DVM across the cap to see if it is holding charge. -- Greetings, Jerry Greenberg GLG Technologies GLG ========================================= WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm ========================================= "Tom" wrote in message m... Hi I have a Marantz AV9000 DD preamp and whenever the power is removed, all settings are lost and back to factory defaults. I have the service manual and there is no battery backup. However, there is a 1F 15v capacitor which seems to be involved in the backup function. My question is would such a capacitor fail after about 4 years? And does anyone know where I could find one? Thanks |
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