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Alpine 3558 mute light stays orange in error
Alpine 3558 mute light stays orange in error
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Old 7th December 2018, 05:22 AM   #21
Hennesy is offline Hennesy  United States
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Join Date: Mar 2004
Location: Los Angeles
I just repaired mine Alpine 3558 with the same problem and I founded some capacitor that either shorted or leaking and causing the amp power supply to unbalanced and the result of the amp is in muting or protecting mode. I replaced E711, E712, E716 and some other caps around the IC701, IC801. I would recap the whole amp since you are digging inside the amp. Got my back working after just a few capacitor replacement. There's full set of service manual on line and I can send it too.
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Old 7th December 2018, 01:00 PM   #22
bmore5077 is offline bmore5077  United States
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Thanks Perry sent me a copy of the service manual. I am slowly figuring out what I'm doing..ha. thanks everyone for the help.
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Old 9th December 2018, 01:55 AM   #23
bmore5077 is offline bmore5077  United States
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Ok found ic 501 and 502. They were hidden under the components on one of the vertical boards. Pin 1 reads around 2 volts and then immediately drops to around 200mv and drains down.
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Old 9th December 2018, 02:21 AM   #24
bmore5077 is offline bmore5077  United States
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Definatly not 22volts
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Old 9th December 2018, 02:06 PM   #25
Perry Babin is offline Perry Babin  United States
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Measure the DC voltage with the black probe on pin 2 and the red probe on pin 1.
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Old Yesterday, 12:22 AM   #26
bmore5077 is offline bmore5077  United States
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I found some leaking capacitors as Hennesy suggested. Will replace those and see what happens. Thanks for the help
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