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Bose 7 channel car amp model:143158 no audio output

1992 Mercedes diesel 300SD Bose 7 speaker car amp model:143158 amp assembly=Beta W-140.The audio became statically and low almost completely muted,upon troubleshooting I found F1=10 amp pico fuse open,all 7 channels have their own pcb board which is soldered into the double sided main board so I cannot isolate the problem. Anyone have any common repair tips for me? and maybe a schematic?.Thanks.

Sidney E-mail:sidneybek(at)yahoo.com Dartmouth,Nova Scotia Canada

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sidneybek
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Would only ground pin for each channel board cause F1=10 amp pico fuse to open? as that would cause the VCC (B+) for each channel to become intermittent.As I took my Fluke DMM series II model:29 and compared each channel board and they all measured the same as each meaning I measured each pin on every board with respect to ground.

Sidney Dartmouth,Nova Scotia Canada

assembly=Beta W-140.The audio became statically and low almost completely muted,upon troubleshooting I found F1=10 amp pico fuse open,all 7 channels have their own pcb board which is soldered into the double sided main board so I cannot isolate the problem. Anyone have any common repair tips for me? and maybe a schematic?.Thanks.

Sidney E-mail:sidneybek(at)yahoo.com Dartmouth,Nova Scotia Canada

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(\__/) (='.'=) (")_(")

This is Bunny.Copy and paste bunny into your signature to help him gain world domination.

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sidneybek

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