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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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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 O |\ __O _|_| \ (\__/) (='.'=) (")_(") This is Bunny.Copy and paste bunny into your signature to help him gain world domination. |
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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 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 O |\ __O _|_| \ (\__/) (='.'=) (")_(") This is Bunny.Copy and paste bunny into your signature to help him gain world domination. |
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