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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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Sony HT-5500D receiver problems
This unit will come on and the protection display will come on. I have
had the volume turned down and I have checked the speakers for any problems. I have even checked all the output transistors and various components around the outputs. Has anyone run into this problem with this unit? Would anyone have a schematic or service manual that they could email me? Thanks, Rob |
#2
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Sony HT-5500D receiver problems
"rob34" wrote in message
... This unit will come on and the protection display will come on. I have had the volume turned down and I have checked the speakers for any problems. I have even checked all the output transistors and various components around the outputs. Has anyone run into this problem with this unit? Would anyone have a schematic or service manual that they could email me? Thanks, Rob The receiver portion of this system is the STR-K840P. If the outputs are OK, the most likely culprit is IC501, an STK350-230. You should measure DC with respect to ground from the center of each emitter resistor to confirm a DC offset. Most of the amp channels use UPC series drivers which are quite reliable, the one channel using the STK is a frequent offender. Sony won't allow me to distribute their service literature. Mark Z. |
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