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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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Kenwood Stereo Receiver KR-5040 problem.
Today I bought a Kenwood receiver, CD player and two Bose Interaudio
4000 speakers for $50.00. I wanted the speakers for my shop system. The new equipment is in perfect physical condition. So good in fact I want to replace the Fisher stuff in the shop with this one. The seller told me there was no sound at all from any source. This happened once before but the receiver started working again on its own. I have looked for a schematic on the intenet without success. When power is applied everything looks normal. All indicators and the display work fine. Every function button also gives the proper indication. The remote control also works fine in all functions except motor driven volume control. The mute button seems to be working. Hard to tell with no sound though. Even the memory and preset buttons are working. Tuning and autotuning are working but the auto tune cycles continuously. Both A and B speaker buttons have been tried. The speakers are in like new condition. The case had never been opened until today. The bottom plate has not been removed. I suspect a power supply problem. The board has no marked test points but I do see one large full wave bridge and and two four diode arrays that are probably full wave bridges. Does anyone have a schematic showing voltage test points for this receiver? How is the control of the volume control motor done? One last point. When I removed the case I could see the volume control assembly was loose. The retaining nut wasn't tightened. Possibly that caused a loss of ground to the case. Now when I use the remote to adjust the volume control the mute lamp flashes but the motor does't start. Thanks in advance. Russ |
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Kenwood Stereo Receiver KR-5040 problem.
On Mon, 4 Aug 2003 12:17:10 -0400, "Leonard G. Caillouet"
wrote: I have a manual for a KR-A5040 (1992) if that is the unit you have, nothing on one w/o the A. Email me if you need it @ $10 + s/h. Leonard Caillouet "Russ Meredith" wrote in message .. . I sent an email to stating my interest in buying the KR-A5040 manual. Let me know where to send a M.O. Russ |
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