Home |
Search |
Today's Posts |
|
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. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Receiver loses one channel
I have an old Toshiba SA-5000 receiver. It has two "Tape" inputs. "Tape1" is
having a problem. More often than not, it always loses the left channel when the receiver is powered up. If I switch the selector knob back and forth quickly a few times between "Tape1" and "Source", the left channel might come back OK, but then after a while, it will lose the signal again. Everything else seems to be working fine. Could it be just a simple oxide-related "contact" problem at the selector knob, or is it more likely to be caused by some failing transistor(s) and/or capacitor(s)? Could you recommend a good brand of contact cleaner? I have no experience in repairing amplifiers and receivers, but I do have some working knowledge with electronics--mostly digital computer circuits. I would appreciate any suggestion as to possible causes of this type of circuit misbehavior to get me in the right troubleshooting direction. Thanks Al-U |
#2
|
|||
|
|||
Receiver loses one channel
You are most likely right about the contact problem. Clean all controls with
a good spray cleaner. I have found that the older units need the real good stuff like Caig De-Oxit Red. It's a little expensive, but the cheaper stuff doesn't last very long. "alpha_uma" wrote in message news:JCfLc.69815$od7.56604@pd7tw3no... I have an old Toshiba SA-5000 receiver. It has two "Tape" inputs. "Tape1" is having a problem. More often than not, it always loses the left channel when the receiver is powered up. If I switch the selector knob back and forth quickly a few times between "Tape1" and "Source", the left channel might come back OK, but then after a while, it will lose the signal again. Everything else seems to be working fine. Could it be just a simple oxide-related "contact" problem at the selector knob, or is it more likely to be caused by some failing transistor(s) and/or capacitor(s)? Could you recommend a good brand of contact cleaner? I have no experience in repairing amplifiers and receivers, but I do have some working knowledge with electronics--mostly digital computer circuits. I would appreciate any suggestion as to possible causes of this type of circuit misbehavior to get me in the right troubleshooting direction. Thanks Al-U |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Left channel disappear...PSB Board for Yamaha RX-V1 receiver. | Electronics Repair | |||
Channel 3 fizzed out | Electronics Repair | |||
static on right channel of kenwood receiver | Electronics Repair | |||
Static in left channel on vintage Marantz 2240 Receiver | Electronics Repair |