Thanks for the help. i've never really done repairs, so i'll need a little guidance. is there any site where i can find some sort of schematics or guide for opening up the receiver and locating these parts? or, any tips for where i might purchase replacement parts (volume control switch)?
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Re: yamaha rx-v1200 volume control
If you are not really that technical type that can make repairs then it will be very hard for you to replace it yourself. not hard to find the volume control, it is mounted on a board. you dismantle the board first then remove desolder the volume control. it think you can onyl get the parts from yamaha service.
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check ur speaker wires, try disconnect all wires from back of unit and then try to turn on unit .if it stays on whit no wires attached than u have short connection at speaker wires . if doesn`t come on then try to fasten screws at back of the unit , may sound like BS but if amp board don`t have good ground connection it can go in protection mode happened to me on RX-V592
hi i have the same problem. yamaha rx-v870 with a remote control that works perfectly except for the volume up/down. i pressed the buttons for a minute and applied some lemon gunk remover liquid and this helped for a very short period. i am wondering if the problem is with the little motor inside the receiver that rotates the volume knob itself, as opposed to an infrared problem on the transmitter/receiver.
It sounds like the volume control pod has gone bad and needs replaced (The knob shaft connects to the pod main body and the inside of the volume pod is what controls the rate of volume,If the inside becomes worn ,broken or dirty the volume will become erratic) Replace volume pod ! ..You may try cleaning by taking off the volume knob and getting a can of pressure air and blowing the dust out!
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if you know how to repair, then replace the volume control switch. it is a digital type/mechanical type of switch with silicone oil on it to prevent sudden turn of volume. if i were the repairman i can simply clean the contacts of the volume control and pour silicon oil again. but i really dont know in your area if they try to clean those.
just connect your subwoofer mono RCA to your amp sub single out rca connector. you do not need to megre all those 4terminals into one. in fact internal circuit of those 4rca are merging inside to one since the sub uses only a single amp. 4inputs was meant for sources with multiple sub out