PROTON 550 STEREO AMPLIFIER is in protection mode when turned on, no speakers connected, volume down.
I was gonna take it in the shop for repair, but I was curious if anyone had the same experience with this model or maybe i might find it was just cold solder or a blown transistor. I see four large ones, two Sanken 2SC2921 and two Sanken 2SA1215, but can they be tested while in circuit? Do I have to unsolder them?
I was gonna take it in the shop for repair, but I was curious if anyone had the same experience with this model or maybe i might find it was just cold solder or a blown transistor. I see four large ones, two Sanken 2SC2921 and two Sanken 2SA1215, but can they be tested while in circuit? Do I have to unsolder them?
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