Hi everyone, I'm Miguel111 and I have a radio and turntable of the GAKKEN brand (Japanese) with a serious buzzing problem when the engine is started, the discs are heard in the capsule but not in the speaker, the medium wave radio is going well, where do I start looking?
Thanks in advance for the help you can give me.
I think it has two PNP 2sb178 transistors
Is the power stage the same for the radio and the turntable? Does this take a preview before?
Touching the capsule only a very faint sound is perceived, revised wiring, the information they give me is that the batteries be put upside down, could this cause these damages?
you can try to inject audio from an external source, in the capsule cables, if the capsule is of the crystal type (Ronette) it is very likely that it does not work since it affects the humidity with the years, if it is of the ceramic type, no I think it is wrong, if the radio works the amplifier stage works, so rule out problems on that side, check the internal wiring of the arm, since the cables are very thin and can be cut, says what type of capsule brings or uploads a photo , Cheers
hello pr122, the wiring is checked, and the capsule is this.
To test if you have prior, could you put a cellphone radio signal from a cell phone through the needle wiring?
if you can do it, it starts with a small volume of the mobile, but I think, as you said that playing with the fingers there was amplification, although it is small, it may be because the device does not have much volume, this was done so that it consumes little current and the batteries last a little longer, if you have to replace the capsule, I would advise you to place a ceramic, since they adapt perfectly to the devices with glass capsule, always first check if you get spikes for it since they are very scarce, greetings and luck
