Thanks for replies again.
The yellow and white wires are for built in antenna and external antenna. As you seem to have enough signal strength it points towards the Mono Stereo Switch.
It could be that, but it does work correctly for tape operation.
RT301 is the FM separation adjustment. That's where I'd start. Measure the resistance across the ends of the pot and see if you read 1K ohms.
I'll give that a try tonight....
I own that model. When removing the rear panel, there are 4 wires you need to pull. If it's less than 4, you have a problem.
When there's a stereo problem on any boombox, it's usually because the stereo pilot adjuster is out of adjustment, probably because the radio was knocked around during shipping. It's usually marked VR01 or 19KHZ on the tuner circuit board, while VR02 is usually the stereo separation pot (which I rarely ever touch). Adjust VR01 until the stereo light comes on. Simple.
It does have 4 wires in total, 3 Power + 1 Antenna.
Adjustments available are
- RT302 FM Multplex adjustment - it should read 19khz +/- 100Hz according to the service manual.
- RT301 Stereo Separation
I've tried turning both through their full range of movement but the stereo light never comes on. (I reset to original position afterwards).
I don't have a frequency counter, but ordered a cheap one from EBay, so will try and check RT302 when it arrives.
Once again, thanks for the helpful replies.