Hi Alex Thanks for your voltage measurements, they have cleared a few things up. Firstly, you have 40v on the collector of 0TR4 and both terminals of the solenoid so you don’t appear to have a power supply issue. Second, 0TR4 has 6v on the base and 0v on the emitter and is not conducting. Hence there is a good chance that 0TR4 is cooked. You measure

Thanks tournedos I continue to learn something every day Regards Geoff

Hi I have compared the thicknesses of the cursor lines on both the BM3000 and BM4000. The green lines in the latter are around 0.7mm compared to 0.5mm orange lines in the former. I tried to photo the comparison but it is hard to do. Anyway, it seems that the wider cursor glass was accompanied by a thicker line. Regards Geoff

Hi Alex I have never worked on the BG4000 but recently overhauled the BG6000 which does appear to be fairly similar in many respects. I am not sure whether you have access to the service manual but I presume so because of your knowledge of the relevant transistors. 0TR4 provides the main switching capability for the solenoid. When the BG6000 is in the

Hi Paul Old eyes can be funny things and mine are no exception. However, in my experience, the lines on the BM3000 have always appeared to be more orange than red. Others may disagree. Anyway, in my case, I still have a full pen of orange permanent marker to use up!!! Pleased to hear that you have found a suitable solution to your problem. Regards Geoff

Hi The choice of masking material is very important because you can get a lot of creep underneath depending on the liquid that you are using for marking. Your enamel paint job looks good to me. I just had to try the effect of scoring the plastic and it worked pretty well for me. I scribed a line with three strokes of a sharp Stanley knife and then painted

I agree that making your own plastic cursors can be quite involved because of the problems that have been listed above. My solutions to some of the issues that have been mentioned has been as follows: The original cursor does have a “wedged” profile which I refer to as the ridges along the edges. If you simply fit the flat piece of plastic

Hi everyone I have had several problems with the cursors on these machines and due to the shortage of good spare parts, have resorted to making many of the plastic parts myself. The photo below shows one of my "works in progress" and you can see the hand crafted tuning cursor doesn't look too bad. My only problem at the moment is getting

Hi Leslie You don't seem to be having much luck getting the part that you want. Since you already have one at one side of the LC2 that you can use as a template, have you thought about hand carving something yourself. After all, it is only a simple cable clip that needs to fit into that special shaped opening and it doesn't have to look too

Hi If you look at the part closely, you will probably be able to see that there were originally three plastic prongs (posts) and the two outer ones have broken off. The cord goes through in an "over, under, over" arrangement, locking it firmly in position. I have had some units with broken prongs and an epoxy glue has managed to keep them