A few months ago I picked up a Casio FZ-1 Digital Sampling Synthesizer in Nagano, Japan for $10. Yeah, it was 1,000 Japanese yen and I couldn’t believe it. I thought there probably would be a ton of things wrong with it, but to my surprise everything worked great, even the belt driven floppy drive. The minor problem ( so I thought ) was that the display needed a new foil for the backlight. I’ve done this many times on other synths and it’s really pretty straight forward.
NOT SO with the Casio FZ-1 Sampler!!
Unfortunately, there are these really old etched ribbon cables attached ( soldered/taped ) to both the display and LCD board. Altogether there are six cables and boy do they look detailed and complicated. The problem is that when replacing the foil for the backlight, it’s almost too easy for the cables to lose a connection or two. This causes missing lines and even garbled data on the display. In fact for the better part of a day while trying to fix the problem, I had a really nice shiny LCD, but no text!!
After some research, I ran down to the 100 yen shop and bought some balsa wood, metal clamps for paper, and 0.6K insulation tubing I use when I solder wires together. I then proceeded to clamp down all cables attached to the display and LCD board. I managed to clamp all sides and after removing the metal handles on the clamps, could successfully put the display back into the FZ-1. The LCD board I could not fit back into it’s original position, so I just secured it slightly above it’s normal spot. I then closed the FZ-1 back up and the photo below is my FINAL result. No way am I going to go any further as likely it will either result in more missing lines or too much work!!
Are there any alternative displays out there? Not according to my research just yet. You basically have to find another FZ-1 or just cross your fingers and hope that you don’t crimp, pull, or mess up the ribbon cable when changing the backlight. Had I known I would go through all of this trouble, I probably would not have done the change. If you can see your screen reasonably well in your studio, I don’t recommend putting in a new backlight. However, if you need to perform or play in darker venues, then of course you’ll have to just go for it.
Best of luck with your display repair. Be VERY careful with those ribbon cables. The instructions that came with my Backlit foil didn’t say a word about them.