UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Sharp PC-1500 not working

TonyDuell · 28th Nov 2020, 6:08 pm

As Slothie said, the Tandy/ Radio Shack PC2 is a close clone but with a diffferent keyboard layout. The circuitry is much the same and the service manual for that is on the web.

I have the offiical Sharp technical reference manual on my bookshelf but that's more about machine code programming and interfacing than repairing the machine. I will look to see if there's anything of interest though.

The 2 large ICs on the lower PCB are the processor (LH5801) and I/O (LH5810 or LH5811). Also in there are RAM (if this is a plain PC1500, it's CMOS 2114-a-like things I think), a system ROM, etc.

I have had the I/O controllers fail, but the machine would normally still power up. Just an electrical row or column of the keyboard would be dead.

28th Nov 2020, 6:08 pm	#3
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: Sharp PC-1500 not working As Slothie said, the Tandy/ Radio Shack PC2 is a close clone but with a diffferent keyboard layout. The circuitry is much the same and the service manual for that is on the web. I have the offiical Sharp technical reference manual on my bookshelf but that's more about machine code programming and interfacing than repairing the machine. I will look to see if there's anything of interest though. The 2 large ICs on the lower PCB are the processor (LH5801) and I/O (LH5810 or LH5811). Also in there are RAM (if this is a plain PC1500, it's CMOS 2114-a-like things I think), a system ROM, etc. I have had the I/O controllers fail, but the machine would normally still power up. Just an electrical row or column of the keyboard would be dead.