It turned out to be an easy fix
The SINO SDS2MS is a relatively old DRO control and display box. The owner of the unit brought it to me for a ‘look at’ after it had suddenly died after many years of faithful service. The internals consisted of a power supply and a PCB motherboard. The feed from the power supply was a two wire connection and the PCB clearly stated this was 5V. I isolated the connection and measured the power supply in isolation which revealed the power supply was only delivering 3V. Feeding the motherboard direct from a bench power supply at 5V brought the unit back to life. Current drawn was around 1 Amp.
I had in stock a MakerHut 5V/2A power supply that would physically swap out for the original power supply. I have used a lot of the MakerHut PSUs and found them to be very reliable. So problem solved, unit back up and running.
Reading around about the SINO units, it seems the power supply is the most common mode of failure. Comparing the size of the old PSU and the replacement unit gives an indication of how technology has changed.
Links to similar or related post are listed below : –
- SINO SDS2MS DRO repair
- A useful Amazon sourced small item storage system
- 3D Printed Threads Modelled in Fusion 360
- Three axis stepper controller PCB in stock
- Myford Super 7 Large Bore depth stop
- Tangential Lathe Toolholder for Myford Super 7
- Hemmingway Sensitive Knurling Tool
- Workshop air compressor problems
- Replacement Cowells Chuck Key (Part 2)
- Illuminated Optical Centre Punch
