Rice Lake 550-10 Installation Guide

The Unofficial DPU-550 HardwareInstallation Guide Version 2.1By R. G. SparberMay 24, 2010Copyleft1 protects this document.Disclaimer: Use these notes

Final Assembly of the DPU-550If you are installing the Lite version of the DPU-550, just skim over the nextfew steps. You only need to install the int

I have completely soldered in one header and am about to do the next one. Solder inall of these headers.An alternative technique is to use a tiny dot

pin connectors, be sure that the pushbutton and USB connector are flat on the circuitboard before soldering all pins.Inspect all solder connections an

Final Modifications to the DRO-350 Circuit Board 1. [ ] Bring back the DRO-350 circuit board.2. [ ] The PIC pin blocks feed in fromthe front side of t

I started by putting down two pads of double sided foam tape. Then I foundsome used rubber washers out of an old faucet (What? Me throw anythingaway!)

Once I was satisfied that they fit right, I removed the top protective covering onthe foam tape and pushed the washers down.7. [ ] Reinstall the DPU o

Final Fit to EnclosureThere are two components on the DPU-550 that must pass through openings inthe enclosure. One is the program pushbutton and the o

2. [ ] place the tape or Avery label as shown.3. [ ] trial fit the DRO plus DPU-550 circuit board assembly on its standoffs.Use the two long 6-32 scr

the pencil lines are aligned with the center of the pushbutton's rod.10. [ ] Remove the two 6-32 screws and then the board assembly.11. [ ] Drill

Here you see the USB connector peaking through the back of the DROenclosure. The probe is pointing to the program pushbutton. You can also seemy separ

Table of ContentsOverview...

18. [ ] Plug the two-pin female connector from the power plug located in step16 into the “in” header. The red and black wires should be as shown above

connector. You should see the red and black wires as shown above. If these wiresare reversed, you may blow up the DRO so be sure to check this twice.

of where the resonator was before you removed it back on page 8. Over on theDPU board, you can find ground at the “out” connector's left pin. Thi

page 26 for a picture of the installed piezo beeper.25. [ ] Carefully reassemble the board assembly on the standoffs using theoriginal short 6-32 scre

Pictures of the Assembled UnitYou can see the DPU-550 buried in there with many wires attached. Page 24 of 27

Note one of the two washers supporting the DPU-550Page 25 of 27

Directly under the keypad is my piezo buzzer which plugs into the Flex 2 socket.This is an end view showing how the inter-board connector is fitted. Y

AcknowledgmentsMy thanks go out to J. Eric "jet" Townsend, Larry Gill, and Jim Fager for theirinsightful suggestions for making this documen

OverviewWhen the DRO-350 is upgraded with the DPU-550, the resulting machine iscalled a DRO-550.The DRO-350 has been a very capable Digital Read Out s

Some assembly might be required but only of through hole connectors. The LiteDPU-550 uses the same circuit board as the full DPU-550 but has fewer fun

Needed Tools and Materials• [ ] temperature controlled soldering iron• [ ] a means of cleaning the solder tip• [ ] thin, rosin core solder• [ ] Solder

• [ ] a pair of small diagonal cutters• [ ] a pair of small needle nose pliers• [ ] a small Phillips head screwdriver to fit the 4 screws on the back

each step can be checked if you like:1. [ ] Remove all cables from the DRO.2. [ ] Using a small Phillips head screwdriver remove the four screws on th

Our task is to carefully remove the PIC which is located on the left edge ofthe circuit board. It is a 28 pin IC with a few components around it that

associated with the resonator. This is where the Solder Wick really pays foritself. Alternately, a solder vacuum can be equally effective. Leave theso