Difference between revisions of "ACU-RITE D200 DRO"

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* For 115V operation, jumper Primary #1A to Primary #2A as well as Primary #1B to Primary #2B. This puts the primaries in parallel.
 
* For 115V operation, jumper Primary #1A to Primary #2A as well as Primary #1B to Primary #2B. This puts the primaries in parallel.
 
* For 230V operation, jumper Primary #1B to Primary #2A. This puts the primaries in series.
 
* For 230V operation, jumper Primary #1B to Primary #2A. This puts the primaries in series.
 +
 +
=== 2x Logic Board ===
 +
 +
{| class="wikitable"
 +
! Name
 +
! Markings
 +
|-
 +
| U1
 +
| [https://www.allegromicro.com/~/media/Files/Datasheets/UCN5818-Datasheet.ashx Allegro UCN5818EPF]
 +
|-
 +
| U2
 +
| [https://www.mouser.com/ds/2/149/74VHC138-104558.pdf Fairchild 74VHC138]
 +
|-
 +
| U3
 +
| [https://en.wikichip.org/wiki/amd/am186ex/am186es%E2%80%9320kc%5Cw AMD Am188 EM-20KC]
 +
|-
 +
| U4
 +
| [http://ww1.microchip.com/downloads/en/DeviceDoc/20067K.pdf Microchip 93AA66/SN]
 +
|-
 +
| U5
 +
| [https://pdf1.alldatasheet.com/datasheet-pdf/view/50688/FAIRCHILD/74VHCT573/+_0589UwYhRDpKxHeDCdPL+hIh+/datasheet.pdf Fairchild 74VHCT573]
 +
|-
 +
| U6
 +
| [https://media.digikey.com/pdf/Data%20Sheets/ISSI%20PDFs/IS62C256.pdf ISSI IS62C256-70U]
 +
|-
 +
| U7
 +
| [http://pdf.datasheetcatalog.com/datasheet/nationalsemiconductor/DS011505.PDF National Semiconductor 74VHCT74]
 +
|-
 +
| U8
 +
| AMI 9851NTF ACU-RITE 387577-702 REV-B
 +
|-
 +
| U9, U10
 +
| [https://pdf1.alldatasheet.com/datasheet-pdf/view/12306/MOTOROLA/MC74VHC574DT/+02_QJUILSxSPME+SpEw+RMhIHSi+/datasheet.pdf Motorola VHC574]
 +
|-
 +
| U11
 +
| unknown, sticker reads "DRO 1.1.2" (ROM?)
 +
|-
 +
| U12
 +
| [http://www.mouser.com/ds/2/149/74VHC123A-15491.pdf Fairchild 74VHC123A]
 +
|}
 +
 +
=== VFDs ===
 +
 +
==== Top ====
 +
 +
Noritake CH1573G
 +
 +
8-digit 14-segment display with periods. The last (right-most) segment has a dot in the center of the top "circle" in the 8. There are also words above each digit to indicate modes.
 +
 +
==== Bottom ====
 +
 +
Noritake CH1572G
 +
 +
8-digit 7-segment display with periods and split center segments. The last (right-most) segment has a dot in the center of the top "circle" in the 8.
  
 
== Online Resources ==
 
== Online Resources ==

Latest revision as of 06:53, 15 June 2019

ACU-RITE 2x Mill D200

Overview

Glass scale based digital read out (DRO). It uses a vacuum fluorescent display (VFD) rather than a more modern LED displays.

2X MILL D200  DOM
PN: 2001003
SN: 99050879 Rev: B

Photos

Taken from eBay seller lovedabeach's eBay Item #122087858728.

Replacement Parts

Power Entry Module

DigiKey Part CCM1372-ND.jpg TE Connectivity Corcom Filters PS0SXS000

Transformer

ENSIGN CORPORATION
2001-900 B
172.9911

172 is the manufacturer code (Acu-Rite or Ensign?) 9911 is the date code, November 1999. B is the revision level.

Specs:

  • Input Power: 115/230VAC ± 20% @ 50/60Hz
  • Output #1: 7V minimum ripple valley @ 1.4ADC / 47000uF (± 20%) capacitor with 80% nominal input (92VAC instead of 115VAC), 15V ripple peak @ 450mA with 120% (138VAC instead of 115VAC) input.
  • Output #2: 34V minimum @ 115mA DC / 1000uF (± 20%) capacitor with 80% nominal input, no maximum specified.
  • typical forward diode drop is expected to be 1V
  • thermal fuse on each secondary, if it blows it's permanent.
  • external fusing, 0.5A slow blow for 115V operation, 0.25A slow blow for 230V operation.

Transformer pinout:

The bobbin manufacturer and Acu-Rite use different pin mappings. On the bobbin, pin #1 is marked by a notch in the plastic, that pin is also closer to it's adjacent pin than the rest. The bobbin pin numbers are numbered 1-6 then 7-12 clockwise (TODO: from above or below?). In other words, bobbin pins 6 and 7 are across from each other at the same end of the transformer.

Bobbin Pin Acu-Rite Pin Function
1 [NC] [NC]
2 1 Primary #1 A
3 2 Primary #1 B
4 3 Primary #2 A
5 4 Primary #2 B
6 [NC] [NC]
7 5 >34V out
8 6 >34V out
9 [NC] [NC]
10 [NC] [NC]
11 7 7-15V out
12 8 7-15V out
  • For 115V operation, jumper Primary #1A to Primary #2A as well as Primary #1B to Primary #2B. This puts the primaries in parallel.
  • For 230V operation, jumper Primary #1B to Primary #2A. This puts the primaries in series.

2x Logic Board

Name Markings
U1 Allegro UCN5818EPF
U2 Fairchild 74VHC138
U3 AMD Am188 EM-20KC
U4 Microchip 93AA66/SN
U5 Fairchild 74VHCT573
U6 ISSI IS62C256-70U
U7 National Semiconductor 74VHCT74
U8 AMI 9851NTF ACU-RITE 387577-702 REV-B
U9, U10 Motorola VHC574
U11 unknown, sticker reads "DRO 1.1.2" (ROM?)
U12 Fairchild 74VHC123A

VFDs

Top

Noritake CH1573G

8-digit 14-segment display with periods. The last (right-most) segment has a dot in the center of the top "circle" in the 8. There are also words above each digit to indicate modes.

Bottom

Noritake CH1572G

8-digit 7-segment display with periods and split center segments. The last (right-most) segment has a dot in the center of the top "circle" in the 8.

Online Resources

Acu-Rite DRO 200M Brochure

Acu-Rite DRO 200M Reference Manual

Manuals & Flyers – ACU-RITE

Technical Support – ACU-RITE

Service: Helpline - HEIDENHAIN

ACU-RITE DRO 200M | Digital Readout Systems

Acu-rite Digital Readout Repair Page