CAS ED Series, Service Manual

Page: 2 / 29

ED
Service Manual
2 04/12/10
< Table of Contents >
1. Introduction
............................................................................................................................... 4
1.1. Preface
.................................................................................................................................... 4
1.2. Precaution
............................................................................................................................. 4
1.3. Specification
........................................................................................................................ 5
1.4. Sealing Method
................................................................................................................... 7
2. Calibration
................................................................................................................................... 9
2.1. General Calibration
.......................................................................................................... 9
2.1.1. C4 Setting
........................................................................................................... 10
2.1.1.1. C4-1 Setting ................................................................. 10
2.1.1.2. C4-2 Setting ................................................................. 10
2.1.1.3. C4-3 Setting ................................................................. 10
2.1.1.4. C4-4 Setting ................................................................. 11
2.1.1.5. C4-5 Setting ................................................................. 11
2.1.2. SPAN Calibration Setting (C-3)
.............................................................. 12
2.1.3. Gravity Constant Value Setting (C-9)
................................................ 12
2.1.4. Calibration factor Setting (C-10)
.......................................................... 13
2.1.5. Displaying Real A/D Value (C-5)
.......................................................... 13
2.1.6. Percent Calibration (C-7)
.......................................................................... 14
2.1.7. Battery Calibration (C-8)
........................................................................... 14
3. The Schematics and Diagram
......................................................................................... 15
3.1. System Block Diagram
................................................................................................. 15
3.2. Circuit Diagram
................................................................................................................ 16
3.2.1. MAIN
...................................................................................................................... 16
3.2.2. DISPLAY & MODULE ................................................................................................. 17
4. Exploded View
......................................................................................................................... 18
5. Load Cell drawing
.................................................................................................................. 19
6. Part Location
............................................................................................................................ 20
Main PCB Part Location ................................................................. 20
COMMON PCB.
.......................................................................................................................... 22
RS-232 MODULE PCB Part Location ............................................... 22
RS-232 PCB (TOP)
................................................................................................................. 22
RS-232 PCB (BOTTOM)
....................................................................................................... 22
KEY PCB Part Location .................................................................. 23
KEY PCB ......................................................................................................................................... 23
7. Error Messages & Solution
............................................................................................... 24