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Service Manual
PW-II
PW-II SERVICE MANUAL
1
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Table of Contents
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Summarization of Contents

1. Introduction
1.1. Preface
Thank you note for purchasing the scale and introduction to the manual.
1.2. Precaution
Important safety and operational guidelines for using the scale.
1.3. Specifications
Detailed technical specifications for the PW-II scale models.
1.4. Key
Explanation of the function of each key on the scale's control panel.
1.5. Sealing Method
Description of the method used for sealing the scale unit.
2. Calibration
2.1. General Calibration
Instructions for navigating and performing general calibration modes.
2.1.1. C4 Setting
Detailed settings and configurations related to the C4 calibration parameter.
2.1.2. SPAN Calibration Setting (C-3)
Procedure for performing SPAN calibration using the C-3 mode.
2.1.3. Gravity Constant Value Setting (C-9)
How to set the gravitational constant value using C-9 mode.
2.1.4. Displaying Real A/D Value (C-5)
How to display the real Analog-to-Digital (A/D) value using C-5 mode.
2.1.5. Confirm SPAN Calibrated A/D Value (C-1)
Procedure to confirm the SPAN calibrated A/D value in C-1 mode.
2.1.6. Return to Normal Weighing Mode (C-0)
Steps to exit calibration and return to normal weighing mode.
2.1.7. Calibration Block Diagram
Visual representation of the calibration process flow.
3. The Schematics and Diagram
3.1. System Block Diagram
Overview of the scale's electronic components and their interconnections.
3.2. Circuit Diagrams
Detailed schematics showing circuit layouts and component connections.
5. Part Location
5.1. Main PCB (Front)
Diagram showing the component layout on the front of the main PCB.
5.2. Main PCB (Rear)
Diagram showing the component layout on the rear of the main PCB.
5.3. Battery PCB
Diagram showing the component layout of the battery PCB.
5.4. Key PCB
Diagram showing the component layout of the key PCB.
6. Part List
6.1. Circuit Part List
List of electronic components for circuit boards.
6.2. Mechanism Part List
List of mechanical components used in the scale assembly.
7. Error Messages & Solution
7.1. Beep: Re-zero
Explains the "Re-zero" beep error and its cause.
7.2. Err: Initial Zero
Explains the "Err" message related to initial zero setting.
7.3. Init: Failure of Analog Module
Explains the "Init" message indicating analog module issues.
7.4. UNSTA: A/D Value Unstable
Explains the "UNSTA" error for unstable A/D values.

Table of Contents