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Digi Canada Inc. - 87 Moyal Court, Concord, Ontario L4K 4R8
Toll Free - 1.888.587.8221, E-mail - sales@digicanada.ca, www.digicanada.ca
DS - 788
SERVICE MANUAL
6thEDITION - MARCH 2004
Digi DS-788 service ManualDigi DS-788 service ManualDigi DS-788 service ManualDigi DS-788 service Manual
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DS-788 Service Manual --- CONTENTS
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CONTENTS
1. General Specification -----------------------------------------------------------------------------
1.1. General Layout 1
1.1.1. Bench Type 1
1.1.2. Pole Type 2
1.2. Purpose 3
1.3. Features 3
1.4. Operation Conditions 3
1.5. Charging Conditions 3
1.6. Analog Specification 4
1.7. Capacity / Minimum Graduation / Tare Range 4
1.7.1. Single Interval 4
1.7.2. Multi-Interval 4
1.8. Display and Indicators 4
1.8.1. Display Specification 4
1.8.2. Indicators 4
1.9. Dimensions 5
1.10. External Connectors 5
1.11. Main Components 5
1.12. Existing Parts To Be Used 5
1.13. Key Sheet Layout 5
1.14. Key Function 6
1.14.1. Type A (Standard Export Version) 6
1.14.2. Type B (Preset Key Export Version) 6
1.15. Notable Difference from Current Teraoka Scale 6
2. Maintenance Mode --------------------------------------------------------------------------------
2.1. Location of Span Switch 7
2.2. SPAN Adjustment 7
2.3. Escape From Calibration Mode 7
2.4. Specification Setting 8
2.4.1. Specification Enter (141) 8
2.4.2. Specification Enter (142) 8
2.5. Internal Count & A/D Count Display 9
2.6. Tax Setting 9
2.7. Operational Specification List 9
2.7.1. For the Customer – (141) 9
2.7.2. For Weight & Measure – (142) 10
3. Main Operation ------------------------------------------------------------------------------------
3.1. ON/OFF 12
3.2. Tare Subtraction 12
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DS-788 Service Manual --- CONTENTS
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3.3. Plural Operation 12
3.3.1. Standard Version 12
3.3.2. Japan Type A Version 13
3.3.3. Japan Type B Version 13
3.4. AMT/TEND Key Operation 13
3.4.1. Method A (Direct Entry Method) 13
3.4.2. Method B (Indirect Entry Method) 14
3.5.
Price Base Change By 100g/kg Key 14
3.6. Auto Zero Operation 14
3.7. kg and lb conversion by UNIT Key 15
3.8. kg, decimal lb and kati conversion by UNIT Key 15
3.9. Currency Conversion by EURO Key 15
3.9.1. Currency Conversion Operation Method 1 15
3.9.2. Currency Conversion Operation Method 2 16
3.10. Operations of Mode Set Key 16
3.10.1. Preset Key Setting 16
3.10.2. Conversion Rate Setting 16
3.10.3. Invert Currency Conversion Function 17
3.10.4. Cancel Currency Conversion Function 17
4. Error Message --------------------------------------------------------------------------------------- 18
5. Hardware Detail -------------------------------------------------------------------------------------
5.1. Microcomputer 19
5.2. Pin Assignment 19
5.3. Block Diagram of Electrical Connection 21
5.4. Physical Layout of Electrical Connection 21
6. RS-232C Interface (Normal) ---------------------------------------------------------------------
6.1. Specification 22
6.2. Pin Connection 22
6.3. Control Code And Characters 22
6.4. Data Format 23
6.5. Communication Method 24
6.5.1. Stream (Continuously Output) 25
6.5.2. Manual 25
6.5.3. Command 26
7. RS-232C Additional Protocol for ECR (Version 1.30 or Above) --------------------
7.1. Control Code and Characters 27
7.2. Communication With ECR 27
7.2.1. QUQA TRADING 27
7.2.2. IBM, HUGIN Interface 29
7.2.3. ICL Interface 30
7.2.4. CAS Interface 34
7.2.5. NIXDORF Interface 37
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DS-788 Service Manual --- CONTENTS
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7.2.6. NCR Interface 39
7.2.7. MONS Interface 40
7.2.8. WTN Interface 41
7.2.9. ELITE Interface 42
7.2.10. GAOTENG Interface 43
7.2.11. SHARP TK300 Interface 45
7.2.12. UKRAINE Interface 47
8. Circuitry Diagram -----------------------------------------------------------------------------------
8.1. Power Block 48
8.2. Keyboard Block 49
8.3. CPU Block 50
8.4. LED Block 51
8.5. A/D Block 52
8.6. Display Block 53
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