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7193 Service Guide Chapter 5: Disassembling and Reassembling the Printer

August 1998 45

Disconnecting Cables

See the illustration on the facing page for the locations of the connectors on the PC board.

Remove the following cables by gently tugging on the connector.

•

J1, sensor connector

•

J2, motor connector for knife motor (on knife unit)

•

J3, paper feed motor connector

•

J4, cash drawer connector

•

J7, 4-pin connector for printhead ground

Remove the 30-pin ZIF connector (J8) for the printhead.

Carefully pry up the outer shell of the ZIF connector with a screwdriver.

Remove the flat flex cable from the connector, leaving the inner white connector

attached to the PC board.

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NCR 7193 Thermal Receipt 1
Contents 3
Contents 7193 Service Guide 6
August 1998x 6
Communication Interfaces 7
Features 8
Cleaning the Printer 9
August 19984 10
What Is in the Box? 11
Choosing a Location 12
Setting Switches 12
RS-232C Switch Settings 14
Parallel Switch Settings 15
Connecting Cash Drawer Cables 17
Parallel Models 19
Turning On the Printer 20
Testing the Printer 21
August 199816 22
August 199818 24
August 199820 26
Chapter 3: Diagnostics 27
Level 1 Diagnostics 28
Setting Printhead Resistance 30
Setting Partial Cut Distance 32
Running the Data Scope Mode 34
Exit the Data Scope Mode 35
Testing Receipt Printing 36
Level 2 Diagnostics 37
Level 3 Diagnostics 37
August 199832 38
Chapter 4: Troubleshooting 39
Operating Problems 41
Knife Does Not Operate 42
Thermal Printhead 42
Over/Under Temperature 42
Electronic Problems 43
Printing Problems 43
August 199838 44
Getting Started 45
Removing the Receipt Cover 46
Removing the L Cover 47
Disconnecting Cables 51
Removing the Knife Assembly 52
Replacing the Knife Assembly 53
Removing the Printhead 54
Replacing the Printhead 55
Removing the Knife Motor 55
Replacing the Knife Motor 56
Removing the Switches 56
Replacing the Switches 57
Removing the Paper Feed Motor 57
Removing the ESD/EMC Shield 58
Replacing the ESD/EMC Shield 58
Replacing the Print Mechanism 59
Finishing Up 60
Appendix A: Specifications 61
Power Requirements 62
Dimensions and Weight 62
Printing Specifications 63
Ambient Temperature 64
Amount of Solid Coverage 64
Ordering Thermal Paper 65
Ordering Other Supplies 65
August 199860 66
Appendix C: Kits 67
Appendix D: Connectors 69
August 199864 70
Parallel Connector 71
LCSIO (RS-485) Connectors 71
Cash Drawer Connectors 72
Appendix E: Commands 73
Printer Function Commands 74
Hex Code Command 75
Graphics Commands 76
Printer Status Commands 76
Real Time Commands 76
Bar Code Commands 77
August 199872 78
Printed in U.S.A 84

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