NCR 7156, Руководство по обслуживанию

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Contents 7156 Owner’s Guide
September 1998 viii
Verifying Read of MICR Characters .............................................................................. 34
Running the Data Scope Mode....................................................................................... 35
Testing the Slip and Receipt Stations............................................................................. 36
Level 2 Diagnostics.................................................................................................................. 39
Level 3 Diagnostics.................................................................................................................. 39
Print Test .................................................................................................................................. 39
Running the Print Test by Power Cycling the Printer................................................. 40
Running the Print Test by Opening and Closing the Cover....................................... 40
Sample Print Test for RS-232C Models.......................................................................... 41
Sample Print Test for LCSIO (RS-485) Models............................................................. 42
Chapter 4: Troubleshooting 43
Test Points .................................................................................................................... ............ 43
Field Effect Transistors (FETs)............................................................................................... 44
Common PC Board (Newer Printer Models) ............................................................... 44
RS-232C PC Board (Older Models) ................................................................................ 45
LCSIO (RS-485) PC Board (Older Models) ................................................................... 46
Mechanical Problems .............................................................................................................. 47
Printing Problems.................................................................................................................... 49
Forms Feeding Problems........................................................................................................ 50
Electronic Problems ................................................................................................................ 51
Chapter 5: Adjustments 53
Adjusting the Paper Low Sensor........................................................................................... 53
Adjusting the Platen Gap ....................................................................................................... 55
Section Two: Thermal Receipt Mechanism 57
Chapter 6: Removing the Thermal Receipt Mechanism 59
Tools.......................................................................................................................... ................ 59
Removing the Receipt Cover ................................................................................................. 60
Disassembling and Reassembling the Receipt Cover ......................................................... 62
Removing the Platen (Non-Knife Models).................................................................... 62
Replacing the Platen (Non-Knife Models) .................................................................... 62
Removing the Top Cover ....................................................................................................... 63
Disconnecting Cables from the Common PC Board........................................................... 64
Disconnecting Cables from the Older RS-232C PC Board ................................................. 66
Disconnecting Cables from the Older LCSIO (RS-485) PC Board..................................... 68
Removing the Thermal Receipt Mechanism........................................................................ 70