NCR 7156 Operating And Troubleshooting Manual
Hide thumbs
Also See for 7156:
- Setup and user manual (38 pages) ,
- Owner's manual (138 pages) ,
- Service manual (206 pages)
Related Manuals for NCR 7156
Summary of Contents for NCR 7156
- Page 1 NCR 7156 Multifunction Printer MICR Operation and Trouble-Shooting Guide B005-0000-1057 Issue A...
- Page 2 NCR, therefore, reserves the right to change specifications without prior notice. All features, functions, and operations described herein may not be marketed by NCR in all parts of the world. In some instances, photographs are of equipment prototypes. Therefore, before using this document, consult with your NCR representative or NCR office for information that is applicable and current.
-
Page 3: Where To Get Additional Information
MICR reader. The book is intended as a guide for service representatives, field engineers, and for anyone who will be installing and servicing the 7156 printer. It can also be used as a reference for service training courses. You must be an authorized, trained service representative to service the 7156 printer. - Page 4 MICR Operation and Trouble-Shooting Guide...
-
Page 5: Table Of Contents
MICR Operation and Trouble-Shooting Guide Table of Contents Chapter 1: 7156 MICR Operation MICR Setup and Read Test..........1 Necessary Conditions for MICR Reading ...... 4 Chapter 2: Troubleshooting Incorrect Document Feed..........5 Printer Hookup ............6 Damaged Document ........... 6 Obscured or Faulty Slip-In Sensor ...... - Page 6 MICR Operation and Trouble-Shooting Guide Platen Gap Tightness ..........19 Chapter 3: In-Place MICR Adjustment Setup for In-Place MICR Adjustment ......21 MICR Adjustment............22...
- Page 7 MICR Operation and Trouble-Shooting Guide Revision Record Issue Date Remarks Dec 97 First printing...
-
Page 8: Canadian Department Of Communications
NCR is not responsible for any radio or television interference caused by unauthorized modification of this equipment or the substitution or attachment of connecting cables and equipment other than those specified by NCR. -
Page 9: Chapter 1: 7156 Micr Operation
ASCII format for transaction processing. The 7156 MICR is very stable and can run for the life of the printer without readjustment of the factory settings. However, you may encounter problems due to electromagnetic interference or changes in the printer mechanism. - Page 10 Chapter 1: 7156 MICR Operation Select a MICR encoded bank check or similar document. Make sure that the test document is of high quality and fits the specifications for the printer. 4. Enable MICR reading. MICR reading is normally initiated on command by the host system.
- Page 11 Chapter 1: 7156 MICR Operation END ORSE H ERE RESERVED FOR FINANCIAL INSTITUTION USE MICR Characters Underneath Guide Slip Table Extended Slip Table Check Orientation 5. Turn on the printer power. 6. Insert the MICR document. Place the document on the slip table with the MICR characters face down and to the right.
-
Page 12: Necessary Conditions For Micr Reading
Chapter 1: 7156 MICR Operation • For any MICR document, check for “?” character misreads, and serious misread problems such as “NO MICR CHARACTERS”, substantially garbled translation, or character substitutions. Necessary Conditions for MICR Reading The following section outlines the conditions that affect MICR. Make sure that your printer has been set up and operates within the following guidelines. -
Page 13: Chapter 2: Troubleshooting
This chapter covers only MICR-related problems. For all other issues, see the 7156 Owner’s Guide or the 7156 Service Guide. Harness conversion kit: There is a harness extension kit for dual- board printers if the repair results in the control board replacement with a version that contains an integrated MICR amplifier. -
Page 14: Printer Hookup
Chapter 2: Troubleshooting Check the following to determine the cause of the problem. Printer Hookup Before document feeding is enabled the printer control program checks for the following: • Internal harness connected to their associated headers • All covers closed •... -
Page 15: Insert Micr Document
Chapter 2: Troubleshooting • Reinsert the slip correctly so that the indicator LED turns on. Then pull the slip straight to the left about 1/4 inch. The indicator LED should turn off. (This tests the front LED slip-in sensor.) Top of Printer Back Led Sensor Front Led Sensor (Blow Air or Wipe Clean... -
Page 16: Document Inserted Incorrectly
You should notice a strong tug from the magnet. If the magnet is missing replace the platen. Repeat the MICR read test. For more information on replacing the platen, see the 7156 Service Guide. Incorrect Printer Installation, Electrical Grounding or Bonding, or MICR Adjustment Difficulty in attaining “OK”... -
Page 17: Improper System Ground Bonding
Chapter 2: Troubleshooting printer and the monitor, and an angular orientation of the monitor to the printer. Improper System Ground Bonding The metal structures and the logic and power grounds in the printer must be securely bonded together and electrically connected to the system ground at the host. -
Page 18: Faulty Read Head
Replace the read head assembly and perform the MICR adjustment. Then repeat the MICR read test. For more information on replacing the read head assembly, see the 7156 Service Guide. For more information on adjusting the MICR, see “In-Place MICR... - Page 19 This positioning boss was added to newer read head assemblies. If the locating hole is not present in the cantilever (as was the case for early models of the 7156), cut off and completely remove all remnants of the boss protrusion on the lower-left corner of the replacement read head bracket.
-
Page 20: Degraded Buck Coil Connections
Chapter 2: Troubleshooting Degraded Buck Coil Connections Set the printer for the MICR adjustment and print out a few readings. For more information, see “In-Place MICR Adjustment” on page 20. Work the buck coil connections by reaching in to the harness terminals with needle-nose pliers and working each wire back and forth about an eighth of an inch. - Page 21 Chapter 2: Troubleshooting • Read head and buck coil, leads-to-frame: greater than 10 Meg Ohms. Isolate and repair any connection for which the resistance varies from the values above. Reassemble the printer and perform the MICR adjustment. Then repeat the MICR read test. For more information on adjusting the MICR, see “In-Place MICR Adjustment”...
-
Page 22: Read Head Contact And Movement: Mechanical Problems
Replace the board containing the MICR amplifier. For more information, see the 7156 Service Guide. Reassemble the printer and perform the MICR adjustment. -
Page 23: Faulty Micr Solenoid
MICR adjustment. Then repeat the MICR read test. For more information on replacing the MICR bracket assembly, see the 7156 Service Guide. For more information on adjusting the MICR, see “In-Place MICR Adjustment” on page... -
Page 24: Suppressed Read Head Motion
If the read head does not rise properly, tear down the printer to remove the interference. For more information, see the 7156 Service Guide. Reassemble the printer, then perform the MICR adjustment and repeat the MICR read test. For more information on adjusting the MICR, see “In-Place MICR Adjustment”... -
Page 25: Read Head Tilt
If the pad is missing, damaged, or partially dislodged; remove the carriage and repair the pad or replace the print head carriage. For more information on replacing the print head, see the 7156 Service Guide. Reassemble the printer and perform the MICR adjustment. Then repeat the MICR read test. -
Page 26: Improper Document Motion
To examine the line of contact, remove the cantilever assembly with the read head attached. For more information, see the 7156 Service Guide. Remove the ribbon cassette and move the print head carriage to 1 inch from the right end of carriage travel. -
Page 27: Bumps On Paper Feed Rolls
If the platen gap is too tight, it may create a drag on documents, interfering with a smooth feed. Measure and reset the platen gap. For more information, see the 7156 Service Guide. Perform the MICR adjustment and repeat the MICR read test. For more information on... - Page 28 Chapter 2: Troubleshooting...
- Page 29 Chapter 3: In-Place MICR Adjustment Chapter 3: In-Place MICR Adjustment Use this adjustment to the MICR amplifier to provide the most effective interference suppression given the printer environment during MICR reading. The environment includes any large metal surfaces under or near the printer and the CRT monitor. The CRT monitor creates interference through a series of polarized pulses generated by the deflection coils on the sides of the CRT tube.
- Page 30 Chapter 3: In-Place MICR Adjustment 4. Press the RESET button or press the Online button off and then on again to enable the new DIP switch settings. Caution: Do not move the print head carriage from the position it was moved to by the printer upon reset.
- Page 31 Close the metal frame. • For dual-board printers, remove the printer’s top cover. For more information, see the 7156 Service Guide. • If you accidentally move the print head carriage before or during the adjustment, reset the printer to accurately position the print...
- Page 32 Chapter 3: In-Place MICR Adjustment Top of Printer Paper Paper Feed Button MICR Read Head Potentiometers Front Cover DIP Switch Potentiometer (R8) Potentiometer (R9) Paper Front of Printer Single - Board Printer...
- Page 33 Chapter 3: In-Place MICR Adjustment Top of Printer Paper Paper Feed Button Potentiometers Shallow Pot Deep Pot MICR Read Head Carriage Assembly Feed Roll Assembly Dual - Board Printer 1. Insert a blank sheet of paper in the slip station covering the MICR read head, but behind the paper feed rollers.
- Page 34 Chapter 3: In-Place MICR Adjustment Printout Value Meaning “OK” Optimum setting “ABCDE” or Maximum acceptable interference “ABCDEF” “ABCDEFG” and Interference too high; repeat adjustment greater procedure A variation of plus or minus one character from line to line is normal. Greater variation indicates either a poor connection to the buck coil or a faulty read head.
- Page 36 B005-0000-1057 Dec. 1998 Printed on recycled paper...