NCR 7156, Service Manual

Page: 82 / 206

Chapter 6: Removing the Thermal Receipt Mechanism 7156 Service Guide
September 1998 68
Disconnecting Cables from the Older LCSIO (RS-485) PC Board
Use these instructions to disconnect cables from the older LCSIO (RS-485) PC board. This
board is replaced by the common PC board. See “Disconnecting Cables from the Enhanced
Common PC board” earlier in this chapter and “Removing the PC Board” in chapter 9 for
more information.
If the printer has the MICR check reader option with the MICR amplifier board installed,
the MICR amplifier board must also be removed. See “Removing the MICR Amplifier
Board: LCSIO (RS-485) Models” in chapter 9 for more information. Three extender cables
are available in a kit that must be used to connect the following three cables to the
Common PC board:
•
MICR Read Head Cable
•
MICR Buckhead Cable
•
MICR Solenoid Cable
See “Appendix C: Common PC Board” for more information about the extender cables. See
the Parts Information Manual for the kit number.
Caution: Electro Static Discharge may damage the PC board. Wear a grounded wrist strap
and use a static mat or other ESD protected work surface whenever you work with the PC
board.
1. Remove the following cables by gently tugging on the connector:
•
Paper feed motor cable
•
Receipt exhaust switch cable
•
Knife motor cable (knife unit)
•
Printhead ground strap (connected to ZIF connector)
2. Remove the flat, thermal printer cable from the 30-pin ZIF connector.
a. Carefully pry up the outer shell of the ZIF connector with a screwdriver.
b. Remove the flat flex cable from the connector, leaving the inner white connector
attached to the PC board.