Lexmark X644E Service Manual - Page 208

7002-xxx Signature button assembly service check Note: If you are unable to clear a 32.xx-Unsupported Cartridge User Error message, be sure a Lexmark T64x print cartridge is correctly installed in the printer. The cartridge is easily identified by the contact board on the right side rear of the cartridge. Install another print cartridge before attempting to troubleshoot the printer. Make sure the signature button cable is properly connected to J14 on the system board. Check the print cartridge for damage or improper installation of the chip. Also, be sure there is proper contact between the chip on the cartridge and the signature button contact assembly. Service tip: An intermittent 32.xx-Unsupported Cartridge User Error message can be caused by poor contact between the signature button cartridge contacts in the upper front cover and the chip. Also check for proper seating of the signature button cartridge cable to the system board. FRU 1 Signature button contact assembly System board Action Check the voltage on the signature button cartridge contact. The voltage measures approximately +3.8 V dc when not writing data to the system board. If data is being written, the voltage measures approximately 0 V dc. If incorrect, disconnect the cable from J19 on the system board, and check the voltage on J19-1. The voltage measures approximately +5 V dc. • If incorrect, replace the system board. • If correct, replace the signature button cartridge contact assembly. System board service check Warning: When replacing any one of the following components: • Flatbed interconnect card (ICC) • System board assembly • Interface card assembly Only replace one component at a time. Replace the required component, and perform a POR before replacing a second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never replace two or more of the components listed above without a POR after installing each one, or the printer will be rendered inoperable. Warning: Never install and remove components listed above as a method of troubleshooting components. Once a component has been installed in a printer, it cannot be used in another printer. It must be returned to the manufacturer. 2-170 Service Manual