Lexmark T620 Service Manual - Page 136

4069-5XX/7XX Printhead Service Check The printhead assembly does not contain any service replaceable parts or components. If service error code 930 displays, the wrong printhead is installed in the printer. Note: A 201 paper jam may also indicate a failing printhead. The paper may have jammed prior to or at the input sensor. Print the error log and see if 201 or 932 errors are logged. Service Error Code 1 Error Code 932 Lost HSYNC 2 Error Code 934 Mirror Motor Lost Lock Error Code 935 Mirror Motor unable to reach operating speed Explanation These errors usually indicate a failure in the HSYNC signal to the printhead. Check the continuity of the cables connected to J7 and J13 on the system board. If incorrect, replace the defective cable. The voltage at J13-4 measures approximately +5 V dc. If incorrect, replace the system board. The voltage at J7-7 measures approximately +24 V dc. If incorrect, replace the system board. If correct, replace the printhead assembly. These error codes indicate a problem with the mirror motor circuit in the printhead assembly or the mirror motor cable to the system board cable or system board assembly. Check the continuity of the mirror motor cable connected to J7 on the system board. If incorrect, replace the cable. The voltage at J7-7 measures approximately +24 V dc. If incorrect, replace the system board. If correct, replace the FRUs in the following order: system board printhead assembly 2-108 Service Manual