Troubleshooting / Service 
Troubleshooting Procedures 
214  DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual  Release L  
    February 2017 
Table 9-7 Procedure #2—Troubleshooting pen trace failure symptoms 
 
Do not lubricate the plastic gears on the chart and pen motors. 
 
 
How to do it or where to find the data 
Check the sensor for the proper type and 
its ability to function. 
Verify the input configuration data and operation 
of the sensor. 
Recalibrate the recorder. 
Refer to Section 7 - Input Calibration. For 
thermocouple input, be sure to confirm cold-
junction temperature calibration. 
Replace the servo plate assembly. 
Refer to the instructions included with the 
replacement part. 
Call Technical Assistance Center. 
1-800-423-9883  USA and Canada 
 
Table 9-8 Procedure #3—Troubleshooting chart rotation failure symptoms 
 
Do not lubricate the plastic gears on the chart and pen motors. 
 
 
How to do it or where to find the data 
Check the chart installation. 
Be sure the drive pin on the hub is in the drive 
hole on the chart. 
Check the configured chart speed value 
and change it, if required. 
Refer to Section 3 - Configuration. 
Check the motor cable plug connection 
at connector J7 on the main printed 
circuit board. 
Visually examine the plug and reset it. 
Refer to the instructions included with the 
replacement part. 
Call Technical Assistance Center. 
1-800-423-9883  USA and Canada