Honeywell DR4300 manual Troubleshooting the Keypad and Display

DR4300 Circular Chart Recorder

8.5.5 Troubleshooting Erratic Pen Movement

Procedure

Table 8-9explains what to do if the pen remains at the high end of range when the input signal is low.

Table 8-9 Troubleshooting Erratic Pen Movement Symptoms

Step	What to do	How to do it or
		where to find the instructions
1	Check the sensor and lead wires for	Replace the sensor lead wires as needed.
	continuity. Check the connections to TB2	Tighten the connections.
	on the printed circuit assembly for the pen
	with the problem.
2	Check the pen and input configuration	Refer to Section 4 – Configuration, Startup, and
	data.	Operation of Recorder with Display.
3	Run step test.	Refer to Section 4 – Configuration, Startup, and
		Operation of Recorder with Display (Subsection
		4.4.3).
4	Replace the servo plate assembly.	Refer to the replacement procedure in Section 9
		– Replacing Hardware Assemblies.
5	Replace the printed circuit assembly for	Refer to the replacement procedure in Section 9
	the pen having the problem.	– Replacing Hardware Assemblies.

8.5.6 Troubleshooting the Keypad and Display

Procedure

Table 8-10explains what to do if a key does not respond and/or the display does not light.

Table 8-10 Troubleshooting Keypad and/or Display Failure Symptoms

Step	What to do	How to do it or
		where to find the instructions
1	Run a Key Test to check the operation of	Refer to Section 4 – Configuration, Startup, and
	the keys and displays.	Operation of Recorder with Display for procedure
		for running key test (Subsection 4.4.4.4).
2	Verify correct alignment of display cable	Insure tracks on cable are aligned with pins on
	with pins on connector at display module	connector.
	and main PCA.
3	Replace the display and keypad assembly	Refer to the replacement procedure in Section 9
	or display cables, as required.	– Replacing Hardware Assemblies.

184 DR4300 Circular Chart Recorder Product Manual 12/03