DIAGNOSTIC CHART

(CLICK HERE FOR SELF-TEST FEATURES)

SYMPTOM

Unit does not power up

1) Check fuses; replace if defective.

2) Use Local On /Off switch on power supply PCB to attempt to power up unit; If depressing this switch turns unit on, replace the key/display PCB; If not, replace the power supply PCB.

LCD functions; Chart does not

1) If the chart moves (but does not print) replace the printhead.
2) No chart movement Check to insure paper is covering paper sensor (without wrinkles); If so, and still no movement, go to step 3.
3) If the chart does not move, replace the print/drive PCB, paper sensor PCB, or step motor as applicable

No display or record of depth
(other functions are normal)

1) Check transducer connections and wiring
2) Verify Jumper setting on T/R PCB is set properly for your transducer.
2) Replace T/R PCB.

No GPS data or depth data output

1) Verify proper operation of external devices.
2) Check Jumper on Data I/O is properly set for RS232 or RS422.
3) Connect through a NULL Modem.
4) Connect through a breakout box, verify data transmission
5) Replace Data I/O PCB.