TM 10-3930-675-24-1
TROUBLESHOOTING INTRODUCTION - CONTINUED
0004 00
PRELIMINARY TROUBLESHOOTING PROCEDURES - CONTINUED
b.
Check for mechanical jamming or binding caused by rocks or other foreign matter.
c.
Check fluid levels in subject area and service as required (TM 10-3930-675-10 or WP 0050 00 in this manual).
2.
Ensure all applicable Operator Troubleshooting has been performed before proceeding.
EXPLANATION OF TROUBLESHOOTING TABLE COLUMNS
The columns in troubleshooting tables are defined as follows:
1.
MALFUNCTION. Indicates fault that has occurred in system/equipment.
2.
TEST OR INSPECTION. Indicates test or inspection to be performed to isolate probable cause for fault symptom.
3.
CORRECTIVE ACTION. Indicates procedure to correct the problem.
GENERAL ELECTRICAL INFORMATION - ERROR CODE AND NON-ERROR CODE TROUBLESHOOTING
NOTE
Refer to Electrical General Maintenance Instructions (WP 0113 00) for instructions on using a multim-
eter to check for continuity or shorts and to perform voltage checks.
1.
Analyze the symptoms and conditions and use common sense and logic to determine the most likely cause for the prob-
lem, then troubleshoot that circuit first. The more information you have concerning the problem, the easier it will be to
troubleshoot.
2.
Isolate to the subsystem level (in cases where more than one subsystem is involved); next isolate the problem to a single
circuit within the subsystem; then, isolate the problem to the faulty component using the Troubleshooting Symptom
3.
Frayed, broken, loose, or corroded wiring is a common source of problems in any electrical circuit. Always make visual
inspection before starting detailed troubleshooting. Observe in particular contacts to ground. Components with case
grounds are especially troublesome.
CAUTION
DO NOT use test lights or non-digital multimeters to troubleshoot the RTCH. Only digital multi-
meters may be used. Failure to follow this caution may damage electronic components.
When making continuity checks, make sure test equipment is isolated from power source.
4.
Most of the checks are made by voltage checks. Pay particular attention to the voltages being checked in the procedures.
This equipment has a combination of 12V and 24V systems. Instructions prior to the step instruct to disconnect at test
point from the potential malfunctioning component. Once the check has been made, either repair the component or go to
the referenced step. If going to another step, reconnect connection or do as otherwise instructed, such as install and use
jumper wires. When ready to make the prescribed check, apply power to the circuit (if required). A helper may be
required if the switch or power source is out of reach. Release the power function prior to going on, to avoid damage to
equipment.
NON-ERROR CODE TROUBLESHOOTING
Even though the RTCH has on-board diagnostics, not all malfunctions will produce error codes. Use non-error code
troubleshooting when no error code is generated, yet the RTCH is not functioning properly. When troubleshooting a non-error
code type malfunction:
Perform Preliminary Troubleshooting Procedures. If this doesn't solve the problem, go to step 2.
1.
2.
Locate the symptom or symptoms in WP 0006 00 that best describe the malfunction.
0004 00-2
