TABLE 3-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (CONTD)
Test or Inspection
Step 8. Bad data transfer between CPU and console.
Refer to Malfunction No. 87.
LOAD READING INCORRECT
Step 1. Measure boom length and check with reading on display. If OK go to Step 2.
Step 2. Measure boom radius and check with console display. If OK go to Step 3.
Step 3. Unplug transducer cables (rod and piston) from transducers and check voltages on CPU terminal board at
terminal block X1. (Refer to page 3-80.) Readings should be:
Between Pin 14 and Pin 15 = -5 Vdc
Between Pin 14 and Pin 13 = +5 Vdc
Between Pin 19 and Pin 20 = -5 Vdc
Between Pin 19 and Pin 18 = +5 Vdc
If OK go to Step 4.
Step 4. Check voltage at transducer plugs (rod and piston). (Refer to page 3-81.) Readings should be:
If OK go to Step 5.
Faulty wiring between CPU and pressure transducer. Repair as necessary.