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SJ30AJE, SJ30ARJE 196274AF
Electrical System Section 4 – Troubleshooting Information
4.2-23 No Boom Down from Platform Control Console
1. Loose or broken wire #04 from platform terminal
block to joystick controller A2.
Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal
block to joystick controller A2.
Check continuity. Replace if defective.
3. No output on y-axis of joystick controller A2. Refer to joystick test procedure in section 5.
4. Loose or broken wire “Y” from joystick controller
A2 to valve driver pin #29.
Check continuity. Replace if defective.
5. No output on pin #12 of the valve driver to wire
#70.
Check pin #12 for proportional voltage. If no
voltage present with foot on footswitch check
section 5 for OCM pin voltage reference.
6. No output on pin #8 of the valve driver to wire
#13.
Check pin #8 for minimum 5.5 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
7. Loose or broken wire #13 from valve driver pin
#8 to plug A pin #6 in platform control console.
Check continuity. Replace if defective.
8. Loose or broken wire #13 in boom cable A or its
connectors.
Check for continuity between pins #6 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
9. Loose or broken wire #13 from base connector
plug A pin #6 to base terminal block.
Check continuity. Replace if defective.
10. Loose or broken wire #13 from base terminal
block to main manifold harness.
Check continuity. Replace if defective.
11. Loose or broken wire #13 from main manifold
harness to boom down valve 4H-13.
Check continuity. Replace if defective.
12. Loose or broken wire #02 from main manifold
harness to boom down valve 4H-13.
Check continuity. Replace if defective.
13. Defective boom down valve coil 4H-13. Check continuity and resistance through coil.
Replace if defective.
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