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Electrical System
No Riser Down from Base Console:
1. Loose or broken wire #10C from resistor R1 to
resistor R3.
2. Defective resistor R3.
3. Loose or broken wire #10E from resistor R3 to
riser switch S25.
4. Defective riser switch S25.
5. Loose or broken wire #30 from riser switch S25
to base terminal block.
6. Loose or broken wire #30 from base terminal
block to turret harness plug pin #7.
7. Loose or broken wire #30 from turret harness
plug pin #7 to riser down valve 4H-30.
8. Loose or broken wire #02 from turret harness
plug to riser down valve 4H-30.
9. Defective riser down coil 4H-30.
No Riser Down from Platform Console:
1. Loose or broken wire #04 from platform terminal
block to joystick controller A3.
2. Loose or broken wire #02 from platform terminal
block to joystick controller A3.
3. No output on R-Signal joystick controller A3.
4. Loose or broken R-signal wire from joystick
controller to J3 pin #19 valve driver.
5. No output on J3 pin #24 of the valve driver to
wire #20B.
6. No output on J2 pin #3 of the valve driver to wire
#30.
7. Loose or broken wire #30 from valve driver J2
pin #3 to plug A pin #12 in platform control
console.
8. Loose or broken wire #30 in boom cable A or its
connectors.
9. Loose or broken wire #30 from base connector
plug A pin #12 to base terminal block.
SJ85 AJ
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check resistor, replace if defective.
Check continuity. Replace if defective.
Check continuity through switch while activating
up function between wires #10E and #30. Replace
switch if no continuity.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Refer to joystick test procedure in section 5.
Check continuity. Replace if defective.
Check for 12 volts. If no voltage present with foot
on footswitch check section 5 for OCM pin voltage
reference.
Check for a minimum 3.5 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
Check continuity. Replace if defective.
Check for continuity between pins #12 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
229044ADA
109
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