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Section 4 – Troubleshooting Information
4.2-7 No Telescope
No Telescope In from Base Console:
1. Loose or broken wire #10C from resistor R1 to
boom switch S14.
2. Defective telescope switch S14.
3. Loose or broken wire #38 from telescope switch
S14 to base terminal block.
4. Loose or broken wire #38 from base terminal
block to turret harness plug pin #13.
5. Loose or broken wire #38 from turret harness
plug pin #13 to telescope in valve 4H-38.
6. Loose or broken wire #02 from turret harness
plug to telescope in valve 4H-38.
7. Defective telescope in coil 4H-38.
No Telescope In from Platform Console:
1. Loose or broken wire #04 from platform terminal
block to telescope switch S18.
2. Defective telescope switch S18.
3. Loose or broken wire 38A from S18 to J2 pin #21
of valve driver.
4. No output on J2 pin #24 of the valve driver to
wire #20B.
5. No output on J2 pin #9 of the valve driver to wire
#38.
6. Loose or broken wire #38 from valve driver
J2 pin #9 to plug B pin #8 in platform control
console.
7. Loose or broken wire #38 in boom cable B or its
connectors.
8. Loose or broken wire #38 from base connector
plug B pin #8 to base terminal block.
229044ADA
112
Check continuity. Replace if defective.
Check continuity through switch while activating
up function between wires #10C and #38. 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 through switch while activating
function between wires #4 and #38A. Replace
switch if no continuity.
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 #8 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
Electrical System
SJ85 AJ
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