Test equipment gamma probe systems

Dilon Navigator 2.0: troubleshooting and error codes

The ServiceForge knowledge base holds 8 documented symptoms for the Dilon Navigator 2.0, with 21 ranked causes, 17 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Display is dark

No visual indication on control unit display, unit appears non-functional.

Ranked causes

1. Power switch is off (common)
2. Power switch is broken (occasional)
3. Battery is completely discharged (common)
4. Fuse is blown or missing (occasional)
5. Damaged PCB in control unit (rare)

First check

Verify power switch position

Test point: Power switch on rear of control unit
Expected: Switch in ON position

2 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No signal with cabled probe radiation

Display shows zero counts when radioactive source present; cabled probe connection not functioning.

Ranked causes

1. No connection between probe, cable, and control unit (common)
2. Isotope control set to incorrect isotope (common)
3. Open circuit in probe cable (occasional)
4. Probe is damaged or detector compromised (occasional)
5. Circuit inside control unit damaged (rare)

First check

Verify cable and connector integrity

Test point: Probe connector, cable entry at control unit
Expected: All connections fully seated, no loose pins or bent connectors

3 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No wireless signal from probe radiation

Display shows zero counts when radioactive source present; no communication between wireless probe and control unit.

Ranked causes

1. No wireless connection between probe and control unit (common)
2. Isotope control set to incorrect isotope (common)
3. Probe LED illuminated but not transmitting (occasional)
4. Circuit inside control unit damaged (rare)

First check

Verify probe battery status

Test point: Probe battery compartment
Expected: Battery present, '+' terminal toward base of probe, battery not depleted

2 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Probe LED does not illuminate

Indicator light on wireless pilot probe does not light up when powered on.

Ranked causes

1. Probe battery is dead or installed incorrectly (common)
2. Battery was not installed (occasional)
3. LED on probe is damaged (rare)

First check

Inspect probe battery compartment

Test point: Battery holder in probe base
Expected: Battery present with '+' terminal facing base, battery not depleted

1 more check with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Incomplete digits in display

Display shows partial or garbled characters; some segments missing or non-functional.

Ranked causes

1. Display or display driver is damaged (rare)

First check

Inspect display for physical damage

Test point: Display surface and connectors
Expected: No visible cracks, discoloration, or loose connectors

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Spurious counts with cabled probe away from source radiation

Display shows erroneous count readings when cabled probe is not adjacent to radiopharmaceutical source.

Ranked causes

1. Radiopharmaceutical residue on probe (common)

First check

Inspect probe for contamination

Test point: Probe surface, cap, and cable entry
Expected: No visible residue or staining on probe or connections

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Spurious counts with wireless probe radiation

Display shows erroneous count readings when probe is not adjacent to radiopharmaceutical source.

Ranked causes

1. Radiopharmaceutical residue on probe (common)

First check

Inspect probe for contamination

Test point: Probe surface and cap
Expected: No visible residue or staining on probe

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Spurious high counts with cabled probe radiation

Display shows very high count readings (e.g., 80,000 counts/second) when probe held in air away from source.

Ranked causes

1. Intermittent short in cable (occasional)

First check

Inspect cable for damage

Test point: Cable jacket, connectors, strain relief
Expected: No visible cuts, kinks, or separated connections

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.