Ultrasonic generators

Olympus USG-400: troubleshooting and error codes

The ServiceForge knowledge base holds 4 documented symptoms for the Olympus USG-400, with 4 ranked causes, 7 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

Enclosure leakage current exceeds limit high voltage

Leakage current measured at exterior chassis screw exceeds safety threshold

Ranked causes

1. External insulation fault or surface contamination (unknown)

First check

Measure enclosure leakage current

Test point: exterior chassis screw farthest from inlet
Expected: ≤100μA (normal); ≤500μA (single fault); ≤300μA (UL deviation), normal condition
Tools: leakage current tester

Ground leakage current exceeds limit high voltage

Measured leakage current at grounding terminal exceeds safety threshold

Ranked causes

1. Internal insulation breakdown or contamination (unknown)

First check

Measure ground leakage current

Test point: inlet grounding terminal
Expected: ≤500μA (normal); ≤1000μA (single fault), normal condition
Tools: leakage current tester

Grounding resistance out of specification high voltage

Resistance between accessible metal part and grounding terminal exceeds limit during safety inspection

Ranked causes

1. Poor grounding connection or corrosion (unknown)

First check

Measure grounding resistance

Test point: inlet grounding terminal to exterior chassis screw
Expected: 0.1Ω or less
Tools: resistance meter

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

Patient leakage current exceeds limit patient safety

Leakage current from transducer to patient exceeds safety threshold during SONICBEAT operation

Ranked causes

1. Transducer or transducer cable insulation fault (unknown)

First check

Connect leakage current measuring jig

Test point: leakage current measuring jig connector
Expected: jig securely connected to USG-400

3 more checks with pass and fail actions 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.