Sorensen AST400-4.3 Power Supply Repair and Calibration

$245.00 evaluation fee

🛡️ 90-Day Warranty ✓ Fee Credited to Repair ⚡ No Forms Needed

Authorized Sorensen AST400-4.3 repair, calibration, and restoration services. Common issues include output regulation failure and ripple and noise increase.

Helpful Resources

📋 How It Works

Submit Request – Pay evaluation fee & provide equipment details
Ship to Us – Send your equipment to our Oregon facility
We Evaluate – Detailed diagnosis & repair estimate
Fee Credited – Your evaluation fee applies to repair cost
We Repair – Professional repair with 90-day warranty

🔧 Fast Turnaround: Most repairs are completed within 1–3 business days.
📏 Precision Calibration: NIST-traceable calibrations included for most repairs.
🛡️ Warranty: 90-day warranty on all repairs.
📝 Transparency: Detailed evaluation and repair estimate before work begins.

✓ Evaluation Fee Credited Toward Repair

This evaluation fee is applied as credit toward your final repair cost. After we evaluate your equipment, you'll receive a detailed estimate before any repair work begins.

Description

Sorensen AST400-4.3 Power Supply Repair and Calibration

The Sorensen AST400-4.3 is a programmable DC power supply — 400 V / 4.3 A, ~1700 W, from the AST series for ATE and industrial test. Its character is regulated higher-voltage DC under programmable control, so faults concentrate in the output stage, regulation, and cooling.

June Company repairs and calibrates the Sorensen AST400-4.3 for test-engineering and industrial users.

Common Sorensen AST400-4.3 problems we fix

Output-regulation failure — output won’t hold setpoint, the regulation loop repaired and recalibrated for stable DC.
Ripple and noise increase — filtering/regulation degradation raising output noise, corrected to spec.
Won’t reach voltage — output-stage failure, rebuilt for full 400 V / 4.3 A.
Cooling-system service — fan/thermal faults causing shutdown under load.
Programming/communication faults — restored.

FAQs

My AST400-4.3 output is noisy or won’t regulate — fixable? Yes. Regulation and filtering faults are repairable, then verified so output is clean and stable to spec, with a NIST-traceable certificate.

Is the output verified? Yes — voltage, current, and regulation are checked against spec.

Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.

Brand

Sorensen Repair

Sorensen gear comes to us for repair and calibration, mostly power supplies. Sorensen work by type: Power Supply Repair. Examples of Sorensen equipment we service: the Sorensen AST100-100 Power Supply, Sorensen AST100-17 Power Supply and Sorensen AST100-34 Power Supply. A repaired power supply from Sorensen ships calibrated to NIST-traceable standards, under a 90-day warranty. You approve a firm Sorensen quote before work begins.

Shipping & Returns

Packing your equipment. You are responsible for packaging equipment adequately for transit. We strongly recommend the original manufacturer’s case, or double-boxing with at least two inches of shock-absorbing material on all six sides. We return your equipment in the packaging it arrived in, so please send it in packaging that will survive the return trip as well. If your packaging is damaged or inadequate for the return, we will substitute suitable packaging and may charge the cost of materials.

Insurance. Equipment is not insured by June Company while in transit. We strongly recommend insuring your shipment for its full replacement value.

Risk of loss. Risk of loss remains with you until your equipment is received at our facility, and transfers back to you when your repaired unit is delivered to the carrier (F.O.B. shipping point). June Company is not responsible for equipment lost, delayed, misdelivered, or damaged in transit, in either direction.

Return label. A prepaid and preprinted return shipping label should be included with your shipment. If one is not included, we will provide one.

Transit damage. Damage occurring in transit is the responsibility of the carrier. It is not a warranty defect and is not covered by the 90-day repair warranty. Any claim must be filed by you with the carrier; we will supply photographs and documentation to support it at no charge.

Full details: Terms & Conditions, Section 6 · Return Policy