APLAB Repair Services India
APLAB (Autonomous Power and Laboratory Electronics) is an Indian manufacturer of precision power supplies, stabilizers, and industrial control systems headquartered in Maharashtra. Known for robust AC/DC power conditioning equipment and UPS systems, APLAB serves automotive, pharmaceutical, telecom, and manufacturing sectors across India with reliable, cost-effective solutions built for Indian operating conditions.
APLAB (Autonomous Power and Laboratory Electronics) is an Indian manufacturer of precision power supplies, stabilizers, and industrial control systems headquartered in Maharashtra. Known for robust AC/DC power conditioning equipment and UPS systems, APLAB serves automotive, pharmaceutical, telecom, and manufacturing sectors across India with reliable, cost-effective solutions built for Indian operating conditions.
Synchronics has repaired APLAB power supplies, voltage stabilizers, servo stabilizers, and battery backup systems for over two decades. Our 180+ engineers understand APLAB's discrete-based and SMPS architectures, transformer designs, and control circuits. We handle everything from analog regulator cards to digital PWM controllers — restoring APLAB equipment to full operational spec.
Expert repairs of APLAB power supplies, stabilizers, and industrial UPS systems across India.
APLAB Product Lines We Repair
Our engineers are trained on the full APLAB product range. Below are the major product families we service.
APLAB Servo Stabilizers
Single and three-phase servo stabilizers for sensitive industrial loads. Common faults include servo motor failures, voltage sensing circuit drift, relay chattering, and control PCB capacitor aging. Stabilizer output gradually drifts or hunting occurs under load.
APLAB SMPS/Power Supplies
Industrial-grade switched-mode power supplies with isolated outputs. Repair challenges include primary MOSFET burn-out, transformer secondary winding shorts, output regulation loss, and optocoupler degradation causing feedback loop instability.
APLAB Online UPS Systems
Three-phase online UPS for critical industrial loads, 5 kVA to 500 kVA. Typical failures: battery charger PCB faults, inverter gate driver IC failures, static switch thyristor degradation, and transformer winding insulation breakdown.
APLAB Voltage Stabilizers (Fixed)
Fixed output AC stabilizers with step or tapless regulation. Common issues: transformer tap selector relay wear-out, varistor aging causing surge failures, control transformer burning, and output voltage sensing potentiometer drift.
APLAB Battery Chargers
Industrial-duty lead-acid and lithium battery chargers with current limiting and temperature compensation. Failures include transformer core saturation, rectifier diode bridges failing, control IC resets, and thermistor sensor drift.
Why Choose Synchronics for APLAB Repairs?
PCB-Level Expertise
We repair down to the component level — not just swap boards. Our engineers identify root causes, replace failed IGBTs, capacitors, processors, and gate drivers on APLAB equipment.
Fast Turnaround
Standard 7–10 working days. Express 3–5 days available for critical breakdowns. Emergency same-day/next-day service for unplanned downtime.
6-Month Warranty
Every repaired unit ships with a 6-month comprehensive warranty on parts and labour. Our repair success rate is over 94% across all brands.
All-India Service
Couriered repairs accepted from any city in India. Doorstep pickup available in Vadodara, Mumbai, Pune, Ahmedabad, Surat, Chennai, and more.
Common APLAB Equipment Faults We Fix
Based on 30+ years of repair data, these are the most frequent failure modes we see in APLAB equipment arriving at our workshop.
- ✓Servo Stabilizer hunting and voltage overshoot — APLAB servo stabilizer hunting occurs when the servo motor feedback potentiometer drifts or the error amplifier IC (typically TL072 or similar) capacitors age, causing the servo loop to oscillate around the setpoint. The proportional gain constant shifts with temperature.
- ✓APLAB SMPS primary MOSFET short circuit — High inrush currents, voltage spikes from transformer leakage inductance, or gate drive circuit failures cause APLAB SMPS MOSFETs (typically IRF540, IRF740) to short. The resulting primary-to-secondary short kills the output.
- ✓UPS three-phase inverter thyristor misfire — APLAB online UPS thyristor gate drivers weaken with age, or snubber capacitors fail, causing irregular gate pulses. Phase sequence sensing circuits can also fail, leading to commutation failure and distorted three-phase output.
- ✓Fixed stabilizer transformer tap selector relay chatter — APLAB CVT and AVR stabilizers use electromechanical relay banks for tap selection. Relay contacts oxidize, springs weaken, or the sensing potentiometer develops intermittent faults, causing the relay to chatter between taps at 50-100 Hz.
- ✓Battery charger transformer primary open circuit — APLAB BC series chargers experience transformer primary winding open due to thermal stress, mechanical vibration loosening wire connections, or insulation breakdown from moisture ingress and temperature cycling typical in Indian factory floors.
- ✓UPS battery charger low output current or no charge — APLAB UPS charger failures stem from rectifier diode bridge degradation, charging current sensing resistor thermal drift, or control IC (often L4970 or TL494) latch-off due to false overcurrent sensing. Output diode failure also prevents charge.
How We Repair Your APLAB Unit
Receive & Log
Your unit is logged into our tracking system with a unique job number. You receive WhatsApp / email updates at every stage.
Fault Diagnosis
Board-level diagnosis using oscilloscopes, LCR meters, and thermal cameras. Root cause identified before any repair begins.
Component Repair
Faulty ICs, capacitors, MOSFETs, IGBTs, and gate drivers replaced with genuine or equivalent-spec components.
Full-Load Test
Unit tested under rated load with original or equivalent motor. All parameters verified. 6-month warranty issued.
Industries Using APLAB Equipment
We serve plant maintenance teams across all major industries where APLAB automation is deployed.
Frequently Asked Questions — APLAB Repairs
Do you repair APLAB equipment anywhere in India?+
Yes. Synchronics repairs the full APLAB product range — servo stabilizers, SMPS units, online UPS systems, voltage regulators, and battery chargers. We offer PAN India door pickup from Mumbai, Delhi, Pune, Chennai, Hyderabad, Ahmedabad, Bangalore, Kolkata, and all other metro and tier-2 cities. Main repair facility in Vadodara, Gujarat. Turnaround is typically 5-7 working days for most APLAB faults.
What is the typical repair cost for an APLAB servo stabilizer failure?+
APLAB servo stabilizer repair costs range from INR 8,000 to 25,000 depending on fault severity. Simple servo motor replacement or capacitor refresh runs INR 8,000-12,000. Complete servo control board replacement or transformer rewinding runs INR 20,000-25,000. Synchronics provides free diagnosis and written quotation before work begins. We also offer 12-month warranty on servo motor and 6-month on all electronic components.
Can you repair APLAB UPS that shows low battery voltage or no inverter output?+
Yes. Low battery voltage typically indicates a failed charger stage — Synchronics tests the rectifier diodes, charging IC, and current-sense network. No inverter output usually means a thyristor gate driver IC failure or commutation snubber capacitor open circuit. We use curve tracing and ESR testing on all capacitors, replace faulty thyristor gate drivers, and verify three-phase synchronization. Full 4-hour load testing is performed before delivery.
Does Synchronics stock original APLAB spare parts?+
We stock critical APLAB components: servo motors (1/4 to 2 HP), transformer kits, rectifier bridges, optocouplers, and control ICs. For rare components, we source from authorized APLAB distributors or use exact substitutes after engineering validation. Most repairs use original APLAB or equivalent military-grade components. Lead time for exotic parts is typically 2-3 weeks.
What warranty does Synchronics offer on APLAB repairs?+
Synchronics offers a standard 12-month warranty on all repaired APLAB equipment covering parts and labor for the same fault. Mechanical parts (servo motors, relays) carry 6-month warranty. Warranties are conditional on proper installation, correct input voltage, and no user-induced damage. Optional extended warranty up to 24 months is available at 15% of repair cost.
How do I send my APLAB unit for repair?+
Pack the unit securely and courier it to our Vadodara workshop. Include a note with the fault description and your contact details. We will log it into our system and WhatsApp you a job number within 24 hours of receipt. Doorstep pickup is available in Vadodara, Ahmedabad, Surat, Mumbai, and Pune.
What is the cost of repairing a APLAB drive or PLC?+
Repair cost depends on the model and the fault. We offer a free diagnosis — once we identify the fault, we provide a fixed quotation before proceeding. Typical repairs cost 20–40% of the new unit price. We will never repair without your approval.
What warranty do you provide on APLAB repairs?+
All repaired units carry a 6-month comprehensive warranty covering the same fault and related issues. If the fault recurs within the warranty period, we repair it free of cost.
Do you provide a no-fix, no-fee guarantee?+
Yes. If we cannot repair your APLAB unit after diagnosis, you pay only the diagnosis fee (₹500–₹1,500 depending on the product). The unit is returned to you at no additional charge.
APLAB Repair Catalog
No products found for APLAB
Don't See Your APLAB Model Listed?
We repair the full range of APLAB industrial electronics — even if the specific model is not yet in our catalog. Send us the unit details and we'll confirm repairability within 24 hours.
Free evaluation • 6-month warranty • PAN India pickup
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Back in Action — Fast
Send us your faulty industrial electronics. Our engineers will diagnose it and provide a detailed quote within 24 hours — with no obligation to proceed.
Free Evaluation
No obligation
48hr Turnaround
Fastest in India
6-Month Warranty
Every repair
No Fix, No Charge
Zero risk policy
Pan-India Pickup
Doorstep service