Klavis Module Repair
Professional Klavis Repair & Diagnostics in the USA
Precision Voltage Labs provides professional repair, diagnostics, and calibration services for Klavis Eurorack modules and electronic musical instruments. We support customers throughout the United States with reliable mail-in repair service for both current-production and legacy Klavis products.
Klavis has earned a reputation for designing highly innovative Eurorack modules that combine powerful digital processing, precision analog circuitry, and compact, feature-rich interfaces. Based in Belgium, Klavis products are known for delivering exceptional functionality in small form factors while maintaining reliability and performance. Modules such as Twin Waves, Quadigy, Flexshaper, Grainity, and CalTrans have become popular among musicians seeking advanced synthesis, modulation, sequencing, and calibration capabilities within modern Eurorack systems.
As these modules continue to see years of studio and live performance use, reliable repair and technical support remain essential for maintaining long-term functionality and preserving these sophisticated instruments.
Our repair process focuses on careful diagnostics, component-level troubleshooting, calibration verification, and long-term reliability. We have extensive experience servicing digital signal processing systems, microcontroller-based architectures, display electronics, precision analog circuitry, control voltage processing systems, and mixed-signal electronics commonly found throughout the Klavis product line.
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Common Klavis Repairs
We regularly diagnose and repair issues including:
Reverse polarity damage
Power rail failures
Display failures
OLED display issues
Encoder and button failures
Audio output problems
Calibration faults
Control voltage processing issues
MIDI and synchronization problems
Firmware-related issues
Intermittent operation
Startup and boot failures
Physical connector damage
Ribbon cable damage
PCB-level component failures
Mechanical stress damage
Aging component failures
Many issues that initially appear catastrophic are often repairable with proper diagnostics and component-level repair techniques.
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Klavis Modules We Commonly Service
Oscillators & Sound Sources
Twin Waves MkII
Twin Waves EX
Grainity
Flexshaper
Modulation & Utility Modules
Quadigy
CalTrans
Tweakers Plus
Mixwitch
Logica XT
Two Bits
Sequencing & Control Modules
Pattern Generator
Trigger and Gate Processing Modules
Control Voltage Utilities
Clocking Systems
Signal Processing Modules
Flexshaper
Analog Utility Modules
CV Processors
Logic Modules
Legacy Products
Early Klavis Modules
Discontinued Products
Limited Production Releases
We also service discontinued and legacy Klavis products that remain active in studios and performance systems worldwide.
Diagnostics & Technical Repair Process
Modern Klavis modules often combine:
digital signal processing
microcontrollers and embedded processors
precision analog circuitry
OLED displays and user-interface systems
switching and linear power systems
control voltage processing architectures
timing and synchronization systems
dense surface-mount PCB layouts
Symptoms do not always reveal the underlying failure. A module with startup issues, display failures, calibration problems, audio faults, or unstable operation may involve multiple subsystems including voltage regulation, firmware, display electronics, memory systems, DSP hardware, control circuitry, or analog signal path faults.
At Precision Voltage Labs, repairs begin with detailed diagnostics to identify root-cause failures before unnecessary parts replacement occurs.
Repair and testing capabilities include:
PCB-level diagnostics
Surface-mount soldering and rework
Oscilloscope-based signal tracing
Voltage rail analysis
Audio path troubleshooting
Display diagnostics
Encoder and control diagnostics
Control voltage testing
Firmware-related troubleshooting where applicable
Connector and mechanical repair
Calibration verification
Power supply diagnostics
All repairs are performed in an ESD-safe workspace using professional electronics diagnostic equipment.
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Support for Current and Legacy Klavis Products
Klavis modules have become increasingly popular due to their innovative feature sets, compact designs, and ability to solve complex synthesis challenges within limited rack space. Many users rely on Klavis products as core utility, modulation, and sound-generation tools within their Eurorack systems.
As modules age, displays, controls, power systems, and electronic components may require maintenance or repair. Professional diagnostics can help restore proper operation and extend the useful life of these highly capable modules.
Precision Voltage Labs provides diagnostic and repair support for both current-production and many discontinued Klavis products whenever repair is technically feasible.
Mail-In Repair Service
Precision Voltage Labs provides secure mail-in repair service throughout the United States.
Customers can contact us for:
repair evaluation
shipping instructions
packaging guidance
turnaround estimates
diagnostic consultation
Because many Klavis modules utilize displays, encoders, and compact user interfaces, careful packaging is recommended to protect controls and screens during shipment.
Modules should always be packaged carefully using anti-static protection and adequate padding during shipment.
Frequently Asked Questions
Do you repair discontinued Klavis modules?
Yes. We regularly service legacy and discontinued Klavis products depending on parts availability and overall repair condition.
Do you repair Twin Waves modules?
Yes. We diagnose and repair many issues affecting Twin Waves oscillators, including startup problems, calibration issues, display failures, power-related faults, and audio path problems.
Do you repair Quadigy and CalTrans modules?
Yes. We service many issues affecting envelope generators, calibration systems, utility modules, displays, and control electronics.
Can OLED display failures be repaired?
In many cases, yes. Display-related issues are often repairable depending on component availability and the nature of the failure.
Can firmware-related issues be repaired?
In many cases, yes. Startup failures, firmware corruption, memory-related faults, and communication issues can often be diagnosed and resolved.
Do you provide calibration services?
Yes. Calibration verification and adjustment are included where appropriate as part of the repair and testing process.
How do I request repair service?
Please contact us through our Contact page with:
module model
symptoms
known damage history
photos if available
We will provide next-step instructions and mail-in guidance.
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Independent Repair Service Notice
Precision Voltage Labs is an independent repair service provider and is not affiliated with or endorsed by Klavis or any related entity unless explicitly stated. All trademarks and product names remain the property of their respective owners.