Component-level repair • RF systems • Computer hardware

Hands-on technical work, presented with clarity.

Justin Jarrell is an electronics and computer repair technician based in North Carolina with experience spanning MRI and CT component repair, wire harness development, soldering, schematics, diagnostics, and computer systems troubleshooting.

View Experience Open Media Showcase

Based InDanbury / Winston-Salem, NC

FocusElectronics, RF, repair, testing

BackgroundHardware, networking, diagnostics

Portfolio media item 1 — Featured image · 1/50

Portfolio media item 2 — Featured image · 2/50

Experience

MRI Repair Technician (RF / Power Systems)

Carolina Medical · Winston-Salem, NC

June 2020 — Present

Diagnosed and repaired MRI and CT system components at the PCB level, including RF amplifiers, gradient amplifiers, and coil assemblies.
Performed root-cause analysis on complex system failures across RF, power, and digital subsystems.
Reverse engineered circuit boards and developed schematics directly from PCB layouts.
Troubleshot multi-channel RF systems, ensuring proper tuning, matching, and channel balance.
Developed and executed test procedures, including automation using C++ scripting.
Performed advanced PCB repair including trace reconstruction and fine-pitch component rework.
Diagnosed thermal, electrical, and signal integrity issues in high-power systems.
Validated repairs through repeated system testing and performance verification.
Repaired high-current failures including rectifiers, bus structures, and power distribution paths.

Lead Wire Harness Technician

Cross Technology · Winston-Salem, NC

July 2019 — Present

Led wire harness development, repair, and production processes across multiple projects.
Soldered and assembled military-grade connectors and complex wiring systems.
Designed and prototyped custom wire harness assemblies for new applications.
Improved team productivity through new techniques and process improvements.
Diagnosed and maintained manufacturing equipment used in wire development processes.
Researched datasheets and component specifications to support design and repair decisions.

Electronics Technician

Salem Technologies · Winston-Salem, NC

March 2017 — July 2019

Performed PCB-level troubleshooting including detection of shorts, opens, and defective components.
Reworked through-hole and surface mount components (SOIC, QFP, QFN) using hot air and soldering systems.
Programmed and read microcontrollers and flash memory using JTAG and ICSP interfaces.
Built custom programming adapters and test fixtures for board validation.
Conducted functional testing using complex procedures and diagnostic setups.
Tuned regulated current and voltage supply systems.
Managed inventory and supported production workflows.

Computer Technician

Computer Zone · Kernersville, NC

August 2015 — March 2017

Diagnosed and repaired PC hardware including motherboards, power supplies, and storage devices.
Performed data recovery, OS installation, and system configuration.
Repaired laptops including DC jack soldering, screen replacement, and board-level fixes.
Managed daily store operations independently.

Technical Skills & Expertise

Comprehensive summary of component-level troubleshooting, repair capabilities, and system validation.

Core Competencies

Component-Level Troubleshooting RF & Gradient Amplifiers Failure Analysis Schematic Interpretation Thermal Imaging H-Bridge Circuits Surface Mount Technology Precision Soldering Root Cause Identification Computer Hardware Linux & Windows Server Networking (TCP/IP, DNS, VPN) Active Directory & VMWare PLC Experience

Electronics & Circuit Expertise

H-bridge circuits, gate drive systems, and IGBT/MOSFET control
Snubber networks (resistor/capacitor design, testing, and failure analysis)
Rectifier circuits and diode performance validation
Current sensing and monitoring circuits (op-amps, transducers, feedback loops)
Low and high-voltage power supply and analog/mixed-signal diagnostics

Repair & Rework Capabilities

Precision soldering and rework (surface mount and through-hole)
Heat-assisted repair (hot plate, controlled reflow, thermal methods)
PCB repair including trace restoration and pad reconstruction
Connector replacement, re-termination, and mechanical correction
Component harvesting and obsolescence cross-referencing

Testing, Systems & Validation

System-level execution (hammer, static, fidelity) and repetitive validation testing
Pre-burn and post-burn performance verification and data capture
Signal calibration, gain adjustment, RF path balancing, and pre-amplifier tuning
Multi-channel amplifier, CAN bus, and RF transmission system diagnostics
Integration testing of repaired systems within full operational environments

Advanced Troubleshooting

Thermal comparison analysis between functional and failed channels
Identification of component drift (resistance, capacitance, thermal deviation)
Diagnosis of timing-related faults such as cross-conduction (i-cross current)
Rapid identification of non-obvious faults using indirect indicators
Ability to diagnose systems where standard test results are inconclusive

Key Achievements & Quality Process

Complex Fault Resolution: Diagnosed and resolved faults caused by subtle component deviations (e.g., diode forward voltage variation, capacitor drift, thermal anomalies).
System Restoration: Restored systems previously deemed non-repairable through advanced troubleshooting techniques and subsystem substitution.
Performance Optimization: Improved system performance and reliability through precise calibration and component-level corrections.
Process & Compliance: Execution and documentation of formal test procedures (TDS, TP), maintenance logs, QA validation, and structured troubleshooting workflows.

Education

Bachelor's in Computer from ECPI University in Virginia Beach, Virginia.

License

Non-CDL Class C Driver's License.

Contact

justinpjarrell@icloud.com +1 336 934 2969