What the Service Includes
Control board repair is a complex task requiring specialized equipment and expertise in power and digital electronics. The service includes:
- detailed diagnostics of the board on a test bench and inside the machine
- visual inspection for burnt spots, swollen capacitors, corrosion
- checking power supply lines, output voltages, regulators
- testing power components (relays, triacs, MOSFETs, IGBTs)
- verification of microcontroller, flash memory, crystal oscillators
- replacement of electrolytic and ceramic capacitors
- repair or replacement of output relays (boiler, pump, valves)
- soldering / resoldering contacts, trace repair on PCB
- replacement of optocouplers, drivers, voltage regulators
- inspection and replacement of onboard temperature sensors (if present)
- firmware reading and restoration (when required)
- bench testing of the repaired board with load simulation
- reinstallation of the board into the coffee machine
- full functional testing of all machine operations after repair
Service is performed on boards from De’Longhi, Saeco, Philips, Jura, Krups, Siemens, Bosch, Gaggia, Melitta, Nivona, Franke, and many other brands.
When Control Board Repair Is Needed
Common symptoms pointing to a faulty control board:
- machine does not power on at all (no lights, no sound, dead display)
- freezes during warm-up or self-test phase
- random or meaningless error codes / symbols on display
- buttons unresponsive or behave erratically
- boiler does not heat or heats continuously without stopping
- pump runs constantly or does not start
- valves fail to open/close
- errors like “general error”, “electronics”, “main board”, “E01–E99”
- all settings reset after power-off
- relays click but nothing happens
- visible swollen capacitors, burnt areas, darkened PCB traces
- machine randomly shuts down or reboots
Most failures result from power surges, overheating, moisture ingress, wear of power components, or natural aging of electrolytic capacitors.
Repair Stages
- Initial diagnostics — symptom analysis, error code reading, input voltage check
- Removal of the control board from the machine
- Visual and instrumental inspection (magnifier, microscope, multimeter)
- Verification of all power rails and regulators
- Testing power components under load
- Replacement of swollen / leaking capacitors
- Repair of PCB traces, resoldering joints, replacement of burnt parts
- Testing and replacement of relays, triacs, transistors
- Checking microcontroller and peripherals
- Firmware reading and backup (if required)
- Bench testing of the repaired board
- Reinstallation into the coffee machine
- Full testing of all functions: heating, brewing, steam, menu, sensors
- Extended run test after several cycles
- Cleaning board and machine from repair residues
Why Choose Grade in Khmelnytskyi
Grade has years of experience repairing coffee machine control boards in Khmelnytskyi and the region. We are equipped with professional tools for diagnostics and soldering (soldering station, oscilloscope, programmer, test benches). We restore original boards whenever possible — this is significantly more cost-effective than buying new ones. Every repaired board is fully tested under real operating conditions. Clients receive a clear diagnostic report and agreed pricing before any work begins. See real customer reviews here: reviews. Besides control board repairs we also offer full coffee machine repair, robot vacuum repair, charging station repair, and other appliance services. Contacts: +380 97 719 4430, Telegram. Schedule: Mon–Sun 11:00–20:00. Address: Khmelnytskyi, Panasa Myrnoho St., 31/3.
Easy from Anywhere in Ukraine
Can’t bring your coffee machine to Khmelnytskyi? Ship it via Nova Poshta. We accept machines from any city in Ukraine, perform control board diagnostics and repair, then return the fully serviced appliance. All shipping details are available here: shipping via Nova Poshta. Convenient for customers from Kyiv, Odesa, Lviv, Dnipro, Kharkiv, and other regions.
