Accessing the inside – Domobar Junior

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Power off the espresso machine and disconnect the plug from the outlet. To avoid burning yourself, allow the machine to cool down at least 2 hours before moving forward.

A close-up of a metallic toggle switch mounted on a gray panel, with on labeled above and off below the switch. The switch is currently set to the on position. © 2025 1st-line.com
A black electrical power cord with a two-prong plug rests on a white surface. © 2025 1st-line.com

Remove the top cover and the water tank inside.

A close-up of a metal medical device with a perforated tray labeled The Novace® Solution for LASER Fiber & LASER CO2 in blue text, attached to a shiny, chrome machine. © 2025 1st-line.com
A white plastic water tank with a clear tube attached, positioned next to a metallic machine on a white surface, likely part of a liquid dispensing or filtration system. © 2025 1st-line.com

From here you will have access to the following:

  • the manufacturer’s label which has the serial number and certifications.
  • the pressurestat adjustment – using a flathead screwdriver, turn clockwise for more boiler pressure, and counterclockwise for less boiler pressure.
Close-up of a metal label on a VBM Domobar Junior espresso machine showing technical specifications including voltage, wattage, frequency, phase, and pressure details. The label also includes certification logos. © 2025 1st-line.com
A close-up of a stainless steel control panel shows a yellow button above a circular dial slot with plus and minus symbols and a curved arrow indicating adjustable settings. © 2025 1st-line.com

To gain access to the inside, the body panel must be removed. On the left and right sides of the machine, there are 3 screws (6 total). Once removed the body panel will slide off.

Close-up of a shiny metal appliance with three red arrows pointing to screws on a side panel, suggesting areas for removal or maintenance. A black power cord and part of a plastic tube are also visible. © 2025 1st-line.com
A stainless steel espresso machine side panel with three red arrows pointing at screws and the bottom corner foot. The machine is set against a white background. © 2025 1st-line.com

You will now have side access to the inside to diagnose the machine.

On the left side where the vibration pump is, you will be able to adjust the OPV. Using a flathead screwdriver, turn clockwise to increase pressure, counter clockwise to decrease pressure.

Close-up view of the internal components of an espresso machine, showing copper pipes, wires, connectors, and a pump inside a metal frame, with some parts exposed for maintenance or inspection. © 2025 1st-line.com
Side view of the internal components of an espresso machine, showing metal pipes, a large cylindrical boiler, copper tubing, and various fittings and cables arranged inside a metal frame. © 2025 1st-line.com
Close-up view of internal components of a machine, including wires, copper pipes, a brass fitting with a slot for a screwdriver, and a small electronic part labeled “Model Type EX5.”. © 2025 1st-line.com

More detailed pics of the inside

Close-up of electrical connectors attached to a black cylindrical XP110 component with a metal base, surrounded by copper tubing and other mechanical parts. © 2025 1st-line.com

Close-up of internal components of a machine, showing copper pipes, plastic tubing, electrical wires, and a solenoid valve labeled Model EAU-7B1-6AJS with technical specifications. © 2025 1st-line.com

Close-up view of internal components of a machine, showing brass fittings, copper tubing, and various colored electrical wires connected inside a metal enclosure. © 2025 1st-line.com

Close-up of electrical wires in various colors connected to white terminal blocks, next to a copper pipe and a black electronic component inside a metallic enclosure. © 2025 1st-line.com

Close-up of copper pipes, brass fittings, blue wires, and a metal rod inside a metal machinery casing, likely part of industrial or coffee machine equipment. © 2025 1st-line.com

Close-up view of wires in various colors (red, yellow, green, blue, black, and brown) connected inside a metal electrical or appliance compartment. Some components and tubing are also visible. © 2025 1st-line.com

Close-up of a metal component featuring copper pipes, brass fittings, and coiled copper tubing connected to a cylindrical base with wires and bolts, part of a mechanical or electrical machine. © 2025 1st-line.com

Close-up view of internal components of a machine, showing copper tubing, electrical wires, a black switch, and metal parts, with a partially visible 1st-line Equipment logo in the background. © 2025 1st-line.com

Close-up view of copper and brass plumbing connections inside a machine, with various pipes, wires, and plastic tubing visible in the background. © 2025 1st-line.com

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