Stryker L9000 - Service Manual

The Stryker L9000 Light Source is a medical device designed to illuminate surgical sites during endoscopic procedures. It utilizes an LED module to generate light, which is then delivered to the surgical site via a fiberoptic light cable. The L9000 is compatible with all Stryker light cables and can connect to most flexible or rigid endoscopes with the appropriate light cable and adapters.

Usage Features:

The L9000 is equipped with Electronic Scope Sensing Technology (ESST), a safety feature that helps prevent accidental burns caused by an unconnected light cable. When an ESST light cable, such as a Safelight™, is used, the L9000 detects when the scope and light cable are separated and automatically switches the light source to Standby mode. In Standby mode, the L9000 reduces light output to a minimum, preventing the light cable from generating excessive heat.

To avoid the risk of burns and/or fire, it is crucial to adjust the brightness level of the camera and monitor before adjusting the light source's brightness. The light source brightness should be set to the minimum level necessary for adequate illumination of the surgical site. Adjusting the internal shutter of the camera to a higher setting allows the light source to operate at a lower intensity. Users should avoid touching the scope tip or light cable tip to the patient and never place them on top of the patient, as this can cause burns. Similarly, the scope tip, scope light post, light cable adapter, or light cable tip should never be placed on surgical drapes or other flammable materials to prevent fire. The light source should always be placed in Standby mode when the scope is removed from the light cable or when the device is unattended. It's important to note that these components will take several minutes to cool down after being placed in Standby mode and can still pose a risk of fire or burns.

The front panel features a display that shows "Standby" when the light source is on, along with a brightness display in the bottom right corner. The up/down buttons on the LCD can be used to increase or decrease the brightness number without exiting Standby mode. Pressing the Run/Standby button on the LCD switches the light source to Run mode, with the brightness percentage matching the previously set number. The brightness can be adjusted from 0% to 100% and back without skipping steps.

To remove the light cable, the knob on the jaw assembly should be turned clockwise. This action should lock the jaw open, turn off the bulb, and put the light source into Standby mode.

Maintenance Features:

Cleaning:

Before cleaning, the L9000 must be unplugged. The external surfaces can be cleaned with a cloth or sponge dampened with a mild detergent or disinfectant. Abrasive cleaners should not be used, and no liquid should be allowed to drip into the unit. The L9000 should never be sterilized or immersed in liquid. The light cable should be cleaned and maintained according to the manufacturer's instructions.

Fuse Replacement:

To replace fuses, first unplug the light source from the AC outlet and remove the power cord. Unlatch the fuse holder and remove the fuse(s). Replace the fuse(s) with new ones of the same value and rating (5.0A 250V fuses are specified to avoid fire risk). Finally, reinstall the fuse holder.

Troubleshooting and Repair:

The manual provides solutions for common issues such as a loose or cracked jaw handle, power button malfunctions (not lighting up or sticking), and LCD display problems (not displaying or touch screen not activating). Error codes (E-1 to E-5) are defined, with recommended actions ranging from returning the L9000 for repair to replacing specific components like the LED (heat pipe) fan.

Repair and replacement procedures are detailed for various components, including the chassis cover, jaw handle, power button/LED, LCD/front board, LED (heat pipe) fan, AC inlet filter, and ESST sensor/contact. These procedures require specific tools such as Phillips screwdrivers, Allen wrenches, hex wrenches, needle-nose pliers, and Loctite 222.

Important Safety Precautions for Repair:

All repairs should be performed by trained technicians with proper equipment. Dangerous voltages are present in AC-powered devices, and adequate safety precautions must be taken to prevent damage, injury, or death. ESD protection is required during assembly to prevent damage to electrical components. Loctite should be applied to threaded holes rather than screw threads unless otherwise specified.

Final Testing and Inspection:

After maintenance or repair, the device undergoes a series of tests:

Cosmetic Inspection:

The front panel, chassis, and chassis cover should fit snugly without visible gaps. Logos and printing on both the back and front panels should be clear. The jaw handle should turn freely without rubbing against the front panel. All connectors should be properly oriented, and all surfaces should be smooth and free of scratches or dents.

Power on Test:

The L9000 should be connected to a 120V power supply. The power button should be pressed to verify that the console powers on. Inserting the light cable into the jaw and pressing the activate button should bring the light source out of Standby mode, and the LED should light up.

Fan Test:

Both fan labels should face out, and when the power is turned on, the fans should blow air out the back of the console.

Front Panel Functional Test:

When the light source is on, the display should show "Standby" and a brightness display in the bottom right corner. The up/down buttons should increase/decrease brightness without exiting Standby mode. Pressing the Run/Standby button should switch the light source to Run mode, maintaining the previously set brightness percentage.

Brightness Step-Up/Down:

The brightness should be adjustable from 0% to 100% and back using the up/down buttons, with the display increasing or decreasing without skipping.

Jaw Test:

Removing the light cable by turning the knob clockwise on the jaw assembly should lock the jaw open, turn off the bulb, and put the light source into Standby mode.

Hi-Pot/Di-Electric Breakdown Test:

The Hi-Pot tester should be energized and adjusted to 1.8 kV. The test fixture is plugged into the back of the unit, and an alligator clip is connected to the ground post. The positive (red) probe is touched to the Hi-Pot test fixture, and the test button is pressed for 1 second. The Hi-Pot tester should always be checked for proper functionality before use, and the unit should not be tested for more than 1 second to prevent internal damage.

Stryker L9000 Specifications

General

Category	Medical Equipment
Light Source Type	LED
Power Supply	100-240 VAC, 50/60 Hz
Type	Light Source
Intensity Control	Adjustable
Dimensions	305 mm x 152 mm x 381 mm