Agilent Technologies U1840A Medalist sj5000 Hardware Manual page 147

Agilent U1840A Medalist sj5000 Hardware Manual
• Check the 2 Amp porcelain fuse inside the PC.
• Check the serial connector for the lighting controller.
• Check the image for isolated odd dots. If you find these,
replace the cables. Contact Agilent Support for the detailed
procedure.
• Check the image using the Intellicam software (see
Testing").
Lighting rings will not work
• Shut the system down completely and then restore power.
• Perform manual initialization by clicking individual rings in
the Lighting Controller window of the sj5000 software (from
the Tools menu, click the Lighting Controller folder).
• Try to calibrate using a Fotowand gray card (see
Calibration").
Lighting controller will not work
• Check that MCB Q3 and Q4 are on.
• Check that the 24 V DC power supply is on.
• Check that the LED on the lighting controller is on.
Images seem darker than normal
• Lighting rings need calibration. Lighting rings will degrade at
different rates depending upon use and variations
introduced during manufacturing. Therefore lighting
calibration should be verified during normal maintenance
schedules and more often if significant changes in the
required amperage are noted.
• Lighting rings or individual LEDs could be damaged or
non-functional. This can be verified using a dental mirror
under the camera and checking the LEDs from the image in
the Lighting Controller window. If a burned out LED is noted
during maintenance procedures contact Agilent Support
immediately.
• The camera aperture may have been changed. Reset it to F5.6
(see "Setting the Lens Aperture").
11
Troubleshooting
"Camera
"Lighting
11-13