Bio-Rad Gel Doc™ XR+ System - Manual (Page 42)

42
Section 6 Troubleshooting
Problem Possible Cause Solution
Image is not visible on the
monitor
•
Aperture is closed
•
Incorrect monitor settings
•
Wrong cable connections
•
Open the aperture
•
See your computer manual
•
See Appendix A for correct
cabling
Image is not bright enough
•
Wrong aperture setting
•
Insufficient exposure time
•
Open the aperture
•
Select longer exposure time
Impossible to image whole
sample area
•
Lens is zoomed-in too close
•
Zoom-out the lens
Printout does not look the
same as the image on the
monitor
• Monitor settings are wrong
• Thermal printer settings are
wrong
•
Read the manual for the printer to
ensure proper settings
Light leakage into the
darkroom
•
The lens body is not properly
centered and against the light
seal gasket on the hood
• Τhe rear hole on the MZL not
closed with the screw
•
Loosen the bracket and move the
camera around, to properly seal
the hood opening or adaptor plate,
as the case may be
•
Close the hole with the black
plastic screw
Hot (very bright) pixels are
seen in the image
(ChemiDoc
™
XRS only)
•
Hot pixels are more
susceptible to dark current
than surrounding pixels.
•
Select reference by clicking on
the appropriate box in the Options
window
Hot (very bright) pixels are
seen in the image
(Gel Doc XR only)
•
Corrupted reference dark
image
•
Click on Options button and then
click on Reset Reference Dark
ChemiDoc XRS camera will
not respond/camera not
found
•
Camera power may be turned
off
•
Controller cables may not be
seated properly
•
Software driver for the
camera is missing
•
Computer power-saving
modes may be interfering
with the camera driver
•
Multiple FireWire devices
are installed on the same
computer
•
Camera may be defective
•
Turn ON the power to the camera
•
Make sure that all cables are
connected properly
•
Install Quantity One software
again if the camera driver is not
present
•
Disable power-saving modes on
the computer
•
Exit out of the Quantity One
software and turn off power to the
ChemiDoc XRS camera
•
Power the camera back on and
restart the software
•
Replace camera
ChemiDoc XRS image will
not autoexpose
•
The sample is too bright and
saturates the image at the
minimum possible exposure
•
Close the Iris control until
autoexpose is possible
Unable to focus on the
sample using white light
transilluminator or
conversion screen
•
Aperture is open too wide
causing a shallow depth of
field
•
Close the iris slightly and then
focus again. Repeat until good
focus is achieved