Genrui WP21B - Appendix 1: Replacing Printing Paper; Printing Paper Installation

WP21 Series Operation Manual Chapter 7 Daily Use and Maintenance
64
Fault
Description
Cause Analysis
Troubleshooting
The screen is
blurred or too
dark
The display contrast
of the LCD changes
with the environment
Adjust the contrast
regulator inside the
instrument
The printer
does not print
1. The printing paper
is unavailable
2. The printing paper
is seized up after
paper tearing
3. The heat-sensitive
printing paper is
inserted reversely
4. The printer
temperature is too
high
1. Replace with new
printing paper
2. Adjust the location of
printing paper
3. Reinsert the printing
paper
4. Print again after the
printer cools down
Failed to test
the
absorbance
1. The absorbance
testing at a
specific
wavelength fails,
but the testing at
other wavelengths
are normal:
Distilled water is
not used
2. The absorbance
testing at all the
wavelengths fails:
1. Test again with clean
and fresh distilled water
2.
A Remove the air
bubbles in the
cuvette
B Wash the cuvette with
cleaning solution
C Replace the
light-source lamp