Canon C2050 Service Handbook page 207

<HV-SP>
Use it to adjust the separation charging bias.
Settings: -3 to +3
(A higher setting increases the output.)
Default: 0
SP-N1L
Use it to adjust the output occurring while plain paper/single-sided copy (or
the 1st side of a double-sided copy) is being fed in a low-humidity environ-
ment.
SP-N2L
Use it to adjust the output occurring while plain paper/double-sided copy
(i.e., its 2nd side) is being fed in a low-humidity environment.
SP-T-1L
Use it to adjust the output occurring while thick paper/single-sided copy (or
the 1st side of a double-sided copy) is being fed in a low-humidity environ-
ment.
SP-T-2L
Use it to adjust the output occurring while thick paper/double-sided copy
(i.e., its 2nd side) is being fed in a low-humidity environment.
SP-OHP-L
Use it to adjust the output occurring while a transparency is being fed in a
low-humidity environment.
SP-S1-1L
Use it to adjust the output occurring while special paper/single-sided copy
(or the 1st side of a double-sided copy) is being fed in a low-humidity envi-
ronment.
SP-PO-1L
Use it to adjust the output occurring while a postcard/single-sided copy (or
the 1st side of a double-sided copy) is being fed in a low-humidity environ-
ment.
SP-N1N
Use it to adjust the output occurring while plain paper/single-sided copy (or
the 1st side of a double-sided copy) is being fed in a normal-humidity envi-
ronment.
SP-N2N
Use it to adjust the output occurring while plain paper/double-sided copy
(i.e., its 2nd side) is being fed in a normal-humidity environment.
SERVICE MODE
COPIER>ADJUST
S-65