Denver E200 RM Benutzerhandbuch Seite 76

Adjusting the gear changing system
Your bicycle has several manually interchangeable speeds with a
system with a rear derailleur. Use the right handle to make the
desired change.
The higher the indicator, the more difficult it will be to pedal and
vice versa.
Careful, never pedal backwards while changing gears and never
force the command lever.
For an optimum use of the gear-changing system, we recommend
avoiding changing gear other than during heavy pedalling sessions.
Adjusting the limit screws
The derailleur's range of movement can be adjusted with the H and L screws.
The L screw allows you to adjust the upper limit (on the side of the largest
sprocket).
When you loosen the L screw, the chain is positioned more towards the
outside of the largest sprocket.
The H screw allows you to adjust the lower limit (on the side of the smallest
sprocket).
When you loosen the H screw, the chain is positioned more towards the
outside of the smallest sprocket.
These actions are performed by a quarter of a turn at a time. At each
adjustment, you should achieve a perfect alignment between the sprocket,
the chain and the pulley of the rear derailleur.
Rear derailleur diagram:
Larger sprocket
Pulley-guide
H screw
L screw
76
Pulley-guide