Nespresso EF 451 C 111, Service Manual, Page: 46 / 133

Citiz service manual
46
R E P A I R S
Screw connections
Do not overtighten screws. Plastic threads and inserts are delicate.
Observe max. torque for the screw connections according to the following table.
Designation of spare parts
The components in the following illustrations are indexed with position numbers.
See separate spare parts list for corresponding spare part numbers.
Distinguish between spare parts of the different models and core unit
versions.
Electrostatic discharge protection
When installing a new electronic control board, the service technician must be earthed
with a grounding band.
Wiring arrangement
Random changes in the wiring arrangement during a repair can cause
-
electromagnetic interferences,
- squeezed wires,
- insulation defects due to contact with hot parts,
- insulation problems if low and high voltage wires are not separated.
Protective measures:
•
Do not change the course of internal wiring during repair.
• Make sure that wires are distant from hot parts - use existing cable ducts and clips.
Residual water
• If it is necessary to pull off hoses from components, hold ready a small beaker and
a towel to collect and wipe away leaking water.
• A special procedure is necessary to empty the fluid system of the coffee machine for
repair or shipment (refer to "Empty water system" on page 34).
Screw / screw connection Torque Position
NTC fixation on thermoblock
80-100 Ncm
0.8-1.0 Nm
TX 20 screw (2 x) /
thermo fuse fixations on ther-
moblock
150 (+30/-0) Ncm
1.5 (+0.3/-0) Nm