Information On Fault Rectification / Component Replacement; Potentiometer Knob Defective / Stem Slipping; Opening Crr 120 - Bosch CRR 120 Repair Instructions

en 26 | CRR 120 | Information on fault rectification / component replacement
7. Information on fault rec-
tification / component re-
placement
7.1 Potentiometer / potentiometer knob
defective / stem slipping
Fig. 8: CRR 120 potentiometer P1 (P2)
1 Rotary knob
2 Potentiometer stem
3 Locating hole
4 Locating element
1. Use a 1.3 mm Allen key to slacken off the locking
screw at the rotary knob (Fig. 8, Pos. 1).
|
1 689 975 254 2014-01-14
2. Detach the rotary knob.
3. Turn the actual potentiometer stem (Fig. 1, Pos. 2).
i
The potentiometer is of the 10-turn type. There must
be mechanical stops in both directions. With the
CRR 120 switched on, the reading on the display
(Fig. 1, Pos. 2) must change.
Replace the potentiometer knob if necessary.
R
Turn the potentiometer stem counter-clockwise to
the 0 position (stop).
R
Set the new knob to 0.5 and fit it on the stem.
 Play attention to locating elements in front panel
(Fig. 8, Pos. 3 and 4).
R
With the locking screw unfastened, turn to 0.0 and
tighten the locking screw (locking screw is then fac-
ing the underside).
7.2

Opening CRR 120

Fig. 9: Opening CRR 120
Robert Bosch GmbH