Citizen CLP-621 Technical Manual page 96

3-5. Disassembly, Reassembly and Lubrication
3-5-15. Sensor U Unit
1. Remove the Mechanism Unit. Refer to 3-5-13 "Mechanism Unit and Case L".
2. Open the Head Block and detach the Sensor U Unit to set it free.
3. Remove 4 screws (PH, M2x4), and detach the Sensor U Unit.
(Head Block)
Notes on reassembling:
• When assembling the Sensor U Unit, be sure that the protrusions "A" and "B" are securely
engaged with the respective holes as shown in the figure.
• When assembling the Sensor U Unit, be sure that the cable length "C" is approx. 2.5 cm (1") with
the Head Block fully rose. If it is too long, the cable will be caught when the Head Block is
closed.
CLP-621 & CLP-631
C
C: Approx. 2.5 cm (1")
(When the Head Block is fully raised.)
PH, M2x4
B
A
3-24
Unit, Sensor U