THOMSON VP2750 Technical Manual page 51

FUNCTION CONTROL MOTOR
The function control motor performs the following functions:
- Cassette loading and ejection,
- Tape loading and unloading,
- Positioning of the mechanism parts.
CASSETTE LOADING
Cassette insertion leads to the following actions:
- Closure of ST001 (cassette microcontactor),
- Pin 7 of IT001 goes to 0,
- Function control motor rotates forwards.
Pins 52 and/or 50 of IT001 indicate when cassette loading is complete.
TAPE LOADING AND POSITIONING OF MECHANISM PARTS
Signals CAM A, B, and C tell IT001 the position of the mechanism, and make servo control of
the function control motor possible.
CAM C
CAM B
CAM A
EJECTION
MECHANICAL FUNCTION TIMING DIAGRAM
5V
5V
5V
0
CHARG.
DECHARG.
BANDE
AV. RAP.
RET. RAP.
BREF
LECTURE
ENREG.
A/ I - RAL. AV.
RECH. AV.
RECH.ARR.
RAL. ARR.
0
0
AV. RAP.
RET. RAP.
STOP 2
après 5 minutes
de stop 1
STOP 1
47