Sony TC-C5 - Page 11

TC-C5/C521
2. DRUM ROTATION
Drum is driven by the drum motor. As shown in Fig. 2, the
drum motor rotates the pulley and rotary gear via belt to
rotate the drum.
DETECTION OF CASSETTE HOLDER POSITION
The D891 on the drum pulse board detects the cassette hol-
der position by detecting a slit in the bottom of drum.
Holder rotation stop position is detected at the position
shown with arrow in Fig. 3, and holder number is detected
at @ position.
The D892 on the drum CLK board detects the drum motor
rotation pulses to control the slit detection by D891.
Thus, the motor control is executed by double detections.
rotary gear D891
/ drum pulse board
rotary
pulley.
x
ewe
¥
a
\
Op
belt P
| D892
drum CLK board
er
drum motor
drum
Fig. 2