Sony UP-21MD Service Manual page 63

3. DC moior drive circuit
Motor drive circuit IC203 on the MEC-15 board is controlled by the control signals at pins 55 and 56 of
1C302 on the SY-299 board. DC motor drives the feed paper roller, head up/down and ribbon rewinding
respectively by each mechanism positions.
Se 8 6 Sc SS 6 A NY GS AY 7 SY 6 7 ¢ 3? 8 |
To SY-299
IC302
55,56pin
8 SN | A SS Sf AR 1S RD Ss 4 3
UP-21MD V1
4-25