Ribbon Motor/Ribbon Sensor; Print Head - Toshiba B-SA4TM Maintenance Manual

3.MAIN UNIT REPLACEMENT
11. Replace the MAIN PC board with a new one, and reassemble in the reverse order of removal.
CN19
Parallel I/F
CN501
AUD/RTC
(Not used)
CN18
USB I/F
CN17
LAN I/F
CN11 External I/O (Not used)
CN13
Panel PCB
CN12 SIO PC Board
CN500 Stepping Motor
3- 5
CN9
Print Head, Signal
CN8 Power Supply
CN10 Fan
EO18-33016A
3.2 MAIN PC Board Ass'y
CN6
Serial Interface
CN4
Expansion I/O PCB
CN5
Sensors
CN3
Option
CN2
Ribbon Motor
CN1
Print Head, Power