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2.3 Components and General Operation
Original version (Control PCB:Artwork No. 999-32300)
The control PCB includes the CPU (IC201), the gate array (IC202), the EP ROM (IC203)
programmed with the data necessary for typewriter operation, the SRAM (IC205) that holds the
store data, and their peripheral devices. If the unit is equipped with the spelling checker function,
the control PCB is also equipped with a ROM (IC204).
When the power is turned on and the initial operations are completed, the CPU (IC201) begins key
scanning the keyboard through the gate array (IC202). If key input is deemed to have been made,
the CPU (IC201) reads the data concerning the printing impression for that key, the step angle for
the motor, etc., from ROM (IC203). The excitation phasing of the selection motor, carrier motor,
ribbon motor and LF motor is controlled by this data, and the hammer solenoid is turned on.
Block diagram
2-3
Summary of Contents for Carrera De Luxe MD
Page 14: ...3 2 Keyboard Keyboard layout Keyboard contact layout membrane sheet 3 3 ...
Page 15: ...Keyboard contact diagram keyboard matrix 3 4 ...
Page 19: ...3 5 LCD LCD layout Epson ECM A0697 type JIC MSBZ9129 type 3 8 ...
Page 20: ...LCD block diagram Epson ECM A0697 type JIC MSBZ9129 type 3 9 ...
Page 21: ...3 6 Control PCB Control PCB layout Original version Control PCB Artwork No 999 32300 3 10 ...
Page 22: ...2nd version Control PCB Artwork No 999 35810 3 11 ...
Page 23: ...3 12 Control PCB diagram Original version Control PCB Artwork No 999 32300 ...
Page 24: ...2nd version Control PCB Artwork No 999 35810 Page 1 3 3 13 ...
Page 25: ...2nd version Control PCB Artwork No 999 35810 Page 2 3 3 14 ...
Page 26: ...3 15 2nd version Control PCB Artwork No 999 35810 Page 3 3 ...
Page 30: ...4 4 ...
Page 37: ...Correction tape Ribbon tape 4 11 ...
Page 42: ...5 3 ...
Page 45: ...5 6 ...
Page 47: ...Original version Control PCB Artwork No 999 32300 5 8 ...
Page 48: ...2nd version Control PCB Artwork No 999 35810 5 9 ...
Page 52: ...5 13 ...
Page 55: ...5 16 ...
Page 58: ...5 19 ...
Page 61: ...5 22 ...
Page 63: ...5 24 ...
Page 68: ...Chassis frame and platen 6 2 ...
Page 69: ...Carrier drive Hammer solenoid 6 3 ...
Page 76: ...Printed in Japan 001 03139 03 090616 FN AX160VF OP ...