82
C motor drive circuit
C motor uses a 4-phase stepper, and it is set in single phase by BBG020 at standby 1/2-
phase at rotation of the motor.
The current value reaching the motor is decided by turning on HCDR0–HCDR4.
Drive Method
Data control signals from the gate array consist of a speed control and phase signals. The
speed control signal is set at a certain voltage level by transistors Q8, Q9, Q10, Q12 and Q11
and resistors R58, R59, R60, R76 and R61, and is supplied to P2. This voltage level determines
how P2 controls the current, which flows to the motor.
LF motor (front) drive circuit
LF motor uses a 4-phase stepping motor, and it is set in single phase by BBG020 at standby
and double phase at rotation of the motor.
Current value, which flows to the motor, is decided by turning on LFDR0-LFDR2.
Содержание Accel-7350
Страница 1: ...1 Accel 7350 Dot Matrix Printer Service Manual Document 130034 ...
Страница 24: ...23 Wiring Diagram ...
Страница 25: ...24 Control Diagram ...
Страница 35: ...34 Dots Missing Caution Do not touch the print head immediately after printing because it may be too hot ...
Страница 36: ...35 Extra Dot Printing Improper character ...
Страница 37: ...36 Incorrect Printing Irregular print data ...
Страница 38: ...37 No LCD Display Half of the LCD lights up ...
Страница 39: ...38 No LCD Display Completely blank ...
Страница 40: ...39 Control Keys Not Functioning ...
Страница 41: ...40 No Buzzer Abnormal Ribbon Feeding Causing abnormal carriage movement ...
Страница 42: ...41 No Line Feed or Inconsistent Line Feeding ...
Страница 43: ...42 Carriage Error ...
Страница 44: ...43 ...
Страница 46: ...45 Cover Open Error Will Not Cancel With Cover Closed ...
Страница 47: ...46 No Fanfold Paper Reverse Line Feed ...
Страница 48: ...47 Printing Does Not Stop After Paper Is Ejected ...
Страница 49: ...48 Not Powering Up ...
Страница 94: ...93 Indicator Circuit ...
Страница 95: ...94 I F Circuit ...
Страница 96: ...95 Slide SW Circuit ...
Страница 97: ...96 Power Circuit ...
Страница 98: ...97 Exploded View 1 6 Following pages require Legal size paper for printing ...
Страница 99: ...98 Exploded View 2 6 ...
Страница 100: ...99 Exploded View 3 6 ...
Страница 101: ...100 Exploded View 4 6 ...
Страница 102: ...101 Exploded View 5 6 ...
Страница 103: ...102 Exploded View 6 6 ...
Страница 119: ...126 ...