|
|
|
Who's Online
There currently are 5878 guests online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
It was magic after so many years to still be able to source this info. It was equally amazing to return my Pioneer receiver to it near new sound quality AFTER NEARLY 30 YEARS! Thank you for this ability!
;
Very quick and easy website to use and fast download of manual, quality of manual is excellent and will be pleased to use this service again in the future, thanks so much!
 ;
Easy and secure way to get a complete service manual of a vintage hifi component. Only some parts of the print copy are dificult to read. Nice price!
;
The manual is an excellent reproduction with complete schematics, made troubleshooting and repair a simple process.
;
Up to now you are the BEST! Prompt-efficient and so reasonable ! I have been after SONY service manual for quite some time !Thank you very much ! I can recomend your service to
all my collegagues ! V.Bergfield .
THEORY OF OPERATION
2-2-5. Carriage Motor Speed Control Since the carriage motor is a stepping motor, the carriage can be stopped at a desired position by controlling acceleration and deceleration. The carriage can also move backward. The rotational speed of the carriage motor is set by the number of pulses per time unit. The character pitch (horizontal character size) in each print mode is determined by changing this rotational speed (or carriage transfer speed). (1) At start-up of the motor: The number of pulses input to the motor increase in steps, reaching a certain frequency. (2) To stop the motor: The number of pulses input to the motor decreases in steps, in order to gradually bring the motor to a halt. (3) When printing is carried out: Pulses of a uniform pulse width are supplied for printing. 2-2-6. Paper Feed Motor Driving Circuit Again, a stepping motor is employed as the paper feed motor, which turns a certain angle only when a drive pulse is received. This 4-phase stepping motor is controlled by the phase 1-2 excitation method. The following shows the paper feed motor drive circuit and the control signal generated by the phase 1-2 excitation method.
Fig. 2-12 Paper Feed Motor Driving Circuit
� 21 �
|
|
|
> |
|
