Epson LQ-300 + Service Manual page 42

EPSON LQ-300+
Color ribbon drive circuit
CS motor
CS lever assembly
CS cam
Figure 2-4. Color Ribbon Driving Mechanism
Operating Principles
Ribbon detector
CS cam
CS lever assembly
Color ribbon
Black
Cyan
Magenta
Yellow
Color cartridge holder
CS motor, pinion
RIBBON CARTRIDGE DETECTOR
Ribbon detector detects if the color ribbon is installed or not.
Detect Timing
When the power is applied.
When recovering from the economy mode.
When the printing is started.
Table 2-7. Ribbon Detector Specifications
Item
Method
Switching rate
Switching mode
AVOID COLOR FROM MIXING
To avoid the color area on the ribbon from mixing up each other or minimize the color
mixing up, the printing is done by the following order when printing green, violet and
orange.
Color
Green
Orange
Violet
Printer Mechanism
Specification
Mechanical contact method
0.6 to 1.0 mA
• Color ribbon cartridge is installed: High
• Black ribbon cartridge is installed or
ribbon is not installed: Low
Table 2-8. Color Printing Order
First color Second color
Yellow
Yellow
Magenta
Revision C
Cyan
Magenta
Cyan
37