Epson LQ-510 Technical Manual page 41

REV.-A
Figure 2-23.
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Figure 2-61.
Figure 2-62.
LQ-510
Switching Circuit (During PCI Operation) ........................... 2-20
Over-Current Protection (OCP) ..........................................
+ 5 VDC Regulator Circuit ................................................
Oscillator Waveforms .......................................................
Constant Voltage Control .................................................
EAI Output ......................................................................
Over-Current Protection (OCP) ..........................................
lC494 Internal Circuit .......................................................
PWM Output....................................................................
Voltage Limiting Circuit ....................................................
± 12 VDC Supply Circuit .................................................
Vx Voltage Circuit............................................................
Reset Circuit ...................................................................
RESET Output .................................................................
RESET Pulse Oscillation Process (Module Mounted). ......... 2-30
RESET Pulse Oscillation Process (Module Removed) ......... 2-31
INIT Signal Input Circuit ...................................................
Address Decoder .............................................................
Bank Register..................................................................
Carriage Mechanism ........................................................
Carriage Drive Circuit Block Diagram ................................ 2-36
Gate Array Operation .......................................................
Carriage Motor Drive Circuit .............................................
SLA7020M Circuit Diagram ...............................................
Phase Data Input Timing (2-2 Phase) ................................ 2-40
Phase Signal Timing Chart (2-2 Phase) ............................. 2-40
Phase Data Input Circuit (1-2 Phase) ................................. 2-41
Phase Signal Timing Chart (1-2 Phase) ............................. 2-41
Phase Data Conversion Circuit .........................................
Reference Voltage Generation Circuit ............................... 2-43
Constant Current Control Circuit ....................................... 2-44
Waveforms ......................................................................
Carriage Motor Control .....................................................
Home-Position Seek.........................................................
Printing Area and Printing Timing ..................................... 2-50
Friction-Feed Operation ...................................................
Push-Tractor-Feed Operation ............................................
Paper-Feed Motor Drive Circuit .........................................
Paper-Feed Motor Drive Timing Chart ............................... 2-54
Printhead Printing Operation ............................................
PRINCIPLES OF OPERATION
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2-21
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2-23
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2-25
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