Waveform With Oscilloscope - Star Micronics LC-1011C Technical Manual

9.

Waveform with Oscilloscope

(1) Crystal (10 MHz)
Crystal (Pin 29 of IC4)
Time/Div : 0.2 s
Volt/Div : 1V
(3) Protection Circuit
Upper : RESET (Pin 3 of IC7)
Lower : WD OUT (Pin 59 of IC1)
Time/Div : 5 ms
Volt/Div : Upper 2V
Lower 1V
(5) Print Head Control Signal and Waveform
Upper : HD1 Data (Pin 60 of IC1)
Lower : HD1 (Pin 1 of CN8)
Time/Div : 0.2 ms
Volt/Div : Upper 5V
Lower 50V
(5V)
(0V)
(50V)
(0V)
(2) RESET (Power on reset)
Upper : RESET input (Pin 1 of IC7)
Lower : RESET output (Pin 3 of IC7)
Time/Div : 10 ms
Volt/Div : 2V
(4) Head Energizing Control Signal
Upper : HD-EN (Pin 39 of IC1)
Lower : HD1 Data (Pin 60 of IC1)
Time/Div : 0.1 ms
Volt/Div : 2V
(6) Carriage Motor Control Signal and Driving Signal
Upper : Carriage-ø1 Control Signal (Pin 48 of IC1)
Lower : Carriage-ø1 Driving Signal (Pin 3 of CN4)
Time/Div : 20 s
Volt/Div : Upper 2V
– 87 –
(5V)
(0V)
(50V)
(0V)
Lower 20V