Waveform With Oscilloscope - Star Micronics NX-1020 Technical Manual

10. Waveform with Oscilloscope

(1) Crystal (10 MHz)
Crystal Pin 30 of IC8
Time/Div : 0.2 µs
Volt/Div : 1V
(3) Protection Circuit
Upper : RESET Pin 5 of IC3
Lower : WD OUT Pin 59 of IC8
Time/Div : 5 ms
Volt/Div : Upper 2V
Lower 1V
(5) Print Head Control Signal and Waveform
Upper : HD1 Data Pin 58 of IC1
Lower : HD1 Pin 1 of CN8
Time/Div : 0.2 ms
Volt/Div : Upper 5V
Lower 20V
(2) RESET (Power on reset)
Upper : RESET input Pin 4 of IC3
Lower : RESET output Pin 5 of IC3
Time/Div : 10 ms
Volt/Div
(4) Head Energizing Control Signal
Upper : HD-EN
Lower : HD1 Data
Time/Div : 0.1 ms
Volt/Div
(6) Carriage Motor Common Control Signal and
Diving Signal
Upper : CR-CMN Control Signal
Lower : CR-CMN Driving Signal
Time/Div : 0.5 ms
Volt/Div
– 111 –
: 2V
Pin 20 of IC1
Pin 58 of IC1
: 2V
Pin 21 of IC8
Pin 3 of CN6
: Upper 5V
Lower 20V