Waveform With Oscilloscope - Star Micronics LC-7211 Technical Manual

7.

Waveform with Oscilloscope

(1) Crystal (12 MHz)
Crystal Pin 34 of IC1
Time/Div : 0.2 µs
Volt/Div : 1V
(3) Protection Circuit
Upper : RESET Pin 3 of IC8
Lower : Drive Collector of TR13
Time/Div : 5 ms
Volt/Div : Upper 2V
Lower 2V
(5) Print Head Control Signal and Waveform
Upper : HD1 Data Pin 47 of IC6
Lower : HD1 Pin 5 of JP2
Time/Div : 0.1 ms
Volt/Div : Upper 5V
Lower 10V
(2V)
(0V)
(4V)
(0V)
(4V)
(0V)
(5V)
(0V)
(40V)
(20V)
(0V)
– 101 –
(2) RESET (Power on reset)
Upper : RESET input Pin 1 of IC8
Lower : RESET output Pin 3 of IC8
Time/Div : 10 ms
Volt/Div : 2V
(4) Head Energizing Control Signal
Upper : HDEN Pin 57 of IC6
Lower : HD1 Data Pin 47 of IC6
Time/Div : 50µs
Volt/Div : Upper 2V
Lower 2V
(6) Carriage Motor Control Signal and Driving Signal
Upper : Carriage-ø1 Control Signal Pin 38 of IC6
Lower : Carriage-ø1 Driving Signal Pin 3 of CN5
Time/Div : 1 ms
Volt/Div : Upper 5V
Lower 20V
(4V)
(0V)
(4V)
(0V)
(4V)
(0V)
(4V)
(0V)
(5V)
(0V)
(80V)
(40V)
(0V)