Waveform With Oscilloscope - Star Micronics LC-8211 Technical Manual

7.

Waveform with Oscilloscope

(1) Crystal (12 MHz)
Crystal Pin 34 of IC2
Time/Div : 0.2 s
Volt/Div : 1V
(3) Protection Circuit
Upper : RESET Pin 3 of IC9
Lower : Drive Collector of TR9
Time/Div : 5 ms
Volt/Div : Upper 2V
Lower 2V
(5) Print Head Control Signal and Waveform
Upper : HD1 Data Pin 119 of IC1
Lower : HD1 Pin 2 of JP2A
Time/Div : 0.1 ms
Volt/Div : Upper 5V
Lower 10V
(2) RESET (Power on reset)
Upper : RESET input Pin 1 of IC9
Lower : RESET output Pin 3 of IC9
Time/Div : 10 ms
Volt/Div
(4) Head Energizing Control Signal
Upper : HDEN
Lower : HD1 Data
Time/Div : 50 s
Volt/Div
(6) Carriage Motor Control Signal and Driving Signal
Upper : Carriage-ø1 Control Signal Pin 117 of IC1
Lower : Carriage-ø1 Driving Signal Pin 3 of CN5
Time/Div : 2 ms
Volt/Div
– 103 –
: 2V
Pin 27 of IC1
Pin 119 of IC1
: Upper 1V
Lower 2V
: Upper 5V
Lower 20V