– 138 –
7. Waveform with Oscilloscope
(1) Crystal (10 MHz) (2) RESET (Power on reset)
Crystal Pin 33 of IC1 Upper : RESET input Pin 4 of IC6
Time/Div : 0.2 µs Lower : RESET output Pin 5 of IC6
Volt/Div : 1V Time/Div : 10 ms
Volt/Div : 2V
(3) Protection Circuit (4) Head Energizing Control Signal
Upper : RESET Pin 5 of IC6 Upper : HD-EN Pin 57 of IC4
Lower : WD OUT Pin 59 of IC1 Lower : HD1 Data Pin 40 of IC4
Time/Div : 5 ms Time/Div : 0.1 ms
Volt/Div : Upper 2V Volt/Div : 2V
Lower 1V
(5) Print Head Control Signal and Waveform (6) Carriage Motor Common Control Signal and
Diving Signal
Upper : HD1 Dara Pin 40 of IC4 Upper : CR-CMN Control Signal Pin 21 of IC1
Lower : HD1 Pin 1 of CN8 Lower : CR-CMN Driving Signal Pin 3 of CN6
Time/Div : 0.5 ms Time/Div : 0.5 ms
Volt/Div : Upper 5V Volt/Div : Upper 2V
Lower 20V Lower 20V
To Next Page
Loading...
