The CPU board is provided with seven test points that can be used
to check various signals or voltages using an oscilloscope or a volt-
age meter.
ADS Address strobe. Controls address latches.
NHOLD Hold request from DMA active low.
VEE Battery voltage. Min. 3.0V at power up. Nominal 3.6V.
/RESET Reset, active low during power up. High at normal operation.
P24 Printhead voltage +24V ±1V during print cycle and cutter operation.
+40V Stepper motor voltage +40V ±2V.
V24 24V ±1V, generates P24 and +40V.
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