Brother P-touch PT-210E, Руководство по обслуживанию

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P-touch
Electronics
SERVICE MANUAL
III - 6
3.2.8 Oscillation Circuit
Fig. 3.2-14 shows the oscillation circuit.
This circuit contains an oscillator and generates an oscillation at 20 MHz which act as
the CPU basic clock. The CPU divides this into half (10 MHz) to synchronize its
internal operations.
Fig. 3.2-14 Oscillation Circuit
3.2.9 Reset Circuit
Fig. 3.2-15 shows the reset circuit. If the +5BV drops abnormally, this circuit prevents
the CPU from operating erroneously.
Fig. 3.2-15 Reset Circuit