Head And Motor Power Supply On/Off Circuit - Brother P-Touch QL-570 Service Manual

2.3.3

Head and Motor Power Supply ON/OFF Circuit

Turning the CPU status of PDL10 (VHON, 81 pin) to High, top cover is closed, and turns cover
open sensor Low, Q10 turns on, V (25V power supply) turns on and consequently the head and
H
motor is energized.
In addition, turning on this circuit, "media position detect sensor circuit", "cutter home position detect
circuit" are energized.
Turning the CPU status of PDL10 (VHON, 81 pin) to Low, Q10 turns off, or keeping the top cover
open, Q2 turns on, then these condition make V (25V power supply) turns off and consequently
H
the head and motor power supply is cut off.
VHON circuit
Fig. 2.3-3 Head and Motor Power Supply ON/OFF Circuit
II- 10