Brother PT-D600 Service Manual page 158

The tape cassette type
cannot be identified correctly.
Does each sensor
actuator on the side sensor
PCB work normally?
Y
Are the
side sensor leads
soldered correctly?
Y
Does each switch on the
color sensor work normally?
Y
Is the color sensor
connector connected correctly?
Y
Replace the main PCB.
N
The side sensor PCB is
defective. Replace it.
N
Correct them with
lead-free solder.
N
Replace the color sensor.
N
Reconnect the color sensor
connector correctly.
IV - 85