Brother International HS-5300 Service Manual - Page 137

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(3) The PA motor does not rotate. Possible cause Connection failure of connector PA motor Driver circuit Step 1 2 Check Is the connection of connector P4 on the driver PCB correct? Disconnect connector P4 from the driver PCB. Measure the resistance between the connector pins of the PA motor by using a circuit tester. Do the measured resistances satisfy the prescribed value in the table below? Result NO NO YES Remedy Reconnect the connector. Replace the PA motor. Replace the driver PCB. Replace the Main PCB. P4-3 and P4-2 P4-3 and P4-5 P4-4 and P4-1 P4-4 and P4-6 Approx. 3 c (4) The carriage motor does not rotate. Possible cause Connection failure of connector P2. Step , Check 1 Are the connectors P2 and P3 on the driver PCB securely connected? , Result Remedy NO Connect them securely. Connection failure of connector P3. Carriage motor 2 Disconnect the connector P2 NO Replace the carriage from the driver PCB. motor. Driver circuit Measure the resistance between YES Replace the driver the connector pins of the PCB. carriage motor with a circuit Replace the Main tester. PCB. Does the measured resistance satisfy the value in the table below? P2-1 and P2-2 Approx.10 Q IV-3

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(3)
The
PA
motor
does
not
rotate.
Possible
cause
Step
Check
Result
Remedy
Connection
failure
of
connector
1
Is
the
connection
of
connector
P4
on
the
driver
PCB
correct?
NO
Reconnect
the
connector.
PA
motor
2
Disconnect
connector
P4
from
the
driver
PCB.
Measure
the
resistance
between
the
connector
pins
of
the
PA
motor
by
using
a
circuit
tester.
Do
the
measured
resistances
satisfy
the
prescribed
value
in
the
table
below?
NO
Replace
the
PA
motor.
Driver
circuit
YES
Replace
the
driver
PCB.
Replace
the
Main
PCB.
P4-3
and
P4-2
P4-3
and
P4-5
P4-4
and
P4-1
P4-4
and
P4-6
Approx.
3
c
(4)
The
carriage
motor
does
not
rotate.
Possible
cause
Step
,
Check
,
Result
Remedy
Connection
failure
of
connector
P2.
Connection
failure
of
connector
P3.
1
Are
the
connectors
P2
and
P3
on
the
driver
PCB
securely
connected?
NO
Connect
them
securely.
Carriage
motor
2
Disconnect
the
connector
P2
from
the
driver
PCB.
Measure
the
resistance
between
the
connector
pins
of
the
carriage
motor
with
a
circuit
tester.
Does
the
measured
resistance
satisfy
the
value
in
the
table
below?
NO
Replace
the
carriage
motor.
Driver
circuit
YES
Replace
the
driver
PCB.
Replace
the
Main
PCB.
P2-1
and
P2-2
Approx.10
Q
IV
-3