6. MALFUNCTIONS; If you analyze malfunctions with the power plug inserted into the power outlet, special; caution should be exercised even if the power switch is OFF because it is a single pole- Page 140

Brother 1240 User Manual

2014 Dodge Charger SRT Owner Manual

Table of Contents

sm_hl12er.pdf
PR99188.pdf
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CHAPTER 6  TROUBLESHOOTING

6-18

6. MALFUNCTIONS

When taking countermeasures for malfunctions as described in this section, check connectors
for contact failure before measuring the voltage at the specified connector pins.

M-1

No AC power supplied

Possible cause

Step

Check

Result

Remedy

Supply voltage

1

Is the correct voltage present
at the outlet?

No

Inform the user that the correct
voltage is not supplied at the
outlet.

Power plug

2

Is the power cord securely
plugged into the outlet?

No

Plug the power cord securely
into the outlet.

Fuse (F1, F2)

3

Is the fuse blown?

Yes

If the fuse blows again
immediately after replacing the
low-voltage power supply PCB,
check that there is not a short
circuit somewhere in the AC
power supply line.

Wiring

4

Unplug the power supply plug.
Is there a broken wire between
the AC input connector of the
low-voltage power supply and
the power plug?

Yes

Replace the AC power cord.

M-2

No DC power supplied

Possible cause

Step

Check

Result

Remedy

AC power
supply

1

Is AC power supplied between
connectors CN1-L and CN1-N
when the power plug is
plugged into the outlet?

No

Follow the same check
procedure of M-1 “No AC
power supplied”.

Wiring, DC load

2

Turn off the power switch and
disconnect the P3 and P5
connectors on the engine PCB.
Turn on the power again.
Measure the voltages between
the terminals.  Do the
measured voltage satisfy the
prescribed valued in the table
below?

Yes

Turn off the power switch,
reconnect the connector and
turn the power switch on again.
If the protector circuit is
activated, check the connector,
the wiring from the connector,
and the DC load.

Low-voltage
power supply
PCB

3

PCB

+ lead pin - lead pin

Voltage

Engine

P5-2

P5-3

Approx. 24V

P3-10

P3-9

Approx. 5V

No

Replace the low-voltage power
supply PCB.

WARNING

If you analyze malfunctions with the power plug inserted into the power outlet, special
caution should be exercised even if the power switch is OFF because it is a single pole
switch.

Detailed Information for Brother 1240 User Manual

Lists of information found in Brother 1240 User Manual - Page 140

  • 6. MALFUNCTIONS When taking countermeasures for malfunctions as described in this section, check connectors for contact failure before measuring the voltage at the specified connector pins.

FAQ (Frequently Asked Questions) for Brother 1240 User Manual - Page 140

  • MALFUNCTIONS When taking countermeasures for malfunctions as described in this section, check connectors for contact failure before measuring the voltage at the specified connector pins. M-1 No AC power supplied Possible cause Step Check Result Remedy Supply voltage 1 Is the correct voltage present at the outlet?
  • No Inform the user that the correct voltage is not supplied at the outlet. Power plug 2 Is the power cord securely plugged into the outlet?
  • No Plug the power cord securely into the outlet. Fuse (F1, F2) 3 Is the fuse blown?
  • Yes If the fuse blows again immediately after replacing the low-voltage power supply PCB, check that there is not a short circuit somewhere in the AC power supply line. Wiring 4 Unplug the power supply plug. Is there a broken wire between the AC input connector of the low-voltage power supply and the power plug?
  • Yes Replace the AC power cord. M-2 No DC power supplied Possible cause Step Check Result Remedy AC power supply 1 Is AC power supplied between connectors CN1-L and CN1-N when the power plug is plugged into the outlet?
  • Do the measured voltage satisfy the prescribed valued in the table below?

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