Troubleshooting; Troubleshooting Procedure; Malfunctions - Brother MP-21C Service Manual

2.

TROUBLESHOOTING

2.1

Troubleshooting procedure

2.1.1

Malfunctions

When carrying out the countermeasures for malfunctions described in this section, check
connectors for contact failure before measuring the voltage at specified connector pins.
(1) No DC power supplied from PCMCIA
No AC power supplied from the AC adapter
Possible cause Step
Supply voltage
Power plug
Wiring
Check
1 Is the correct voltage
present at the outlet?
Is the PC card cable
connected securely?
2 Is the AC adapter power
cord securely plugged into
the outlet?
Is the Printer interface card
securely inserted into the
PCMCA card slot on the
PC.
3 Unplug the power supply
plug.
Is there a broken wire
between the AC input
connector of the power
supply and the power plug?
Result
NO
NO
NO
NO
YES
IV-3
Remedy
Inform the user that the
correct voltage is not
supplied at the outlet.
Connect the cable securely.
Plug the power cord
securely into the outlet.
Install the Printer interface
card securely.
Replace the AC adapter.