Brother International MP-21C Service Manual - Page 104

Troubleshooting

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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 Supply voltage Power plug Wiring Step 1 2 3 Check Is the correct voltage present at the outlet? Is the PC card cable connected securely? 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. 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 Remedy Inform the user that the correct voltage is not supplied at the outlet. Connect the cable securely. NO Plug the power cord securely into the outlet. NO Install the Printer interface card securely. YES Replace the AC adapter. IV-3

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IV-3
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
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.
Is the PC card cable
connected securely?
NO
Connect the cable securely.
Power plug
2
Is the AC adapter power
cord securely plugged into
the outlet?
NO
Plug the power cord
securely into the outlet.
Is the Printer interface card
securely inserted into the
PCMCA card slot on the
PC.
NO
Install the Printer interface
card securely.
Wiring
3
Unplug the power supply
plug.
Is there a broken wire
between the AC input
connector of the power
supply and the power plug?
YES
Replace the AC adapter.