Chapter 4
Printer Maintenance
Print-Head Cleaning
You may need to clean the
•Open the paper door by pulling the “T” bar lever on the top cover as shown in
“Adding Paper” on page 14. The paper supply door will pop up.
•Remove the paper roll.
•Moisten a cotton swab with isopropyl alcohol and clean the
•Clean the platen roller with a dry cloth or small brush. Make sure the platen roller is clean all the way around.
•Moisten another cotton swab with isopropyl alcohol. Rub the swab across the black mark sensor to remove any
•Moisten another cotton swab and rub the swab across the tear bar to remove any
You may experience dust
Do not use sharp objects to clean the
Charging the Printer Battery
The printer battery is charged using the
•Plug the AC adapter output cable into the AC adapter port as shown in “Charging the Battery” on page 11.
•Plug the AC adapter output cable into the appropriate AC line voltage socket.
•The yellow LED will illuminate indicating that the battery is being charged.
•The battery will be
•To insure a full charge, the printer should not be operating while the battery is charging.
Copyright 2008 Unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of Unitech Electronics Co., Ltd.
26
Important Notes on Charging Batteries
•The MP300 Mobile Printer requires an adapter output of 10V DC/1.32A.
•The battery
•The
•Optional external battery chargers are available for Unitech batteries.
Refer to “Printer Supplies” on page 30.
Important Notes on Replacing Batteries
•Check for the correct Unitech part number for the battery and only order that part for your new battery.
Caution! Risk of explosion if battery is replaced by an incorrect type.
Dispose of used batteries according to instructions on page 28.
Verifying Battery Charge State
Follow the steps below to identify and correct any battery power problem that may be encountered. This will help identify that the fault is with the printer and not some other part of your system.
To Test the AC Adapter:
•Use a multimeter and measure the output voltage. Output should be 10V DC.
•Press the on/off button and wait until all LEDs are off.
•Insert the AC adapter output cable into the printer. If the Amber LED goes on, the battery is not fully charged, but the charge circuit is functioning.
•The AC power portion of the circuit appears ok.
Copyright 2008 Unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of Unitech Electronics Co., Ltd.
27