Oki IP-6620 Maintenance Manual page 328

5.9 About the PCB-ASSY-IPB5-100 Board
5.9.1 Lithium battery problem
<Symptom>
Date and time function does not operate properly even after configuring the time zone setting.
<Faulty part>
PCB-ASSY-IPB5-100
<Action>
Replace the PCB-ASSY-IPB5-100.
Notes
 Do not replace only the lithium battery, as it may cause an explosion if a different battery type is
installed.
 Dispose of the lithium battery according to the local regulations.
Caution
Risk of explosion if battery is replaced by an incorrect tipe.
Dispose of used batteries according to the instructions.
OKI Data Infotech Corporation CONFIDENTIAL
Chapter 5 Troubleshooting (Engine Section and USB Controller Section)
5-169