Table of Contents
Advertisement
1-5.
Replacing EEPROMs and Backup Battery
1-5-1.
EEPROMs
The following EEPROMs are mounted in this unit.
These EEPROMs retain system setting data, adjustment data, and other data.
These data cannot be set again by replacing only relevant EEPROMs. When an EEPROM needs to be replaced, replace
the board that contains the EEPROM.
• SY-422 board: IC610, IC1510, IC2901 to IC2903
1-5-2.
Replacing Backup Battery
A lithium battery for backup of calendar and clock data is mounted on the SY-422 board.
If the battery runs out, the clock cannot keep accurate time and the calendar function does not work correctly. When
these symptoms occurred, replace the lithium battery.
After the lithium battery has been replaced, turn off and on the power twice. Then, set the calendar and clock time
referring to
"3. MAINTENANCE
WARNING
When replacing the part, be sure to use the specified one below.
Replacement with a part other than the specified part will result in fire hazards and electric hazards.
Part Name: Lithium battery (CR2032)
Part No.:
1-528-174-73
PWS-4500
Menu".
1-27
Advertisement
Table of Contents
