Toshiba V Series User Manual page 95

Table 6-1 specifies the service life of some typical components of the L3 controller.
Deteriorating
No. Part name
part
1 Lithium Discharge
battery
2 Aluminum Capacitance
electrolytic
capacitor
3 Fuse Element
4 Electric Capacitance
double-
layer
capacitor
5 Photo Device
coupler
*1. Battery life is influenced by the environmental conditions (humidity in particular).
Battery consumption varies depending on the length of time for which power is not applied to the
main unit. The battery life specified above takes account of this variation.
6F8C0882
Table 6-1 Service Life
Model
Symptom Nominal life
name
Consumed PS791/
5 years (25
PS791S
Dried up PS791/
10 years (35
PS791S
Melted L3PU11/ 10 years
L3PU21/
EN711/
EN721/
EN731/
EN741
Dried up L3PU11/
10 years (35
L3PU21/
EN711/
EN721/
EN731/
EN741
Reduced L3PU11/ 20 years
light L3PU21/
emission EN711/
EN721/
EN731/
EN741
Recommended
Maintenance
replacement
method
cycle
*1 Periodical *1
o
C) 2 years
replacement
o C) Periodical 10 years
inspection
Periodical 10 years
replacement
o C) Periodical 10 years
inspection
Periodical 10 years
inspection
6.2 Periodical Inspection
Recommended
measure
Replace
battery.
Overhaul
capacitor and
replace parts.
Replace fuse.
Overhaul
capacitor and
replace parts.
Overhaul
capacitor and
replace parts.
81
6