19-33  Section 19    Maintenance & Inspection 
 
 
 
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19.5  Replacement of Major Parts 
The system includes parts that need periodic replacement. The parts should be replaced as scheduled. 
Use of parts over their service life can cause a system failure. 
 
 
 
Turn off the main power source before inspecting and replacing parts. 
Otherwise, an electric shock or trouble may be caused. 
 
The liquid crystal monitor shall be replaced by two more persons. If only 
one person does this work, he may drop the LCD, resulting in injury. 
 
 
19.5.1  Parts expected for periodic replacement 
Here are parts expected for periodic replacement. 
 
Part type  Name  Part name  Life expectancy 
Replacement 
kit type 
NWZ-207  19inch monitor  FAN  40,000 hours    7ZYNA4004 
NWZ-214  19inch monitor  FAN  60,000 hours  7BFRD0008 
NWZ-208  26inch monitor  FAN  40,000 hours  7ZYNA4005 
NBD-913 Power supply 
unit 
FAN 100,000 hours  7ZYNA4007 
QUINT-BAT/
24DC/3.4AH 
DC UPS  Battery  30,000 hours  QUINT-BAT/
24DC/3.4AH 
NDC-1590/A Central control 
unit 
FAN 40,000 hours  7ZYNA4006 
 
Memo 
[UPS] is required only when it is installed as an option.