Section 10 Failures And After-Sale Services; Failure Detection; About Alerts; Alert Description - JRC JAN-7202 Instruction Manual

Section 10

10.1 Failure Detection

Semiconductor circuits can be considered to be almost free from defective semiconductors and/or
performance deterioration except when there are design and inspection errors, or external and human
induced causes. Generally, the causes of comparably frequent failures include line disconnection due
to humidity of the high resistor, failure of the variable resistor as well as contact failures of switches and
relays.
In addition to faulty parts, faulty adjustments (especially faulty tuning) or faulty maintenance (especially
faulty cable contact) occasionally make up causes of failures; thus, it is effective to reinspect or
readjust these items.

10.1.1 About alerts

Failures can be detected from alerts.
For details on alerts, please refer to "Appendix B, Alert List."

10.1.2 Alert description

For a description of alerts to be displayed, please refer to "Appendix B, Alert List."

10.1.3 Fuse inspection

Because there is a specific cause for any fuse meltdown, it is necessary to check the related circuits
even if there is no abnormality after changing a fuse. However, please give consideration that the fuse
meltdown characteristics vary significantly. The following table shows a list of the fuses used in this
unit.
Fuse Name Name of
Model Used
Blade fuse NBD-913
(Auto fuse)
Blade (mini) fuse NQE-1143
(Auto fuse)
Blade (mini) fuse
(Auto fuse)
Glass fuse
Failures and After-Sale
Services
List of Fuses Used
Placement Count
Location
Power 2
supply unit
JB 1
2
4
10-1
Part Spec. Change Kit Model
32VDC 15A part 1015(5ZFCK00008)
32VDC 15A part 1215(5ZFCK00017)
32VDC 3A part 1203(5ZFCK00016)
250V 0.5A part MF51NR 250V
0.5(5ZFGD00019)

Section 10 Failures and After-Sale Services

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