JRC JMR-5410-6XH - Failures and After-Sale Services; Failure Detection; About Alerts; Alert Description

16-1 Section 16 Failures and After-Sale Services
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Section 16 Failures and After-Sale
Services
16.1 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.
16.1.1 About alerts
Failures can be detected from alerts.
For details on alerts, please refer to "Appendix B, Alert List."
16.1.2 Alert description
For a description of alerts to be displayed, please refer to "Appendix B, Alert List."
16.1.3 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.
List of Fuses Used
Placement Location
Part No.
Rated current
Protection circuit
Model name
Radar processing unit
(JMR-5410-4X/6X/6XH)
F2 5A
Input/output circuit
(CMH-2452)
PC4401
ST4-5AN1
F3 10A ST6-10AN1
Radar processing unit
(JMR-5425-7X/9X/6XH,
JMR-5430-S, JMR-5472-S,
JMR-5482-S/SH)
F2 10A
Input/output circuit
(CMH-2452)
PC4401
ST6-10AN1
F3 10A ST6-10AN1