Japan Radio Co. JLN-740A, Instruction Manual

Page: 152 / 232

Chapter 10 Maintenance and Inspection 10-2
10.2 Countermeasures for Abnormalities
and Faults
When any of the following symptoms is detected, contact the store, nearest JRC agent, JRC marine
service department, sales department, regional office, branch or sales office.
• The screen is blank or the power is not supplied to the equipment even if the power supply button is
pressed.
• Smoke, abnormal odor, or abnormal high temperature is detected.
In this case, turn off the power supply and breaker immediately.
The contact method can be found in back spine cover of this manual.
10.3 Repair unit
Repair units and their models are shown below.
Model Name No. Name Model Remarks
NQA-7040
1 Terminal board CQD7040
2 Power supply unit UZP-150-24-J0E3-K
NJC-70S
1 Processor circuit CDC7400
2 TX/RX circuit CMN7400
3 I/F circuit CDF7400
4 Power circuit CBD7400
5 Power supply unit UZP-150-48-J0E