JRC JMR-92 Series Field Service Manual page 661

4.3.8.4 Replacing the Analog Option Circuit: AOC CMJ-560
[Required Tools]
The tools shown in the following table are required for replacement work.
No. Name
1 Flat head
screwdriver
2 Phillips screwdriver
Before conducting replacement work, turn OFF the circuit breaker for the power supply of the
display unit.
Do not lose the screws as they will be needed again.
The power to the AOC is supplied from the SLC. A DC power supply has fed to SLC.
Before replacement work, be sure to turn OFF the DC power circuit breaker.
Step 1 Remove the front cover of the display unit mount kit and the lid of
the JB.
Remove the front cover of the display unit mount kit and the lid of the JB. For more information
about the removal procedure, refer to "Replacing the Fuses of the Serial LAN Interface Circuit:
SLC CMH-2370."
Step 2 Turn OFF the power switch of the SLC and remove the wires
together with the two-piece terminal block.
Turn OFF the power S1 switch of the SLC. Remove the wires of the AOC together with the
two-piece terminal block. The terminal block can be removed by pulling it out.
Chapter 4 Replacement procedure
Table Required Tools
Size
6 mm
Size #2
4-440
Appearance