JRC JMR-92 Series Field Service Manual page 723

[Required Tools]
The tools shown in the following table are required for replacement work.
No. Name
1 Flat head
screwdriver
2 Phillips screwdriver
3 Phillips stubby
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.
Step 1 Remove the JB from the display unit mount kit.
Remove the JB from the display unit mount kit. For more information about the JB removal
procedure, refer to "4.3.8.1 Replacing the 26 Inch Sensor LAN Switch Unit: NQA-2443."
Step 2 Set "Bat-Select" of the UPS controller QUINT-DC-UPS/24DC/20 at
"Service."
Set the "Bat-Select" rotary switch of the UPS controller at "Service." For more information, refer
to "4.3.9.1 Replacing the USP Input Filter: ME-NAX-NEF/QUINT20."
Step 3 Remove the blade fuse of the UPS battery QUINT-BAT/24DC/3.4AH.
Remove the fuse of the UPS battery. After removing the fuse, leave it for at least 5 min until the
electricity charged in the internal capacitor is discharged. For more information, refer to "4.3.9.1
Replacing the USP Input Filter: ME-NAX-NEF/QUINT20."
Step 4 Remove the Relay terminal block: CQD-2312
Disconnect all cables / wires from Relay terminal block by using a 3 mm width flat head
screwdriver. Then, dismount the Relay terminal block from the DIN rail. For the details of
dismounting, refer to the " Replacing the Relay Terminal Block: CQD-2312".
AC and DC power supplies have been connected to the Relay terminal block. Before
replacement work, be sure to turn OFF the applicable power circuit breaker.
Not following this instruction will cause electric shock and/or malfunction.
Chapter 4 Replacement procedure
Table Required Tools
Size
2 mm, 4 mm, 6 mm
Size #2
Size #2
4-502
Appearance