JRC JMR-92 Series Field Service Manual page 713

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.
Step 5 Remove the two metal planks.
Remove the screws (M5: total of 4 locations) that fasten the two top and bottom metal planks
and take out both of them. For more information, refer to "4.3.8.1 Replacing the 26 Inch Sensor
LAN Switch Unit: NQA-2443
Step 6 Remove the power wiring of the UPS.
Disconnect the power connector of the UPS. The power connector of the UPS can be removed
using the principle of leverage, by inserting a 2 mm width flat head screwdriver into the groove at
the root of the terminal block in the upper part of the input filter ME-NAX-NEF/QUINT20. For more
information, refer to "4.3.9.1 Replacing the USP Input Filter: ME-NAX-NEF/QUINT20."
An AC power supply has been connected to the UPS. Before starting replacement work, turn
OFF the circuit breaker of the AC power supply.
Chapter 4 Replacement procedure
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