JRC JMR-92 Series Field Service Manual page 634

Step 4 Change the operation circuit CN: CCK-1070.
Remove the screws (M3: 4 locations) that fasten the CCK-1070. After replacing it, assemble to
the original condition by repeating the same procedure in the reverse order. Fit the guide holes of
CCK-1070 into the guide poles on the rear case.Please make sure to tighten all the screws and
connect all the cables back in place.
Check PCB Guide
When closing the front panel, be sure not to catch the cables in between.
Step 5 Check operation.
After the replacement of the operation circuit CN is completed, turn ON the circuit breaker for
the power supply of the display unit and check the operation as follows.
(1) By referring to "7.2.3 Checking the Operation of the Operation Unit [Key Test]," check
that all the buttons and knobs of the TOPU respond normally.
(2) By referring to "7.2.4 Checking Alert Sound [Sound Test]," check the alert sound volume.
(3) By referring to "7.2.5 Testing LED Brightness [Light Test]," check the brightness of the
LEDs.
(4) By referring to "7.2.6 Testing the Motor [Motor Test]," check the operation of the motor.
This completes the replacement of the operation circuit CN.
CCK-1070
4-413 Chapter 4 Replacement procedure