JRC JMR-92 Series Field Service Manual page 627

Step 3 Change the operation circuit A: CCK-1050.
Remove the screws (M3: 12 locations) that fasten the CCK-1050. Float it from rear case by
hooking its edge. Pull out the W67 from the J617, and then change it.
CCK-1050
※Reverse Side
After replacing the CCK-1050, assemble to the original condition by repeating the same
procedure in the reverse order. Please make sure to tighten all the screws and connect all the
cables back in place.
When closing the front panel, be sure not to catch the cables in between.
Step 4 Check operation.
After the replacement of the operation circuit A 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 A.
Chapter 4 Replacement procedure
J615
J631
4-406
J617
※Reverse Side
Ferrite Core
W67