JRC JMA-5212-4, Service Manual

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(3) After long range transmission for about 15 minutes, open the service engineer
menu again and perform tuning adjustment.
In the service engineer menu, perform adjustment for the tune indicator bar on the
display to reach 80%.
In the service engineer menu, also confirm that the magnetron current indicator
shows 50 to 70%.
4.1.15. Motor Replacement for the NKE-2103
[Required tools]
•
A Phillips screwdriver for 4 mm screws
•
A Phillips screwdriver for 5 mm screws
•
A single-ended wrench (width across flats 10 mm for M6 bolts)
• Tools for removing the scanner unit covers (See Section 4.1.2)
[Replacement procedure]
(1) Open the top cover (see Section 4.1.2),
and remove the transmitter-receiver unit
(see Section 4.1.6).
(2) Remove the four hexagon bolts (M6),
and remove the motor. Apply grease to
the gear of the new motor, and install the
motor in the chassis. Be sure to tighten all
the four hexagon bolts with specified
torque (72 kgf
˜
cm).
(3) After the motor replacement, carry out the work in reverse order of removal.
Be sure to tighten all the bolts and screws and connect all the cables.
The rotor of the motor rotates, so clamp the cables not to touch the rotor.
Remove the four
bolts.