EM-2115 4.0 SERVICE, MAINTENANCE, CALIBRATION
(EM2115S4-7)
2)
P3B from A15A1J3B (Power Supply Filter Board A15A1).
d.
The Power Supply Assembly is now free for removal.
e.
To install the Power Supply Module, reverse the above procedure.
4.3 Preliminary
The calibration and alignment procedures are normally used to recalibrate-align the EM-
2115 after repair-replacement work is performed or when the performance test procedures of
Section III indicate that the receiver operation is outside specification limits.
4.3.1 Work Conditions
The following work conditions are in effect during the calibration and alignment proce-
dures of Section 4.4.
a.
The top and bottom covers are removed from the receiver.
b.
The receiver is operated from a 120 VAC, 50-60 Hz power source.
NOTE:
For users outside the continental USA, the procedures in
this manual can be performed using 220 VAC 50-60 Hz
with no changes in performance or specification limits.
c.
Unless otherwise indicated, all DC voltage measurements are taken with respect
to ground.
d.
Disconnect instructions are not included.
e.
Power turn off instructions are not included.
4.3.2 Control Settings
For each procedure, set the listed front panel controls for the settings indicated. The fol-
lowing front panel controls will remain at the settings indicated throughout the calibration and
alignment procedures in Section 4.4 unless otherwise noted.
AFC ................................................................OFF
FINE TUNE Control ......................................Mechanical center
SCAN MODE ................................................MANUAL
AUDIO LEVEL Control ................................FULL CCW
THRESHOLD CONTROL ............................FULL CCW
4.4 Calibration/Alignment Procedures
4.4.1 Power Supply Verification
Содержание EM-2115
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