Kenwood HM-437WM, Руководство по обслуживанию

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RXD-M47WM/LS-M47WM
10
ADJUSTMENT
FM Alignment:
Figure 6. FM Band Frequency Coverage Alignment
Connect FM S/G to ANT inputs (mod 1 kHz 22.5kHz dev.)
Step S/G Frequency Dial Setting Indicator Adjust Remarks
1 87.5 MHz Low end Connect DC voltage
meter to test point Vt
and ground L203 Adjust until Vt equal to:
2.5
±
0.05V
2 108 MHz High end Same as step 1 Confirm Vt: 7-9V
3 90.1 MHz 90.1 MHz Connect oscilloscope
or VT/VM to speaker
jack L204 Adjust until Maximum
output
4 106.1 MHz 106.1 MHz Same as step 3 VC202 Adjust until maximum
output
5 Repeat steps 3 and 4 to minimize tracking error.
FM GENERATOR
DUMMY
ANTENNA
TP1
TEST UNIT
OSCILLOSCOPE
DUMMY LOAD
VTVM
R-OUT
L-OUT
GND
Figure 7. FM Band/Tracking
GROUND METER
Vt DC
TEST UNIT