PRESIDENT Mc KINLEY US 12/24, Руководство по обслуживанию, Страница: 5 / 65

ALIGNMENT VCO/PLL
- Alignment procedure (13,8V/27,6V)
STEP CONDITION ADJUSTMENT REMARKS OF ADJUSTMENT
1 AM
RX mode
Channel 20
L 308 Fine + coarse center position
Connect a frequency counter to TP304,
adjust L308 to reach 37,900MHz ± 20Hz
2 USB
RX mode
Channel 20
Fine + coarse center position
Connect a frequency counter to TP304,
And check 37,9025MHz ± 20Hz
3 LSB
RX mode
Channel 20
Fine + coarse center position
Connect a frequency counter to TP304,
And check 37,8975MHz ± 20Hz
4 USB
TX mode
Channel 20
RT302 Fine + coarse center position
Connect a frequency counter to TP304,
adjust RT302 to reach 37,9025MHz ±
20Hz
5 AM
RX mode
Channel 40
Fine + coarse center position
Connect a voltmeter to TP 303,
and check 2,8V±0,2V.
6 AM
RX mode
Channel 1
Fine + coarse center position
Connect a voltmeter to TP 303,
and check 2,6V±0,2V.
7 USB
RX mode
Channel 20
L307 Fine + coarse center position
Connect a frequency counter to TP305,
adjust L307 to reach 10,6975MHz ± 20Hz