PRESIDENT JOHNNY III ASC 12/24, Service Manual

Page: 7 / 66

ALIGNMENT VCO/PLL
1 - Alignment procedure (13,2V/26,4V;configuration”EU”)
STEP CONDITION ADJUSTMENT REMARKS OF ADJUSTMENT
1 FM(UK Eng)
RX mode
Channel 20
RT301
Connect a frequency counter to TP200,
and adjust RT301 to reach
38,48625MHz.
2 AM/FM(EU)
RX mode
Channel 20
RT302
Connect a frequency counter to TP200,
and adjust RT302 to reach
37,900MHz.
3 AM/FM(EU)
TX/RX mode
Channel 40
Connect a voltmeter to TP 303, and check:
Tx Channel 40=2,8V±0,2V
Rx Channel 40=3V±0,2V
4 AM/FM(EU)
TX/RX mode
Channel 1
Connect a voltmeter to TP 303, and check:
Tx Channel 1=2,5V±0,2V
Rx Channel 1=2,8V±0,2V
5 AM/FM(EU)
TX/RX mode
Channel 1 to 40
or 1 to 80(d)
Connect a frequency counter to TP200,
and check frequencies.