Icom IC-756PRO III - Page 23

4 - 3
P81
Reference frequency
check point
L52
L81
C454
LPL-B lock voltage
adjustment
L82
Reference
frequency
adjustment
VCO-A
lock voltage
adjustment
VCO-B
lock voltage
adjustment
LPB
LPL-B lock voltage
check point
C278
C228
C208
C258
C508
C558
C578
C528
P361
1LO-A output level
check point
R33
Reference
frequency
adjustment
LVA
VCO-A lock voltage
check point
P851
Marker output level
check point
LPA
LPL-A lock voltage
check point
C154
LPL-A lock voltage
adkustment
P801
3LO output level
check point
P651
1LO-B output level
check point
LVB
VCO-B lock voltage
check point
P901
S2LO output level
check point
P701
S3LO output level
check point
• PLL unit
Bottom view of the transceiver
PLL unit
PLL ADJUSTMENTS—continued
S2LO
OUTPUT
LEVEL
MARKER
OUTPUT
LEVEL
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
1
• Display freq. : Any
• Receiving
• Display freq.
: Any
• Receiving
PLL
PLL
Connect an RF volt-
meter to the check
point P901.
Connect an oscil-
loscope to the check
point P851.
–3 dBm or more
4 Vp-p or more
Verify
Verify