Icom IC-756PRO Service Manual

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
• PLL unit
Bottom view of the transceiver
PLL unit
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 ADJUSTMENTS—continued
S2LO
OUTPUT
LEVEL
MARKER
OUTPUT
LEVEL
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
1
• Display frequency : Any
• Receiving
• Display frequency : Any
• Receiving
PLL
PLL
Connect an RF volt-
meter to check point
P901.
Connect an oscillo-
scope to check point
P851.
0 dBm or more
4 Vp-p or more
Verify
Verify

Icom IC-756PRO Specifications

General

Brand	Icom
Model	IC-756PRO
Category	Transceiver
Language	English