Pll Adjustment; Power Voltage Adjustment - Icom IC-M710 Service Manual

4-2 PLL ADJUSTMENTS
ADJUSTMENT ADJUSTMENT CONDITION
1 • Display frequency
REFERENCE
• Mode
LOOP LOCK
• Receiving
VOLTAGE
2 • Display frequency
1 • Display frequency
MAIN
• Receiving
LOOP LOCK
VOLTAGE
2 • Display frequency
1 • Wait for 5 minutes after power ON.
REFERENCE
• Terminate P3002 on the PLL unit
FREQUENCY
to ground with a 50 Ω resister.
• Receiving
2
[GMDSS]: [GEN-23], [EUR-22]

4-3 POWER VOLTAGE ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION
1 • Turn power ON.
13.6 V
VOLTAGE
([EUR] only)
[EUR]: [EUR-21], [EUR-22]
UNIT
: 7.9999 MHz PLL
: J3E
: 0.0300 MHz
: 0.5000 MHz PLL
: 29.9999 MHz
PLL
[Others]: [GEN-21], [GEN-22], [EUR-21]
UNIT
MAIN
MEASUREMENT
LOCATION
Connect a digital 3.2 V
multimeter or oscillo-
scope to check point
J3004.
More than 1.5 V
C o n n e c t a d i g i - 4.0 V
tal multimeter or
o s c i l l o s c o p e t o
check point J3005.
More than 1.0 V
Connect an RF volt- Maximum level
meter to check point (More than +2 dBm)
P3002.
Connect a frequency 60.000000 MHz
counter to check
point P3002.
MEASUREMENT
LOCATION
Connect a DC volt- 13.6 V
meter to L106.
4 - 2
ADJUSTMENT
POINT
VALUE
UNIT ADJUST
PLL
PLL
PLL
ADJUSTMENT
POINT
VALUE
UNIT ADJUST
REG
C3049
Verify
L3024
[GMDSS]
R3223
[Others]
Verify
L3004
L3005
X3002
[GMDSS]
L3003
[Others]
R8013