Icom IC-M604A Service Manual - Page 17
Pll Adjustments, Adjustment, Adjustment Condition, Measurement, Value, Point, Location, Adjust
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5-2 PLL ADJUSTMENTS ADJUSTMENT ADJUSTMENT CONDITION LOCK VOLTAGE 1 • Operating channel : ch P2 • Receiving 2 • Operating channel : ch P2 • Output power : Low • Transmitting 3 • Operating channel : ch 70 • Receiving MEASUREMENT UNIT LOCATION MAIN Connect a digital multi-meter or oscilloscope to check point CP1. Connect a digital multi-meter or oscilloscope to check point CP2. VALUE 3.8 V - 4.0 V 3.1 V - 3.3 V 2.4-3.7 V ADJUSTMENT POINT UNIT ADJUST MAIN L62 L73 Verify • MAIN UNIT TOP VIEW CP1 Lock voltage check point for RX L62 Lock voltage adjustment for RX L73 Lock voltage adjustment for TX CP2 Lock voltage check point for TX 5 - 2
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• MAIN UNIT TOP VIEW
Lock voltage
adjustment for TX
L73
Lock voltage
check point for RX
CP1
Lock voltage
check point for TX
CP2
Lock voltage
adjustment for RX
L62
5-2 PLL ADJUSTMENTS
LOCK
VOLTAGE
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
2
3
• Operating channel : ch P2
• Receiving
• Operating channel : ch P2
• Output power
: Low
• Transmitting
• Operating channel : ch 70
• Receiving
MAIN
Connect a digital
multi-meter or oscil-
loscope to check
point CP1.
Connect a digital
multi-meter or oscil-
loscope to check
point CP2.
3.8 V – 4.0 V
3.1 V – 3.3 V
2.4–3.7 V
MAIN
L62
L73
Verify
5 - 2