Enraf Nonius 1403773, Service Manual

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Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Maintenance June 1997 4-13
- Remove the connection between TP16 and TP17 and connect an ampère-meter
(DC-mode) instead of it, see appendix B, fig.8.
- Place the test jumper at ST4, see appendix B, fig.8.
See appendix B, fig. 8 for lay-out of the adjustment / connection points.
Warning: At the mounting base of the power transistors near jumper ST4 voltages
up to 400V. are present. Do not touch when the Curapuls 670 is
switched on!
- Switch on the Curapuls 670 and select test 38, par. 4.6.4. (see par. 4.3.2 for entering
the service mode).
- Choose subselection 0 (300W HF output) and press the start / stop key,
C162 Adjust C162 until the voltmeter gives a maximum reading.
L20 Adjust with L20 until the voltmeter indicates 2.45 volt ± 0.05 volt.
0.7A Check that the current is less than 0.7 Ampere,
L15 If the current is more than 0.7A, adjust by pressing L15.
(if this does not work; an alternative can be to compensate with L23). Check if
the voltmeter is still at maximum reading.
- press the start / stop key
ST4 Remove the jumper from ST4.
- Choose subselection 1 (200W HF output) and press the start / stop key,
P1 Adjust P1 until the voltmeter reads 2.00 volt ± 0.1 volt.
0.6A Check that the current is less than 0.6 A.
The calibration of the Curapuls 670 is completed.
4.6.5 Frequency / SWR adjustment Circuplode (Test 39)
- Connect the Circuplode to output channel A
- Select test 39, par. 4.6.3 (see par. 4.3.2 for entering the service mode).
- Adjust the Circuplode until the Result dec. display reads 27.14
For technical information about adjustment of the Circuplode(s) see:
Service manual “Curamed and Curapuls accessories” (Part number 1419.781).