1730–Series Maintenance
6–13
c.
Using the digital multimeter, measure the voltage between TP1 and the
collector of Q1. It should be approximately –140 V.
d. Reconnect the lifted end of R24.
3. Z-Axis Amplifier Check
a. Unsolder and lift one end of R8.
b. Power up the power supply.
c.
Using the digital multimeter, measure the voltage between TP1 and the
collector of Q4. It should be approxi10 V.
d. Short together the base and emitter of Q5. The collector of Q4 should be
approxi100 V.
e.
Reconnect the lifted end of R8.
4. Grid Drive Check
a. Turn off the power supply. Use the diode check on the digital multime-
ter to test CR1, CR2, CR3, CR5, and CR6 for shorts.
b. Power up the power supply.
c.
Using the digital multimeter, measure the voltage between TP1 and the
cathode of CR5. It should vary between approxi75 and +200 V
as R58 (CRT Bias) is adjusted.
d. Connect the oscilloscope probe to the anode of CR5 and the probe
ground to TP1. The signal should be a clipped sine wave of +75 to +200
V p-p.
5. High Voltage Oscillator Check
a. Connect the oscilloscope probe to T1 pin 3 (Q6 collector) and the probe
ground to TP1. Power up the supply. The signal should be a +60 V p-p,
22 kHz sine wave.
b. Check the voltages listed in Table 6–6 using the digital multimeter:
Table 6–6: High Voltage Oscillator Test Points
Circuit Location
Voltage
T1, pin 4
Approxi40 V
T1, pin 13
Less than +2 V
Summary of Contents for 1730 Series
Page 4: ......
Page 12: ...Contents viii...
Page 17: ...Introduction and Specifications...
Page 18: ......
Page 32: ...1730 Series Introduction 1 14...
Page 33: ...Operating Instructions...
Page 34: ......
Page 62: ...1730 Series Operating Instructions 2 28...
Page 64: ...Service Safety Summary S 2 1730 Series B070000 Above...
Page 66: ......
Page 67: ...Installation...
Page 68: ......
Page 82: ...1730 Series Installation 3 14...
Page 83: ...Theory of Operation...
Page 84: ......
Page 115: ...Checks and Adjustments...
Page 116: ......
Page 159: ...Maintenance...
Page 160: ......
Page 180: ...1730 Series Maintenance 6 20 3 Remove the board by slipping it through the front panel opening...
Page 184: ...1730 Series Maintenance 6 24 Figure 6 8 Repackaging a 1730 Series instrument...
Page 185: ...Options...
Page 186: ......
Page 189: ...Replaceable Electrical Parts...
Page 190: ......
Page 222: ...1730 Series Replaceable Electrical Parts 8 32...
Page 223: ...Diagrams Circuit Board Illustrations...
Page 224: ......
Page 246: ......
Page 247: ...Replaceable Mechanical Parts...
Page 248: ......
Page 255: ...1730 Series Waveform Monitor FIG 1 EXPLODED VIEW A1 A3 A2 A3A1 A10 A11...
Page 256: ...1730 Series B070000 Up...
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