Agilent Technologies 54835A Check +15 V Bias and Remote Inhibit cabling, Replace the power supply

Chapter 5: Troubleshooting

Power Supply Trouble Isolation

ECheck +15 V Bias and Remote Inhibit cabling.

If the oscilloscope will not power up, check all cabling to troubleshoot and correct the problem.

Figure 5-4 shows the routing of the +15 V Bias and Remote Inhibit signals from the front panel to the power supply. The power supply is on only when the remote inhibit signal is between

+1 V and +5 V. A problem could be caused by a faulty cable or bad connector anywhere in this path. Check all the cables and connections and replace any at fault.

Figure 5-5

1

1

55

55

9

+15 V Bias

Front Panel Power
	Switch
A8 Cursor Keyboard
				W15
A7 Front Panel Keyboard
		3
				W16
	J3	3
A6 Scope Interface Board
	J2	49
				W11
	J16	49
A13 Acquisition Board
	J11	11
				W2
			Remote Inhibit
A1 Power Supply

Routing of +15 V Bias and Remote Inhibit Signals

FReplace the power supply.

1 If the +15 V bias is correct, but the instrument will not power up with a 196-220Ωresistor,

replace the power supply. Chapter 6 explains how to remove and replace the power supply.

2Re-assemble the instrument and apply power.

G Check for the oscilloscope display onscreen.

1You should see the oscilloscope display (see figure 5-2). If not, see the No Display Trouble Isolation Flowchart.

2If you see the display, return to the Primary Trouble Isolation Flowchart.

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