To Check The 6000A Series Or 6000L Series System Board; Table 13 System Board Test Points - Agilent Technologies 6000 Series Service Manual

4 Troubleshooting

To check the 6000A Series or 6000L Series system board

86
1 Remove the cabinet.
2 Check that all cable connections are securely connected from
the system board to:
Power supply
•
Keyboard (6000A Series only)
•
Display (6000A Series only)
•
Inverter board (6000A Series only)
•
Fan
•
3 Verify the voltages at the system board test points listed in
the table below. Refer to
test points.
Table 13 System Board Test Points
Test point Voltage
L3204 3.3 (+- 0.1)
L3201 5.0 (+- 0.1)
L3301 1.5 (+- 0.1)
L3302 -5.2 (+- 0.1)
4 If the voltage at test point L3301 and/or L3302 is not within
the specified range, replace the system board.
5 (This step applies to 6000A Series models only)
If the voltage at test point L3204 and/or L3201 is not correct:
Disconnect J2730 from the system board and measure
•
pins 19 and 20 on the system board connector. This is the
voltage to the display, and it should be 3.3V. If it is not,
replace the system board. If the voltage is correct, replace
the display.
Disconnect J2750 from the system board and measure
•
pins 3 and 4. This is the voltage to the inverter, and it
should be 5 V. If it is not, replace the system board. If the
voltage is correct, replace the display.
Figure 14 on page 82 to locate the
Output from
regulator:
U3202
U3202
U3300
U3301
6000 Series Oscilloscopes Service Guide