Maintenance
6. If all or some of
the signals are missing, turn off the oscilloscope and
disconnect the display cable at J201 on the Main board. Carefully pull the
cable straight up from the connector to avoid damage.
7. Tu rn on the oscilloscope.
8. Probe the pi
ns of J201, checking for the same signals as in step 3.
9. If any of the signals are missing, the Main board module is probably defective.
Replace it.
TDS2000C Series Oscilloscope Service Manual 6–31