Tektronix THS710A Manual do Utilizador descarregar pdf (Página 118)

Maintenance

6–36

THS710A, THS720A, THS730A & THS720P Service Manual

Follow these steps to troubleshoot the input connections only if the following

condition is true: the instrument appears to function normally in every way

except you have determined that the channel 1, channel 2, or DMM signal is not

getting into the instrument as expected.

1. Remove the front cover using the procedure Front Cover on page 6–11.

2. Remove the chassis assembly from the back cover using the procedure Back

Cover on page 6–19.

3. Check that the coaxial connections to the back side of the channel 1 and

channel 2 BNC connectors are intact. Use the DMM to measure continuity

from the BNC connector to the end of the coaxial cable where it attaches to

the main board.

4. Check that the wire connections to the back side of the DMM and COM

banana jacks are intact. Use the DMM to measure continuity from the

banana jacks to the end of the wire where it attaches to the main board.

5. If no problem is found and the trouble persists, the main board is probably

defective in some way that the internal diagnostics cannot detect. Replace it.

Input Connections

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Tektronix THS710A Manual do Utilizador Página 118