36,756
edits
Back-lit switches: Difference between revisions
no edit summary
No edit summary |
No edit summary |
||
| Line 6: | Line 6: | ||
The lamps are not supplied from the standard +5 V (logic supply) rail but from a separate lamp supply rail which is not present in all mainframes (e.g. missing from most 76x3 series scopes). In mainframes that do supply the lamps, the lamp voltage (and therefore lamp intensity) can often be varied, e.g. through a 3-way (off/mid/high) switch in the back of the instrument. In the [[7904]] (non-A), this is a front panel control. | The lamps are not supplied from the standard +5 V (logic supply) rail but from a separate lamp supply rail which is not present in all mainframes (e.g. missing from most 76x3 series scopes). In mainframes that do supply the lamps, the lamp voltage (and therefore lamp intensity) can often be varied, e.g. through a 3-way (off/mid/high) switch in the back of the instrument. In the [[7904]] (non-A), this is a front panel control. | ||
<gallery> | |||
backlit-sw-1.jpg | |||
Tek-pushbutton-light-on.jpg | |||
Tek-pushbutton-light-off.jpg | |||
</gallery> | |||
[[Category:Repair issues]] | [[Category:Repair issues]] | ||