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432: Difference between revisions
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Image:Tek 432 3.jpg | Image:Tek 432 3.jpg | ||
File:Tek_432_internal_1.jpg | File:Tek_432_internal_1.jpg | ||
This shows the area around the BNC input connectors for channels 1 and 2. I was cleaning the vertical gain rotary switches which had become flaky after 45 years. | |||
File:Tek_432_internal_2.jpg | File:Tek_432_internal_2.jpg | ||
View from the rear. The vertical gain attenuator switches are under the metal covers. | |||
File:Tek_432_internal_3.jpg | File:Tek_432_internal_3.jpg | ||
When the metal covers are removed, one can see the shaping/compensation capacitors. These can be unplugged, each one has 6 legs. | |||
File:Tek_432_internal_4.jpg | File:Tek_432_internal_4.jpg | ||
Another view of the shaping capacitors. Work on one channel at a time to avoid mixing these up. | |||
File:Tek_432_internal_5.jpg | File:Tek_432_internal_5.jpg | ||
In order to access the rotary gain switch fingers, one must first remove these BNC connectors, which means unsoldering the central wire (connects to a resistor/inductor feed-through) plus a debouce capacitor and lead going to the x1 x10 indicator lights. | |||
File:Tek_432_internal_6.jpg | File:Tek_432_internal_6.jpg | ||
Close up view of BNCs | |||
File:Tek_432_internal_7.jpg | File:Tek_432_internal_7.jpg | ||
Close up view of BNCs | |||
File:Tek_432_internal_8.jpg | File:Tek_432_internal_8.jpg | ||
Close up view of BNCs. These need to be unsoldered for removal, but nothing else must be unsoldered to access/clean the vertical gain rotary switch. | |||
File:Tek_432_internal_9.jpg | File:Tek_432_internal_9.jpg | ||
View of the input preamp. This board needs to be unplugged only, but not removed or unsoldered. It has four 2-pin connectors. Then it can be removed, still attached to the compensation capacitor carriers. | |||
File:Tek_432_internal_10.jpg | File:Tek_432_internal_10.jpg | ||
Lifting off the assembly consisting of the 2 compensation capacitor carrier plus the vertical preamp board plus the push-button switch board for CH1/CHOP/ALTERNATE/CH2. The switch board has two plug connectors below that must be removed. It helps to have long fingers or a good pair of needle nose pliers. | |||
File:Tek_432_internal_11.jpg | File:Tek_432_internal_11.jpg | ||
Second view under the assembly being removed. | |||
File:Tek_432_internal_12.jpg | File:Tek_432_internal_12.jpg | ||
File:Tek_432_internal_13.jpg | File:Tek_432_internal_13.jpg | ||