comparison: content/TeK2445.rst
content/TeK2445.rst
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| 13 tired PSU: unstable display, noise, then the typical noise of a | 13 tired PSU: unstable display, noise, then the typical noise of a |
| 14 capacitor failure. | 14 capacitor failure. |
| 15 | 15 |
| 16 Here is the beast: | 16 Here is the beast: |
| 17 | 17 |
| 18 .. image:: {static}images/tek2445/tek2445.jpg | 18 .. image:: {static}/images/tek2445/tek2445.jpg |
| 19 :alt: My old Tektronics 2445 scope | 19 :alt: My old Tektronics 2445 scope |
| 20 | 20 |
| 21 And some pictures of its womb: | 21 And some pictures of its womb: |
| 22 | 22 |
| 23 .. image:: {static}images/tek2445/tek2445_A1.jpg | 23 .. image:: {static}/images/tek2445/tek2445_A1.jpg |
| 24 :alt: The main analog board. | 24 :alt: The main analog board. |
| 25 | 25 |
| 26 .. image:: {static}images/tek2445/tek2445_top.jpg | 26 .. image:: {static}/images/tek2445/tek2445_top.jpg |
| 27 :alt: Top view of the scope. | 27 :alt: Top view of the scope. |
| 28 | 28 |
| 29 The PSU consists in two PCBs coupled with long jumpers. It's not very | 29 The PSU consists in two PCBs coupled with long jumpers. It's not very |
| 30 difficult to disassemble them but not that straighforard either. I've | 30 difficult to disassemble them but not that straighforard either. I've |
| 31 seen easier test equipments to take apart. | 31 seen easier test equipments to take apart. |
| 32 | 32 |
| 33 Whatever, its problem was a classic failure of several X2 and Y | 33 Whatever, its problem was a classic failure of several X2 and Y |
| 34 capacitors on the regulator board (A2): | 34 capacitors on the regulator board (A2): |
| 35 | 35 |
| 36 .. image:: {static}images/tek2445/PSU_A2.png | 36 .. image:: {static}/images/tek2445/PSU_A2.png |
| 37 :alt: The regulator board os the PSU. | 37 :alt: The regulator board os the PSU. |
| 38 | 38 |
| 39 .. image:: {static}images/tek2445/board_a2.jpg | 39 .. image:: {static}/images/tek2445/board_a2.jpg |
| 40 :alt: The regulator board os the PSU. | 40 :alt: The regulator board os the PSU. |
| 41 | 41 |
| 42 .. image:: {static}images/tek2445/board_a2_C1018.jpg | 42 .. image:: {static}/images/tek2445/board_a2_C1018.jpg |
| 43 :alt: Dead C1018 capacitor. | 43 :alt: Dead C1018 capacitor. |
| 44 | 44 |
| 45 | 45 |
| 46 and the inverter board (A3), mainly C1020, C1051 and C1052: | 46 and the inverter board (A3), mainly C1020, C1051 and C1052: |
| 47 | 47 |
| 48 .. image:: {static}images/tek2445/PSU_A3.png | 48 .. image:: {static}/images/tek2445/PSU_A3.png |
| 49 :alt: The inverter board of the PSU. | 49 :alt: The inverter board of the PSU. |
| 50 | 50 |
| 51 | 51 |
| 52 For now, I've replaced them with parts from old switching power | 52 For now, I've replaced them with parts from old switching power |
| 53 supplies (from old Dell and IBM computers), but I'd rather replace | 53 supplies (from old Dell and IBM computers), but I'd rather replace |
| 54 them with brand new components. I also still have some small display | 54 them with brand new components. I also still have some small display |
| 55 instabilities, which I need to investigate a bit more. I'll probably | 55 instabilities, which I need to investigate a bit more. I'll probably |
| 56 replace most of the electrolytics caps on the PSU so that I won't have | 56 replace most of the electrolytics caps on the PSU so that I won't have |
| 57 to repair again any time soon (famous last words). | 57 to repair again any time soon (famous last words). |
| 58 | |
| 59 |
