8 :series: Tek2445 PSU repair |
8 :series: Tek2445 PSU repair |
9 :series_index: 3 |
9 :series_index: 3 |
10 |
10 |
11 |
11 |
12 After having mostly `destroyed the PSU of my Tek 2445 |
12 After having mostly `destroyed the PSU of my Tek 2445 |
13 <{static}/TeK2445_2.rst>`_, I've decided to be a bit less foolhardy |
13 <{filename}/TeK2445_2.rst>`_, I've decided to be a bit less foolhardy |
14 and I've subscribed to the `yahoo Tek group`_. I discovered that such |
14 and I've subscribed to the `yahoo Tek group`_. I discovered that such |
15 a failure has already been reported there, also after a full recap of |
15 a failure has already been reported there, also after a full recap of |
16 the preregulator and regulator of the power supply. |
16 the preregulator and regulator of the power supply. |
17 |
17 |
18 I also found that I was not completely wrong when I built my |
18 I also found that I was not completely wrong when I built my |
84 |
84 |
85 .. image:: {static}/images/tek2445/tr1050_ratio_measurement.jpg |
85 .. image:: {static}/images/tek2445/tr1050_ratio_measurement.jpg |
86 :alt: Measuring the turn-ratios of the T1050 transformer. |
86 :alt: Measuring the turn-ratios of the T1050 transformer. |
87 |
87 |
88 I use CH2 of my scope to probe the signal produced by the `HP890A4 |
88 I use CH2 of my scope to probe the signal produced by the `HP890A4 |
89 <{static}/hp8904a.rst>`_ linked to pins 1 and 2 (thus a primary |
89 <{filename}/hp8904a.rst>`_ linked to pins 1 and 2 (thus a primary |
90 winding), and CH1 on a secondary winding (pins 6-7), which resulted |
90 winding), and CH1 on a secondary winding (pins 6-7), which resulted |
91 in: |
91 in: |
92 |
92 |
93 .. image:: {static}/images/tek2445/DS1Z_QuickPrint17.png |
93 .. image:: {static}/images/tek2445/DS1Z_QuickPrint17.png |
94 :alt: Measuring the turn-ratios of the T1050 transformer. |
94 :alt: Measuring the turn-ratios of the T1050 transformer. |