HP 53131A, 53132A STBY Switch Great Transformation
Modify the STBY switch to the main
power switch,
When the STBY
switch is OFF, use the relay to completely cut off the AC
input.
STBY Switch to Main Power Switch
Modify the Stby switch to the main
power switch (disconnect the AC input completely using the relay) 
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STBY Switch to Main Power Switch
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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-9V |
9V GND |
NC |
-12 |
GND |
+12V |
GND |
GND |
+5V |
+5V |
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280mA |
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2.1A |
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5A |
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STBY |
0 |
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0.39A |
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0.6A |
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ON |
300mA |
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0.97A |
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1.58A |
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AC Power |
OFF : 0.186A ON : 0.29A |
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CH3 Main PCB |
TIME BASE Main PCB |
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Frequency Standard & HIGH STABILITY OSCILLATOR
