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Old 12-03-2016, 07:01 PM
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vts1134 vts1134 is offline
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Sencore VA62 Blows Line Fuse's been a tough few months here. To add insult to injury my VA 62 has decided to stop working. The unit blows the 1 amp line fuse immediately upon power up. Any suggestions on where to start, besides just throwing my hands up in disgust?
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Old 12-03-2016, 07:33 PM
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Electronic M Electronic M is offline
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Check for shorts at the plug with a DMM in ohms mode. If resistance is reasonable check the lytics on the rectified secondary (s)...If any of those lytics are shorted or very leaky they could pop the fuse.
Tom C.

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Reading between the scan lines since the mid 2000's.
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Old 12-04-2016, 03:56 PM
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Zenith6S321 Zenith6S321 is offline
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You may want to check the diodes on the power supply board to see if any have shorted. If so, then it may be a filter cap.
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Old 12-04-2016, 09:28 PM
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Findm-Keepm Findm-Keepm is offline
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And the pass transistor in the front panel DC bias supply - been there done that. Most likely though is the low voltage rectifiers someone mentioned earlier.
USN RET (Avionics / Cal)
CET- Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"

When fuses go to work, they quit!
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