#31
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Circuit or IC protectors can look like this too...
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#32
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There is a three leg transistor like that on the board. When I plug it in, as I mentioned, the VCR is completely dead, but that little guy heats up hot. So the power supply is doing its job and delivering power to the mainboard.
How do I fix it, and why did it fail? Would a photo help? Looks like the bottom right one in this picture. |
#33
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I've visually identified four three-leg IC protectors.
With a continuity multimeter, connecting the voltage pins of the 2nd and 3rd protectors makes the VCR do stuff. With the power off, all the ground pins go to metal cage ground EXCEPT for the first transistor. How do I fix/confirm this situation? It says D1776 on it. Here are the results for the voltages: 1: Vin=13V, Vout=9V 2: (makes click if bridged): Vin=13V, Vout=0V 3: (makes click if bridged): Vin = 13V, Vout = 0V 4: Vin=13V, Vout=0.6V I tried bridging 2 and 3 but the VCR still doesn't turn on, though the mechanism clicks. D1776 datasheet (transistor 1). EDIT: I think I might've been way off on transistor 1 being an IC protector. Last edited by Outland; 10-26-2016 at 08:33 PM. |
#34
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The part you are describing is a power transistor (2SD1776). Sams has the OEM manual for the PV-4060K Item number 199750 for $20.00. All the best,Tom.J
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#35
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You are right.
Are IC protectors on the mainboard or power supply? Because the power supply is delivering power to the mainboard. I can even make the mechanism move if I ground some of the pins on the mainboard. |
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