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QSC PLD4.2 PSU Transistors

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coper View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coper Quote  Post ReplyReply Direct Link To This Post Topic: QSC PLD4.2 PSU Transistors
    Posted: 25 June 2022 at 12:26pm
Hi,

I'm trying to repair a QSC PLD4.2 amplifier and I don't know what the original SMPS transistors are.
The transistors are Q64 and Q65. This amplifier has already been repaired and someone put in a STP11NM60FD and a STP45N65M5! One of them is shorted.
Does anyone know what the original references are ?

Thanks.

Edited by coper - 25 June 2022 at 12:28pm
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simonp1100 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote simonp1100 Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2022 at 12:46pm
Hi, 

The circuit diagram for the QSC PLD4.3 amplifier says they both should be the same type of:--

QD-000495-00 MOSFET N-CHANNEL,650V,42A,,STP57N65M5,TO-220, 2 Q65,Q64
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