Akai PDP4294LV1 Manuel de service télécharger pdf (Page 94)

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Forward : test 1 GND(＋) , Sus-out(－)

2 Sus-out(＋),Vs(－)

3 ER-DN(－),ER-COM(＋)

4 ER-COM(－),ER-UP(＋)

when each 4 TEST Diode value is over 0.4V => OK

Reverse : test 1 GND(－) , Sus-out(＋)

2 Sus-out(－),Vs(＋)

3 ER-DN(＋),ER-COM(－)

4 ER-COM(＋),ER-UP(－)

when each 4 nodes TEST Diode value is infinity => OK

※ Specially, the value of ER-UP,COM,DN in the Y/Z board, should be

checked all of them. but, the terminal of Vs,Sus-out,GND,

we must aware to know after check one of IPM because it is parallel.

Æ if no problems, check 15V(Y,Z B/D) with GND, Î Forward value 0.3V,

Reverse value infinite. If no problems,

4. Trouble shooting.

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How to check IPM

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Akai PDP4294LV1 Manuel de service Page 94