Akai PDP4294LV1, Руководство по обслуживанию

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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.
◎
How to check IPM