ysus-ipm trouble -Elonex 50"

[Cornboats]

Ysus board LG 6870QYC004C

Another set with a blown IPM.

Having removed the yppd J015B from the board the components marked Q1,Q2, Q3 & Q4 have all blown up.

3 questions for anybody who has had similar problems.

1) What are these components-
2) Can they be replaced by off the shelf components.
3) Why do these keep blowing?


In removing the IPM smd components B38 & B39 connected to diode D12 on the Ysus board got wrecked. What are these components?

My atlas passive component analyser shows them as having no resistance or inductance.

[mbates14]

Re: ysus-ipm trouble -Elonex 50"

Ysus board LG 6870QYC004C

Another set with a blown IPM.

Having removed the yppd J015B from the board the components marked Q1,Q2, Q3 & Q4 have all blown up.

3 questions for anybody who has had similar problems.

1) What are these components-
2) Can they be replaced by off the shelf components.
3) Why do these keep blowing?


In removing the IPM smd components B38 & B39 connected to diode D12 on the Ysus board got wrecked. What are these components?

My atlas passive component analyser shows them as having no resistance or inductance.

1) What are these components-
Half-bridge drivers. they are voltage amplifiers for the sustain waveform generated on the logic board.

2) Can they be replaced by off the shelf components.
No, only with replacement YPPDs. Some cases you can build a discrete circuit to replicate that. but your results may vary.

3) Why do these keep blowing?
CHINA

[Cornboats]

Re: ysus-ipm trouble -Elonex 50"

Many thanks for your response.

Its a pity we can't come up with a reliable alternative.

I can get an IPM module but can't find any info on the smd components I damaged ref B38 & B39. The IPM supplier said they were coupling capacitors-(value not known).

They read on my annalyser as 0 resistance/inductance.

Have you any ideas if I can replace with an alternative?