CITRONIC PPX for help

pengpeng · 9th February 2009, 02:10 PM

I got a used ppx900 and it looks fine. But sometime one channel outputs inappositely, it seems HF distortion.

I check output DC and bias, seem in gear. I should contrast with both channels but the trouble is not always appears and the unit is too heavy to overturn timely. Is it some caps or magnifying audions become bad condition?

I have got the schematics. If anyone have its service manual, could help me strongly.
Thank in advance.

py@chainzone.com wishfully.

pengpeng · 10th February 2009, 01:34 AM

I check and affirm in vol. magnify step the working condition of pair PNP dions MPSA93 have changed.

What other PNP dions can instead of MPSA93?

9th February 2009, 02:10 PM	#1
pengpeng diyAudio Member Join Date: Feb 2009	CITRONIC PPX for help I got a used ppx900 and it looks fine. But sometime one channel outputs inappositely, it seems HF distortion. I check output DC and bias, seem in gear. I should contrast with both channels but the trouble is not always appears and the unit is too heavy to overturn timely. Is it some caps or magnifying audions become bad condition? I have got the schematics. If anyone have its service manual, could help me strongly. Thank in advance. py@chainzone.com wishfully.

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10th February 2009, 01:34 AM	#2
pengpeng diyAudio Member Join Date: Feb 2009	I check and affirm in vol. magnify step the working condition of pair PNP dions MPSA93 have changed. What other PNP dions can instead of MPSA93?