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Old 9th June 2006, 09:41 AM   #1
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Default How can a CD be adjusted by eye pattern?

I have a Philips CD482 (CDM 4/19, SAA 7310, 7220, TDA1543(>2*TDA1541 +OPA627U+AD829). But I have no service manual and will adjust the servo part. I know it's possible to adjust the focus and laser current (carefuly!) by eye pattern on the screen. So I have also a Tectronix 2225 (50MHz) i will be thankful for some hints for such a procedure.
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Old 10th June 2006, 04:14 AM   #2
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Adjust the eye pattern on your scope so that it has the highest and clearest signal. I know that some design; the scope gnd conncetion should be connected to Vref rather than the gnd/-ve of the CDP power supply.

Hope this helps.
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Old 12th June 2006, 07:32 AM   #3
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Thank you vt4c!
This is very valuable information. I find also a very extensive information about CD repair here:[COLOR=blue]
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