SCPH-7502 and multiple laser troubleshooting frustration

General PSX CD Troubleshooting, PSX CD-ROM Mastering and Disc Creation
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mysfiring
Interested PSXDEV User
Interested PSXDEV User
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Joined: November 27th, 2018, 7:38 am

SCPH-7502 and multiple laser troubleshooting frustration

Post by mysfiring » January 6th, 2019, 4:00 pm

Hi there,

I have a SCPH-7502 fitted with a Chinese laser assembly, and it attempts, but is not successful in getting to 2x speed. (The drive spins up, stops for a moment, retries, and then stops spinning completely; noises sound typical.) At this point I'm questioning both the console and the laser assembly: when a known good (another clone) laser is installed, I get nothing; when the 7502's laser is swapped out into another console, it also doesn't work.

Suggested next troubleshooting steps? I want to avoid touching the ribbon pot if I can help it, as I don't currently have access to an oscilloscope.

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