Old PSX SCPH 550x, trimmer pod (RV703), need value.

Firsts, srry form my english. I am looking someone who has PSX scph 550x, multimetr, and some time. I need value resistnace between pins 1 and 2, 1 and 3, 2 and 3. Like on this picture



https://assemblergames.com/threads/technical-info-about-ps1-pu-18.39972/

Thanks a lot all good persons for helps

 

SCPH-5500, Board P/N 1-664-537-11

1-2: 42.58k
1-3: 32.25k
2-3: 18.26k

These readings are with the OPU disconnected from CN702 and meter polarity doesn't seem to matter. Mechanical rotation of the pot is about 60% of travel.

Not sure how much this is going to help you though - the reason there is a pot there in the first place is that the settings for each console are different.

Also note that on this board RV703 affects only the wobble detector circuit for the copy protection, so the setting of this pot is irrelevant if you have a modchip installed.

 

Thank you very much.

I m destroy this trimmer potentiometer 9-10 years ago. I removed it.
Between 1-2 pins is 42,58 thats mean i need 50 K Ohms trimmer like this? https://www.ebay.com/p/100pcs-SMD-50k-Ohm-3x3-Potentiometer-Trimmer-Resistor-Evm3esx50b54/1848637118

"Also note that on this board RV703 affects only the wobble detector circuit for the copy protection, so the setting of this pot is irrelevant if you have a modchip installed."

Yes, modchip is instaled but trimmer pot its removed, thats mean driver CD and laser its still work without a potentiometer on MB?
Motor in driver it is spins 2 times, laser its work but low bright. On video
I buy this potentiometer and try.

Thanks again for your time.

 

Yes, it;s a 50k pot - and if you have correctly installed modchip then the console should still work even if that pot is broken.

If that pot is broken any you don't have a modchip, the console should still be able to read the CD - it will just identify everything either as an audio CD or "Please insert a PlayStation CD-ROM". From that video, I suspect you have a bad optical pickup - I would start by swapping the pickup and see if it works then.

 

Hey,
What im discaver, i opened laser pickup protection, becouse i want to see laser diode. Under the tape, between mirror and laser plate, a see (WTF), ball tray holder

Now, all works great, im happy
TriMesh thank you for yours usefull information.