ByteRot :: PlayStation SCPH-5501 Motor Speed Adjustment (KSM-440ADM/AEM+)

BYTEROT - retro PCs, consoles and lost software

Get an account

Accounts are free. Join #retro on irc.fxnet.org, identify with NickServ and type !req.

[ how ]

IRC

#retro on irc.fxnet.org
6697 ssl · 6667 plain
modern + vintage clients welcome

[ vintage how-to ]

Sections

OS 1,075

DRIVERS 61

SOFTWARE 22

GAMES 10

UTILS 37

DOCS 561

INCOMING 0

REQUESTS 0

LIBRARY 25,406 files

Some stats

releases	1,766
last 24h	+750
online	404.1 GB
library	1.2 TB
members	0
updated	2026-10-04 23:30

PlayStation SCPH-5501 Motor Speed Adjustment (KSM-440ADM/AEM+)

Device	PlayStation
Difficulty	Difficult
Time	1 - 3 hours
Steps	9

This guide is by Nick on iFixit and is licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0. ByteRot mirrors it for non-commercial preservation: formatting changed and photos resized for old browsers; full-size photos and the text are on the FTP in /DOCS/REPAIR. Original guide >>

Is your PlayStation SCPH-550x having trouble reading games? This guide will show you how to extend the life of the existing laser you already have so you can either get another system, or replace the failed laser unit. On many of these older Playstations, this is a known failure point.

In the case of the system used for the guide, it was only recovered to 50-60% read after adjustment. The laser needs to be replaced and cannot be reliability re-adjusted.

Guide notes

This is often a temporary or partial fix! While you may permanently repair the system, it is very unlikely to hold up over the long term.
THIS WILL NOT RECOVER KSM-440AAM and ACM laser assemblies. These fail due to a plastic optical block known for physically degrading. You must replace the laser unit on these - no way around it.
This guide is intended to be used on the KSM-440ADM laser, or newer. These use a magnesium optical block, and do not wear down like the plastic block.
If you have a issue with this laser beyond the ability to adjust it, the KSM-440BAM laser may work, depending on which system you own. As this assembly is designed for the PSOne, it must be gapped to fit these units with spacers. Note: If you do this, the laser trimpot on the board MUST be adjusted.

Tools: Multimeter; Pro Tech Go Toolkit

Step 1 :: Change note

• CAUTION: Due to the EET missing several components present in the Pro Tech Go and only being $20 cheaper, the EET has been removed (https://www.ifixit.com/en-ca/products/essential-electronics-toolkit). The EET will work for this guide as-is, but if you are shopping for a new toolkit to complete this guide, the Pro Tech Go (new or refurbished, refurbished is ~$32 cheaper) (https://www.ifixit.com/en-ca/products/pro-tech-go-toolkit), or Pro Tech ($79 new/~$59.95 refurb) is the current recommended toolkit for this guide.
• If you are interested in a refurbished kit stock levels change frequently but can be found here (https://www.ifixit.com/Search?query=Refurbished+).

Step 2 :: Is your system recoverable?

• CAUTION: Before starting, make sure you have a die cast laser. Plastic lasers are not repairable.
• If your laser is plastic: You must replace the laser due to uneven wear.
• If you have a Die cast laser, this fix may improve the read rate. However, this is an age based failure. Note: In some cases, the laser resistance will need to be adjusted.

Step 3 :: Opening the system

• NOTE: EET owners: Your kit has this bit. No purchase needed.
• Remove the 6 screws from the bottom of the PlayStation. Use a Phillips #2 screwdriver.
• Lift the top cover off.

Step 4 :: Disconnect the laser

• Disconnect the laser from the system.

Step 5 :: Repair sanity check

• NOTE: EET owners: Your kit has this bit. No purchase needed.
• With the laser removed from the system, remove the 2 Phillips PH1 screws. Check if the laser is plastic.
• NOTE: If the laser is plastic, it cannot be repaired and must be replaced. The example shown can be adjusted.

Step 6 :: Adjust the motor trimpot

• NOTE: EET owners: Your kit has this bit. No purchase needed.
• CAUTION: Only adjust this enough to reliably read games and music CDs again. If the speed is too slow, the laser may physically "burn" your games, albeit very unlikely unless you adjust the laser trimpot on the mainboard.
• CAUTION: Consider anything less then a 80-90% read rate a failure. These are hard to recover reliably.
• Before starting, mark the original adjustment point and write down the factory setting as tested. It will be difficult to take it back to stock without this information.
• Adjust the trimpot incrementally using a Phillips PH1 or other compatible bit. Do this until the laser is reading games more consistently.

Step 7 :: Test the repaired system

• REMINDER: If possible, test on a known good system first.
• NOTE: Improving the read percentage: If you are not happy with the results, keep adjusting the motor. Repeat until you are happy with the passing read rate, or the motor doesn't spin.
• REMINDER: If you see the Insert PlayStation CD-ROM screen, the motor is running slow. Adjust the speed to be faster.
• Partially reassemble the system and test it. If it is sufficient, reassemble the system.
• To test the read percentage, get a few known good games and see which ones load. A minimum of 5 test games is recommended. Only adjust the laser again after each full test is done.
• If the game loads, test play the system for a few minutes to check the stability. Important: Some early revisions have FMV issues - THIS IS EXPECTED.

Step 8 :: Test data - control system (SCPH-101)

• Control system results

Step 9 :: Test data - repaired system (SCPH-5501)

• Repaired SCPH-5501 results

Conclusion

To reassemble your device, follow these instructions in reverse order.

Credit