Which replacement laser for which revision?

Post a topic about yourself to let others know your skills, hobbies, etc.
Post Reply
shawly
Interested PSXDEV User
Interested PSXDEV User
Posts: 7
Joined: August 8th, 2019, 10:46 pm

Which replacement laser for which revision?

Post by shawly » November 14th, 2019, 9:10 pm

I got a couple of systems with defective lasers or reading issues.
I've fixed one of them, my SCPH-1002, by replacing the laser with a KSM-440BAM and now the system can read backups and originals perfectly fine again.

I still got an SCPH-5002, an SCPH-7502 and an SCPH-9002. AFAIK the length of the ribbon cable of the KSM-440BAM can be an issue depending on the system's revision so can anyone tell me which replacement laser I can buy for those systems?

The 5002 just has some reading issues so I guess adjusting the pot could suffice, but the 7502 and the 9002 can't read anything and pot adjustments didn't help.

User avatar
Shadow
Admin / PSXDEV
Admin / PSXDEV
Posts: 2405
Joined: December 31st, 2012, 5:37 pm
PlayStation Model: H2000/5502

Re: Which replacement laser for which revision?

Post by Shadow » November 17th, 2019, 2:22 pm

You can buy ribbon extensions for the PSX lasers. Run a Google search for them :)
Development Console: SCPH-5502 with 8MB RAM, MM3 Modchip, PAL 60 Colour Modification (for NTSC), PSIO Switch Board, DB-9 breakout headers for both RGB and Serial output and an Xplorer with CAETLA 0.34.

PlayStation Development PC: Windows 98 SE, Pentium 3 at 400MHz, 128MB SDRAM, DTL-H2000, DTL-H2010, DTL-H201A, DTL-S2020 (with 4GB SCSI-2 HDD), 21" Sony G420, CD-R burner, 3.25" and 5.25" Floppy Diskette Drives, ZIP 100 Diskette Drive and an IBM Model M keyboard.

shawly
Interested PSXDEV User
Interested PSXDEV User
Posts: 7
Joined: August 8th, 2019, 10:46 pm

Re: Which replacement laser for which revision?

Post by shawly » November 17th, 2019, 9:26 pm

Oh really? So I can just install BAMs in all systems, that's nice! Just found the extension on Aliexpress. Thanks for the tip!

User avatar
NITROYUASH
Serious PSXDEV User
Serious PSXDEV User
Posts: 121
Joined: January 7th, 2018, 12:03 am
I am a: Game Designer
PlayStation Model: SCPH-5502
Steam: NITROYUASH
Location: Russian Federation
Contact:

Re: Which replacement laser for which revision?

Post by NITROYUASH » November 17th, 2019, 11:43 pm

I bought PS1 FAT with a broken CD Drive for only 14-15$ (lol) and just replace the entire broken SCPH-5502 CD Drive (KSM) using CD Drive (BAM) from the latest PSOne and it works like it's always been there. But yes, I needed to buy a laser ribbon extension because a cable from BAM too short for my PS1 FAT model.

User avatar
Shadow
Admin / PSXDEV
Admin / PSXDEV
Posts: 2405
Joined: December 31st, 2012, 5:37 pm
PlayStation Model: H2000/5502

Re: Which replacement laser for which revision?

Post by Shadow » November 18th, 2019, 3:18 pm

NITROYUASH wrote:
November 17th, 2019, 11:43 pm
I bought PS1 FAT with a broken CD Drive for only 14-15$ (lol) and just replace the entire broken SCPH-5502 CD Drive (KSM) using CD Drive (BAM) from the latest PSOne and it works like it's always been there. But yes, I needed to buy a laser ribbon extension because a cable from BAM too short for my PS1 FAT model.
I did the same thing because the only drives that work nowadays are the ones from the PSone's :lol:
Development Console: SCPH-5502 with 8MB RAM, MM3 Modchip, PAL 60 Colour Modification (for NTSC), PSIO Switch Board, DB-9 breakout headers for both RGB and Serial output and an Xplorer with CAETLA 0.34.

PlayStation Development PC: Windows 98 SE, Pentium 3 at 400MHz, 128MB SDRAM, DTL-H2000, DTL-H2010, DTL-H201A, DTL-S2020 (with 4GB SCSI-2 HDD), 21" Sony G420, CD-R burner, 3.25" and 5.25" Floppy Diskette Drives, ZIP 100 Diskette Drive and an IBM Model M keyboard.

User avatar
TriMesh
PSX Aptitude
PSX Aptitude
Posts: 201
Joined: December 20th, 2013, 2:25 pm
PlayStation Model: DTL-H1202
Location: Hong Kong

Re: Which replacement laser for which revision?

Post by TriMesh » January 30th, 2020, 5:30 pm

It's easiest to base in on the main board type.

PU-7 and PU-8 machines used either KSM-440AAM or KSM-440ACM
PU-18 and PU-20 used KSM-440ADM
PU-20 and PU-22 used KSM-440AEM
PSone used KSM-440BAM

You can freely interchange KSM-440AAM, KSM-440ACM and KSM-440BAM because the cables are the same

The KSM-440AEM will fit in machines that took the KSM-440AAM/ACM/BAM, but not the other way around.

They are all interchangeable using adapter cables.

One thing to be aware of is that the later machines (PU-20, PU-22, PSone) are much more tolerant of bad pickups than the earlier ones - so it's quite possible that a pickup might work OK in something like a PSone but not work in a machine with a PU-7 or PU-8 board.

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests