SCPH-1000 stuck on double speed mode
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~PSXLoVeR95~ Verified
- Active PSXDEV User
- Posts: 73
- Joined: Sep 18, 2016
- I am a: Huge lover of PS1
SCPH-1000 stuck on double speed mode
Hi fellas.
How are you?
I've an SCPH-1000 (serial 6323386 - CPU 14th week of '95) with an strange problem (I've repaired a lot of PS -- but this one is tough).
Laser replaced (KSM-440AAM --> KSM-440BAM), excellent RF signal (no jitter, stable RF envelope and 1.2v p-p), very fast reading, but when the console starts reading the SCEX, it stuck on double speed.
SUB-CPU recognized if the disc is original or not, CD-DSP it's working with a CD audio, BA looks fine...
Maybe a bad CD-XA encoder?
Here's a video:
[youtube][/youtube]
...And a pic of the RF signal:
Thank you and have a nice day!
P.S The unit is not modchipped!
UPDATE:
replaced the CD-XA encoder (CXD1189 --> CXD1815), CD-DSP, SUBCPU, RF AMP... same problem.
How are you?
I've an SCPH-1000 (serial 6323386 - CPU 14th week of '95) with an strange problem (I've repaired a lot of PS -- but this one is tough).
Laser replaced (KSM-440AAM --> KSM-440BAM), excellent RF signal (no jitter, stable RF envelope and 1.2v p-p), very fast reading, but when the console starts reading the SCEX, it stuck on double speed.
SUB-CPU recognized if the disc is original or not, CD-DSP it's working with a CD audio, BA looks fine...
Maybe a bad CD-XA encoder?
Here's a video:
[youtube][/youtube]
...And a pic of the RF signal:
Thank you and have a nice day!
P.S The unit is not modchipped!
UPDATE:
replaced the CD-XA encoder (CXD1189 --> CXD1815), CD-DSP, SUBCPU, RF AMP... same problem.
~ My PS Collection ~
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
It could be that the main cpu when issuing CD Commands is stuck waiting for a response that never comes. Getting stuck on that white screen could happen in that case. Maybe the CD-ROM Controller is bad or has a bad connection/cold solder joint?
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~PSXLoVeR95~ Verified
- Active PSXDEV User
- Posts: 73
- Joined: Sep 18, 2016
- I am a: Huge lover of PS1
Hello, thank you for the response.
I've replaced all the CD servo's IC. Nothing changed...
As you said, the CPU is bad. Because, if you force an STR playback, there a lot of square artifacts (bad MDEC decompression module).
So... for me, it's unrepairable.
SCPH-1000 have a different CPU from a 1001 or 1002. This makes me sooooo sad !
Here's a pic of the artifacts:
I've replaced all the CD servo's IC. Nothing changed...
As you said, the CPU is bad. Because, if you force an STR playback, there a lot of square artifacts (bad MDEC decompression module).
So... for me, it's unrepairable.
SCPH-1000 have a different CPU from a 1001 or 1002. This makes me sooooo sad !
Here's a pic of the artifacts:
~ My PS Collection ~
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
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- PlayStation Model: SCPH-1002
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I had the same issue and turned out it wouldn't work with one of my controllers so I switched controllers and reset and it was fine. Probably not the same thing but
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Last edited by aayushkm52 on January 9th, 2023, 6:54 pm, edited 2 times in total.
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~PSXLoVeR95~ Verified
- Active PSXDEV User
- Posts: 73
- Joined: Sep 18, 2016
- I am a: Huge lover of PS1
Hi guys... just a little update.
I've replaced the CPU with a compatible one (picked from an old SCPH-1002 - 208pin) and... NOTHING.
ALWAYS STUCK.
I really don't know what a kind of problem have this PlayStation... but, I don't get it T-T
Maybe the holy Trimesh can help me
I've replaced the CPU with a compatible one (picked from an old SCPH-1002 - 208pin) and... NOTHING.
ALWAYS STUCK.
I really don't know what a kind of problem have this PlayStation... but, I don't get it T-T
Maybe the holy Trimesh can help me
~ My PS Collection ~
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
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~PSXLoVeR95~ Verified
- Active PSXDEV User
- Posts: 73
- Joined: Sep 18, 2016
- I am a: Huge lover of PS1
GUYS... PROBLEM SOLVED!
IT WAS THE BIOS!
I replaced the BIOS with another from an SCPH-1002 and it works (SCPH-1000 use a 40 pin BIOS package). Probably it remains stucked because the code was incompleted or faulty during the SCEX check.
It's working flawlessy!
IT WAS THE BIOS!
I replaced the BIOS with another from an SCPH-1002 and it works (SCPH-1000 use a 40 pin BIOS package). Probably it remains stucked because the code was incompleted or faulty during the SCEX check.
It's working flawlessy!
~ My PS Collection ~
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
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Squaresoft74 Verified
- /// PSXDEV | ELITE ///
- Posts: 309
- Joined: Jan 07, 2016
- PlayStation Model: SCPH-7502
- Location: France
- Contact:
Congratz !
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~PSXLoVeR95~ Verified
- Active PSXDEV User
- Posts: 73
- Joined: Sep 18, 2016
- I am a: Huge lover of PS1
Thank you, mate !!!
You know a method to dump the BIOS chip with a programmer?
~ My PS Collection ~
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
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Squaresoft74 Verified
- /// PSXDEV | ELITE ///
- Posts: 309
- Joined: Jan 07, 2016
- PlayStation Model: SCPH-7502
- Location: France
- Contact:
If you have a serial cable, you can easily dump it from the console itself using Unirom/nops and this command for example:
Code: Select all
NoPS /dump 0xBFC00000 0x80000 bios.bin com3
I think he means he wants to dump the chip he pulled that was failing to boot the console, probably so he can verify that the BIOS chip is bad.
-
Squaresoft74 Verified
- /// PSXDEV | ELITE ///
- Posts: 309
- Joined: Jan 07, 2016
- PlayStation Model: SCPH-7502
- Location: France
- Contact:
Oops sorry, i didn't get it right and don't know then.
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~PSXLoVeR95~ Verified
- Active PSXDEV User
- Posts: 73
- Joined: Sep 18, 2016
- I am a: Huge lover of PS1
Yeah, my idea was to dump this bios and a make a comparison from a good one. I've an XGECU eeprom programmer, but I can't find a guide how to dump it :/
~ My PS Collection ~
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY
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Verified
- Extreme PSXDEV User
- Posts: 221
- Joined: Oct 21, 2021
- I am a: Programmer, Gamer
- PlayStation Model: SCPH-1000
- Location: USA
- Contact:
I had no idea that one can see the week that the CPU is manufactured, that is wonderful!~PSXLoVeR95~ wrote: ↑September 9th, 2022, 9:44 pmYeah, my idea was to dump this bios and a make a comparison from a good one. I've an XGECU eeprom programmer, but I can't find a guide how to dump it :/
I am working on compiling a list of what is inside each console going off of SN, i.e. BIOS v1.0, CDROM BIOS VC0A, SNXXXXXXX, SCPH-1000.
This is important because the CD Player Swap Trick (the only swap trick where you replace the real PS1 game disc when it is stopped with a backup CD-R) requires VC1A, VC0B, or VC0A CDROM BIOS versions.
Can you confirm that the CDROM BIOS is VC0B? All you need to do is run https://alex-free.github.io/tonyhax-international . You should still be able to use the CD Player Swap Trick even though you changed the BIOS version. You can use that to boot the Boot CD image, and it will tell us what the CDROM BIOS version is.
If you are up to it, I would love to know what the original BIOS version is of this console. Is it v1.0 (I think all 1000s are) or is tt v1.1?
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