SCPH-1002 PSU fuse continue to blow.

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~PSXLoVeR95~
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SCPH-1002 PSU fuse continue to blow.

Post by ~PSXLoVeR95~ » September 21st, 2016, 9:27 pm

Hi there!
I have a problem with my 1002 PSU (received yesterday...after try to repairing my 1000 :evil: ) and i resolder all the pads with a nice and fresh soldering but the fuse...still blow!
It's a EAMX5 aka NPX-029E1-1A (so a Matsushita PSU) and aestheticallyit's in good condition ....
Here some pic :

Image
Image
Probably the problem is in the live section, but i'm not sure :mrgreen: !
Thanks in advance !
~ My PS Collection ~
2 x SCPH-1000
13 x SCPH-1002
1 x SCPH-1001
1 x SCPH-5000
1 x SCPH-5500
4 x SCPH-5502
2 x SCPH-7000
1 x SCPH-7002
1 x SCPH-7500
5 x SCPH-7502
1 x SCPH-9000
1 x SCPH-102

>>IT'S A SONY

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Shadow
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Posts: 2454
Joined: December 31st, 2012, 5:37 pm
PlayStation Model: H2000/5502

Re: SCPH-1002 PSU fuse continue to blow.

Post by Shadow » September 21st, 2016, 9:29 pm

Did the fuse blow when the secondary side was turned off (not powering the PSX)?
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.

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~PSXLoVeR95~
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Re: SCPH-1002 PSU fuse continue to blow.

Post by ~PSXLoVeR95~ » September 21st, 2016, 9:55 pm

Hi shadow :) !
Well, the fuse blow when i just plugged the AC cable. the PSU isn't plug with the motherboard yet :/...
I've only two 250v 1.6AH fuse.... :(
So, i've only two chances XD
~ My PS Collection ~
2 x SCPH-1000
13 x SCPH-1002
1 x SCPH-1001
1 x SCPH-5000
1 x SCPH-5500
4 x SCPH-5502
2 x SCPH-7000
1 x SCPH-7002
1 x SCPH-7500
5 x SCPH-7502
1 x SCPH-9000
1 x SCPH-102

>>IT'S A SONY

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Shadow
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Posts: 2454
Joined: December 31st, 2012, 5:37 pm
PlayStation Model: H2000/5502

Re: SCPH-1002 PSU fuse continue to blow.

Post by Shadow » September 22nd, 2016, 3:43 pm

The transformer could be bad or the choke could be bad. It could also be the primary filtration capacitors. You'll have to get a multi-meter and start testing components because that's the only way you'll figure out where the short is occurring.
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.

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~PSXLoVeR95~
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Posts: 48
Joined: September 18th, 2016, 1:32 am

Re: SCPH-1002 PSU fuse continue to blow.

Post by ~PSXLoVeR95~ » September 23rd, 2016, 12:40 am

Yeaaah Shadow, i did it!!!
I just check the FS2KM (high speed MITSUBISHI MOSFET) beacause was in short and change the main capacitor for safety (400V 47uf). It works perfectly :)!
But on the pinout i have 7,0vdc and not 7,5vdc...the console working fine but i'm don't know if it's normal XD!
~ My PS Collection ~
2 x SCPH-1000
13 x SCPH-1002
1 x SCPH-1001
1 x SCPH-5000
1 x SCPH-5500
4 x SCPH-5502
2 x SCPH-7000
1 x SCPH-7002
1 x SCPH-7500
5 x SCPH-7502
1 x SCPH-9000
1 x SCPH-102

>>IT'S A SONY

User avatar
Shadow
Admin / PSXDEV
Admin / PSXDEV
Posts: 2454
Joined: December 31st, 2012, 5:37 pm
PlayStation Model: H2000/5502

Re: SCPH-1002 PSU fuse continue to blow.

Post by Shadow » September 23rd, 2016, 2:35 am

~PSXLoVeR95~ wrote:Yeaaah Shadow, i did it!!!
I just check the FS2KM (high speed MITSUBISHI MOSFET) beacause was in short.
But on the pinout i have 7,0vdc and not 7,5vdc...the console working fine but i'm don't know if it's normal XD!
Ah, it would have been the FET. Make sure you put the heatsink back on it!

There is a pot you can adjust on the secondary side to calibrate the voltage.
I think the older 1000 series PSU's outputted a lower 7V rail anyway.
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
~PSXLoVeR95~
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Posts: 48
Joined: September 18th, 2016, 1:32 am

Re: SCPH-1002 PSU fuse continue to blow.

Post by ~PSXLoVeR95~ » September 23rd, 2016, 4:36 am

Aye :)
Heatsink + a little of thermal paste, but just a little :)!
Ah okay, now i know what is that pot....i leave for that voltage.
For curiosity, what happen if i reduce too much the voltage of PSU in DC?
Thanks !
~ My PS Collection ~
2 x SCPH-1000
13 x SCPH-1002
1 x SCPH-1001
1 x SCPH-5000
1 x SCPH-5500
4 x SCPH-5502
2 x SCPH-7000
1 x SCPH-7002
1 x SCPH-7500
5 x SCPH-7502
1 x SCPH-9000
1 x SCPH-102

>>IT'S A SONY

User avatar
Shadow
Admin / PSXDEV
Admin / PSXDEV
Posts: 2454
Joined: December 31st, 2012, 5:37 pm
PlayStation Model: H2000/5502

Re: SCPH-1002 PSU fuse continue to blow.

Post by Shadow » September 23rd, 2016, 3:16 pm

The PSX regulators will fail to switch states and it simply won't power on.
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
~PSXLoVeR95~
Active PSXDEV User
Active PSXDEV User
Posts: 48
Joined: September 18th, 2016, 1:32 am

Re: SCPH-1002 PSU fuse continue to blow.

Post by ~PSXLoVeR95~ » September 23rd, 2016, 9:35 pm

Interesting, shadow! :)
It's a shame that the other power supplies doesn't have this pot :(
~ My PS Collection ~
2 x SCPH-1000
13 x SCPH-1002
1 x SCPH-1001
1 x SCPH-5000
1 x SCPH-5500
4 x SCPH-5502
2 x SCPH-7000
1 x SCPH-7002
1 x SCPH-7500
5 x SCPH-7502
1 x SCPH-9000
1 x SCPH-102

>>IT'S A SONY

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