PLAYSTATION DOESN'T POWER UP.

9/18/2000 12:07:18 AMKIRKSTER

I have a playstation that has a bad trasistor which the oem part has been discontinued. The oem number is K2125 and the cross-reference doesn't even look like the original part. I've contacted the manufactor and they said that the part has been discontinued for sometime and they couldn't help me because their archive manuals are missing. So what I'm asking for is either a copy of the power supply schematic or a direct replacement part number for K2125. I appreciate any feedback.

9/18/2000 1:11:22 AMDean Huster

You might try reposting your request to the Gernsback forum for general electronics where there will be a lot of folks who are into Playstations. They're at:

http://www.gernsback.com

Click on "FORUMS" at the left side of the screen and then at the bottom of the next screen, click on "ELECTRONIC BENCH".

Dean

9/18/2000 10:39:44 PMJohn McPherson

If the replacement looks like a power transisor, and the original a TO-92, it is probable that it would be an acceptable substition.

If both transistors are power types, such as a TO-220, and the one you are replacing is a TO-166 type, they are acceptable design interchanges. It is fairly common to find that one manufacturer uses one case style, and another company a totally different case style. Perfect example are some vintage military spec'd transistors with mounting lugs, yet their cross reference number in the Sylvania cross reference is an ECG-102, which uses a small TO-92, or X-99 case.

If your replacement is a heavier duty unit, I would give it a try. If it is not right, the most likely worst case scenario is another dead transistor.

If you have the Sylvania/NTE replacement, it is the type 107, which uses the TO-92 case style,CBO is 30 volts, and CEO is 15 volts, and is rated at 50mA.

I would check to see if the transistor that this one is driving is okay. It may have axcessive leakage, and would allow excessive current to flow through the transistor that is currently bad. I qould also recommend changin out the electrolytic caps in the switching supply, as they may be testing okay in a static mode, but may be breaking down and shorting out when the power supply is in operation.

: I have a playstation that has a bad trasistor which the oem part has been discontinued. The oem number is K2125 and the cross-reference doesn't even look like the original part. I've contacted the manufactor and they said that the part has been discontinued for sometime and they couldn't help me because their archive manuals are missing. So what I'm asking for is either a copy of the power supply schematic or a direct replacement part number for K2125. I appreciate any feedback.

9/19/2000 10:09:37 PMJohn McPherson

Japanese industrial standard designs differ from those you will find in the US, or Canada. Most appearance differences mean little when you are comparing a Japanese transistor that resembles a tiny "chicklet" with squared edges. US designated as M-68, SP-92, or M-71 are just three examples that resemble Japanese standard design transistor packages. I personally have replaced numerous porcelain clad transistors made in Japan, that for all intents and purposes, looked like UHF types, yet they were replaced with mundane 2N3904, or 2N3906 types

Your concern would be very valid if the replacement was a TO-3 pakaged device to replace a TO-92 packaged device.

If heat is a concern, they do make clamp on style heat sinks for TO-92 packages.

: If the replacement looks like a power transisor, and the original a TO-92, it is probable that it would be an acceptable substition.

: If both transistors are power types, such as a TO-220, and the one you are replacing is a TO-166 type, they are acceptable design interchanges. It is fairly common to find that one manufacturer uses one case style, and another company a totally different case style. Perfect example are some vintage military spec'd transistors with mounting lugs, yet their cross reference number in the Sylvania cross reference is an ECG-102, which uses a small TO-92, or X-99 case.

: If your replacement is a heavier duty unit, I would give it a try. If it is not right, the most likely worst case scenario is another dead transistor.

: If you have the Sylvania/NTE replacement, it is the type 107, which uses the TO-92 case style,CBO is 30 volts, and CEO is 15 volts, and is rated at 50mA.

: I would check to see if the transistor that this one is driving is okay. It may have axcessive leakage, and would allow excessive current to flow through the transistor that is currently bad. I qould also recommend changin out the electrolytic caps in the switching supply, as they may be testing okay in a static mode, but may be breaking down and shorting out when the power supply is in operation.

:

: : I have a playstation that has a bad trasistor which the oem part has been discontinued. The oem number is K2125 and the cross-reference doesn't even look like the original part. I've contacted the manufactor and they said that the part has been discontinued for sometime and they couldn't help me because their archive manuals are missing. So what I'm asking for is either a copy of the power supply schematic or a direct replacement part number for K2125. I appreciate any feedback.

2/2/2002 11:15:11 AMDaniele Nocera

: I have a playstation that has a bad trasistor which the oem part has been discontinued. The oem number is K2125 and the cross-reference doesn't even look like the original part. I've contacted the manufactor and they said that the part has been discontinued for sometime and they couldn't help me because their archive manuals are missing. So what I'm asking for is either a copy of the power supply schematic or a direct replacement part number for K2125. I appreciate any feedback.

3/14/2002 7:10:53 PMalfonso hernandez

: I am from Venezuela and, I have the same problem with my PS but I don't know how to do to fix it, I can't find the remplacement chip, could you help me, please?: I have a playstation that has a bad trasistor which the oem part has been discontinued. The oem number is K2125 and the cross-reference doesn't even look like the original part. I've contacted the manufactor and they said that the part has been discontinued for sometime and they couldn't help me because their archive manuals are missing. So what I'm asking for is either a copy of the power supply schematic or a direct replacement part number for K2125. I appreciate any feedback.

1/14/2003 11:38:28 PMJuan Garrido

Que tal yo tuve el mismo problema sólo que en un sitio de internet conseguí un diagrama de una fuente similar,en el señalan el 2SK2718 y se indica que el transistor es un Mosfet canal-N, con un VDSS=900 V Drain Current=2A y PD=40 Watts. Lo sustituí por el MTP6N60E, con un VDss=600 Volts. Además cambie un capacitor electrolitico que va después del puente rectificador de 120 uF por uno de 100 uF ya que se había dañado. El playstation funciono en forma normal. Yo me canse de buscar el K2125 y nunca lo encontre. Creo que es`´a es la mejor solución.

:: I am from Venezuela and, I have the same problem with my PS but I don't know how to do to fix it, I can't find the remplacement chip, could you help me, please?: I have a playstation that has a bad trasistor which the oem part has been discontinued. The oem number is K2125 and the cross-reference doesn't even look like the original part. I've contacted the manufactor and they said that the part has been discontinued for sometime and they couldn't help me because their archive manuals are missing. So what I'm asking for is either a copy of the power supply schematic or a direct replacement part number for K2125. I appreciate any feedback.
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1/16/2003 12:25:52 PMJohn McPherson

Hi,
The transistor is a NPN silicon UHF/VHF amp, Osc, Mix, IF amp. CBO 35 volts, CEO 15 volts, EBO 3 volts, Max collector current 25ma, Max dissipation .250 Watts, Typical hfe is 20, operating frequency is 700Mhz, Usually packaged in a TO-98 package. This probably will not match the sony transistor in physical appearance, but as long as it fits, it should work fine.

The NTE part number is 107, but I do not know if that is a currently available number. It should have a number to replace it if it has been discontinued.

No information on the chip, chances are it was made on for Sony, so you would have to steal one from another Playstation.

:Que tal yo tuve el mismo problema sólo que en un sitio de internet conseguí un diagrama de una fuente similar,en el señalan el 2SK2718 y se indica que el transistor es un Mosfet canal-N, con un VDSS=900 V Drain Current=2A y PD=40 Watts. Lo sustituí por el MTP6N60E, con un VDss=600 Volts. Además cambie un capacitor electrolitico que va después del puente rectificador de 120 uF por uno de 100 uF ya que se había dañado. El playstation funciono en forma normal. Yo me canse de buscar el K2125 y nunca lo encontre. Creo que es`´a es la mejor solución.
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::: I am from Venezuela and, I have the same problem with my PS but I don't know how to do to fix it, I can't find the remplacement chip, could you help me, please?: I have a playstation that has a bad trasistor which the oem part has been discontinued. The oem number is K2125 and the cross-reference doesn't even look like the original part. I've contacted the manufactor and they said that the part has been discontinued for sometime and they couldn't help me because their archive manuals are missing. So what I'm asking for is either a copy of the power supply schematic or a direct replacement part number for K2125. I appreciate any feedback.
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1/16/2003 10:53:47 PMEdd

I wonder if it was noticed that this was about a year old post on the last activity ?
But I will throw in this info also:

Looks like that’s a power supply component and here’s the data on the (2S)K2125

http://katalogi.iele.polsl.gliwice.pl/upload/2SK2125.pdf

also, the 2SK2718 also seems to be a viable sub:
Or here’s what Juan mentioned............
en Ingles for the gringos:
“I also had the same problem, but on an Internet site, I obtained a diagram of a similar unit, in it they utilized the 2SK2718 and it is indicated that the transistor is a Mosfet channel-N, with a VDSS=900 V Drain Current=À and PD=40 Watts. I replaced it with the MTPN60E, with a VDss=600 Volts. In addition I changed an electrolytic capacitor (120 uF) that goes after the rectifying bridge. (I used one of 100 uF) Since it had been damaged also. The Playstation I now works normally. I got tired looking for the K2125 and never found it. I believe that this is the best solution.”

73’s de Edd

:: I am from Venezuela and, I have the same problem with my PS but I don't know how to do to fix it, I can't find the remplacement chip, could you help me, please?: I have a playstation that has a bad trasistor which the oem part has been discontinued. The oem number is K2125 and the cross-reference doesn't even look like the original part. I've contacted the manufactor and they said that the part has been discontinued for sometime and they couldn't help me because their archive manuals are missing. So what I'm asking for is either a copy of the power supply schematic or a direct replacement part number for K2125. I appreciate any feedback.
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