strange tray problem--too fast

vliam · 09-05-2003,06:14 PM

I have a US v1 ps2. The serial starts with u0 so supposedly it is a v2 but it doesn't match any v2 diagram I have ever seen. It matches the v1 diagrams perfectly.

At any rate, until recently I have had a neo2 chip (with the pin2 capacitor) in it. I took it out in order to install a Messiah2 1.30. Before installing the Messiah, I tested the machine to make sure everything was okay. However, it's not.

Now the machine refuses to recognize cds. This is not a big deal. To be honest, I don't remember the last time that I played a cd game in it. Also, this could probable be fixed by a small adjustment of the laser.

The weirdest thing is the tray. I leave my machine in standby at all times. When the machine is first powered on, the tray will not open. After 1-2 seconds the tray will open/close slowly if you hit the eject button. If you wait for another 10 seconds and hit the eject button, the tray flies open/closed (much faster than normal). I found the exact same issue on another forum with a person using the neo2 mod but there were no replies.

My initial thought is that it much be a faulty capacitor somewhere on the board. One that is charging slowly and ultimately overcharging.

Might this be this case? And, if so, where should I start my search?

Vliam
Oh, and don't worry about frightening me with any suggestions. I've gotten quite adept with a soldering iron.

CN-Twat · 09-05-2003,06:45 PM

Check for a bridge or solder splash on the BA chip. This chip controls the eject retract funtion. This must have happened when you removed the NEO 2.x. Also make sure the heat sink pad is also on top of the chip to facilitate cooling.

vliam · 09-06-2003,03:51 PM

I checked the BA chip very carefully. It seems to be fine visually atleast. The pad is in place. It still seems to be doing it.

Is there anything else that might cause this? I checked the button wiring to make sure it wasn't pinched anywhere. I could spend a lifetime following the traces from the BA chip to the various smds on the board.

**ro4eva** · 09-06-2003,05:33 PM

i had the same problem when there was too much power going to/from the +5v connection... possibly something is bridged or a fuse blown around that are... i wish i could help u more

**ro4eva** · 09-06-2003,05:38 PM

.... but i cant

vliam · 09-07-2003,03:36 AM

hmm...good thought. I'll check into that. However, it still doesn't explain why it starts out at a slower speed and increases.

Maybe I should elaborate more. The speed depends on the amount of time that the machine is on. Initially, the tray won't even open. After half a second, it will open half way and then return. I have to wait for ~2 seconds before I hit the eject button for the tray to remain open. The speed steadily increases after that until it reaches a maximum(at which point it is flying open).

It probable isn't that big a deal. I just don't want to burn out the tray motor. Does anyone know how much voltage and current the tray motor normally operates on? If so, I could probably throw a resistor in it to drop the current max and save the motor. Even if that means I have to give the machine a "warmup" period of ten seconds.

jacuinde · 01-11-2004,05:50 PM

im a dumbass but can it be a capacitor?

**EnTiTy** · 01-11-2004,06:11 PM

Originally posted by jacuinde
im a dumbass but can it be a capacitor?

it can or a resistor

EnTiTy

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