I have a PS5 that does not powerup, I have the 12 V rails in the appropriate places but no 5V or 3.3V in all the areas they are supposed to be in. I was wondering if anyone knew where the 5V rail is generated from, which section of the board?
Appreciate any input.
5v comes from big 1R0 inductor on left side HDMI IC
I checked voltages at the 1R0 and there is no 5v present. I checked for shorts on the two mosfets
and there is no presence of shorts. is it possible that the mosfets are the issue. I do not see any voltage on the gate side of the mosfet.
Any ideas what I check for ?
Do you have F7001 fuse on your board? what resistance to ground on 1R0 and F7001 right side(far from 1R0)?
I am measuring around 84K ohms
It starts around 400K and then continues to drop to 84K
fuse has continuity?
Yes…everything looks good from that standpoint.
any idea where the gate is tied to for the mosfet? it would need to be supposed voltage to operate?
The MOSFET gate ties to the 3219A chip under the 1R0 inductor. You have 12v comes to the MOSFET right?
Yes I have a strong 12 volts presence at the mosfet
Any idea what is happening here?
@Mike123 did you ever figure it out? I have the same issue. I had liquid metal at the lower mosfet, i cleaned everything but same issue. i tried replacing it from a donor board but same issue.
I would check the 3219A controller for the mosfet for correct readings as shown at the image.
The left most top pin on the mosfet needs 5.1V if the mosfet should output 5.1V.
From the image, I only have 12V and 2.8V. No other voltages are present on standby.
Is there any liquid metal left around the 3219A? If not, I guess the 3219A chip is bad.
There should be output because 12V input and 2.8V enable are present.
Thanks for your answer Calvin, much appreciated. The chip turned out to be bad. I swapped the chip and now I have 5.1v, 6.29v, 2.6v, 2.8v, but I dont get 5V on pin 16 and 5.072V. Further checking pin 16 measures 20 Ohms short to ground.
There is 5.1V on F7002 voltage regulator but the output 3.3v is missing. Any ideas where to look for?
If 5.1V are reaching the fuse F7002, the ciruits around the 3219A should be ok.
Are 5.1V on both sides of each fuse F7001, F7002 and F7003?
What is the board version? (edm-010, -020, -03x, …)
Yes 5.1V is present on each side of fuses F7001, F7002 and F7003.
Board version is edm-010.
The bug converter TLV62090 close to the fuse F7002 is the 3.3V source for the WiFi module. In most cases if the 3.3V are missing, the 3.3V line is shorted due to a failed cap on the backside of the WiFi module or the WiFi module itself.
I would check if the 3.3V isn’t shorted and if pin 13 (right side, first from down to top) has enable voltage.
