Can someone help me with this? I have a PS4 pro. Disc drive does not work. Turns out F6202 AND F6201 are both blown. With the drive plus ribbon cables connected, there doesn’t seem to be any short to ground. Ohm reading is 3k-5k. Same when the drive is disconnected. However, the fuses themselves seem to be shorted together, on their downstream pins. (I believe downstream is right hand side, using the silkscreen for orientation reference). My motherboard model is NVA-001. Everything else works on the console. The short is restricted to the motherboard, as it still occurs when the disc drive is missing.
I don’t see a direct line from the fuses to any connector pins. I’m assuming these go through some sort of IC that could have the possibility of shorting 12V and 5V together (I’m assuming those voltages). Has anyone seen this before? Please correct me if I’m wrong about any part of this
F6201 and F6202 are both fed by 5V.
F6201 is the fuse for the BD7764 BD controller chip (pins 3/ 8/26) and fuse
F6202 for 3536C drive chip (pins 3/4/11).
F6001 is the 12V fuse on the backside.
That was super helpful. I knew the fuses were both blown, so I was trying to determine what type of event could blow both. Turns out I was looking at the wrong side for downstream of the fuses. So where I was seeing the short was just the 5V input. The top layer of copper made it look like they were separate nets.
I was able to verify everything that you told me, but it still begs the question, what would cause independent faults like these? I took apart the disc drive, and there isn’t any blockage. Using the manual adjustment screw, the drive appears to run its insert/remove cycle smoothly.
Has anyone seen this before? Is this a strange anomaly where somehow both fuses got blown on some transient event? Or is it likely that both downstream ICs are bad? Is it common for both to fail at the same time? I wouldn’t think so. If it was just one fuse that was blown I wouldn’t be scratching my head and hesitating this much. Do you think I should just go ahead and order replacement fuses and try it?
I would check the pins around the both chips for shorts.
(Readings are in resistance and diode mode with disc drive installed)
blue = 12V input pins, orange 5V input pins.
Thanks for the reply again. Is this type of information publicly available somewhere? It is extremely useful!
My drive chip is actually BD9685 7022. But my measurements indicate that is probably has the same pinout as the 356C.
I measured most pins. For values impedances <5M, my measurements were within 50%. This seems appropriate/not concerning to my untrained brain. I think above 5M, my multimeter might be getting spotty. Also, my diode measurements are all over the place, but I’m not sure it indicates a problem.
The only thing that I believe could be a real issue was pins 40/39 of BD7764 I measured having about a 2.5k path to chassis GND. F6001 and that blue 0805 package are sourcing these 12V pins. F6001 measures healthy. But I’m not sure how this would lead to a blown 5V fuse, plus another 5V fuse that shouldn’t come into contact with BD7764.
Would you have a theory as to why both F6202 and F6201 would both be blown at the same time? Is there a scenario where the drive chip and controller chip would fail simultaneously?
I made the readings myself. But other technicians have posted similar pin out readings.
Diode mode measurements values depends on the used multimeter. But with red on ground and black on the pad to measure it should show a similar direction.
If no shorts are present, I would replace the bad fuses at the 5V lines and see if it solve the issue.
I was measuring diode drop from pin→gnd, not the other way around. So that might explain it. OK. I will get some new fuses and see if that solves the issue. I will report back probably in a few weeks.
