May 13th, 2017, 7:10
[ 7852.284225] usb 3-1: new full-speed USB device number 6 using xhci_hcd
[ 7852.396267] usb 3-1: device descriptor read/64, error -71
[ 7852.612203] usb 3-1: device descriptor read/64, error -71
[ 7852.828138] usb 3-1: new full-speed USB device number 7 using xhci_hcd
[ 7852.940218] usb 3-1: device descriptor read/64, error -71
[ 7853.156152] usb 3-1: device descriptor read/64, error -71
[ 7853.372097] usb 3-1: new full-speed USB device number 8 using xhci_hcd
[ 7853.372320] usb 3-1: Device not responding to setup address.
[ 7853.576274] usb 3-1: Device not responding to setup address.
[ 7853.780051] usb 3-1: device not accepting address 8, error -71
[ 7853.892047] usb 3-1: new full-speed USB device number 9 using xhci_hcd
[ 7853.892256] usb 3-1: Device not responding to setup address.
[ 7854.096240] usb 3-1: Device not responding to setup address.
[ 7854.300034] usb 3-1: device not accepting address 9, error -71
[ 7854.300133] usb usb3-port1: unable to enumerate USB device
May 13th, 2017, 8:30
May 13th, 2017, 8:55
unknown wrote:Find a compatible SATA PCB and transfer ROM's(IC602) then connect it directly via SATA interface.
May 13th, 2017, 11:19
There are 4 capacitors and 2 parallel Tx/Rx traces at about 2 o'clock to the bridge IC, above the "IC607" circuit reference (DSC03837.JPG). If you would like to convert your PCB to SATA mode, then remove these capacitors and wire your SATA cable to the MCU side.
May 13th, 2017, 16:43
May 13th, 2017, 17:05
Thanks for repliesfzabkar wrote:Check the following voltages:
May 13th, 2017, 17:07
May 13th, 2017, 17:18
May 13th, 2017, 18:09
fzabkar wrote:Edit: Sorry, I just saw your latest post. Don't bother with this test.
fzabkar wrote:Measure the voltage on the bridge side of the inductor. Also measure the resistance of the inductor (with power off), and the resistance of the capacitor (between Vcore and ground). It may be an idea to reflow the solder joints at the inductor and/or capacitor.
May 13th, 2017, 18:13
May 13th, 2017, 18:31
fzabkar wrote:Assuming your measurements have been done correctly, then ISTM that the bridge IC is dead. If you are unable to transfer IC602 to your donor, then PCB suppliers such as hdd-parts.com will do it for free. Good luck.
May 14th, 2017, 16:31
May 14th, 2017, 17:44
May 14th, 2017, 20:00
May 15th, 2017, 4:48
fzabkar wrote:I'm not a DR professional, but when assessing compatibility, you need to match the MCU and motor controller ICs, AIUI.
fzabkar wrote:I would measure the voltage pins - 10, 12, 13, 16, 24, 27, 33, 34, 37-40. I would probe the external components rather than the IC's pins (less risk of shorts).
Pin 41 (RESET_) should be high in normal operation. If Vcore is below 0.9V, then the internal reset logic pulls this pin low. This pin can also be connected to an external reset generator. The 4-pin IC near pin #1 of the bridge could be a reset supervisor. I would measure the reset pin (41).
RolandJS wrote:"...on linux machine if I do "dmesg" on terminal..." I'm a beginner; can this command by done by a Puppy Linux usb or dvd boot?
May 27th, 2017, 16:45
fzabkar wrote:Here is a pinout diagram for the VL711:
I would measure the voltage pins - 10, 12, 13, 16, 24, 27, 33, 34, 37-40. I would probe the external components rather than the IC's pins (less risk of shorts).
Pin 41 (RESET_) should be high in normal operation. If Vcore is below 0.9V, then the internal reset logic pulls this pin low. This pin can also be connected to an external reset generator. The 4-pin IC near pin #1 of the bridge could be a reset supervisor. I would measure the reset pin (41).
May 27th, 2017, 17:40
May 27th, 2017, 18:36
fzabkar wrote:I don't understand why the Reset pin is high when the Vcore is low. I also don't understand why your Vcore measurement of 0.69V differs from the VDD12 voltages (~ 0.5V).
Which location are you using as your 0V reference?
May 29th, 2017, 15:25
May 29th, 2017, 17:42
fzabkar wrote:If the voltage across C317 (Vcore) is 0.69V rather than 1.2V, then ISTM that the bridge must be faulty, despite the high level on the Reset pin. ISTM that a PCB swap plus firmware transfer would be worth a try.
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