Hello, working on an iPad and there is no touch after replacing the battery even with 2 new screens. Need schematics so I can test the diode values on the FPC pins. Thanks
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Hello. I came across with the power supply constantly resetting on IPAD A1673.
(I connect it to USB power)
PMU U8100 is rising all voltages except PP3V3_S2 . Consequently, the SYS_ALIVE is also absent.
I have two identical boards with the same symptoms, and I think this is a common problem.
I also have a working board. I've taken all the measurements to compare and haven't seen any abnormalities. There are no signs of a short circuit or water damage.
VREF, IREF are also present.
I also couldn't find any PP3V3_S2 enable signals.
Please help me and suggest... -
I tried searching the forum for whether this has been uploaded already, but couldn't find them (as a collection).
Here's a dump of a bunch of iPads, I've split into 2 archives to get under file limit
IPAD COLLECTION 1
+---iPad mini1 820-3400(A1432) 820-3243(A1454?A1455)
+---iPad mini2 820-3683(A1489) 820-3684(A1490?A1491)
+---iPad mini3 820-00008(A1599) 820-00002(A1600)
+---iPad mini4 820-00180(A1538) 820-00177(A1550)
+---iPad mini5 820-01591(A2133) 820-01495(A2124?A2125?A2126)
+---iPad Pro 12.9-4-820-01797(A2229) 820-01798(A2069?A2232?A2233)... -
Dear reader
I am performing a repair on a Sony ICF-SW55, which includes recapping (some) of the SMD capacitors on the mainboard. I am looking for verification of their values. At the moment, I'm 95% sure I've got the right values, but it is hard to find some official, credible or multiple independant sources on this.
At the moment, I have selected replacements based on the following list of values:
3 x 470uF 10VDC
3 x 4.7uF 35VDC
4 x 47uF 50VDC
8 x 22uF 6.3 VDC
1 x 220uF 6.3VDC
5 x 100uF 6.3VDC
Which... -
I've found the bitmap .PCB file on this forum (although many things are wrong with it, such as inductors labeled as resistors or capacitors), but I can't find the schematic. Can anyone share it? Thanks.09-19-2025, 02:48 AM -
Hello.
Working on an Apple iPad Pro 3rd Generation 12.9" that has a weird issue. When the display is NOT connected, the iPad will charge and power on normally. I know it's on because I can hear notification sounds and the charging notification sound.
If I connect a brand new display to the logic board, the iPad will not turn on at all. When I connect the iPad to an 18W wall charger and a USB-C ammeter, I can see that the iPad is attempting to charge, but constantly "resets" after just a moment or two.
For example, when I connect the iPad to...