D5100Hardware

= Connector to dials, on-off button, etc. = If we define the pinout as follows:



Pins were traced on the motherboard and here are the connections:

1 to Toshiba's J16 pin "PG5/KEY05" (through a discrete component, possibly a decoupling capacitor) but also to some pads next to the connector (pull-up resistor ?)

2 to the Nikon chip marked NHHS-2 close to the card reader

3 to one of the 2 terminals of the component marked "121" next to the Nikon chip above, then to two of its pins

4 to the Nikon chip marked NHHS-2 close to the card reader

5 to Toshiba's D15 pin "PH3/INT1B/TBAIN1" (plus a large via that doesn't seem to go anywhere)

6 ? reaches a dead-end in layer 3... large track though... strange.

7 to Toshiba's D6 pin "PF6/KEY22/TCOUT6"

8 to Toshiba's E6 pin "PF7/KEY23/TCOUT7"

9 goes to an Expeed pin through a discrete component (resistor, capacitor), and maybe ? links to a ground plane in layer 7

10 goes through a 3 discrete component schema (filter ? divider ?)

11 goes to one pin of the middle 235 SE chip (or 235 X2 depending on the motherboard). Same logic as pin 20.

12 reaches a thicker track that goes to a 3-pin component also connected to pin T10 "P26/A22/A6/TB5IN0" of the Toshiba and to the 6-pin chip between the QR code and the Nikon NHHS-2. Probably a power supply.

13 to Toshiba's E14 pin "PH2/INT1A/TBAIN0"

14 to Toshiba's A8 pin "PE1/KEY09"

15 to Toshiba's T17 pin "P57/A7/TB3OUT/KEY29"

16 N/C

17 to Toshiba's U16 pin "P56/A6/TB2OUT/KEY28"

18 to Toshiba's B13 pin "PA0/INT0/PHC0IN0", and to a discrete component (resistor, capacitor) just above the Toshiba.

19 connected to pin 12. Probably a power supply.

20 goes to one pin of the top 235 SE chip (or 235 X2 depending on the motherboard). Same logic as pin 11.

21 to Toshiba's J15 pin "PG6/KEY06"

22 GND

23 GND

24 to Toshiba's B6 pin "PF4/KEY20/TCOUT4"

25 to Toshiba's C6 pin "PF5/KEY21/TCOUT5"

26 same as pin 6

27 to Toshiba's T12 pin "P44/SCOUT"

28 to the Nikon chip marked NHHS-2 close to the card reader, through a discrete component (resistor, capacitor)

29 to the Nikon chip marked NHHS-2 close to the card reader, as well as to 2 discrete components (one 2-pin, one 3-pin)

30 to the Nikon chip marked NHHS-2 close to the card reader

31 to Toshiba's K3 pin "PB3/TB7OUT"