Search pinouts for SAMSUNG SCH-U430

Having examined the phone, find contacts JTAG interface likely in the label keyboard.

Board view with a group of contacts

A schematic sketch pin layout on paper. Just need to check on the board of any “lock-jumpers.” They are usually performed as a resistance between the terminal  RTCK and TRST, missing a jumper to the conclusion TCK, just found the missing option build resistance between pin JTAG on the board and processor.

Schematically draw a group of contacts

Connect phone board with SPT Board through ground. Connect the SPT Board with a computer. Connect to a power source. Turn on the device, preferably in Emergency. Using the output TEST SPT Board in turns touching each of the proposed findings with the JTAG watching the behavior of the device.

Determination of the findings and or ps_hold reset by the "spear" method

If the power consumption is drop, which means either reset the device, or it off, note the output on paper and remove it from the “Search group”.

Schematically drawn contact with the "exception" pin

Deletion of the “Search group” all “critical” pins (ps_hold, reset) soldered in turn to the remaining findings of SPT Board beginning with the first order. Make sure the unit is turned on, you can start your search. If the hunt group present findings JTAG: TCK, TMS, TDO, TDI, TRST is Search Pinout Tool Kit will determine which of the of the conclusions consistent with pins of JTAG SPT Board. It also considers the processor ID CODE connected device.

Window after the definition of pinouts

Based on the correspondence be noted on paper pin assignment JTAG.

Schematically drawn pinout

Pinouts defined.

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