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[[File:Canon PowerShot G9 debug header.jpg|thumb|CN1003, a candidate for JTAG and/or serial debug]]
CN1003 unpopulated/undocumented -> JTAG/Serial?
*Located near to SD card holder*Multiple pads connected to test points*Pin-out likely same as documented [https://web.archive.org/web/20200302085303/https:/CN1003 unpopulated/nada-labs.net/2014/finding-jtag-on-a-canon-elph100hsundocumented -ixus115/ here].<syntaxhighlight lang="c"> TX - _ RX GND - _ 3.3VSHDN - _ N/C NJTAG/C - _ HALF_BAUD PD - _ ALT_BOOT PD - _ /TRST TDI - _ TMS TCK - _ TDO/OFF -</syntaxhighlight>Serial? (see below)
moved description of JTAG/UART connector to Hacking section
CN1002 flat flex to jog dial unit, TOP_M FPC
CN1004 USB/digital
Q582 ROHM '''2SK2715''' 10V drive N-Ch MOSFET
[[File:Canon PowerShot G9 debug header.jpg|thumb|Unpopulated connector CN1003, probably for JTAG and UART]]
== Hacking ==Unpopulated connector CN1003 located on back of main board * Candidate for JTAG and/or UART* Located near to SD card holder* Multiple pads connected to test points* Pin-out likely same as documented [https://web.archive.org/web/20200302085303/https://nada-labs.net/2014/finding-jtag-on-a-canon-elph100hs-ixus115/ here].<syntaxhighlight lang="c"> TX - _ RX GND - _ 3.3V SHDN - _ N/C N/C - _ HALF_BAUD PD - _ ALT_BOOT PD - _ /TRST TDI - _ TMS TCK - _ TDO /OFF -<br /syntaxhighlight>
