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12.1 MP CMOS , 1/1.7" CCD image sensor with 6x IS optical zoom. Released in Oct 2007, PCB date code 29th week of 2007[[File:Canon-powershot-g9.jpg|none|thumb|Canon PowerShot G9|alt=]]A service manual with assembly diagram, but no schematic, can be found [https://elektrotanya.com/canon_powershot_g9.pdf/download.html on the internet].

Released in Oct 2007Technical details, PCB date code 29th week of 2007including firmware dumps, on the [[Filehttps:Canon-powershot-g9//chdk.jpg|none|thumb|Canon PowerShot fandom.com/wiki/G9CHDK Wiki]].

== Parts Identification ==[[File:Canon PowerShot G9 Main PCB Assembly Diagram.png|thumb|Assembly diagram of main PCB with component designators]]The following parts list references the component designators found in the assembly diagram from the service manual. The list is grouped based on the numbering scheme, with a guess on the function of each group. ===Main PCB=== ====CPU/DSP====IC1001 Canon '''Digic III''', and Elpida HB0010A17E-E DDR mobile RAM + NOR flash memory (package on package) IC1002, IC1003 JRC '''NJM2877''' LDO *Marking 7 14 71, 5-pin package IC1004 marking FA, 5-pin package, LDO? IC1005 Seiko S-817 series LDO? *Marking G8X, 4-pin package IC1006 Seiko S-817 series LDO? *Marking B9O, 4-pin package IC1007 Seiko Epson '''RX-4571LC''' real time clock *Marking E4571 SR1001 Landscape/portrait orientation sensor? Q1003, Q1010, Q1011 Toshiba '''RN4982FE''' NPN PNP Transistors with 10K Bias Resistors *Marking 6B, 6-pin package Q1005, Q1007, Q1008 Toshiba '''RN1902FE''' Dual NPN Transistors with 10K Bias Resistors *Marking XB, 6-pin package Q1012 Toshiba '''RN4984FE''' NPN PNP Transistors with 47K Bias Resistors *Marking 6D, 6-pin package D1001 Panasonic '''MA2S111''' Switching Diode *Marking A, 2-pin package (silver) D1002 Panasonic '''MA3S132E''' Dual Switching diodes *Marking MU, 3-pin package CN1001 flat flex to DC/DC PCB CN1002 flat flex to jog dial unit, TOP_M FPC CN1003 unpopulated/undocumented -> JTAG/Serial? (see below) CN1004 USB/digital CN1005 SD card holder SW1001 switch, battery cover open detect ====CCD Interface====IC2002, IC2003 JRC '''NJM2877''' LDO *5-bin package IC2004 marking 11 77 41, 6-pin package IC2005 Sony '''D4807GA''' analog frontend IC2006 marking AED3, 5-pin package IC2008 JRC '''NJM2877''' LDO *5-pin package IC2009 not populated *5-pin package CN2001 connector for image sensor assembly  ====Lens Motor Driver====IC3001 Toshiba '''TB6609FL''' motor driver? IC3002 Toshiba '''TB6552FNG''' Dual-Bridge Driver for DC Motors CN3001 flat flex to lens assembly (zoom, focus, aperture, etc.) ====Image Stabilization====IC3201 Renesas(?) '''R2J30504''' 725104 *CK4-1105: Canon part number?*Similar IC with part number R2J3050x was found in Sony W120, Canon PowerShot A3100 IS SR3201, SR3202 Murata '''ENC-03''' series, angular rate sensors *1x ENC-03RC-R and 1x ENC-03RD-R ====LCD Driver====IC4001 '''15019GB''' 7CR0G 070 LCD power? Driver? CN4001 LCD panel CN4002 LCD backlight ====Audio/Video====IC4501 Wolfson '''WM1400G''' Audio driver/Codec IC4502 JRC '''NJM2571''' Low Voltage Video Amplifier with LPF *Marking A51, 6-pin package IC4503 unpopulated CN4501 Microphone CN4502 A/V out ====Mystery====[[File:Canon PowerShot G9 IC502.jpg|thumb|Low resolution die image of mystery IC502]]The function of this section, and its main chip IC502 is unclear.  IC501 JRC '''NJM2877''' LDO *marking 7 12 62, 5-pin package IC502 the Mystery IC *Transparent package *The big black area of this IC looks like a light sensor. However, in the assembled camera, the chip is facing inwards towards the battery compartment. Q501 SOT23-6 marking FM ZD501 marking R, reverse biased ===Power PCB===IC601 FE '''7761R''' multi-output DC-DC power management controller IC691 Seiko S-817 series LDO? *Marking CUW, 4-pin package BAT691 Seiko Instruments MS614S 3V rechargeable Li-Ion battery CN601 battery connector CN651 flat flex to main PCB ===Top Camera Control FPC=== ====Button controls====CN251 to TOP_I FPC D251, D252, 254, D255 Panasonic '''MA4Z159''' Dual Switching Diodes *Marking M1B, 4-pin package D253 Panasonic '''MA3S132E''' Dual Switching diodes *Also 4x on rotary dial FPC*Marking MU, 3-pin package (silver) D? Panasonic '''MA2S111''' Switching Diode *1x rotary dial FPC*Marking A, 2-pin package (silver) ====Power? Flash?====Q581 Toshiba '''RN4984FE''' NPN PNP Transistors with 47K Bias Resistors *Marking 6D, 6-pin package 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>