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* Original info kindly provided by l_oliveira
* All info kindly provided by l_oliveira


= How to Enter Service Mode (officially known as Manufacturing Mode) on PSP Go =
= How to enter Manufacturing Mode on Psp Go (Partial) =


Connecting a PSP Go multi-use connector plug to a TTL serial adapter:
* Pins 20, 21 and 24 connected together. 14 is tx (from psp to host) and 17 is rx (from host to psp)
* Pin 24 connected to any ground (see pin-out below for ground pins)
* Feed 5V to pin 22 (But it will work on battery power without it just fine)
* Pins 14 and 17 connected together for k-line communication with your favorite 1.8v level serial adapter
* Serial adapter must have a 1n4148 diode with line (cathode) toward it's TX, other end (anode) tied to RX, and RX going to Go pins 14+17
* Ground connected between Go and serial adapter
* (optional) Pin 20 with 10K resistor to 5v power source and pin 22 directly connected to 5v power source


Plug in your serial adapter to PC and set up [https://github.com/khubik2/pysweeper PySweeper] with the correct COM port for your adapter and the option for service mode selected. Plug in modified multi-use connector to PSP Go while fully powered off (NOT in sleep mode), SYSCON will begin serial communication with your serial adapter and enter service mode.
= Explanation =


= Explanation of Pins used for Service Mode  =
* Pin 20 Makes it think it's on cradle with 5v psp adapter conected
* Pin 21 Makes it detect a cable is on
* Pin 24 tied to the other 2 enables serial


* Pin 14 is PSP Go TX
= Full MultiCn pinout =
* Pin 17 is PSP Go RX
* Pin 24 is SYSCON TOH0, enables serial communication when grounded
* Pin 20 is Cradle Power Detect, enables charging/power from pin 22
* Pin 22 is 5v in
 
= Full Multi-use Connector Pin-out =


<pre>
<pre>
01- GND
01- GND
02- ACCESSORY_USB_SUPPLY_3V3 (Used on N440 Converter Cable Adapter to power USB accessories)
02- ACCESSORY_USB_SUPPLY_3V3
03- EXTERNAL_MIC_IN
03- EXTERNAL_MIC_IN
04- POMMEL BALL M1 (?)
04- POMMEL BALL M1 (?)
05- AUD_L
05- AUD_L
06- Backlight IC ball C1 (ext mic en?)
06- Backlight IC ball C1 (ext mic en?)
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12- GND
12- GND
13- Pr / COMPOSITE_VIDEO
13- Pr / COMPOSITE_VIDEO
14- CABLE_TYPE_SENSE_1 (Used in jigkick as TX)
14- CABLE_TYPE_SENSE_1 (Used in jigkick) (TX)
15- CABLE_TYPE_SENSE_2
15- CABLE_TYPE_SENSE_2
16- Y / S-VIDEO_Y
16- Y / S-VIDEO_Y
17- Backlight IC ball D4 (Used in jigkick as RX)
17- Backlight IC ball D4 (Used in jigkick) (RX)
18- Backlight IC ball B2
18- Backlight IC ball B2
19- Cb / S-VIDEO_C
19- Cb / S-VIDEO_C
20- DET_5V_CRADLE (Apply +5v through 10kOhm resistor to enable pin 22)
20- DET_5V_CRADLE (yellow jack) (Used in jigkick)
21- DET_USB_CABLE_CONNECTED
21- DET_USB_CABLE_CONNECTED (Used in jigkick)
22- 5V_INPUT (Apply +5v when enabled to charge battery or power board if no battery)
22- 5V_INPUT
23- Backlight IC ball A6
23- Backlight IC ball A6
24- SYSCON_TOH0 (Ground while powered off to enable jigkick)
24- SYSCON_T0H0 (Used in jigkick)
25- GND
25- GND
26- USB_D+
26- USB_D+
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<gallery>
<gallery>
File:GPEHSYqW8AAD6oC.jpg
File:Photo_2023-08-16_19-32-24.jpg
File:Photo_2023-08-16_19-32-24.jpg
File:Photo 2023-08-15 20-56-16.jpg
File:Photo 2023-08-15 20-56-16.jpg
File:IMG_20230817_010900~.jpg
File:IMG_20230817_011428~.jpg
File:IMG_20230817_012031~.jpg
File:PSP Go Baryon Sweeper Hardware.png
File:PSP Go Baryon Sweeper Hardware.png
</gallery>
</gallery>


* For pin numbering on cradle multi-use connector plug with text upside down:
* TO COUNT DO:


<pre>
<pre>
1  4  7  ...
1  4  7  ...
gap in pins here
3  6  9  ...
  3  6  9  ...
2  5  8  ...
2  5  8  ...
</pre>
</pre>
= Alternative Points =
<gallery>
File:photo_2023-08-24_16-23-56.jpg
</gallery>
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