X728: Difference between revisions

(9 intermediate revisions by 4 users not shown)

Line 157:

* Power via DC5521 Jack of X728, 5.1Vdc +/-5% , ≥4A (DC5525 Jack is compatible with DC5521, also support 5V PSU with DC5525 Jack)

* Power via USB Type-C port of X728, 5.1Vdc +/-5% , ≥3A (Geekworm Type-C 5V 4A 20W power supply is recommended.）

==User manual==

* [[X728-script]]: This is script installation tutorial for X728 shield

* [[x728-hardware]]: Provides some hardware parameter information.

==Packing List==

* X728 Expansion Board x 1

* Screw M2.~~5 *5mm~~ x 8

* Screw M2.5x5mm x 8

* Spacer M/F M2.~~5 *20mm~~ x 4

* Spacer M/F M2.5x20+6mm x 4

* Spacer F/F M2.~~5 *20mm~~ x 4

* Spacer F/F M2.5x20mm x 4

* Jumper link Pitch 2.54mm x 2

[[File: IMG-0449-Packing-List.jpg|600px]]

~~==User manual==~~

* [[X728-script]]: This is script installation tutorial for X728 shield

* [[x728-hardware]]: Provides some hardware parameter information.

==X728-C1==

Line 187:

==X728-A1==

<span style="color:red;font-weight:bold">X728-A1 Optional Raspberry Pi cooling fan</span>

<span style="color:red;font-weight:bold">X728-A1 Optional Raspberry Pi cooling fan</span>（'''Discontinued'''）

* Completely solve the overheating problem of your Raspberry Pi

* Efficient drop temp of your Raspberry Pi by using the X728-A1

Line 200:

==X728-A2==

<span style="color:red;font-weight:bold">X728-A2 Optional 18650 2-Cell battery holder</span>

<span style="color:red;font-weight:bold">X728-A2 Optional 18650 2-Cell battery holder</span>（'''Discontinued'''）

* Stackable 18650 two cells lithium Ion holder

* Ideal solution to increase battery capacity

Line 332:

Q12: Simulate power outage and reconnection scenario. Why does the Raspberry Pi fail to ~~reboot~~ after unplugging and reconnecting the power supply?

Q12: Simulate power outage and reconnection scenario. Why does the Raspberry Pi fail to auto boot after unplugging and reconnecting the power supply?

</div>

A: ~~The~~ Raspberry Pi fails to ~~reboot~~ after power reconnection due to '''<span class="tb_red">incomplete power discharge</span>'''.

A: In the process of X728 auto power-on test, the Raspberry Pi fails to auto boot after power reconnection due to '''<span class="tb_red">incomplete power discharge</span>'''. This issue usually occurs when cutting power by unplugging the power adapter, while it will not happen if you disconnect the USB port directly.

:'''1. Cause'''

:~~Onboard capacitors hold residual~~ power after ~~power~~ disconnection, ~~leaving~~ voltage at the X728 input terminal. ~~Instant reconnection cannot~~ fully ~~break~~ the ~~power~~ circuit, so the ~~reboot mechanism will not~~ be ~~activated~~.

:Residual charge remains in the power adapter after disconnection, keeping voltage present at the X728 input terminal. Reconnecting power immediately fails to fully cut off the circuit, hence the auto power-on function cannot be triggered.

:'''2. Discharge Completion Check (refer to the picture)'''

:~~Discharge duration differs among power adapters.~~ Measure voltage on X728 input pads; the ~~power~~ is ~~fully discharged~~ when ~~the~~ voltage ~~drops~~ to zero~~. It generally~~ takes ~~about 20~~ seconds.

:Measure the voltage on the X728 DC jack input pads. The auto power-on function will be invalid if the reading is non-zero. Full discharge is achieved when voltage falls to zero, which usually takes more than 30 seconds. Discharge time varies depending on different power adapters.

:[[File:X728-FAQ.jpg|700px]]

~~:'''3. Operating Steps'''~~

~~::3.1 Cut off the external power supply~~

~~::3.2 Stand by until input pad voltage reaches zero (Better wait several extra seconds)~~

~~::3.3 Reconnect power, the Raspberry Pi will reboot automatically as normal~~

</div>

<~~comments~~ />

<comment-streams id="main" />

[[Category:Product Manual]]

[[Category:Raspberry pi]]

@@ Line 157: / Line 157: @@
 * Power via DC5521 Jack of X728, 5.1Vdc +/-5% , ≥4A (DC5525 Jack is compatible with DC5521, also support 5V PSU with DC5525 Jack)
 * Power via USB Type-C port of X728, 5.1Vdc +/-5% , ≥3A (Geekworm Type-C 5V 4A 20W power supply is recommended.）
+==User manual==
+* [[X728-script]]:  This is script installation tutorial for X728 shield
+* [[x728-hardware]]:  Provides some hardware parameter information.
 ==Packing List==
 * X728 Expansion Board	x 1
-* Screw M2.5 *5mm	x 8
+* Screw M2.5x5mm	x 8
-* Spacer M/F M2.5 *20mm	x 4
+* Spacer M/F M2.5x20+6mm	x 4
-* Spacer F/F M2.5 *20mm	x 4
+* Spacer F/F M2.5x20mm	x 4
 * Jumper link Pitch 2.54mm x 2
 [[File: IMG-0449-Packing-List.jpg|600px]]
-==User manual==
-* [[X728-script]]:  This is script installation tutorial for X728 shield
-* [[x728-hardware]]:  Provides some hardware parameter information.
 ==X728-C1==
@@ Line 187: / Line 187: @@
 ==X728-A1==
-<span style="color:red;font-weight:bold">X728-A1 Optional Raspberry Pi cooling fan</span>
+<span style="color:red;font-weight:bold">X728-A1 Optional Raspberry Pi cooling fan</span>（'''Discontinued'''）
 * Completely solve the overheating problem of your Raspberry Pi
 * Efficient drop temp of your Raspberry Pi by using the X728-A1
@@ Line 200: / Line 200: @@
 ==X728-A2==
-<span style="color:red;font-weight:bold">X728-A2 Optional 18650 2-Cell battery holder</span>
+<span style="color:red;font-weight:bold">X728-A2 Optional 18650 2-Cell battery holder</span>（'''Discontinued'''）
 * Stackable 18650 two cells lithium Ion holder
 * Ideal solution to increase battery capacity
@@ Line 332: / Line 332: @@
 <div class="toccolours mw-collapsible mw-collapsed">
 <div style="font-weight:bold;line-height:1.0;">
-Q12: Simulate power outage and reconnection scenario. Why does the Raspberry Pi fail to reboot after unplugging and reconnecting the power supply?
+Q12: Simulate power outage and reconnection scenario. Why does the Raspberry Pi fail to auto boot after unplugging and reconnecting the power supply?
 </div>
 <div class="mw-collapsible-content">
-A: The Raspberry Pi fails to reboot after power reconnection due to '''<span class="tb_red">incomplete power discharge</span>'''.
+A: In the process of X728 auto power-on test, the Raspberry Pi fails to auto boot after power reconnection due to '''<span class="tb_red">incomplete power discharge</span>'''. This issue usually occurs when cutting power by unplugging the power adapter, while it will not happen if you disconnect the USB port directly.
 :'''1. Cause'''
-:Onboard capacitors hold residual power after power disconnection, leaving voltage at the X728 input terminal. Instant reconnection cannot fully break the power circuit, so the reboot mechanism will not be activated.
+:Residual charge remains in the power adapter after disconnection, keeping voltage present at the X728 input terminal. Reconnecting power immediately fails to fully cut off the circuit, hence the auto power-on function cannot be triggered.
 :'''2. Discharge Completion Check (refer to the picture)'''
-:Discharge duration differs among power adapters. Measure voltage on X728 input pads; the power is fully discharged when the voltage drops to zero. It generally takes about 20 seconds.
+:Measure the voltage on the X728 DC jack input pads. The auto power-on function will be invalid if the reading is non-zero. Full discharge is achieved when voltage falls to zero, which usually takes more than 30 seconds. Discharge time varies depending on different power adapters.
 :[[File:X728-FAQ.jpg|700px]]
-:'''3. Operating Steps'''
-::3.1 Cut off the external power supply
-::3.2 Stand by until input pad voltage reaches zero (Better wait several extra seconds)
-::3.3 Reconnect power, the Raspberry Pi will reboot automatically as normal
 </div>
 </div>
 <!--增加评论功能！ -->
-<comments />
+<comment-streams id="main" />
 [[Category:Product Manual]]
 [[Category:Raspberry pi]]