Differences

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--- issues [2015/07/06 21:29] – created rfguy
+++ issues [2015/12/31 19:36] (current) – [Solutions] liooo
@@ Line 1: / Line 1: @@
-== Known Issues Version 2015-06-23 (What you get on CCCamp)
+= Known Issues Version 2015-06-23 (What you got on CCCamp)
-=== Power off from WS2811b Leds not working
+== Powering off the WS2811b LEDs is not working
-During a mistake on late day, the power off transitors for three LEDs groups are not working (T801-803)
+Due to a mistake late in the day, the power off transistors for three LED groups are not working (T801-803).
-Solder 0 resistors there and disconect battery to power off the badge (Leds are consuming 0.5 mA in stand by)
+Solder 0 Ohm resistors there and disconnect the battery to power off the badge (otherwise, the LEDs are consuming 0.5 mA in stand by)
+== The display is powered on, but no text is displayed while booting
+see https://rad1o.badge.events.ccc.de/troubleshooting
+I've heard this happened with ~10 new devices, but mine also went black the next day (cxcv).
+This bug(?) appears on all devices at the same time but not all the time. on 2015-08-13 11:00 It worked, 2015-08-13 15:20 it went black again for the hackrf firmware. (f0086)
+Talked to the supporters, issue is related to power supply and they are working on a software fix (cxcv)
+Replacing the display fixed this for me (cxcv)
+My display did also not show text. Sometimes other troubles as well and rad1o not really useable. Enabling VDD on RF (all the time) solved it temporarily. TX was too low and I found a bridge between VDD and RF1 below IC402. Resoldering it solved my issue. There should be no DC on the RF lines. Check DC voltages around the RF switches.
+== Missing high-pass filter
+There is no high-pass filter populated (FL301) because of the cost. You can't transmit or receive above 2.75 GHz without modifications.
+=== Solutions
+  * Populate the high pass (for part number see schematic)
+  * Bridge the high-pass and add an external filter\\
+For RX, a bridge on the high pass should be OK\\
+{{:missing_high_pass_fl301.png?200|}}