Benny,
Error E27 says that your filter board is not being recognized.
Turn the manual to the Troubleshooting Appendix in the rear , page 2 and
do the checks indicated in the E27 block.
Be certain all pins of the headers to the filter board are well soldered.
If the band board firmware (U1) is plugged in backwards, you will have
low voltage on pin 16 and the regulator will get hot. The notch on U1
must point toward the rear of the board.
73,
Don W3FPR
On 12/23/2014 5:01 AM, Benjamin Schmid wrote:
Hi everybody,
I'm currently in the middle of building my K1 #3343.
Right until now everything went just fine and it's been fun to build.
I'm at the point of the first power up and wanted to test the ATTN relay.
The LED comes on but there ist no relay clicking.
When hitting BAND I realized that band change wasn't possible and the TRX shows
E27.
The filter board is completely plugged in and seated correctly.
Off to the manual then. Have you tried turning it off an on again: yes.
No relay clicking on power up. Until then i thought that was normal.
I checked the orientation of Fil-U1. Its positioned correct and completely in the socket, no bent pins etc..
I checked the voltages of Fil-U1 everything within the specified range.
I checked some voltages at the MCU, not all yet, all within range or as
specified in the manual.
I read some older posts abt similar problems. I checked Fil-R1. It's the correct value and the solder joint seems good.
I followed the hole path of the aux bus signal from Fil-U1 Pin13 up to the MCU.
Resistance is just the 100ohm of Fil-R1.
I redid some solder connections on the way even though they looked good, as
well as all solders on all multi pin connectors.
On the FP-Board FP-RFC1 is the correct value, solder joints looks ok. (It's not
a resistor)
Kept reading some older posts and checked the coil resistance of all relays, all about the same resistance (not sure about the actual value right now) , soldering and position of all relays ok.
Right now i redid some voltage measurements.
I found out that the voltage at FIL-U1-16 is somewhat unstable. The first time
i measured it was well below 0.3V.
This time it was around 0.6 Volts, a couple seconds later around 1.3 V while
Pin 15 is at flat 0.0V as it was before.
Not sure what's that supposed to tell me. Did I fry Z1 while soldering? Or is it U1 itself causing the trouble?
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