TP4 has no voltage

[lucky102190Participant]

I bought NCS314 HW v2.2 and installed the HW 2.0 firmware.
The leds flushed cycle colors, but tubes not flushed and sound test not worked.
I checked voltage TP1, TP2, TP3 was OK, but TP4 was no voltage.
I also checked parts’s voltage, L1 was 12V, but D9 was no voltage.
Is there a debugging procedure for the hardware? Anything that I can test and fix?

[Gra AfchKeymaster]

Hello.

Please use attached list of instructions to troubleshoot your assembly.
It seems like there is a problems with HV DC-DC converter.
Write back for further help if needed.

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Power LED light up,
But Tubes and dots not light.
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“180 Volts DC-DC converter do not work”:

– Check voltage at TP4* must be 180V.
– Check the external power supply connections to the Arduino.
– The power supply must be 12 VDC with a current of at least 1A.
– Check the connection between Arduino and Shield NCS314.
– The Shield takes power from Arduino on pin Vin – сheck the voltage at that pin (should be 11.3 – 12 volts).

Input voltage (under load) dropped below 11 volts:

– Check voltage at Test Point TP1* must be 11.3-12.5V
– Check voltage at Test Point TP2* must be 11.3-12.5V
– Try adjusting the voltage with a trimmer R56 (up to 170 – 180 volts)
– Check soldering quality of components: U6 (check the key), R53, R36, R61, R50, R56, R58, Q1, L1, D9. Also check key for U6 and polarity for D9.

[Author]

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