Re: 8131A Error F500
开云体育Hi, Indeed, it seems that you have problems with hybrid amplifiers. I found the table showing the different values ??associated with the pins surrounding this hybrid. It is certain that a bad polarization will affect the hybrid, just like for the uPA204. ? If you have a chance to do it, I would like to know the different voltages and waveforms associated with the u203 upa204. Because for the moment, nothing suggests that u203 is OK, unless you have made new measurements and the signals are normal. ? ? Yves De?: [email protected] <[email protected]> De la part de vee-dub565 via groups.io ? Thanks for the info and simulation data. I will have a look at pin 2 and check. ? I actually switched focus to the 2nd unit which has the same E304 error and low output on channel 1. I checked the output of the transducer board and it measured the same as channel 2 (which does work). I then measured the output of the hybrid amplifier and it was much lower when compared to channel 2.? ? So it looks like that has a hybrid amplifier problem. Which is odd because E304 relates to the output of the transducer board. Output of the hybrid amplifier should trigger a different fault code ? ? Anyway, I tried swapping the hybrid over from the first unit... and I got no output at all then, same fault as the first unit. Swapped the hybrids back over again and got the low output fault back.? ? So I can only conclude at this point that both hybrid amplifiers are faulty. One with no output, and one with very low output.? ? I wondered if the one with no output is somehow shutting down the output of the transducer board. Some sort of protection kicking in because the symptoms transfer across when I swap the hybrids over. ? There is a UPA102G on the hybrid. It MIGHT be worth swapping this with another one.?? |