Hello Arfa!
I opened the unit to check the VFD module. Then I saw some jumpers
marked "service".
Those were shorted during insertion of mains cord, and the unit
started up correctly. Hmm....
The display looked fine, though I don't know if the power amp operates
properly..
Does the above tell you anything?
Best regards,
Steve
Not really, except if the display is now working correctly, then the VFD
supply module is not the cause of any problems. I'm not sure what you mean
about whether the power amp operates correctly or not. If the unit now
fully
powers, with no error indications, and the speakers produce sound, then
the
assumption would have to be that the power amp is indeed working correctly
??
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Arfa, sorry for making you confused.
I didn't check if the unit does output any sound yet...
I just wonder how the set could start as soon as I shorted the service
pins?
Does this clear any internal error codes or something?
I don't feel comfortable returning the unit to customer without
finding any problem, except
for shorting the service pins...
Do you know anything that can set or cause an "error-detect" to the
processor? Like dc from poweramp and such..
Regards,
Steve
I can't recall ever having come across such on this particular model series,
but I do recall having a Pioneer AV amp in for repair some time ago, which
had done exactly that, and locked an error code into its processor, which
permanently prevented it from powering, leaving just a flashing LED on the
front panel. I had to put in a call to Pioneer Technical in the end ( who
used to be absolutely excellent here in the UK - same two guys down there
for years - but their department is sadly gone now ). They told me a
button-push sequence that was required, and said that there was likely no
other problem, which as I recall, there wasn't. Have you got the unit's own
speakers in the shop with it, or are you using the shop test ones ? If you
don't have the customer's own speakers, and it seems to work ok over an
extended bench soak, I would give it back and tell them that it had an error
code locked into it, and that this might have been due to a surge or
micro-outage in their household supply, or might be due to a faulty speaker,
or bad wiring to the speakers. Might be worth giving them a call before you
declare it fixed, just to ask what, if any, the circumstances of failure
were. I find that when I do this, I often get an answer like " Oh yes, it
wouldn't come back on after someone put a digger through a cable out in the
road - didn't I mention that .... ? "
Arfa