had an issue where it would start and then shut down..
" while running MCACC appeared to be associated with it.
It was replaced and as far as I know, there haven't been any problems.. (will modify when aseer confirms status)
Ray, who owns an independent custom A/V install company for last 18 years or so and pro audio before that says humming may indicate a problem:http://www.avsforum.com/avs-vb/showt...65post16317065http://www.avsforum.com/avs-vb/showt...2#post16316912
In a attempt to offer information I'll include this:
One member, dm233 who had the MCACC LED flashing problem,
Posted a fix (UNVERIFIED
) in another thread...
when attempting this and perform at your own risk:http://www.avsforum.com/avs-vb/showt...7#post16747267
Updates: last updated 7/14/09
Resetting your SC-05/07 - USE CAUTION
flashing red MCACC light amp error
Had this happen to me on a barely 3 month old sc-07 and after reading all
the posts in the forum on the issue was a bit dismayed on the way to
resolve it by sending it in for service...
so after some research and digging into the issue the error is from a failure
in the amp block or high DC output is detected during a power-on
sequence after high DC output was once detected, "AMP ERR" appears
on the display and the MCACC light starts flashing and the receiver's
shutdown process will start
use at your own risk, as i am not a qualified/trained service tech, nor do i
pretend to be one, but information wants to be free... this may or may not
work in all situations and may even damage the components further...
may void your warranty in addition to any other legal disclaimer that may
you can "release" the error by pressing the "down arrow" and the "zone 2
on/off" for 2 seconds
if the error comes back then more than likely the amp block has failed
and it will need to be replaced/serviced.
with my issue the release corrected the issue and amp started up fine.
again, one's own mileage may vary and may damage the components
further. It is a protection circuit after all.
there's also a way to see how many protection events have happened for
the various components in the service menu so its possible to see
where the larger issue may be. havent had a chance to dig into yet.
but there are counts for DC, temp and power supply events to aid
in diagnosing problems by a trained professional...
Procedure for resetting is linked here
- thanks dm233!dm233
also posted this here
where he indicates it fixed his problem.
Thanks for sharing dm233MrMcGoo
used this procedure and it worked for him see here
It worked for bdbaba Problem outcome
Worked for Timbak2
(Cautionary Warning still applies)
Again, if I left anybody out, please let me know.
If you use this, please let us know the results to help others.Back to Top
original link here
Back to Top
k.. heres the breakdown on service mode. usual caveats about screwing
with service settings and messing around with bits and pieces not
understood can lead to damaging components, voiding warranties and
bricking a great piece of gear... that being said, i'm not a trained/qualified
service tech but information is meant to be free... and in this case rather
first theres not a lot of info in the service mode. if you think your gonna be
able to tweak a bunch of settings to drive up the receiver performance you'll
be disappointed (unless you can reverse engineer DSP firmware across
to get into service mode (tested and verified on sc-07 not sure bout sc-05
but should be bout the same architecture and platform)
turn off any multizone and lower the master volume all the way down (---db)
then power off.
from here on all actions should be done from the front panel
when in standby, press and hold the "enter" key and "multizone on\\off" for
about 5 sec or so. the receiver will power up and the lcd display will be
blank. release the keys and the display should be in the first section in
general service mode notes
exit service mode - press power button or the return key
the ere are no pretty menus or headings, it's all pretty basic
if there are no key press within 10s then receiver will return to normal mode.
service mode sections - there are 3
1- version (various reports on software/hardware and firmware versions)
2- protect (various reports of DC events)
3- download (upgrade firmware and software components)
navigating through the menus (using the direction pad on the front)
moving from one section to a next is done by hitting either the left or right
arrow. the top item in a section will be displayed.
move through a section with either the up or down arrow (the sections are
linked and can use the up and down arrows to go through every item)
Version section - item | on front disp (results may vary) | explanation
1/4 MAIN/EVENT microcomputer | M1.000 E1.000 | M#.### = MAIN E#.### = EVENT
(will also be the first item seen on the front display when entering service
2/4 DISPLAY (EMMA) microcomputer | DISP 1.000 | DISP#.### = DISPLAY microcomputer
3/4 DSP/HDMI microcomputer | D1.000 H1.000 | D#.### = DSP H#.### = HDMI
4/4 1ST DSP/2ND DSP FIRMWARE | f1.000 s1.000 | f#.### = 1ST DSP s#.### = 2ND DSP
protect section - item | on front disp (varies)
1/11 # of times DC is detected | DC : 000
2/11 # of times OVERLOAD is detected | OVER: 000
3/11 # of times COMBINATION is detected (simultaneous detection of both
DC and OVERLOAD) | CON : 000
4/11 # of times FAN error detected | FAN : 000
5/11 # of times OVERHEAT is detected | TEMP1 : 000
6/11 # of times abnormal temp is detected | TEMP2 : 000
7/11 # of times abnormal temp at PowerAmp supply detected | BTMP : 000
8/11 # of times defect at PowerAmp supply detected | BERR : 001
9/11 RESET error counters | RESET | RESETS all the error counters
use left and right arrows to change option - = no changes -
= resets counters | "enter" to select front disp will read RESET
[RESET] when completed and will exit to normal operating mode
10/11 show accumulated time and RESET | 12345h30m
use left and right arrows to change option - = no changes - =
resets time count | "enter" to select front disp will read 0h om SSP<600ms> | has to do with the error control on HDMI (??) timing
can be changed. (need an HDMI spec expert to weigh in)
basically all the microprocessors can be updated from this page.
Process uses a crossover cable to the rs-232c port. need a few
versions of UFU (unified firmware updater) for the various chips.
not much here unless someone reverse engineers the pioneer parts ala
CHDK... so unless some gets their hands on official firmware it pretty
much SOL... the freescale procs maybe a different story, though
some challenges there are made for a different forum...
item | part | manufacturer (not verified)
1/7 MAIN | PEG489B8 | pioneer
2/7 EVENT | PDC179A8 | pioneer
3/7 DISP | UPD61111GM-100UEVA | pioneer
4/7 DSP | PEG396A | pioneer
5/7 HDMI | PEG118A | pioneer
6/7 1st DSP | DSPA56720AG | freescale
7/7 2nd DSP | DSPC56371AF180 | freescale
firmware extensions - *.mot and *.sz0 (the *.bcd extension in the HMG
update is a bit different. would need some more info to understand its
relationship to the rest of the components but it looks like only *.bcd files
can only update network related components, hence the HMG update.) on
the surface the other firmware needs to be updated through the serial port
on the back. would need to dig a bit to get a clearer picture, but on face
value its not a good use of time. sometimes its best to turn off the hacking
thoughts and enjoy the shiny toys and use them for what they were built
not much to see here, a fairly standard and uneventful service menu, like
most modern pioneer gear is mostly software based and
designed\\manufactured in house. though it may be possible to cross purpose
firmware from other models its not recommended since everything else in
the processor chain would probably need to be aligned or there would be
some stability issues. then there's a lack of average consumer access to any
code as well as any sort of TEST/QA environment. way too much effort for
not a lot of gain and a sure way to void any warranty. pioneer has a whole
army dedicated to write,test and validate new code, but what a nice shinny
new brick you got there!!
remember that even though this information is out doesnt mean that one
should use it if one doesnt know what they're doing. also i'll bet dollar$ to
donuts that if one calls pioneer service and after a blank conversation with
fairly unqualified 1st tier support, they will probably not give you any
firmware to upgrade your receiver and tell you to take it to a service center
if its that important to ya and you value warranty coverage otherwise most
warranties would be void if you do any firmware upgrades yourself. best to
leave the real service work to the pros who are trained and qualified if you
can about your warranty and gear. AGAIN, THIS IS FOR INFORMATIONAL
PURPOSES... USE AT YOUR OWN RISK!!!