Linn Preamp Model "Kolektor" - Display shows "Err4" after Switch-ON: What means this?

Linn Preamp Model "Kolektor" - Display shows "Err4" after Switch-ON: What means this?

On the web there are not many information concerning this preamp.
Even in the attached PDF files there are no advices.
A reset according the instructions provides not the wanted results.
Who can post advices ? - thank you.
 

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Hi
I found this:
The KOLEKTOR Preamplifier provides a Reset to Factory Defaults option which allows you to reset the unit back to its factory settings. This restores the user options to their initial values, and resets the inputs to their initial source names.

To reset the KOLEKTOR
Switch off the KOLEKTOR, using the power switch on the front panel.
Press and hold down VOL+ (front panel) and switch on the power again.
Keep VOL+ held down until the display shows init.
The KOLEKTOR Preamplifier will then return to normal operation with the default settings.

Take care and keep the volume low initially just in case there is some software/hardware glitch.
Good luck.
 
yes, this is mentioned on page 26 at the above PDF in German language.
Unfortunately "iNit" don't appears, instead this appears the same message "Err4", just like after normal switch on.
I have my own schematic diagram created several years ago, but unfortunately only for the signal gainstages and the interface and not for the MCU area.
Maybe a software refresh or software update must be perform.
 
Schematic for Linn Preamp Model "Kolektor" (except MCU-PCB)

Here we go:
 

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Schematic for Linn Preamp Model "Kolektor" - II (except MCU-PCB)

additional schematics
 

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any pictures:
 

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  • Linn Kolektor Front.jpg
    Linn Kolektor Front.jpg
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  • Linn Kolektor bottom view+RC.jpg
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  • Linn Kolektor rear-view.jpg
    Linn Kolektor rear-view.jpg
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  • Linn Kolektor Main-PCB-II.jpg
    Linn Kolektor Main-PCB-II.jpg
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  • Linn Kolektor Main-PCB-I.jpg
    Linn Kolektor Main-PCB-I.jpg
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more pictures.
The burned R70 must actually be the main reason for the displayed message "Err4"
What is R70's job?
Maybe the "18CV8" (CMOS Programmable Electrically Erasable Logic Device) is damaged.

The DVD-player service manual under
http://fixmag.ru/download/1256236432_dv718si-service-manual.pdf
(page 34 to 38) provides useful troubleshooting advices in general for faultfinding in MCU control boards of any device.
 

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  • Linn Kolektor Burned Resistor R70.jpg
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  • Linn Kolektor Main-PCB-18CV8J.jpg
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  • Linn Kolektor MCU-PCB-III.jpg
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I solder a new L4971D: i now have a correct 5v in the H8/3337. But Error 3/4 is still here.

After some investigation, I see I have 9v on both SDA/SCL: it's coming from the TDA7439.
After desoldering of the TDA7439, I have 0v on SDA/SCL and the Kolektor boots without error and then 5 sec after, Error 7.

The TDA7439 is dead...
 
When the parts are already obsolete for years and the design is so so maybe spending time on it is futile.

Had a Kolektor on temporary loan long ago and heard clicks while changing volume. Did not sound that good either but it proudly said "Linn" on the front cover. There was a FM tuner delivered as well with it that was equally unimpressive. For some reason stuff with a name on it and that even dies more often than what is average has attraction. IC input switching, electronic tone control & volume control, SMPS...would you have bought it if you would have known its innards?
 
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