urquattro Dashboard Repair

sroberto74 · 02-10-16, 07:17 AM

Hi, i try to repair my dashboard (green) , I have a problem with power unit .

The big problem is the IC in the middle of the photo , becouse i can not read wich type is.

Is totally unreadable.

someone know wich is?
thanks

sroberto74 · 01-11-16, 08:38 AM

Updeta status:
i can not discover what is this IC , when i try to power the unit it seems to absorbe much power , so i decide to remove (new) final stage ... some time try to oscillate some time no . i think to try to replace all capacitor . All active components (tr and diode are good)

Steev · 01-11-16, 10:33 PM

30 year electronics, not sure anyone can guide you on this. What do you mean when u say IC?
rgds
Steve

quattromnc · 01-11-16, 11:33 PM

Quote:

Originally Posted by Steev

30 year electronics, not sure anyone can guide you on this. What do you mean when u say IC?
rgds
Steve

IC's are integrated circuits, basically chips, three of them in the pic, the black multi-pinned untis.

If someone had a circuit diagram of this, it would likely show up on that what it is, the fact its 30 yrs old may just help here!

sroberto74 · 02-11-16, 08:04 AM

Thanks to all,
http://audifans.com/mirror/www.isham..._digidash.html
at the moment is the best indication that i discover , the output voltage to test, so if is not possible repair the unit a possible solution is rebuild new one .

The IC (integrated circuit ) that not have signature may be a microprocessor (a pic for example) or another logical port.

if someone have a circuit diagram is great!

(sorry for my English)

sroberto74 · 07-01-17, 08:00 AM

Happy New Year everyone!
One little step to resolve... Becouse i don't know what is the IC.. i hope the clock was generated in analogic mode so i change all capacitor and the oscillator start up !!

I have now right voltage but the display dont turn on...

01-11-16, 10:33 PM	#3
Steev Grown up member Classic Audi Club Member Join Date: Aug 2009 Location: Cheshire Posts: 872	30 year electronics, not sure anyone can guide you on this. What do you mean when u say IC? rgds Steve __________________ Lots of Audi 100 C1 saloons (1973-77) Audi Coupe S (1972) Audi WR Turbo (1987) NSU RO 80 1975 (look it up!) Vauxhall Cavalier Mk1 2000 GL 1979 Vauxhall Cavalier Mk1 1900 GL Coupe 1978 Vauxhall Viva HB 1967 (45HP beast!)

01-11-16, 08:38 AM	#2
sroberto74 Newbie! Join Date: Sep 2016 Location: Italy Posts: 8	Updeta status: i can not discover what is this IC , when i try to power the unit it seems to absorbe much power , so i decide to remove (new) final stage ... some time try to oscillate some time no . i think to try to replace all capacitor . All active components (tr and diode are good)

02-11-16, 08:04 AM	#5
sroberto74 Newbie! Join Date: Sep 2016 Location: Italy Posts: 8	Thanks to all, http://audifans.com/mirror/www.isham..._digidash.html at the moment is the best indication that i discover , the output voltage to test, so if is not possible repair the unit a possible solution is rebuild new one . The IC (integrated circuit ) that not have signature may be a microprocessor (a pic for example) or another logical port. if someone have a circuit diagram is great! (sorry for my English)

07-01-17, 08:00 AM	#6
sroberto74 Newbie! Join Date: Sep 2016 Location: Italy Posts: 8	Happy New Year everyone! One little step to resolve... Becouse i don't know what is the IC.. i hope the clock was generated in analogic mode so i change all capacitor and the oscillator start up !! I have now right voltage but the display dont turn on...