Symphony grundig cassette, SKZ2Z, 1U0 - diagram needed

Hi,

I'm looking for a service diagram (schematic)

While I was doing sth not related with Symphony I dripped a solder into lying sideways Symphony's opened casing. It was so unfortunate that the solder dropped on its motherboard. And trying to remove the drop I desoldered some tiny smd element, which I can not identify at the moment 
It effected the keys started to work "strangely" / unpropper. For example: while entering the radio unlocking code the digits jump irregularly... :(

As far as I remember, this element was black or dark green. Perhaps it was a resistor (?)

If someone have the diagram I'll be grateful. Same if perhaps someone, in the near future, would have the radio taken out and then could take a close up or hi-res picture of the motherboard between the mechanism of the cassette and the back panel.

Best regards. / Pozdrawiam.

Edited 8 March, 20188 yr by Gawronik