Marshall VS100 Reverb works but doesn't??

[GasMask52]

VS100 was 100% alive , suddenly the Clean Channel Reverb stopped working (The Overdrive Reverb channel works perfectly though, and the Reverb box is OK), Re-soldered for security the Clean Reverb Pot & the RCA inpus (on Pre-Amp) but nothing changes.

My question is why ONLY the clean channel reverb is dead and the overdrive one is fine? What components are key ones for the clean channel reverb?

 

[South Park]

The reverb is controlled by a ic chip .

 

[GasMask52]

The reverb is controlled by a ic chip .

So the reverb works perfectly, but on the clean channel it dies, there's an Integrated Circuit (IC2) directly connected to the Clean Reverb Pot , is that the one? Or is it the IC near the RCA inputs in the Pre-Amp?

 

[South Park]

You would have to look at the schematic to know for sure . Look for a loose connection to the ether Chanel . Wish I could help more