sonic frontier sfd-2 mark ii DAC, smoke...

Dear Sir/ Madame, My DAC , sonic frontier sfd-2 mark ii, has been used last 20 years and worked fine, turn it on yesterday, smokes came out. Opened cover found some resistor burn as R21, R22, LR21, LR22 on Analogue board, ( left and right) Try to locate service manual on internet but no luck, Any ideas. Thnx for any inputs.
I though Parts Connexion in Canada can service those things. 

The designer of Sonic Frontiers now runs Parts Connexion.  If anyone can help you, he can.

Thnx guys , contacted them, got big help fron nice Canadian guys.