Hi
The schematics I have are:
T82352.71 (PCB JK) Last drawing rev: 6A - 26 FEB 92 Used on SL678
T82353.71 (PCB GH) Last drawing rev: 6A - 10 NOV 92 Used on SL678
T82353.72 (PCB GH) Last drawing rev: 6A - 10 NOV 92 Used on SL678
(These are the same as the scanned pdf manual from this forum)
T82353.71.3 (PCB JK) Last drawing rev: 1A - 31 JULY 97 Used on SL678E3
T82353.72.3 (PCB JK) Last drawing rev: 1A - 31 JULY 97 Used on SL678E3
T82353.71.4 (PCB JK) Last drawing rev: 1A - 31 JULY 97 Used on SL678E4
T82353.72.4 (PCB JK) Last drawing rev: 1A - 31 JULY 97 Used on SL678E4
I don't know any differences on the last two revs E3 and E4.
Let me know which ones you want
Cheers,
Uffe