DG7-32 R99 & R4 - 330K, R6 & R8 - 220K pin board 1 f 2 G 3 K 4 F 5 nc 6 Y2 7 Y1 8 A 9 X2 10 X1 11 nc 12 f pin 1 & 12 - filament voltage across these should be 4-6VAC Read all other pins referenced to ground (0VDC): PIN VOLTAGE 2 ~ -300VDC 3 ~ -295VDC 4 ~-150VDC 6,7,8,9,10 ~150-250VDC