I was given this and am doing something silly and attempting to repair it. I've got the manual, though the schematic is a challenge as it doesn't tell you what position the switches are in.
It works on all the mA DC ranges. But the 200K, 2000K and 20M ranges don't work, nor do the 20, 200, and 1200 VDC and VAC ranges. Shooting up the switches with tuner cleaner helped, but did not solve everything. I then reworked the range switch solder joints, but still no change.
You an get as good a DMM from Harbor Freight for free, so this is more just a grudge match than anything else.
Is anyone familiar enough with these to offer any hints or insights?
Edit: R1, the 2 W 9.9 M resistor in the input divider is failed open. Checks of Newark, Digikey and Mouser did not turn up a replacement. You're actually supposed to replace R1-R3 as a matched set. So it's just parts.