I just got 2 very used Metz 45. One is the 45-CT4 and the other is the 45-CL4. The 45-CT4 is fine. Full power manual as I measured is GN125 in feet (short of the 145 specs but that is to be expected). But the 45-CL4 is only about GN 57 or so. Auto exposure is correct and if the distance or f/stop chosen is small it would not light the confirm light. So the autoexposure part is OK but the flash just can't have the power it's supposed to have. I check and compare the current draw on the 2 units. Initial draw about 7A on both unit but when the unit charged up the good CT4 still draw 0.5A while the CL4 only draws 0.25A. The ready light on the CL4 comes on very fast but leaving it on for a few minutes before firing does not result in more power (OK about 1/10 of a stop). I wonder what is the problem. I removed the cover, disconnect the capacitor and made capacitance measurement on both units with a DMM and they both show about 1500 microfarads.
I wonder anyone has any idea?