I just bought a CFTBL and flippers were weak and needed some new parts, so I did a repair and replaced all worn out parts.

After the repair the flippers work flawless, but it's like they became too powerful. If you shoot the KISS left loop the ball just bounces back out of the loop most of the time and shooting the left ramp u get an airball jumping out of the ramp 1/3 of the time. I have checked that the correct coils are installed. If i measure the voltage on the coils it read 81V which seems a little bit too high? I tried replacing the fliptronics card from my Dr Who but with the same results, 81V. I don't know if 81V is really a problem but it seems a little bit too high, which might cause the increased flipper strength. I noticed that if i disconnect J102 on the power driver board the flipper coils read 70V. But as soon as i connect it they jump back up to 81V. I've thought about replacing BR3 on the driver board and/or BR1 on the fliptronic board, maybe getting new coils since i guess some previous owner might have removed some copper windings from the coils to make them more powerful but i thought i'd check here before I do anything. Any ideas?

Yes they both drop to zero volts, flippercoils voltage then start climbing slowly up to 2-3V

my cftbl fliptronics board has the small capacitor, but the one in my dr who does not. same problem with 81v with the fliptronics board from dr who installed in cftbl though.

no previous repairs at all as far as i could see when i inspected it.

Ah forgot to say that, the first thing i did after googling around was changing the R260 resistor, i took a 47k ohm instead, no difference though, still 81v.
Playfield is at about 6.5-7 degress, more than enough i'd say.

I'll take a look at the transformer

hm found something strange.. white cable from fuse box/power on switch goes to white/brown cable to transformer instead of to the white/orange cable where is should go.. it has been modified for some reason, you can see that the cable has been connected to white/orange before but that cable is cut off and then inserted to connect to the white/brown cable instead. not exactly sure by looking at the schematic what this would cause.. or why it has been modified this way.

Yep i've done that now and voltage is steady at 74V! Flippers seem to be a little lest powerful now which is great, however, i seem to be missing 20V now, none of the flashers are working. Reading 0v at the TP for 20v on the driver board..

Ah nevermind my previous post, just a blown fuse. Changed it and now 20v and flashers are back again. A bit strange though cause the flashers were working fine up until i redid the transformer connection!

Yup thats what i did, but F111 not F112 was blown, it was not blown just before i did the transformer recabling though, flashers were working just fine, strange!

Thanks for your help! Greatly appreciated!