Re: Weak TZ Flippers.

Ouch!
Sorry you had a bad experience. Did you happen to measure the input
voltages to your audio board before and after?
I have the following pins all set for low line with no issues to
date:
DM, STNG, TZ, T2, JD, TOTAN, LOTR, HSII, RS,ToM, SDW, JM, and RFM. My
TZ and T2 both use the exact same transformer setup as your pin.
I feel your result should not be considered a sign that adjusting for
low line is bad, the machines had this adjustment available because
the designers felt it was needed for proper opertion at low line
input.
My AC line swings daily from 109Vac to 118Vac, sometimes higher. I
used a latching RMS digital voltmeter to capture max/min line voltage
reading every day for almost a year. Tonight I saw 121.2 for a while.
I had machines on for almopst 4 hours.
I will keep them pinned this way unless I see some issues arise that
suggest a trend toward power issues, or if I sell to someone with
normal line voltage, or God forbid, my power company gets their act
together ; )
As far as the caps your looking for, Mouser has just about anything
you could possibly want, and no minimum purchase, check them out.

Here is a list of machines that use the same Transformer as TZ
(Apologies, this was given to me in a larger document by another RGP'r
some time ago, I regret I do not know the author)

5610-12835-00 xfmr-wpc 3 115/230v (18VAC sound)
BR, BSD, BoP, CftBL, DW, FH, FT, GI, HD, HS2, Hot_Shots_Basketball,
Hurricane, PZ, Slugfest_92, T2, TAFG, TZ, WH2O.

This same document show that actual measured no load output of the
50Vac windings on all 3 types of WPC transformers (WPC, WPC-S. and
WPC95, were 55.7Vac plus or minus 0.5VAC, with a line input of 121Vac.

Please do advise if you ever come to a resolution of your weak flipper
issue.

Best Regards,
Scott

On Oct 17, 7:33 pm, necro_nemesis <necro_neme...@xxxxxxxxxxx> wrote:
On Oct 8, 9:56 am, necro_nemesis <necro_neme...@xxxxxxxxxxx> wrote:

I am stumped as to why my TZ flips are still weak. I have rebuilt them
twice! with new coils (the correct value onces) plungers, stops, EOS,
proper calibration etc. I have swapped out the fliptronics board from
a game that I have that has no flipper issues and didn't see much in
the way of change. I also just for shits and giggles swapped the two
LM339's on the original fliptronics board and that may have had only
minor effect.

I am starting to suspect the transformer but before trying to hunt one
down I am hoping someone can give me an idea of what else to try? It
just seems like they aren't getting enough power to them.

Well I moved the pins over and that resulted in some issues. The
additional voltage must of overstressed some weaker components in my
audio board and poof she blew immediately. I changed it back to the
original power configuration and ran it without the board to see if
anything else occurred. Thankfully it didn't, but I have spent the
last two evenings repairing my board. I had the initial symptoms of
the 4700mf 35Vcap failure. Loud hum with no control over the volume of
it. I am convinced the problem exists in the amplification section
alone. Changing the caps did not reduce the hum, I jumpered those
large caps to make sure continuity was good. No change then removed
the jumpers for originality. Then I went on replaced the LM1875T
amplifier and C22 22mf cap. This gave me sound back but I have a low
volume background hiss. I went on to replace the TL084CN op amps. No
change, hiss is still there. I tending toward the problem being now in
the smaller tant caps but they aren't readily available where I am.
Still hunting for these caps unless someone can suggest another route
to go. I have run the board in both TZ and Getaway with the same
results. I have also removed the EPROM and data cable to isolate the
amplification section and the hum remains.

The upshot is, I won't be playing with low voltage compensation
anymore.


.

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