Gday Pinside
My TFTC has an issue with pop bumpers and slingshots
They all work and score but have only about 20% power
I have installed 3 different power supply boards 2 playfield power supply boards and it turns out its on the MPU board
All pop bumpers and slins 100% on a Rottendog board I've got as a tester
I'm wondering if someone can tell me what transistors and resistors are related to pop bumpers and slingshots
I'm bad at reading schematics but I can replace components on boards well Want to put the original MPU back in the machine
Thanking anyone who helps in advance
David

Gday YeOldPinPlayer
Thanks for the link So the pops and slings are Q8-Q12 I've checked the transistors the resisters and capacitors with a multimeter all around there Followed lines on board checked other TIP 122 tranies All ok
The only problem I found was C46 and C47 Two capacitors that look like resistors (to me because I know fuck all) There were another couple of these and they all had a value C46 and C47 were testing 1 or nothing
Also found a pinside post that listed all components on DE MPU boards They are 1U ceramic axial capacitors But it didn't say any voltage
So do you have any idea what it would be?
I'll try and put a pic of them up
Just hoping that might be the problem
Thanks mate
David

20230429_151942 (resized).jpg

Gday YeOldPinPlayer
Thank you That's a different post from the one I saw It only said 1U no voltage Will pick them up when I go into town on Thursday
In your previous post you mentioned a power issue What did you mean by that?
Thanks again mate
David

Gday Frunch
The MPU is all good No acid damage
Still has the three AA batteries which are regularly changed Did put a Ramtron NVRAM in but kept resetting Obviously a bad ram but haven't bothered to get a new one Batteries work fine
Board looks great Everything works fine except pops and slings
Thanks for looking and answering
David

Gday Frunch
Unsoldered 1 pin on c46 and c47 and they have no value on multimeter So they're ok
I'm going to resolver everything connected with CN13
It has to be something there because I play TFTC every night with the Rottendog MPU and everything works fine
Thank for the help Let you know after I resolver
David

Gday YeOldPinPlayer
With the Rottendog MPU the pops and slings work fine I play it every night Don't watch TV I've got 6 machines But am playing TFTC a lot
So ground issues wouldn't be a problem I'm guessing Correct me if I'm wrong
Going to resolver everything around CN13 The transistors etc for the pops and slings are right there I'll let you know when I get it done
Thanks mate
David

Gday guys
Reflowed solder over that part of the board on the back Did all of front side except transistors No change Going to have to test the relay that's there also
Might have to give up and send it to Ken Shipley He's got all the test equipment for DE Williams Bally Gottlieb etc
Will try a few things first though
David