TZ clock not going fwd

[Vimtoman]

TZ's clock is not going FWD.
Works OK in Reverse.
Taken the motor driver out and it works OK on the bench with a motor.

Clock sensors.
The 45min sensor does not bleep but does showup on the display indicator when it gets triggered.
It actually also triggers the 0 hour on display but not beep.
Could the LM339 be buggered.

I've taken out the clock circuit and it checks OK on the bench.

Wires pinout OK.

Stumped. Anyone have any ideas as to what may be wrong with either

 

[Durzel]

Does it go forward when you power on the machine.

 

[Vimtoman]

Goes in reverse

 

[Durzel]

Sorry double post.

 

[Happypin]

I live in london se23 your welcome to test any parts in mine if that helps
Alan

 

[Vimtoman]

Thanks , I'm going to try and plod through . Be nice to work it out.

Have fould a few other issues which may be related.

Right cabinet flipper switch not working as well as the flipper
Left works Ok.

Flipper coils switches OK.

Found a 3A fuse blown on the power board.

 

[Happypin]

These pins do test us,
I had to buy the small 12v & 5v board that mypinball sell so I can remove the colour DMD 12v supply plus my topper which also needed to be piggy back off the same socket, strange things was happening before I did this I’m now up running with no issues until the next challenge.

Good luck keep us posted

 

[Happypin]

Thanks , I'm going to try and plod through . Be nice to work it out.

Have fould a few other issues which may be related.

Right cabinet flipper switch not working as well as the flipper
Left works Ok.

Flipper coils switches OK.

Found a 3A fuse blown on the power board.

Just to add mine also had a blown fuse, all flippers was weak

 

[pinballmania]

Forward enable and reverse enable come from separate connectors in the aux driver board. Check those connections and reseat the ribbon cable connected to it at both ends.

 

[Vimtoman]

Thanks . I've checked the connections for the motor and they seem? fine.
The motor board does work correctly but when first powered does just runs in reverse for a period of time .
Eventually stops and responds to control inputs.
I've ordered an Ingo board to put in just for reliability on the clock side.
Plus going to order ribbon cable connectors and make new ones.

 

[Durzel]

When you power on the game the clock should run forwards for a bit and then (in most cases) backwards until it lands on 12.

If it goes past 6 when going forwards at the start it will carry on going forwards until it hits 12, not going backwards at all.

Just to be clear - does it ever go forwards?

 

[Vimtoman]

Only Rev.
When using the test it does not go fwd fast or slow.

I will swap the ribbon cable and the 8way driver pcb.

I know its not the motor drive.

The clock 0 and 45 is also not working as well as the left flipper .
So the main CPU board may also have a problem.

 

[Vimtoman]

OK
Found that when doing a solenoid check the clock does go fwd and rev in this test but not in the clock test?

I have also found that the row 2 & 3 are joined so switches of each row trigger their neighboring switch.

e.g switch 1 on row 2 triggers switch 1 on row 3.
Cant find a shorted diode or switch to gnd.

The Clock 0 and 45 switches are both on row 2 & 3.

Looking on a scope I see two triggers on the switch contacts ?

Right flipper also not working which is also in this area but Looks like its on the fliptronics section.

 

[Vimtoman]

Well got it all going now. :
Reworked CPU board
Cleaned and replaced Opto's in clock
cleaned and replaced Opto's in Right flipper circuit.
Changed bulbs in clock to led's

 

[Durzel]

Great job

 

[Vimtoman]

Spoke too soon.
Still have an intermittent clock going fwd.

When booting from cold it sometimes does not go fwd.
Checking with the clock test Fwd sometimes does not work?
It does work everytime when using the solenoid test. That has a clock fwd/rev test.
And when using the solenoid test all works fine. Even on the clock test?

I'm thinking its either the ribbon cable or the 8 way board.
The motor board is fine.

 

[chris b]

Buy a new clock board and have done with it

 

[Happypin]

Buy a new clock board and have done with it

That’s what I did trouble free ever since...

 

[Vimtoman]

The clock circuit is fine. Sorted the opto's out and placed led's in.

It's the motor control side thats dicky.
Have replaced the ribbon cable to the 8 way driver board and all seems OK.

 

[chris b]

Ok you know best

 

[Vimtoman]

Ok you know best

If all the opto's are working in the clock why would this make the motor intermittent in direction?

Is that a known issue?

 

[Vimtoman]

@chris b OK I'm going order the Ingo version.

It seems to fail at startup from cold and when going in and out of menu works OK? really odd.

 

[Vimtoman]

Right have definitely found the problem.

It's not the clock.

I'ts a weak connection on the GND connector J103 of the power driver pcb.

Changed that and works 100%

 

[Happypin]

Right have definitely found the problem.

It's not the clock.

I'ts a weak connection on the GND connector J103 of the power driver pcb.

Changed that and works 100%

Made a note of that fault, well done

 

[Vimtoman]

I also noticed that the GND fault also effected the Flipper test, testing hold mode was weak and flippers did not shift too well.

 

[Happypin]

I also noticed that the GND fault also effected the Flipper test, testing hold mode was weak and flippers did not shift too well.

Over the last couple of years I’ve had to change quite a few connectors causing all sorts of faults, so nice when they are running well, just played the TZ

 

[Vimtoman]

Just finished a session myself, testing it out.
All looks good now.