(Topic ID: 203202)

Elvira Help


By robertg130

1 year ago



Topic Stats

  • 86 posts
  • 6 Pinsiders participating
  • Latest reply 1 year ago by GRUMPY
  • Topic is favorited by 2 Pinsiders

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There are 86 posts in this topic. You are on page 1 of 2.
#1 1 year ago

Hi,this is my first system 11b machine,left sling kicker solenoid turns very hot,need to turn off machine to prevent damage.
Someone can help me track this problem
Thanks

#2 1 year ago

Looks like Q71 is the driver for that coil. Maybe a shorted out Q71?

#3 1 year ago

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#4 1 year ago

Thanks for the reply,I checked transistor and pre and looks fine both

#5 1 year ago
Quoted from robertg130:

I checked transistor and pre and looks fine

Did you measure them with a DMM as Looks can be deceiving!

http://www.pinrepair.com/begin/index.htm

Once there scroll down to "Transistors and Chips."For each of these have one lead of the DMM on the metal case (tab) of the transistor (which is usually the center leg of the transistor). Then the other lead of the DMM will test the outside two legs individually. A value of .4 to .6, or 1.0 to 1.2 should be seen, depending on the exact transistor, and which lead (red of black) is on the metal tab. The biggest indicator of a bad transistor would be a value less than .2 (probably a short)."

and

http://www.pinwiki.com/wiki/index.php?title=General#Testing_a_Transistor.2C_Silicon_Controlled_Rectifier_.28SCR.29_or_Field_Effect_Transistor_.28FET.29

#6 1 year ago

Yes,checked with dmm,black led to the center and check the corned with red led,mesure between.7 both.Maybe some of the Zener diodes?how to check ?

#7 1 year ago

If the zener diode is turning on the coil it will be shorted. Easy to check ohms across the zener, a low reading is bad.

#8 1 year ago

Tested zeners z3-z9 like regular diodes and looks ok

#9 1 year ago

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#10 1 year ago

This was a machine that was in a garage a couple of years and I bought it and made a new cabinet,and I’m trying to put it to work

#11 1 year ago

Do you have a logic probe?

#12 1 year ago

Thank you grumpy,yes I have a Logic Probe
Today rechecked transistor and pre also Zener diodes again,looks like good everything.
Problems(someones)
Left slingshot selenoid lock when turning on machine
Right popbumper also locks on the same
When I push left sling switch,the right sling fires (matrix problems?)
Also whenever I push the left bumper the coffin targets resets
The 3 test buttons just work the left one
Think this is all
Please I’m good repairing wpc system,but this system is my first one.
Maybe we start for the ic’s7402,7407
Thanks a lot
Robert

#13 1 year ago
Quoted from robertg130:

Please I’m good repairing wpc system,but this system is my first one.

Then this should be easy for you.

Quoted from robertg130:

Left slingshot selenoid lock when turning on machine
Right popbumper also locks on the same

Disconnect 5J11 and 5J12 on the aux power supply. This will cut the power to all flashers and solenoids. Now you can turn on the power to test with no worries of melting coils. Then you can hook up your logic probe to the CPU test points and start testing.

#14 1 year ago

Also please check for old battery corrosion.

#15 1 year ago
Quoted from Taxman:

Also please check for old battery corrosion.

^^^^ Not a bad idea to take a pic of the CPU board.

#16 1 year ago

Machine have battery holder,to my view there is no sigoof corrosion,exactly what you want I measure with the Logic Probe?
Thanks

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#17 1 year ago

What next
Replace 7402,7407?
Thanks

#18 1 year ago

Lets start with the left kicker(SS#2). Page 3-7 in the manual shows Pins 5 and 6 of U-45 are inputs and pin 4 is the output. With the power on and in attract mode both pins 5 and 6 should be high and pin 4 should be low. If good the check the base of Q-70, this should be a low also. If good then test the base of Q-71, this should be a low also. Let me know what you find.

#19 1 year ago

Thanks.Everything reads like you said
What next

#20 1 year ago

Use a ohm meter and check Q71 metal tab to ground. Should be .600 meg or higher.

#21 1 year ago

Yes .6

#22 1 year ago

Sounds like the cpu is fine. Certain coils are high voltage coils and they a higher power tip to control them. They are on the aux power supply. Q6 controls this coil. Test it for a short.

#23 1 year ago

Bingo!! Q6 is shorted!

#24 1 year ago

Changed Q6,and both selenoids left sling and right pop bumper stopped from locking up at turning on the machine,both locks again when pressed start button(starting a game)☹️.
What next

#25 1 year ago

You weren't ready to connect power at 5J11and 5J12 yet. Now that attract mode is good it's time to start a game and retest U-45 and U-50 inputs. The inputs from the switches should still be all highs and the other enable inputs should have gone to lows. Check these and let me know what you find.

#26 1 year ago

Happy Thanksgiving grumpy,u-45 pin5=h,pin6=l,pin 4=l
U-50
Pin5=h,pin6=l,pin4 =l
Thanks for your help

#27 1 year ago

Looks like both 7204 chips are bad.Some said this is happens a lot

#28 1 year ago
Quoted from robertg130:

Looks like both 7204 chips are bad.Some said this is happens a lot

When a pin is not maintained for a long time, the power supply starts putting more AC voltage on the DC and this stresses the logic parts.

#29 1 year ago

So what’s next?change those 7204?

#30 1 year ago

Inspect 7407?6821? Or changing the 7402 fixed the problem?

#31 1 year ago

Your testing shows that U-45 and U-50 needs to be replaced. Then more testing will need to be done to correct any other problems.

#32 1 year ago
Quoted from GRUMPY:

Your testing shows that U-45 and U-50 does not need to be replaced yet. Then more testing will need to be done to correct any other problems.

Edit for bad talk and text.

#33 1 year ago

Any time you change a TIP you need to change the corresponding diode. So you need to change D-22

Quoted from robertg130:

u-45 pin5=h,pin6=l,pin 4=l

What does the base of the predriver and driver show. If both show low then check resistance of metal tab to ground. Sometimes the TIP test good but are bad when powered up.

#34 1 year ago
Quoted from robertg130:

U-50
Pin5=h,pin6=l,pin4 =l

This for the flip up reset, and looks fine.
You need to check U-45 pins 2 and 3 inputs and pin 1 output for the right pop bumper problem.

#35 1 year ago

t does the base of the predriver and driver show. If both show low then check resistance of metal tab to ground. Sometimes the TIP test good but are bad when powered up.

Don’t get it well,you said for Q71?
Also I changed both 7402 with the same results
Diode 22 test good
I’m stuck

#36 1 year ago

In game u45 pin 2=h,3=l,5=h,4=l
In atrack pin 2=h,3=h,5=h,4=l

#37 1 year ago

Inspecting diodes in the auxiliary power driver
D 40 read like bad

#38 1 year ago

Lets try testing U-45 again, in attract mode pins 2,3,5,6,8,9,11 and 12 are high. Pins 1,4,10 and 13 are low.
In game mode,pins 2,5,9 and 12 are high and pins 1,3,4,6,8,10,11 and 13 are low. Then place your probe on pin 1 (its low) then push the skirt of the right pop and the probe should read high. Then do this for pin 4, push the left sling rubber and pin 4 should go high. Next would be pin 10, push the right sling and pin 10 should go high. Last check pin 13, and push the left pop skirt and pin 13 should go high.

#39 1 year ago

Hi mr Grumpy,everything reads like you said,everything is correct
What next?
Thanks a lot

#40 1 year ago

With a game started measure resistance from the collector pin 2 to ground on all 22 TIPs on the Cpu.

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#41 1 year ago

On you mean dmm in diode test?
Black to center leg(or tap)and red to ground?
There is 38 tip 122 on cpu board

#42 1 year ago
Quoted from robertg130:

On you mean dmm in diode test?

DMM in resistance test.

Quoted from robertg130:

Black to center leg(or tap)and red to ground?

Black ground. Red center lead.

Quoted from robertg130:

There is 38 tip 122 on cpu board

There is only 22 TIP 122 that control solenoids, there are 8 TIP 42 and 8 TIP 122 in the lamp matrix section.

#43 1 year ago

Hello,have a nice day!
Q
14,15,16,17=1(infinite)
30,31,32,33=1
22,23,24,25=1
6,8,9=1,7=250
69=9.5
71=246
73=1
75=16.3
77,79=1
Taken in ohms in the center leg(or tap),to ground

#44 1 year ago

Q-7=250. Q-69=9.5 Q-71=246 Q-75=16.5 these needs to be replaced with TIP102. Then retest again and all should be infinite.

#45 1 year ago

Ok,you’re right

#46 1 year ago
Quoted from robertg130:

Ok,you’re right

Don't be to sure on that, just ask my wife.

#47 1 year ago

Hi,just q7=1,the others 3 not
Q69=9.5
71=460
75=17.5

#48 1 year ago

Changed transistors,but used t122,Q6 to hot and damage again

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#49 1 year ago

Ok fixed,maybe bad q6
Now bumper and sling not locking in start or atrack mode
Q69=55 ohms
Q75=63 ohms
Q71=activate right sling

Things don’t work
Left slingshot
But when activate left slingshot switch right sling activate
Touching righ sling do nothing
Pop bumpers won’t work any
Or the buggy man
That’s for now
Jajajajaja
Thanks

#50 1 year ago
Quoted from robertg130:

Changed transistors,but used t122,Q6 to hot and damage again

You must leave 5J11 and 5J12 off until all troubleshooting is done. Other wise you will keep damaging stuff.

Quoted from GRUMPY:Then retest again and all should be infinite.

Retest with DMM not by hooking up coil power.

Quoted from robertg130:

Q75=63 ohms
Q71=activate right sling

Replace the predriver for these and retest.

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