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Pinbot does not want to boot

Balazs

Balazs

Site Supporter
Joined
Oct 19, 2019
Messages
380
Location
London
Alias
Baz
Hello
I have a pinbot sys 11 mpu which does not want to boot.
What I checked so far:
5v and 12v on mpu
Reset section all transistor(new transistors installed) , resistors good
I went over the reset section with a jumper nothing.
I changed c30.
I checked all 6821 5v by the ic leg
I checked cpu 5v by the leg
I checked all rom 5v by the leg
I checked all the 6821 with the digital multimeter to the ground legs
I checked clock signal with logic tester.
What Im thinking is a wrong rom, pia or cpu but I dont have spare to try.
On the mpu 5v led is shining and when I switch of the power the 3. Led blink a bit.
If somebody has any idea what to check please let me know.
Thanks
Baz
 
Hello I cant send it because Im 1600km away from england
 
Balazs said:
Hello
I have a pinbot sys 11 mpu which does not want to boot.
What I checked so far:
5v and 12v on mpu
Reset section all transistor(new transistors installed) , resistors good
I went over the reset section with a jumper nothing.
I changed c30.
I checked all 6821 5v by the ic leg
I checked cpu 5v by the leg
I checked all rom 5v by the leg
I checked all the 6821 with the digital multimeter to the ground legs
I checked clock signal with logic tester.
What Im thinking is a wrong rom, pia or cpu but I dont have spare to try.
On the mpu 5v led is shining and when I switch of the power the 3. Led blink a bit.
If somebody has any idea what to check please let me know.
Thanks
Baz
Click to expand...

Did it just go like this or has it never worked since you had it?
 
It says you are from London on your profile.

As you got a barn find it could be anything. There is a reason why it was put in a barn. If it had batteries in it and they have leaked - this will cause serious problems.
 
I ve got like this.
I know the battery leaking can cause problem.
But the board looks not to bad for me.
 
So to be clear, when you switch it on the left LED (+5vdc) is on, but middle (diagnostics) and right (blanking) are both off?
 
Pick Holder said:
It says you are from London on your profile.

As you got a barn find it could be anything. There is a reason why it was put in a barn. If it had batteries in it and they have leaked - this will cause serious problems.
Click to expand...
Yes but because of the covid 19 Im abroad.
 
Turn the machine on and press the bottom CPU diagnostic switch (SW2) on the left side of the board. Count how many times the middle LED (diagnostics) light flashes.
 
Markjduk said:
Turn the machine on and press the bottom CPU diagnostic switch (SW2) on the left side of the board. Count how many times the middle LED (diagnostics) light flashes.
Click to expand...
It does not blink anything I just pressed and released.
 
Markjduk said:
Turn the machine on and press the bottom CPU diagnostic switch (SW2) on the left side of the board. Count how many times the middle LED (diagnostics) light flashes.
Click to expand...
Does the sys 11 need proper 12v to boot?
 
When I testing in the machine on the power driver board tp 12v is 13.6v when I connect the mpu the voltages dropps to 10.6v.
When I put it to the bench supply the voltages does not dropp it is 11.7v.
I put the board to the bench supply and pressed the cpu button but nothing happened.
 
I would disconnect everything from CPU board apart from the power and then test:
  • TP1 = +5 volts on the PSU board.
  • TP2 = GND on the power supply board.
  • TP3 = +12 v on the PSU board.
  • TP4 = -12 v on the PSU board.
Then test for +5 volts at TP2 on the CPU board.
Then test for +5 volts right at the chips themselves.
 
Markjduk said:
I would disconnect everything from CPU board apart from the power and then test:
  • TP1 = +5 volts on the PSU board.
  • TP2 = GND on the power supply board.
  • TP3 = +12 v on the PSU board.
  • TP4 = -12 v on the PSU board.
Then test for +5 volts at TP2 on the CPU board.
Then test for +5 volts right at the chips themselves.
Click to expand...
I did all the test diconnected everything except the power board
 
When I connect the soundboard Ive got this. The volume control potmeter is working as well
 

Attachments

  • VID_20200623_231250.mp4
    30.7 MB
All theese transistors ok no short
 

Attachments

  • 15932046435246895591330819119848.jpg
    15932046435246895591330819119848.jpg
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Use the logic probe to check the reset line on the U15 6808 CPU - PIN 40. When you power the game on, pin 40 should be low for a second, then go high. If the signal goes low then high repeatedly the game is trying to reset itself over and over.
 
Do you know is there any guidance for sys 11 like this?
 

Attachments

  • Screenshot_20200626_231116_com.android.gallery3d.jpg
    Screenshot_20200626_231116_com.android.gallery3d.jpg
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Markjduk said:
Use the logic probe to check the reset line on the U15 6808 CPU - PIN 40. When you power the game on, pin 40 should be low for a second, then go high. If the signal goes low then high repeatedly the game is trying to reset itself over and over.
Click to expand...
I did already this and it was low less than a sec after was high.
I also checked the colck signal on pin 39 it was pulsed
 
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