Driver board A-12697-3

0

#1 6 years ago

OP

BEN

Benhurr

Inactive member

Carquefou

7y 30,550 226 1

That my 1st William Demolition Man and got à problem on the driver board...ca you help me...the top right led is not shinning. Does someone know what do I test first

DSC_0046 (resized).JPG

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#2 6 years ago

SDS

whthrs166

Pinside member

Arvada, CO

10y 93,050 4,526 12

That's your 20v power supply LED. It lights up when that power supply is working. Take DVM (Digital Volt Meter) connect on led to ground (there is a ground pin on the power driver board) or a mounting screw for the board and connect the other lead to the 20v power supply lug on the power driver board. It is labeled (very small) next to the lug. See what voltage you have. If you don't have 20v or more than that power supply is not working and you will have to possibly look at the rectifier.

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#3 6 years ago

SDS

whthrs166

Pinside member

Arvada, CO

10y 93,050 4,526 12

Here is the pic of that 20v lug

IMG_1468 (resized).JPG

0

#4 6 years ago

SDS

whthrs166

Pinside member

Arvada, CO

10y 93,050 4,526 12

Check the fuses first. Could be a blown

0

#5 6 years ago

OP

BEN

Benhurr

Inactive member

Carquefou

7y 30,550 226 1

Ok thank's a lot i test the power and don't have the 20V...but what did you call the rectification...is that it?

DSC_0047 (resized).JPG

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#6 6 years ago

OP

BEN

Benhurr

Inactive member

Carquefou

7y 30,550 226 1

What did you call the rectifier ?

0

#7 6 years ago

SDS

whthrs166

Pinside member

Arvada, CO

10y 93,050 4,526 12

They are diodes They are used for rectification from AC current to DC current Check your fuses first. Upper right side of the board. Use the DVM.

0

#8 6 years ago

OP

BEN

Benhurr

Inactive member

Carquefou

7y 30,550 226 1

Already test the fuses..all are ok and i've change 4 big black capacitors and five big grey Diodes but still have the problem..could it came from the parts i take in the pictures that i sent before?

0

#9 6 years ago

SDS

whthrs166

Pinside member

Arvada, CO

10y 93,050 4,526 12

The rectifier for the 20v supply is BR4 and c11 is the corresponding capacitor
as you see here in the schematic Look also for a bad trace in the board burned or broken. Use the continuity tester on your DVM to check the traces.

IMG_1469 (resized).JPG

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#10 6 years ago

SDS

whthrs166

Pinside member

Arvada, CO

10y 93,050 4,526 12

Here is another shot of the drawing

IMG_1470 (resized).JPG

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#11 6 years ago

K K

snowvictim

Inactive member

Warsaw

9y 66,050 549 4 29

Bridge rectifier: Big metal square thing, there are two on the first picture you posted. Replace the right one.
Capacitor: round black thing, also two of them on the first picture. Replace the top one.

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#12 6 years ago

OP

BEN

Benhurr

Inactive member

Carquefou

7y 30,550 226 1

Already done what you say before...thank's you so much for drawing...I Will let you know what it was after check if there's no trace burned on the board.

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#13 6 years ago

SDS

whthrs166

Pinside member

Arvada, CO

10y 93,050 4,526 12

Yeah Cool you can PM me if you need another pic of the drawing.

0

#14 6 years ago

OP

BEN

Benhurr

Inactive member

Carquefou

7y 30,550 226 1

Thank's a lot...I found the problem. The BR4 ground trace who was broken...so the Led is shinning but now i've got another mystake.

It send me all balls but I don't test the contact in the launch rail...

But the big one is that any flipper works... what do I have to test first...searching for the flipptronic II board schematics wires diagrams

DSC_0049 (resized).JPG

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#15 6 years ago

MAT

snyper2099

Cincinnati Pinball

16y 103K 7,653

Test for voltage at all flipper coil lugs.

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#16 6 years ago

OP

BEN

Benhurr

Inactive member

Carquefou

7y 30,550 226 1

So I check voltage on the driver board and i've got only 36volts when it might be 50volts...only 7.2volts comming from the Xformer secondary when it might be 9Vac...9.4Vac when it might be 13Vac and 14Vac normaly 16Vac from Xformer secondary...do not have the schematic of the schematic transformer...could someone send it to me
Thank's for your help

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#17 6 years ago

EMS

emsrph

Pinside member

12y 75,300 1,353 1

This is from Jan 1995 WPC Schematic book. Does it have what you need and legible?

Eric

transformer schematic 1 (resized).jpg

transformer schematic 2 (resized).jpg

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#18 6 years ago

OP

BEN

Benhurr

Inactive member

Carquefou

7y 30,550 226 1

Yes that's what I need but the problem is the sad quality that couldn't be possible to read wires colors...but I think I could find it whith a quick search on web pages
As well thank's for your help.