Has it always been that way, or is this a new problem?
Have you removed the connectors in the lower right corner of the driver board?
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com -The Place to go for Pinball Repair Info

OK...so every controlled lamp in the backbox appears to be 1 off?
And, all of the backbox lamps will light at some time during test?
If it were a misplaced connector, then 1 out of every 8 lamps would fail to light. Probably 2 since the key pin would be involved.

Do the lamp matrix connectors look like they are still factory pinned? The lamp matrix connectors will have red wires and yellow wires in the connectors.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

The safecracker game backboard lights are a little weird and not a conventional switch matrix. only the playfield lamps are controlled by the lamp matrix.

There are 4 solenoid lines that are used as data lines (2 data, clock and enable) to drive some chips on the backboard light boards. and 3 of the GI strings are used as power.

The chips daisy chain the signals, so I think if one is missing or broken it might confuse the rest down the line.

I knew of one in Arizona that had the same issue (might be the same game) but I never had a chance to work on it to figure it out.

no idea. How many lamps are wrong?

I just went through mine. Everything matches until I get to L47. L46, 45, 44,43,42,41 are all off. I would think this is a software problem. My machine has original untouched boards.

Bad terminology ,they are not all off but what is displayed on the DMD does not match what is lit on the back box.

unless you have the one from Arizona, counting generalgman's game and yours that is 3 SC with the exact same lamp issue. Got to believe it's a software problem.

A YT video of the "issue" or "feature" would be nice.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

I'm running v 1.8. I can record a video of mine doing this.

I have heard of safecrackers having issues after the ICs on the backbox lamp insert get damaged. I don't think it's a software problem, as I've had 2 that worked perfectly.

My backbox lamps work perfectly when it goes into the boardgame mode. You would think if the chip was damaged then you would have lamps lit in the wrong sequence when attempting to get into the vault. It is like the programmer missed the description of the insert.

So when you are in the board game mode and you roll the dice for your moves, do the lamps sequence in the correct order towards the vault ? If you land on , say a bribe lamp, does the machine perform the correct action ( guard asks for money ?)

Interesting problem.
Unfortunately, the copy of the schematic in the IPDB is really poor. I can't make out the part numbers.

If you can post a pic/scan of pages 3-21 and 3-22 in the manual, that would help.
The 48 lamp control board in the backbox connects to driver board connections:
J110 - special purpose lamp controller (used on AFM for the saucer chase lamps)
J138 - 12V power and ground
J106 - GI power
Transformer secondary - GI power

The board has 48 Darlington Transistors of some sort (I can't read the schematic) which are sequenced by an IC that might be a 4094 (again...can't read it) which is a shift register (which doesn't make sense so maybe it's not a 4094).

The board appears to operate more like a Gottlieb System 80 driver board or a Bally lamp driver board.

If someone can post good images of the manual's pages noted above, we can provide more info.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charternet/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

A shift register sounds right since the data coming in is only 4 lines and I think work like the LED's in the newest Sterns and JJP's pins.

Look on the parts pages of the manual and you can find the parts for the backbox light board (page 2-14)

U2-U7 are indeed 4094's
U1 is an lm339

Qi-Q48 are 2n6426 NPN Darlington transistors

Here is the information from my manual. The schematic print is very small so I have taken numerous pictures close up so you can read the values.

image.jpg

image-598.jpg

image-544.jpg

image-512.jpg

image-506.jpg

image-516.jpg

image-716.jpg

image-575.jpg

image-869.jpg

Thanks for the images.
I'll need to look at the function of a 4094, and how it's integrated into that lamp control system to see if the "one off" observation could be caused by a failure of this system.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

Now like I had said in one of my earlier posts that my back box lamps are all correct except for L42 through L48. If you look at the 4094, it looks like each IC controls 8 lamps in the board. I bet I have one damaged IC as well.

Sounds right.
You may be able to use the diode test, as outlined in the Wiki, to figure out which one is different and failed. Or we might be as to ID the one that controls those lamps via the schematics.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

I think these work as a series, If one is missing or broken it moves all the other lamps ahead in the chain. So probably not all are bad in your machine, just an earlier output than the other posters in this thread.

The 4094 IC's that are on the back board are a CMOS Chip. These are easily damaged from static electricity. I'm wondering if these IC's get damaged from wiping down the plastic coin tubes with a cloth and the static generated getting transferred to the chips. The plastic coin tubes are very close to this board. I'm going to order some 4094's and will change out the one I think that is punched.

You should haul the board out and conduct the diode test on each of the 4069 ICs.
If I had the board here in my shop, that's the very first thing I would do.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWik.com - The Place to go for Pinball Repair Info

Here ya go...
http://www.pinwiki.com/wiki/index.php?title=General#Testing_an_integrated_circuit
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

Ok, I have the same issue, board game out of sync, had the lamp board sent out & checked/tested, There wasn't really much wrong with it, all chips tested ok, repairer guy punched out old chips & fitted sockets, Anyway put board back in problem was fixed in one area but same issues popped up in other area, Lucky for me board had been socketed, Was advised to replace all 6 X 4094's & that has fixed the problem, old chips bench tested ok buy were flaky,

I'm very happy now, game works spot on, Thanks to the community here & especially Ken from AA

Let us know how you go