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I've ordered caps + wire etc....
Can you let me know what I need to order please, as I would like to also do this. many thanks
Haven't learned it all myself yet, but found this page helpful; http://tiltforums.com/t/guns-n-roses-jjp-rulesheet/6803
Post in thread 'JJP GNR Pinball'
Yeah, you don’t need to know them all. I focus on getting all the Sponsor ones, because all four gets you an extra ball. Before starting an album mode, I‘ll get its patch to make it a bit easier/score more. That sort of thing.
It’s not just the caps that are changed on the new board, apparently. The Buffalo Pinball guys (who have always had good contacts at JJP) were told just replacing the caps gets you 70% there.
Curious to know! Not that any of it would mean much to me.
I’m an enthusiastic amateur mate so maybe better following the advice of the Paul and Calimori.
I believe from reading ….the additional resistors on the new board are there to accommodate different pins/games which need them hence why loaded. — GnR does not use the additional resistors.
FAQ
1) What does the mod do?
This mod doubles the capacitance of the 70 Volt power supply, which provides extra power to drive the high power coils (including the flippers.)
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2) Does it work ?
Yes. See the above mentioned thread for the experiences people have had with the update.
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3) Is it hard to perform the mod yourself?
Soldering rework experience is needed, and care must be taken to not damage the through hole plating while removing and installing the Capacitors. If you are not comfortable with this, I highly suggest that you do not try to do the mod yourself.
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4) Are any other changes that were made on the new board required on the old board?
No additional changes are needed. The new capacitors simply allow more energy to be stored, they do NOT change the voltage level of the supply, so all existing circuitry is unaffected. See 4A for a deeper technical explanation.
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4A) What changes other than the capacitors, were made on the new IO board
Comparing the schematics of the 70 volt power section of the IO board between Dialed In (which uses the older board), and Godfather (which uses the newer board), there was a change made to the value of the resistors that power the 70 Volt indicator LEDs.
Old Board: R701, R702, R724 - R728 are 6.8K 2Watt resistors
New Board: R701, R702, R724 - R728 are 10K 2Watt resistors
This results in the following current levels for the indicator LEDs
- Old board: indicator LEDs are being driven with ~10 mA of current (70-2 / 6800) (This does NOT change based on the capacitor upgrade since the Voltage remains the same at 70 V)
- New board: indicator LEDs are being driven with ~6.8 mA of current (70-2) / 10000)
Assuming a standard LED like this: https://www.mouser.com/datasheet/2/239/lite-on_lites11002-1-1737435.pdf, both of these current levels are well within the standard operating region of the LED:
Intensity vs Current (resized).png
What does this all mean...
- The Indicator LEDs on the new board won't be quite as bright as the older boards.
- The resistors on the new boards will create less heat than the ones on the older boards.
- The capacitor change on the old board does not affect the indicator LEDs in any way.
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5) What do the Hour and Temperature ratings mean on a capacitor ?
- Both of these values are used to calculate the life span of the capacitor.
- The general rule is that the lifespan of a capacitor doubles from its rated life for every 10° C decrease in operating temperature below the rated temperature.
- As an example, the capacitor used in the FlipMods kit is rated for 3000 Hrs at 85° C
- Playing my Dialed In for an hour straight, the temperature of my capacitors were 36° C ( lets say 40° C for this example)
- Using the capacitor life calculator here: https://eepower.com/tools/electrolytic-capacitor-life-calculator
- that works out to an expected life of 96,975 hours !
- As a worst case scenario, At 50° C (122 F) the life would be 48,487 hrs (2,200 days) of continued use.
capacitor life calculator (resized).png
6) Is the performance of other coils improved with this mod?
This mod supplies more power to all the 70 Volt coils on the game. You can look in the manual to see what coils are driven by 70 Volts. For Dialed In, almost all the coils are driven by the 70 V supply including pop bumpers, magnets, scoop eject, ball launch, etc. I definitely noticed improved responsiveness on these coils. In fact, the only coils not affected on Dialed In are the slingshot coils and the station lock release which are driven off of the 20 Volt supply, which is not enhanced by this mod.
On Guns & Roses, all coils are 70 Volt except for the slingshots.
Review from a Dialled in owner : Def a diff'rence, I'd say a big one.
Flippers stronger, can make a lot more shots. More quick ricochet shots, easier backhanded left ramp from stop or moving, right ramp for sure gets moving in a hurry.
Just all around a better feel.
Jury out on SIM card shot. As I said before I thought it would be worse, and at first I felt no real diff'rence; but I did start draining some at the end and was up to 6x in my 3rd gameput a pin in that one and see settings below.
Sneaking past diverted 3 times for SIM was MUCH easier; Like a real live playing machine.
I’m in
sign me up for the installed option for DI
I'd be up for a kit for Dialed In Paul, see you at my league meet if not before at the club ( if they're ready by then )
Interesting point.
Yeah, mine’s still fine.
I wonder if they fixed issue then
Mebbe. Although it’s a CE, so relatively early in the run.
pinside.com
