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Messages - kralleman

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16
Arcade Lifestyle / Re: Roadtrip 6/1-2017 Atari Dominos Pickup for Kralleman
« on: February 14, 2017, 11:38:38 PM »
A small update: tried replacing the 7432 @p3 but it did not change anything. Will have to allocate some more time for this pcb soon.

17
Arcade Lifestyle / Re: Pinges Playchoice-10 cabinet and games.
« on: January 25, 2017, 12:40:20 AM »
It is indeed an impressive collection of PC-10 games! Thanks for pulling out the monitors :)

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Arcade Lifestyle / Re: Roadtrip 6/1-2017 Atari Dominos Pickup for Kralleman
« on: January 25, 2017, 12:34:56 AM »
Thanks for the input! I am in no hurry so no rush in digging through the manual. I am just thankful that you want to juggle this problem with me at all :) I will go back to the manual myself and have a look.

I double checked the line now to see if it was shorted to 5v or anything nearby. I couldn't find anything in between the 7432@P3 and the 9301@D2 that it was shorted to. I also checked the 7432 to see if it was maybe internally shorted and same with the 9301-replacement. No shorts there either. The 7432@P3 is a bit burnt on its legs, could it be bad without showing a short between pin 10 and any other pin?

I gave the pins of the ROM and the pins of the 7432 some love now too. I'm finding that a fiberglass pen is great for that sort of cleanup tasks. Board is still showing same symptoms though.

Also worth mentioning is that I have this rigged to a switching ps on my test bench and that I am only supplying the PCB with +5v from that (i.e. no 12v or -5 or anything like that is connected). I'm pretty sure that I looked at the schematics to verify that no odd voltages should be required for these parts of the circuits.

19
Arcade Lifestyle / Re: Roadtrip 6/1-2017 Atari Dominos Pickup for Kralleman
« on: January 23, 2017, 11:45:48 PM »
I got the replacement for the 9301 from Smarty today! Thanks a lot, I owe you! :)

Unfortunately, my problem persists after I swapped the 9301@D2 for the new replacement. The output from pin 7 is still high which in turns pulls the output at pin 8 from the 7432@P3 high. The inputs to the 9301 (as well as the new replacement) at pins 1, 2, 14 and 15 all have clean pulses when I look at them with a scope. I'm confused. Could the clean-looking pulses coming into the 9301 be incorrect?

EDIT: Actually, the signals of the pins 1, 14 and 15 (the three that have signals coming from the 6401(?) decoder) of the 9301 all look very similar in when looked at in a scope. The signal on pin 2 (the one marked R/W) is the only one that differs. It looks to me that at least one of the three signals coming from the decoder needs to differ in order for pin 7 of the 9301 to ever go low. For pin 7 to go low, if I understood the datasheet of the 9301 correctly, the following needs to happen:

Input Pin1: Low
Input Pin2: High (the only one with a signal that seems to differ)
Input Pin14: Low
Input Pin15: High

As it looks right now, pins 1, 14 and 15 go low at the same time and high at the same time. Then again, my scope is from the seventies or something and the picture isn't the sharpest :)

20
Arcade Lifestyle / Re: Breakout Consolettes?
« on: January 12, 2017, 10:00:39 PM »
Etienne: I have not tried to fiddle with the yoke except for the positioning rings (I guess they're not called convergence rings on a B&W?). I will see if I can spend some time with it this weekend.

Spectroman: Thanks! Yeah the picture is probably a bit too expanded. I have been able to tune that though but the bent walls remain... Hmm..

21
Technical Area / Re: Another Super Breakout PCB repair (Bonanza Enterprises Clone)
« on: January 12, 2017, 09:50:20 PM »
The 9301-problem really is similar to my Dominos. I should've read this thread first :) Great job!

22
Arcade Lifestyle / Re: Roadtrip 6/1-2017 Atari Dominos Pickup for Kralleman
« on: January 12, 2017, 09:44:14 PM »
Quote from: smarty on January 12, 2017, 07:09:35 PM
...
@Kralleman, You're making progress well done :) So the 7432 at P3 is an or gate, if either input is high you will get a high output, because pin 10 is always high the output will be held high. Like you say tracing that back to the 9301 at D2 show all of those input signals on pins 1,2,14, & 15 are pulsing it is highly likely D2 is faulty. You'd really need a logic analyser to confirm the timing of the input signals which should trigger the output on pin 7, be in reality I'd say swap D3 out and forget about needing any higher tech knowledge.

I hooked up my scope and the signals going into D2 are looking like clean pulses (as opposed to just garbage). I have an old logic analyser stashed away in the attic but I have yet to make some room for it and learn how to use it. Saving that for a rainy day :)

Quote
These 9301's are not available anywhere anymore I'd be interested to see what data sheet you found and what that seller was actually selling?

The datasheet was this one and the eBay auction for NOS ones is found here.

Quote
Take a look at my Super Breakout repair thread I just posted in the tech forum. I've had a batch of boards made up to replace the 9301 with a 7442 which is essentially the same device with a different pinout and is readily available, PM me your address and I'll send you a few of them :)

Seriously? Wow that's awesome! PM is coming your way in a minute :) I will read through your SB thread too.

23
Arcade Lifestyle / Re: Roadtrip 6/1-2017 Atari Dominos Pickup for Kralleman
« on: January 12, 2017, 11:57:41 AM »
I only took the PCB with me home and the cabinet is in storage quite far from here. Maybe Pinge who is closer to it can take a photo the next time he's there.

24
Arcade Lifestyle / Re: Breakout Consolettes?
« on: January 12, 2017, 11:55:51 AM »
I tried the rings on the yoke but that didn't really have any effect on the bent lines :( I also played a bit with the pots without results. What I haven't tried is messing with the different adjustable coils. I believe horizontal linearity is one of them I havent tried but it is quite difficult to reach.

25
Arcade Lifestyle / Re: Breakout Consolettes?
« on: January 12, 2017, 12:52:39 AM »
Chassis has been recapped now (both PCBs). I put in caps with identical capacitances as the old ones. The picture is stable and almost good but I'm not satisfied yet. If you look at the picture the top and left walls of the playfield are not straight. It is not like a wave going over the monitor, it's more like the walls are bent. Kind of difficult to take a good photo. Any hints on what I should look for on the chassis? I tried with a different Breakout PCB and get the same result...




26
Arcade Lifestyle / Re: Roadtrip 6/1-2017 Atari Dominos Pickup for Kralleman
« on: January 12, 2017, 12:45:35 AM »
Quote from: smarty on January 08, 2017, 08:23:38 PM
Quote from: kralleman on January 08, 2017, 01:55:42 PM
I had some time yesterday to look more into the pcb troubles. When plugged in, the screen shows garbage letters and digits. The watchdog is barking at the 6502 as often as it can so the CPU is being constantly reset. There seems to be activity on all address and data lines, both on CPU side of things and on RAM/ROM side. I can't see any stuck pins on ram/roms. One is floating on one of the rams but it's not supposed to be connected to anything. I tried replacing the cpu but it did not help. I only used my logic probe yesterday but I guess I need to start scoping things out. I might also try to disable the watchdog just to see what happens. There's no watchdog disable signal on the schematics but I guess I could just tie the output to gnd (it's then inverted before reaching the cpu), or?

The roms seem to be mask roms. I don't have the board nearby atm and don't quite remember the model. Anyway, I bet my shitty eprom programmer won't be able to read them.

Rams are 2102a. I don't have any spares or otherwise I wouldve tried piggybacking.

The problem with the reset is present both when test mode is on and off so I guess it's related to something early on in the boot process. I'm not sure what roms are responsible for what.

I just had a look at he schematics and they’re very similar to other Atari games of this era. Take at look at the 3901’s at F2,D2 and E8, I’ve seen those all have a high failure rate, outputs usually stuck high or showing no signal, they control the Prom select lines & part of the reset circuit amongst others. These 3901’s all being faulty will contribute to the CPU watchdogging.

Also going from my previous repairs, if the RAM’s are made by NEC i’d also say there’s a high chance they will be faulty.

Reading the MAME source file Roms at D1 & E1 contain the CPU program.

EDIT, if you have the prom version of the board they are locations at L1,L0,M1,M0,N1,N0,P1,P0. This is very similar to a Super Breakout board in PCB layout and design.

Good luck with the repair.

I finally got some time to sit down with this. The timer reset signal (outputted from pin 12 on the 9301@E8) is constantly high. It should be pulsing in order for the watchdog to stop barking. I'm not sure if it's the 9301 itself that is bad or the input that is provided to it. Input pins 1, 14 and 15 are pulsing with nice pulses, but input pin 2 is constantly high. Tracing that one back to pin 8 of the 7432@P3, I see that the WRITE signal coming in at pin 9 is pulsing nicely but the input at pin 10 of the 7432 is constantly high. This one is outputted from the 9301@D2 (pin 7) which is indeed outputted constantly high. All the inputs (pins 1,2,14 and 15) of the 9301@D2 are pulsing nicely.

It seems as if the 9301@D2 is bad, but then again, I find that datasheet a little bit difficult to look at (I am still quite a newbie when it comes to TTLs).

So... Ehm... What do I replace those with? I found one seller on eBay that had some in stock but if it is possible to get a hold of some without having to wait for the overseas shipping and spending those ridiculous shipping costs it would be awesome :)

27
Arcade Lifestyle / Re: Arcade Pickup Pinge & Kralleman Sweden November 2014, SI, Paddle Battle
« on: January 09, 2017, 05:53:26 PM »
Some more pics. Even though only two cabs were picked up during this roadtrip, we went back for most of the rest later on. Unfortunately some cabs had already been sold when we got back. Now there's nothing more to buy from this old operator. In total we bought the following games:

- Space Invaders
- Paddle Battle
- Astro Blaster
- Frogs
- Super Highway
- Crashing Race
- Trak-10
- Lemans (in a Trak-10 cabinet)
- Kasco Gunsmoke
- Kasco Bank Robbers
- Model Racing Daredevil
- Midway Racer
- Sprint x3
- Taito Blue Shark
- An old Sega slot machine
- 2x pachinkos

And also the Galaxian and Asteroids cabinets that came from this guy in the beginning.


Kasco Gun Smoke


Kasco Bank Robbers


Sprint cabinets (there were actually three of them), original hardware but cabs were built in Gothenburg, Sweden.


Japaneese Breakout cocktail:


Pinge considering buying that nice Paddle Battle


We picked up the SI and at a later stage also the Astro Blaster. The SI 2 was gone when we got back though :(


Gremlin Frogs x2


And a Sea Wolf 2:


Moon Cresta:


Taito Blue Shark:

28
Arcade Lifestyle / Re: Roadtrip 6/1-2017 Atari Dominos Pickup for Kralleman
« on: January 09, 2017, 05:29:56 PM »
Just adding some more pictures, mainly to test how well it works to attach pictures from google photos and to prove that Pinge was also there :)










The PCB had several patch cables:

29
Arcade Lifestyle / Re: Roadtrip 6/1-2017 Atari Dominos Pickup for Kralleman
« on: January 09, 2017, 12:34:10 AM »
Hehe yes I'll do that :)

Smarty: thanks a lot for looking at the source and schematics. I will get back to the board this week and will definitely check out those 3901 and the proms. I have the prom version though so not sure exactly what roms contain the first part of the code. I guess it's a rather early cab as the serial number is 660.

30
Arcade Lifestyle / Re: Warehouse Loot with Pinge & Kralleman 1/10-2016
« on: January 09, 2017, 12:26:24 AM »
Ah nice info. We have a non-working Daredevil (http://www.tilt.it/deb/modelracing-en.html#daredevil). Chassis is burning a resistor. Not sure why. The chassis is made by Model Racing too and we only have parts of the schematics (in italian). Boards have been tested against an external monitor and seem to be working. The cab has been put in the "i will deal with that in the future"-pile.

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