Star Wars - Missing certain sound bytes

mattmatt

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On my Star Wars, I'm missing certain sound bytes. Noticeable on first wave of tie fighters. Darth Vader bytes are missing. On trench, Han Solo missing. And some of what Luke says.
Thanks for the help!
 
On the Sound PCB.. If you jump TP7 (self test) to a ground point, the sound board will go through all of the sounds.
I usually do this test in test mode after skipping past the whop whop whop test screen.
You will hear all of the generated sounds and the voices.
If all the voices are missing, it can be a few things..
But this is the easiest way to check.
 
On the Sound PCB.. If you jump TP7 (self test) to a ground point, the sound board will go through all of the sounds.
I usually do this test in test mode after skipping past the whop whop whop test screen.
You will hear all of the generated sounds and the voices.
If all the voices are missing, it can be a few things..
But this is the easiest way to check.
Thanks.
I followed your advice (page 3 of troubleshooting guide (sp225)) and here are the results:

Sounds played on 5D, 4D, 3D. But on the 2D test I got no sound
After this, I continued grounding, and got all the sound bytes to work-- Including the Darth Vader and other sounds missing in the gameplay.
So I have all the sounds, but it seems like some aren't getting called, or passed on during the game.
Attached is a photo of 2D. Has some slight corrosion. I haven't pulled the chip yet to clean legs... wanted peoples input prior to messing with it.

Thanks for any help on next steps.

cc @blown23t , @andrewb , @Jaydon @tstone
 

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That is a Pokey, Common failure point. All 4 are interchangeable. So if the one at 2D is bad, you can pop in the one from 3D.. If the missing sounds appear.
You need a new Pokey.
If you have any other Atari games - you can borrow one and swap it in to see if you get all the sounds.
 
Ok,
Sorry about the delay.
I followed your advice and found that the the pokey in slot 2d works in 4d. Also swapped a known good pokey from another game into 2d.
So it looks like the pokey is good, but maybe something to do with slot 2D?
When I re-ran the sound test I only get the very first tone of the quadruple tone, so only a single note.
Attached are photos of the sound board, and top and bottom of socket...
Thanks for all the help
cc @blown23t @andrewb @Jaydon @tstone
 

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Hello. I'm trying to wrap my head around what is going on. Can you please clarify something? You ran the sound test from this page.

Screenshot (92).jpg

And you had all the tones except the 4 note 4 pulse scale associated with the Pokey at 2D. After playing musical chairs with the Pokeys, now you are only getting the first tone of the 4 note scale from 5D. Does that sound right?

What happens when you put the Pokeys all back to their original positions? Can you recreate what you were originally getting, all tones except the one at 2D?
 
Hello. I'm trying to wrap my head around what is going on. Can you please clarify something? You ran the sound test from this page.

View attachment 835109

And you had all the tones except the 4 note 4 pulse scale associated with the Pokey at 2D. After playing musical chairs with the Pokeys, now you are only getting the first tone of the 4 note scale from 5D. Does that sound right?

What happens when you put the Pokeys all back to their original positions? Can you recreate what you were originally getting, all tones except the one at 2D?
Hey thanks.

Ok, I re-read my explanation and it is not very clear.

Initial state:
Performed sound test and 2D isn't working - single ping - no 4 quad tone

I Swapped 2D pokey to slot 4D. Now, the 2D pokey works in slot 4D but slot 2D still doesn't work even with known good pokey installed
Also, I tested another known good Pokey from another game in Slot 2D just to be sure

With good pokeys in all slots I re-ran the sound test (table 3, page 3)

Results:
5D: Good (4 long tones)
4D: Good (4 double tones) - (has original chip from 2D insstalled)
3D: Good (4 triplet tones)
2D (Has known good chip installed that was originally in 4D): only get a single ping, then silence ( no 4 quad tones)

Also finished the rest of the test procedure and all the 2 second sound bytes work.


cc @blown23t @andrewb @tstone @lilypad19
 
Hey thanks.

Ok, I re-read my explanation and it is not very clear.

Initial state:
Performed sound test and 2D isn't working - single ping - no 4 quad tone

I Swapped 2D pokey to slot 4D. Now, the 2D pokey works in slot 4D but slot 2D still doesn't work even with known good pokey installed
Also, I tested another known good Pokey from another game in Slot 2D just to be sure

With good pokeys in all slots I re-ran the sound test (table 3, page 3)

Results:
5D: Good (4 long tones)
4D: Good (4 double tones) - (has original chip from 2D insstalled)
3D: Good (4 triplet tones)
2D (Has known good chip installed that was originally in 4D): only get a single ping, then silence ( no 4 quad tones)

Also finished the rest of the test procedure and all the 2 second sound bytes work.


cc @blown23t @andrewb @tstone @lilypad19

Just throwing some ideas out there....

If you have a logic probe, you might want to see what the chip select pins are doing on the Pokeys. Mainly, look at pin 30 on 5D, 4D, 3D, and 2D. Make sure that you are not loosing the chip select signal on 2D after the first tone.

Another idea is look at the output of 2D, pin 37, with the probe. See is the tones are being generated by the Pokey. It is possible that the tone signals are being lost somewhere down the line in the circuit. If you see that the tones are being generated by the Pokey at 2D, pin 37, then there is probably something wrong with the buffer at 3C that is cutting off the signal from the Pokey.
 
Just throwing some ideas out there....

If you have a logic probe, you might want to see what the chip select pins are doing on the Pokeys. Mainly, look at pin 30 on 5D, 4D, 3D, and 2D. Make sure that you are not loosing the chip select signal on 2D after the first tone.

Another idea is look at the output of 2D, pin 37, with the probe. See is the tones are being generated by the Pokey. It is possible that the tone signals are being lost somewhere down the line in the circuit. If you see that the tones are being generated by the Pokey at 2D, pin 37, then there is probably something wrong with the buffer at 3C that is cutting off the signal from the Pokey.
Jaydon,
Ok, finally got a minute to work on this.
on pin 30, on the tones test, the signal goes from solid high, to the fast oscillating - It does this on 5d,4d,3d,2d,
On pin 37 of 2D, for the quad tone test, it goes from nothing (not high, not low, just dead) to low during the tone generation time, to dead(when the tone generation is done)
-- On this, prior to running the test, when I put the probe on pin 37, I get a high signal for about a second, then it drops to dead
-- Pin 37 on 5d,4d,3d all show high before and during the test.

Thanks for all the help.
@blown23t @andrewb @tstone @lilypad19
 
Jaydon,
Ok, finally got a minute to work on this.
on pin 30, on the tones test, the signal goes from solid high, to the fast oscillating - It does this on 5d,4d,3d,2d,
On pin 37 of 2D, for the quad tone test, it goes from nothing (not high, not low, just dead) to low during the tone generation time, to dead(when the tone generation is done)
-- On this, prior to running the test, when I put the probe on pin 37, I get a high signal for about a second, then it drops to dead
-- Pin 37 on 5d,4d,3d all show high before and during the test.

Thanks for all the help.
@blown23t @andrewb @tstone @lilypad19

I hate to say this. But this first thing that should be done is the replacement of all the sockets on that board and the cleaning of all the legs on the socketed chips. Once any possible connectivity issues has been eliminated, we can see if there is an actual faulty IC somewhere on the board.

Sorry to be the bearer of bad news.
 
I hate to say this. But this first thing that should be done is the replacement of all the sockets on that board and the cleaning of all the legs on the socketed chips. Once any possible connectivity issues has been eliminated, we can see if there is an actual faulty IC somewhere on the board.

Sorry to be the bearer of bad news.
Ok. well. It is what it is. I will start on this and report back in a few.
Thanks
 
If you are in Southern California, bring it over to my place. We can get those sockets swapped, verify the Rom's, and test the Ram.
Hey People,
Ok. So.
New sockets on Sound ROMs, Checksums good - no change
New socket on RIOT, no change
Replaced the opamps @3c & 4c - Bingo.

Thanks for everyone's help!

@blown23t @andrewb @tstone @lilypad19
 
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