Paperboy - Sound Issues

[kstillin]

I've been trying to fix my Paperboy speech last week, so I have some recent experience with this.

The 'dong' sound on powerup comes from the Yamaha chip I think.
In self-test, the very first test is the sound test. It plays a set of (8?) notes from the music synth chip (Yamaha) that alternates between the left and right channels.

Then it goes through a few tones from the "L POKEY" on one output channel,
then the same notes from the "R POKEY" on the other output channel,
then speech chip says "SPEECH CHIP TEST".

After that, it shows a pair of hex digits that you can vary from 00 to 79h by pushing the handlebars forward or back. You trigger the selected sound with the left 'throw' button.

Exit the sound test with the right 'throw' button.

If you cycle through several more self test screens, it will cycle back to the sound test and do the same routine again.

The sound CPU is a 6502 and there are 3 sound ROMS on row 2 I think. There are several LM324N op amp chips for mixing and filtering.

The CPU, eproms, yamaha, speech, and POKEY chips are socketed, but the op-amps are not. I think the op amps are powered by the + and - 15V supplies.

I hope that helps some. Schematics can be found online.

An oscilloscope works nicely for following signals through the stages.

Kerry

 

[Rhm]

I only see one tms522ocnl . What do i switch it with?

 

[kb0jjn]

Try to swapp the pokey chips around and see if you get some sounds from the board. If that is not the there then you need to look at YM2151. The pokeys are TMS5220. Look over them parts and maybe switch them around. If you get no sound at all then may be the amp. I don't really think it is the amp. as you get some sound from machiene.

They are the TMS5220 and should be in sockets. I am not sure of the board location as I don't have a schematic.

 

[Rhm]

in my sound test, I get no sounds what so ever, It goes left pokey , right pokey, sound and nothing happens till I puch player 2 button and then moves on to other test.

 

[kb0jjn]

I've been trying to fix my Paperboy speech last week, so I have some recent experience with this.

The 'dong' sound on powerup comes from the Yamaha chip I think.
In self-test, the very first test is the sound test. It plays a set of (8?) notes from the music synth chip (Yamaha) that alternates between the left and right channels.

Then it goes through a few tones from the "L POKEY" on one output channel,
then the same notes from the "R POKEY" on the other output channel,
then speech chip says "SPEECH CHIP TEST".

After that, it shows a pair of hex digits that you can vary from 00 to 79h by pushing the handlebars forward or back. You trigger the selected sound with the left 'throw' button.

Exit the sound test with the right 'throw' button.

If you cycle through several more self test screens, it will cycle back to the sound test and do the same routine again.

The sound CPU is a 6502 and there are 3 sound ROMS on row 2 I think. There are several LM324N op amp chips for mixing and filtering.

The CPU, eproms, yamaha, speech, and POKEY chips are socketed, but the op-amps are not. I think the op amps are powered by the + and - 15V supplies.

I hope that helps some. Schematics can be found online.

An oscilloscope works nicely for following signals through the stages.

Kerry

this is worth readin again.

 

[Rhm]

I only see one tms5220cnl

 

[Rhm]

Is there someone I can send these to to find and fix my problem? or someone locally that could come and find and fix on site? or is this some thing we can narrow down and fix posting back and forth?

 

[kb0jjn]

Is there someone I can send these to to find and fix my problem? or someone locally that could come and find and fix on site? or is this some thing we can narrow down and fix posting back and forth?

One of the first things I would try myself is another 6502 cpu chip after checking ALL voltages.

 

[Tribedog]

Paperboy sound

Check out this forum link

http://forums.arcade-museum.com/showthread.php?t=157056

 

[kb0jjn]

Recapping the board is not going to help, the next thing would be to completely rule out the amp by feeding the audio input into an external amplifier - if it still sounds crappy then the audio source is the problem. If the crappyness is gone then the issue is with the amplifier section still.

If its the audio source I would hit up the audio generator chips, any YMs or DACs.

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