Atari System 1 Indy Jones speech missing, music bad, all fixed, follow up log

Follow up to my post. Thanks for the suggestions. I noticed that Road
Blasters has the TMS5220 chip. I pop the Road Blasters cartridge into my
cabinet and in self test, all sounds, including speech work fine. This
verified that my main board was good. I swap out the TMS5220 from the known
good Road Blasters to the Indy Jones. Same problem, no speech. Just on a
hunch, well more like I didn't have anything better to do, I swap the 6522
that sits right next to the TMS5220 from the known good Road Blasters to the
Indy Jones and bingo, problem solved, speech. The TMS5220 was good after
all.

I also found the "music bad" problem I was having were the notes weren't
playing like MAME. One of the transistors on the Audio/Reg board was out,
so I was only getting sound out of one speaker, which in self test, I
skipped every other note, so MAME was playing 16 and on my game I was only
getting 8. Swapped audio regs and problem solved (yes I know I could
replace the transistor, but easier and quicker to just swap the whole board
and tag the bad one with the problem).

Thanks for the help and pointers you guys.

Joe (joemagiera at ameritech dot net)

joemagiera@ameritech.net

  _____

From: owner-rasterlist@vectorlist.org
[mailto:owner-rasterlist@vectorlist.org] On Behalf Of Jess Askey
Sent: Thursday, February 12, 2009 2:34 PM
To: rasterlist@vectorlist.org
Subject: Re: RASTER: Re: RASTER: tech: Atari System 1 Indy Jones speech
missing, music bad?

Also, the TMS5220 requires -5V to work properly and the clock spans from -5V
to +5V I believe... so check that out.

peter jones wrote:

 
-----Original Message-----
From: Joseph Magiera <mailto:joemagiera@ameritech.net>
<joemagiera@ameritech.net>
To: rasterlist@vectorlist.org
Date: Thu, 12 Feb 2009 08:19:16 -0800 (PST)
Subject: RASTER: tech: Atari System 1 Indy Jones speech missing, music bad?

 
Testing an Atari System 1 Indiana Jones And The Temple Of Doom. Appears to
play ok, but in self test, the sound CPU is reported good, but on the Speech
Chip Test I get no speech. I tried it in MAME and there are speech clips
played. Any idea which chip on which board at what location is bad? The
other sounds appear to be fine.
 
The one other thing I notice is that in MAME, the music self test appears to
go much quicker and play more notes than my real game, so I might have a bad
music chip too. Can anyone
    

forget mame, it's not always acurate.
the speech is generated by a 28pin texas instruments TMS5220
 
2 things here.
1: indianna was the only sys1 game with speech, so if the boards were
originally something else it may be missing.
2: those chips have a nasty habbit of tarnishing and losing legs.
if you find it the legs will probably look black.
when you take it out of the socket, dont be surprised if you leave some of
the legs behind.
 
in these situations i like to replace the socket with a turned-pin type,
then clean the legs on the chip and fit it in a second turned pin socket
with small wires soldered between the socket & stubs where the legs fell
off.
 
then plug the 2 sockets together.
 
others probably have there own methods - this problem is common in starwars
boardsets.

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Received on Thu Feb 12 22:10:08 2009