(Topic ID: 261779)

Jokerz! very low volume speech and no music

By boscokid

11 months ago

Topic Stats

  • 2 posts
  • 2 Pinsiders participating
  • Latest reply 9 months ago by FiatsRUs
  • No one calls this topic a favorite


Linked Games

#1 11 months ago

Have had this game for several years, nothing has recently been done to it and this issue just arose.

At full volume when starting a game "let the game begin" is either at max volume or very very faint. Seems to be very random.. sometimes its loud then pressing for a 2nd player 'deal me in' is faint, other times several of the call outs are loud then it goes to barely audible.

There is no music at all

In test all sounds work but faint and no music works.

What I have done so far:

Reseated all connections
Replaced the ribbon cable with known good cable
Swapped out MPU
Swapped the PS board

On the sound board:

Swapped the 68B09E mpu from U4
Swapped the YM2151 sound from U16
Swapped the YM301 d/a conv from U19

What next? sound board is clean, nobody has ever worked on it.

'faint' sound makes me want to blame the TDA2002s but then why no music at all? I see two on the board. Does anyone know if music and speech go through different ones?

I have schematics, logic probe, meter, soldering station and desoldering station so willing to try anything

2 months later
#2 9 months ago

I have a similar issue with a Jokerz, but my speach works fine and I have no music at all. I did everything you have done and I have swapped out all of the caps, the op amps, TDA2002, etc., etc. Still no music.

A fellow pinsider contacted Coin-Op Caudron and they said they would look at the board, but only if it has no prior work done, which is very understandable since they have no idea the quality of the work and they have to warranty their work. They also stated that they are swamped with board work and you could expect three months at least before getting work done.

Anyone have any help with trouble-shooting these boards? What area and components of the board drives the music?

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