(Topic ID: 216548)

Time Warp - no sound

By boostedskex

1 year ago

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  • 37 posts
  • 6 Pinsiders participating
  • Latest reply 1 year ago by boostedskex
  • Topic is favorited by 1 Pinsider


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#1 1 year ago

Hi guys. I have been fixing a few issues with the help from Pinsiders. Im down to one last issue with the game and that is it doesnt have any game sounds.

What i know:

- the board is functional. I put it in my Flash and it worked perfectly.

- the test button works and produces the testing sounds when the machine is powered on.

- grounding out the transistors on the MPU does not create the sound.

- wires from mpu plug to sound board plug are in good condition.

- this is driving me crazy and i need your help.

#3 1 year ago
Quoted from barakandl:

With the game powered off and the dmm set to diode test, red lead on ground and black lead probe all the solenoid driver transistor tabs that are used for the sound board to see if any are shorted to ground.

What should I see when doing this if one of them is grounded out? I will do this test when I get home.

#4 1 year ago

I went through every transistor on the MPU board. All were reading from 425-499 except one that read 5. Is this the issue? I attached a few pics.

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#6 1 year ago

I replaced that transistor and the pre-driver and I am now getting a reading. Started the game and I still do not have any sound effects. Thanks for your help!

#7 1 year ago

I can't figure this out. Anyone have any other ideas?

#9 1 year ago

Yes, i tried the flash sound board in Time Warp. This leads me to think that it is not the sound board itself.

The 40 pin connector was also replaced. I have not done anything with chips on the boards.

#10 1 year ago

is there a specific chip on the MPU or CPU that drives the sounds that I should try to replace?

#12 1 year ago

I powered the game on and started a game. I pulled the plug from the sound board and as soon as I plugged it back in it started to make a beep. beep. boop. kinda sound that lasted a few seconds. I pulled the plug and then plugged it back in again and it made the same beeps.

I pulled the plug from the sound board again and touched the pins with a grounded wire and it did not make any sounds so I plugged it back in. I then pulled the plug from the MPU and touched the pins with a grounded wire and some of them made a sound when I did that.

My thought is by ground the pins I am sending a signal to the sound board and it makes a sound. Why is the MPU not doing that?

#14 1 year ago

will do. Ill take them shortly. I did swap in the sound card from my Flash that works as it should in Flash but doesn't work in Time Warp

#15 1 year ago

Here are some pics. Let me know if you need to see something else/better.


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#16 1 year ago

tips... advice... hints....something. All of the help has been great so far.

#19 1 year ago
Quoted from someotherguy:

In the close-up picture of the connector on backside of the board I see several bad solder joints.

I also noticed that and resoldered them while i had it out. Still no luck with it.

#23 1 year ago

I will check this now and report back with my findings.


#24 1 year ago
Quoted from Schwaggs:

With the machine powered up, and everything connected, measure the voltage from the solenoid transistor tabs to ground. (Q31, Q33, Q35, Q37, Q39)

I set my meter to VAC 200

Q31 = 9.9
Q33 = 9.9
Q35 = 9.9
Q37 = 9.9
Q39 = .6

I found IC3 and IC4 but where do I find info on pin identification? I will continue to search.


#26 1 year ago

VDC readings:
Q31 = 4.95
Q33 = 4.95
Q35 = 4.94
Q37 = 4.94
Q39 = .61

I have not done anything to Q39 at this point. I will check the voltage on IC3 3,6,8 and 11 now

#28 1 year ago

I will start by replacing the Q39 transistor/predriver

#30 1 year ago

I just finished replacing driver/predriver Q39. My reading is now .64. Just a slight change

i then checked IC4 and got the below readings:

pin 8 = .14
pin 9 = 3.35
pin10 = .08

I greatly appreciate you guys walking me through this to come up with a solution.


#33 1 year ago

I previously reflowed all of the solder on the all of the boards but I will recheck them.

I removed the wiring harness from the driver board to the sound board and inspected all of the wires and female pins in the plugs - All looks great.

I removed plug J3 from the sound board and tested pin 7 and it shows 4.94V. If I put J3 plug back on the sound board and probe the plug from the back it only shows .64 which is the same reading I get down on Q39.

I started rechecking things and I gave you bad info. I mixed up IC3 and IC4 in my above post. My real IC4 readings are:

pin 8 = 2.17
pin 9 = 3.37
pin 10 = 2.23

#35 1 year ago

I just finished testing it again. I performed the test while the game is powered on but in attract mode and i used the board mounting screw as the ground.

Meter set to VDC
pin 8 = 2.1
pin 9 = 3.3
pin 10 = 2.2

#37 1 year ago

I swapped in the MPU from my Flash and played a few games. So much better with sounds/music. Anyone have an MPU board for sale?

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