John's Arcade Forum - Classic Arcade and Pinball Collecting and Restoring Discussion Forum - RETRO MAME - Nintendo Vs Forum
November 23, 2024, 10:01:12 am *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Welcome to the John's Arcade Forum. Glad you made it! Smiley
 
   Home   Help Search Calendar Login Register  
Pages: [1]
  Print  
Author Topic: Ms. Pac-Man - no sound, hum coming from monitor, looks like 3's  (Read 4478 times)
0 Members and 1 Guest are viewing this topic.
WindowsLM
Newbie
*
Offline Offline

Posts: 6


View Profile
« on: February 28, 2014, 10:56:09 am »

Well I just received my new machine and of course it couldn't just be plugged in and instantly work everything lights up the marquee the coin lightbulbs and the monitor comes on but there's a hum coming from it and no sound at all.

I took a look at the fuses and one of them looks like it might be blown but I'm about to go by a voltmeter to verify.  Also it looks like somebody did some solder work on the harness and I don't know if I can pull it off without damaging something to try to reseat some connections.

The listing said newly rebuilt monitor and it had pictures of it working.

Attached are a few pictures of the inside.  Any tips or suggestions is appreciated.

EDIT: can't add pictures from my phone very well, and it looks like it flipped a couple of the pictures :/

Image 1

image 2

Image 3
« Last Edit: February 28, 2014, 11:01:23 am by WindowsLM » Logged
John's Arcade
Administrator
Hero Member
*****
Offline Offline

Posts: 2097



View Profile
« Reply #1 on: February 28, 2014, 11:00:35 am »

Well I just received my new machine and of course it couldn't just be plugged in and instantly work everything lights up the marquee the coin lightbulbs and the monitor comes on but there's a hum coming from it and no sound at all.

I took a look at the fuses and one of them looks like it might be blown but I'm about to go by a voltmeter to verify.  Also it looks like somebody did some solder work on the harness and I don't know if I can pull it off without damaging something to try to reseat some connections.

The listing said newly rebuilt monitor and it had pictures of it working.

Attached are a few pictures of the inside.  Any tips or suggestions is appreciated.

Check your fuses then check your voltages. I show in one of my vids how to test a Pac-Man's voltages.
Logged
WindowsLM
Newbie
*
Offline Offline

Posts: 6


View Profile
« Reply #2 on: February 28, 2014, 12:58:33 pm »

Everything looked ok, reseated the fuses and cleaned them off a bit and it came right up.

The monitor needs to be adjust a tad still do to a minor wave in the monitor and a small overrun at the top but decent picture.

Might have to replace the joystick because it's a bit too loose for my liking but overall I can't complain.

John,

Do you know if there are different builds for Ms. Pac-Man that the person before me might have burned off?  This is the speedy version.  But it is playing like the 'hard' difficulty settings on a 20th or 25th anniversary cabinet.  I couldn't find too much information on it though.

Logged
jasonsmith
Full Member
***
Offline Offline

Posts: 216


View Profile
« Reply #3 on: March 04, 2014, 01:11:43 am »


Might have to replace the joystick because it's a bit too loose for my liking but overall I can't complain.


My joystick was sloppy as well, picked up the proper grommet from eBay and it's awesome now. I think Mikes Arcade may have them as well. The original joystick is quite nice so they all say, do what you can to save it.
Logged
lordkahless214
Full Member
***
Offline Offline

Posts: 226



View Profile WWW
« Reply #4 on: March 09, 2014, 07:39:08 pm »

Do you know if there are different builds for Ms. Pac-Man that the person before me might have burned off?  This is the speedy version.  But it is playing like the 'hard' difficulty settings on a 20th or 25th anniversary cabinet.  I couldn't find too much information on it though.



There is a difficulty jumper on the board. you can check if it's been shorted to make the game harder, here is a photo from the manual



If it has been shorted you can remove the solder to restore the game to default difficulty, if it's not shorted, then there may indeed be a different rom set on the board


Logged
lacerta1974
Jr. Member
**
Offline Offline

Posts: 58



View Profile WWW
« Reply #5 on: May 01, 2014, 10:57:46 am »

John... Do you know which video in your series shows you checking pac man voltages?  I just picked up a ms pac man that was working for 2 days really nicely then stopped all of a sudden.  All I get is a quick flash on the monitor then no sound or game play.  Started checking the ps, fuses, power to the board, etc.  This is my first time really doing this. 
Logged
John's Arcade
Administrator
Hero Member
*****
Offline Offline

Posts: 2097



View Profile
« Reply #6 on: May 01, 2014, 11:19:52 am »

John... Do you know which video in your series shows you checking pac man voltages?  I just picked up a ms pac man that was working for 2 days really nicely then stopped all of a sudden.  All I get is a quick flash on the monitor then no sound or game play.  Started checking the ps, fuses, power to the board, etc.  This is my first time really doing this. 

This one:

https://www.youtube.com/watch?v=rQEXAnsEQ9o
Logged
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Install Simple Machines Forum Valid XHTML 1.0! Valid CSS!