New Life Games LLC

NLG Users Repair Logs and Other Ramblings. Request your very own topic. Just ask any site staff. => Channelmaniac's Arcadecomponents' Old School Repair Logs => Topic started by: channelmaniac on May 07, 2014, 08:15:16 PM

Title: Williams Games
Post by: channelmaniac on May 07, 2014, 08:15:16 PM

Model: Hit the Ice
Symptom: Dead

Board arrived with a description that 2 caps had blown up when inserted into a cabinet. User replaced the caps but the board was still dead.

Removed 2 shorts between +5v and Ground where the user replaced the caps. Tested board. Both blown caps were on the -5v line which is needed for the sound section on this board. Advised customer to check for miswiring in the cabinet.

Title: Re: Williams Games
Post by: channelmaniac on May 07, 2014, 08:15:28 PM

Model: High Impact Football
Symptom: Missing colors

Fixed multiple bent pins shorting the dual port video RAM. Tested.

Title: Re: Williams Games
Post by: channelmaniac on May 07, 2014, 08:15:43 PM

Model: High Impact Football
Symptom: No sync on video and no sound

Replaced bad 74LS86 to fix horizontal sync issue and bad 3.579545MHz crystal on the audio board. Tested.

Title: Re: Williams Games
Post by: channelmaniac on August 30, 2015, 04:02:03 PM

Model: Moon Patrol
Symptom: No sound.

Replaced missing 3.579MHz crystal and 4 broken capacitors on the sound board. Replaced 3 broken PCB standoffs and tested.

Title: Re: Williams Games
Post by: channelmaniac on March 25, 2018, 09:00:23 PM

Model: Moon Patrol
Symptom: Dead. Power supply shut down.

Replaced a shorted tantalum capacitor on the sound board's -5v rail and board came up but with severe player / enemy sprite corruption. Replaced a bad 2114 RAM at 7L on the middle board and tested.

Title: Re: Williams Games
Post by: channelmaniac on January 03, 2022, 11:18:27 PM

Model: Moon Patrol
Symptom: Lines in background graphics

Cleaned the legs of the graphics ROMs and tested.

Title: Re: Williams Games
Post by: channelmaniac on March 19, 2022, 07:44:59 PM

Model: Galaxian
Symptom: Error message flashes on screen

Replaced bad ROM U and tested.

Title: Re: Williams Games
Post by: channelmaniac on July 29, 2022, 10:24:37 PM

Model: Trog II
Symptom: Dead, garbage on screen.

Verified U99 and security IC. PCB seems to be the wrong one for the game - Horizontal blanking signals are on different pins of a PLA chip than what the schematic shows. Swapped out main board for a parts replacement and reset the jumpers on it. No sync. Replaced bad DSP CPU socket. Tested.

Very odd but very fun game! Got lost in testing. :)

Title: Re: Williams Games
Post by: channelmaniac on April 23, 2023, 02:37:08 PM

Model: Ms. Pac Man
Symptom: Sparkles on screen. Player graphics distorted.

Replaced LS161 clock divider, LS368 clock generator, and LS107 clock divider to get the screen sparkles resolved. Replaced the GTE 2114 RAM chips to fix the player graphics distortion. Tested.