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 January 10, 2015, 12:02:51 AM

Title: Hoei Games
Post by: channelmaniac on January 10, 2015, 12:02:51 AM

Model: Mayday
Symptom: Random crashing and reboots

Removed a chunk of soldered wire from under the daughter board and tested. Resoldered the large cap on the 12v line and replaced a 10uf cap in the audio section that had high ESR. Retested.

Title: Re: Hoei Games
Post by: channelmaniac on January 10, 2015, 12:03:59 AM

Tip: Mayday pinout

I couldn't find it easily online so I figured it out.

Code: [Select]

Pin:   Top:      Bottom:
1      Blue      Sync
2      Red       Green
3                Speaker+
4      +12v      -5v
5
6      Coin 1    Coin 2
7      1P Start  2P Start
8                Up
9                Down
10
11               FireL
12               Mayday!
13               Thrust
14      FireR
15      +5v      +5v
16      +5v      +5v
17      gnd      gnd
18      gnd      gnd

+12v and -5v MUST be connected to power the 24 4116 DRAMs

Do NOT miswire the +12v and -5v as you'll destroy the 24 4116 DRAMs

FireR is fire to the right, destroying enemies in your path
FireL is fire behind you, destroying enemies coming up from behind