Midway Sportstation 25in Conversion Kit Operation Manual

Troubleshooting          6-7
Joystick Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Faulty switchEnter game Menu System by pressing and
holding TEST MODE switch inside coin door.
From Diagnostics Menu, choose SW ITCH TEST.
Operate joystick in question. Check for proper
readings of up, down, left and right.
Faulty switch wiring1.  Check for wires caught in door hinges, latches or
switch contacts.
2.  Verify that harness connectors are attached and
fully seated.
3.  Assure that joystick switches...

Troubleshooting          6-8
Video Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Power problemVerify connection of AC Power to video monitor.
Inspect CRT neck in dim light. Glowing filament
near CRT base proves that some monitor
circuits receive power. Still, voltages or signals
may not be normal.
Faulty wiring1.  Turn off VGM power. Verify that video signal and
Remote Adjustment Board connectors seat
properly on Video Monitor Board.
2.  Assure that video cables connect to circuit
boards.
3....

Troubleshooting          6-9
Video Troubleshooting Table, continued
SYMPTOM CAUSE REQUIRED ACTION
Improper components1.  Verify that hard disk drive is correct for this VGM
(video game machine). Label on drive records
manufacturer name, assembly number and
program version.
2.  Verify that circuit boards are correct for this
VGM. Label on each board records
manufacturer name, assembly number and
hardware version.
3.  Verify that ROM instruction set is correct for this
VGM. VGM set only has one ROM. Label...

Troubleshooting          6-10
Video Troubleshooting Table, continued
SYMPTOM CAUSE REQUIRED ACTION
•  W hite areas at screen edges
appear tinged with color
•  Dots at screen edges
appear oval or cylindricalPicture tube dynamic
convergence is out of
alignmentHave service bureau dynamically reconverge
monitor. This procedure requires removing and
repositioning yoke. Service bureau must follow
instructions from monitor manufacturer.
Improper sync signals1.  Check to see if Video Board puts out type of
sync...

Troubleshooting          6-11
Video Troubleshooting Table, continued
•  Picture is too narrowMaladjusted W IDTH
potEnter Monitor Tests Menu. W atch Crosshatch
Screen while adjusting W IDTH pot for best
picture. You’ll find this pot on Monitor Remote
Control Board, behind coin door.
•  Picture is too shortMaladjusted HEIGHT
pot or damaged
vertical circuit1.  Enter Monitor Tests Menu. W atch Crosshatch
Screen while adjusting HEIGHT pot for best
picture. You’ll find this pot on Monitor Remote
Control Board,...

Troubleshooting          6-12
Miscellaneous Problem Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Faulty fluorescent
tube1.  Remove fluorescent tube from its sockets. If you
find cracks or darkened ends, install new lamp.
Clean tube.
2.  Check continuity of both fluorescent tube
filaments.
3.  Verify that fluorescent tube operates by placing it
in working VGM.
Faulty lamp fixture 1.  Verify that lamp pins make good connection with
socket contacts.
2.  Check ballast for continuity.
•  Marquee lamp...

WARNINGS & NOTICES
WARNING
•  Use of non-Midway parts or circuit modifications may cause serious injury or equipment damage!
•  Use only Midway authorized components and parts. Failure to do so will void your warranty and may result in
incorrect or unsafe operation. Substitute parts or modifications may void the EMC directive or FCC type
acceptance.
•  Federal copyright, trademark and patent laws protect this game. Unauthorized modifications may be illegal
under Federal law. The modification ban also...