Keeping One Running — Maintenance, Repair, Calibration and the CRT Problem

What the makers told operators to clean, test and replace, the faults their troubleshooting tables expected, where the parts come from now, and what a dead picture tube means for each family of gun

An arcade gun was designed to be serviced. Every manual in this dive has a cleaning instruction, a test screen, a calibration routine, a troubleshooting table and replacement procedures for the parts that fail. This volume collects them, so that a collector with one cabinet and no manual knows what the maker expected to go wrong, and then takes up the problem the makers did not foresee: the end of the cathode-ray tube.

Opening a gun is covered here only as far as the manuals cover it. Repairs and conversions of guns as hobby projects (new sensors in old shells, recoil added to guns that never had it) belong to Modding Classic Light Guns (planned).

6.1 The Makers’ Maintenance Schedules

Table 1 — The Makers' Maintenance Schedules

Interval	Task	Cabinets and wording
Daily	Clean the gun lens	”Clean the gun lens every day to keep it precise” (Time Crisis II);¹ “Clean the gun lenses everyday … Do not use detergents or chemicals” (Time Crisis 3);² “Clean the tip of the barrel everyday” (Time Crisis 4)³
Daily	Clean the screen-side IR filters	”Clean the following sensor section’s filters (20 locations) on the Monitor Mask everyday” (Time Crisis 4)³
Each cash collection	Camera lens, gun cables, switch test, calibration, IR sensors	Aliens Armageddon’s “five-step procedure every time you empty the cash box”⁴
Weekly	Recalibrate	Big Buck Hunter Pro recommends “a recalibration after every week of operation”⁵
After any move or gun repair	Recalibrate	”Recalibrate the guns any time the game is moved or the guns are repaired, replaced or swapped” (Aliens Armageddon)⁴
After a board, ROM, RAM or battery change	Recalibrate	Terminator 2⁶
Six-monthly	Grease the pedal plunger	Time Crisis 4 (the pedal, not the gun)³

Two cleaning rules recur. Use a dry soft cloth and nothing else on a lens (“Do not use detergents or chemicals”, Time Crisis 3 and 4²³), and never push cleaner into the barrel: Maximum Force and CarnEvil both say to apply it “to a clean cloth or cotton swab” and “Do not apply cleaner directly into the gun barrel!”⁷⁸ Atari Games’ summary applies to every optical and infrared gun: “No amount of calibration and testing can fix a dirty optical system, loose components, defective cables, etc.”⁷

6.2 Calibration, Family by Family

Table 2 — Calibration, Family by Family

Family	Procedure in the manuals	Stored in
Optical	Shoot a target or targets at “normal playing distance” with the gun’s sights; Area 51 holds the trigger “until the screen stops flashing”;⁹ Maximum Force and CarnEvil say to stand “directly behind the gun holder and extend the cable to its full length” and to fire “one at a time”;⁷⁸ Virtua Cop offers default and manual adjustment per player¹⁰	Game board
Positional	Three targets, top left, centre, bottom right, with “the sight on the gun. DO NOT use the red circles” (Operation Thunderbolt);¹¹ “INITIATE EEPROMS” (Space Gun);¹² three targets to CMOS RAM (Terminator 2)⁶	EEPROM or battery-backed RAM
Infrared	Gun Initialize: crosshair check over the whole screen, then shoot targets “in the order” shown, holding the gun “straight. Do not tilt” (Time Crisis 4);³ IR Gun Calibration (Terminator Salvation)¹³	Game board

Two cautions from the manuals deserve to be read before calibrating anything. First, a positional gun calibrated with a worn pot or a faulty gun stores bad data, and on Beast Busters bad data froze the game on power-up; SNK had boards returned under warranty that “were simply in need of proper Gun Aim Calibration”.¹⁴ Second, calibrate in the lighting the cabinet will be played in: “Turn room lights down to reduce glare” (CarnEvil);⁸ “Reduce light levels and recalibrate guns” (Maximum Force).⁷

6.3 Faults the Manuals Expected

Table 3 — Faults the Manuals Expected

Symptom	Likely cause, per the manuals	Fix	Family
Shots land wrongly	Dirty lens; lens reversed; fluorescent or neon reflections; sunlight	Clean; refit with the “spherical surface … toward the muzzle”; move the cabinet or the light	Optical¹⁵¹⁶
An area of the screen cannot be hit	Monitor purity	Degauss the tube	Optical¹⁶
Screen flashes, no hit	Dirty lens, dim monitor	Clean; adjust brightness; raise flash brightness	Optical¹⁶⁸
”OUT OF SCREEN” while on screen	Light on the LEDs; gun nearer than 60 cm; too steep an angle	Reduce lighting; stand back	Infrared³
One region never registers	A dirty or dead IR sensor or LED board (“If any squares remain red”)	Clean; replace the board	Infrared¹³¹⁷
Erratic on a twin installation	Cross-talk between identical cabinets	Remove the frequency jumper on alternate machines	Infrared¹⁸³
Aim drifts or jumps	Worn pot or gears; gear “idly racing”	Test for “a steady linear increase … with no jumps”; reset the gear mesh; replace; recalibrate	Positional⁴¹⁹
”CMOS RAM Error” at power-up	Flat battery; lost calibration	Replace the battery; recalibrate	Positional⁶
Trigger dead	Microswitch	Replace (Namco: SS-01GL2T; Sega: SS-5GL2)	All¹⁵¹⁸
No recoil	Fuse or circuit protector; worn solenoid; disconnected connector; motor brushes	Check the protection first, then the actuator	All (Volume 5)

Sega’s Virtua Cop manual adds an instruction that applies to every gun with soldered switches: “Take out the microswitch by removing the soldering from it … Solder the new microswitch and assemble the controller”, and “be sure to perform sighting check in the test mode when the controller parts are replaced.”²⁰

6.4 Parts Today

The manuals’ part numbers are the starting point, because the makers reused parts across games (Volume 1): a Namco ST-0860A2 solenoid or 296-467 sensor board fits more than one Time Crisis; a Sega JPT-2030 sensor unit or 838-13145-02 LED board serves House of the Dead III, Ghost Squad and House of the Dead 4; an Atari Games A051987-01 gun board is in both Area 51 and Maximum Force.

Beyond salvage, the evidence found for this dive is thin. Collectors on the Arcade-Projects forum rank the options for a Time Crisis-family cabinet as “namco best, happ with recoil works, happ without recoil will still function”, and add that “sourcing new Namco gun shells is pretty difficult”.²¹ Happ, now Suzo-Happ, listed replacement optical guns and a replacement solenoid for Namco recoil guns; its product pages refused connections on 2026-10-19 and could not be read, so no part numbers or availability are given here.

Raw Thrills’ manuals carry Happ-style numbers throughout (96-, 95-, 43- prefixes) and name a distributor on every page;⁴ parts for the 2010s cabinets are still sold through the distributor network, at prices this dive did not collect.

6.5 The CRT Problem

Figure 1 — What each gun family needs when the original display dies. Optical guns depend on the CRT's beam timing, so the choice is a working tube of the original type or a different gun system. Positional g… — Figure 1 — What each gun family needs when the original display dies. Optical guns depend on the CRT's beam timing, so the choice is a working tube of the original type or a different gun system. Positional guns do not see the screen and only need recalibrating. Infrared guns see emitters in the mask, so any display works if the emitters stay where they were relative to the picture. Own work.

Why a flat panel defeats every timing gun is told once, in History of Light Guns Volume 6: no scanning beam, a frame buffer that delays the picture, and an image held rather than drawn. For an arcade owner the consequence depends entirely on the family.

Optical (family A). The gun measures the moment a scanning beam passes its aim point, against the video timing the board produces. The manuals were written for 15 kHz direct-view tubes (Time Crisis 3’s is “27-inch color monitor CGA”²) or, later, CRT projection. A scan converter or a modern projector that stores the frame before showing it breaks the measurement; a Time Crisis owner on the Arcade-Projects forum put it as “My projector is a DLP so won’t play the gun anyway as it’s buffering the video”, and collectors there are blunt that the Time Crisis 3 guns “will not function without an RGB CRT based display”.²¹²² There are two honest options:

Keep a CRT of the original type working. That means a 15 kHz arcade monitor or chassis of matching size, kept bright (CarnEvil’s flash setting is the reminder that a tired tube is a tired gun⁸). The partial rescues and their limits are in History of Light Guns Volume 6.
Replace the gun system, not just the screen. A modern infrared or border-tracking gun cannot speak to the original game board’s gun inputs as the manuals describe them, so this route normally means running the game where the new gun is supported. The guns are surveyed in Open-Source Firmware §1.10 (Sinden, AimTrak, GUN4IR, RS3 Reaper and the open firmware), and running arcade software on other hardware belongs to Arcade Hardware (planned). The cabinet, shell, holster, pedal and recoil can be kept.

The makers themselves planned for the end of a cabinet’s game: the UK Lethal Enforcers manual offers a conversion kit (33059) that turns the cabinet into “a standard Jamma cabinet when the game has reached the end of its useful life”.¹⁶

Positional (family B). Nothing in the gun cares what the display is. Any monitor that accepts the board’s video at the original size and position will do, followed by the three-point calibration. Midway’s own Revolution X went into Terminator 2 cabinets with a “T2 Retrofit” switch setting,²³ and positional cabinets were still being built for LCDs in 2014 (Aliens Armageddon fixed-gun, Deadstorm Pirates SE). Volume 3 has the parts.

Infrared (families C and D). The gun sees the emitters, not the picture, so the display can be changed. What must be kept is the geometry the calibration assumes: the mask and its LED boards (or Raw Thrills’ IR units on the monitor assembly) in the same place relative to the picture, the 60 cm minimum distance and the angle limits that Time Crisis 4 states,³ the lighting rules, and the frequency jumper on alternate cabinets in a row.¹⁸

6.6 Safety

The manuals’ own warnings, in the order a home owner is likely to meet them:

CRT high voltage. Every manual warns that the monitor holds high voltage after power-off; the Ghost Squad manual adds that repair “should be performed only be those technical personnel who have knowledge of electricity”.¹⁷ Point Blank lists an interlock switch among its cabinet parts,²⁴ and Taito’s Operation Wolf interlock “automatically disconnect[s] power to the game when the drawer assembly is pulled out”.²⁵
Lenses. “Do not remove the lenses from the Gun Assys when discarding the machine. Detached lenses can converge sunlight, causing a fire, blindness or burns.”²
Hot solenoids. Ghost Squad’s burn warning is quoted in Solenoid Recoil Volume 1.
Weight. The Terminator Salvation monitor assembly alone weighs 438 lb (199 kg);¹³ Time Crisis 3 SD’s front assembly 530 lb and the whole machine about 750 lb.² The manuals specify two or more people and caster and leveller procedures.
Earth. Aliens Armageddon’s “Important: Be sure to reconnect this wire!” on the coil plate’s ground lead,⁴ and Operation Wolf’s earth pin on the gun connector,²⁶ are the reminder that a metal gun on a cable is part of the cabinet’s safety earth.

6.7 What could not be verified

Current availability and prices of any replacement gun or part. Suzo-Happ’s pages refused connections; no other seller page was read.
Whether any product interfaces a modern IR gun to an original optical-gun game board. None was found in a primary source; the route described above is the one the sources support.
Display compatibility of the infrared cabinets with replacement LCDs. Inferred from the system design (emitters in the mask); no maker’s statement was found.

Sources

Namco, Time Crisis II Operation Manual, cleaning instructions. Internet Archive item arcademanual_Time_Crisis_2; Library copy. Read 2026-10-19. ↩
Namco America, Time Crisis 3 SD Operation Manual (2003), specifications, §5, §7-5-1, §8-2-5, disposal cautions. Internet Archive item time-crisis-3-sd. Read 2026-10-19. ↩ ↩² ↩³ ↩⁴ ↩⁵
Namco Bandai Games, Time Crisis 4 DX Operators Manual, Issue 2, Part No. 90500167, Gun Initialize, §7-1, §7-2. Internet Archive item time_crisis_4_dx_manual_issue2_ptm; Library copy. Read 2026-10-19. ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸
Play Mechanix / Raw Thrills, Aliens Armageddon Setup and Operation Service Manual, © 2014, maintenance procedure, Gun Pot and Gear Service, Gun Coil Assembly Service, parts. Internet Archive item manualzilla-id-6032150. Read 2026-10-19. ↩ ↩² ↩³ ↩⁴ ↩⁵
Raw Thrills, Big Buck Hunter Pro 27” Dedicated Video Game Operator’s Manual, © 2006, Gun Calibration Menu. Internet Archive item big_buck_hunter. Read 2026-10-19. ↩
Midway Manufacturing, Terminator 2: Judgment Day Operations Manual, 16-40009-101, December 1991, set-up and Calibrate Guns. Internet Archive item arcademanual_T2_Judgement_Day_16400091011_Dec_1991. Read 2026-10-19. ↩ ↩² ↩³
Atari Games, Maximum Force 25” Dedicated Manual, April 1997, maintenance and gun tests. Internet Archive item arcademanual_Maximum_Force. Read 2026-10-19. ↩ ↩² ↩³ ↩⁴
Midway Games, CarnEvil 2-Player Dedicated 25” Operations Manual, 16-40069-101, November 1998, maintenance, gun calibration, flash brightness. Internet Archive item arcademanual_CarnEvil_2Player_Dedicated_25in_1640069101_Nov_1998. Read 2026-10-19. ↩ ↩² ↩³ ↩⁴ ↩⁵
Atari Games, Area 51 Operator’s Manual, © 1995, 1996, Chapter 2. Internet Archive item arcademanual_Area51.man. Read 2026-10-19. ↩
Sega, Virtua Cop 2 Owner’s Manual (UK upright), © Sega 1995, Gun Setting. Internet Archive item arcademanual_Virtua_Cop_2_Owners_Manual. Read 2026-10-19. ↩
Taito America Corporation, Operation Thunderbolt Operating Manual, Gun Sight Settings. Internet Archive item arcademanual_Operation20Thunderbolt. Read 2026-10-19. ↩
Taito / Electrocoin Automatics, Space Gun Service Manual, gun set-up. Internet Archive item arcademanual_Space_Gun. Read 2026-10-19. ↩
Play Mechanix / Raw Thrills, Terminator Salvation 42” Deluxe Setup and Operations Manual, revision 7.30.12, © 2010. Internet Archive item manualzilla-id-6035891. Read 2026-10-19. ↩ ↩² ↩³
SNK, Beast Busters manual and service bulletin. Internet Archive item arcademanual_BeastBusters.man. Read 2026-10-19. ↩
Namco, Time Crisis SD Operation Manual, §7-2-5, §7-3-4, §9-5. Internet Archive item arcademanual_Time_Crisis_SD_Manual; Library copy. Read 2026-10-19. ↩ ↩²
Konami, Lethal Enforcers Operators and Service Manual (UK distributor edition), troubleshooting and special features. Internet Archive item arcademanual_lethal-enforcers-manual. Read 2026-10-19. ↩ ↩² ↩³ ↩⁴
Sega Amusements USA, Ghost Squad Deluxe Owner’s Manual, Manual No. 4201-6831-01, November 2004. Internet Archive item sega-ghost-squad; Library copy. Read 2026-10-19. ↩ ↩²
Sega Amusements Europe, The House of the Dead III DX Service Manual, 420-6742-01UK, © Sega 2002. Internet Archive item manualzz-id-978359. Read 2026-10-19. ↩ ↩² ↩³
Sega, Line of Fire Upright Temporary Manual, © Sega 1989, §16. Internet Archive item arcademanual_Line_of_Fire_Temporary_Manual. Read 2026-10-19. ↩
Sega, Virtua Cop Owner’s Manual, Manual No. 4201-6149-05, © Sega 1994, §9. Internet Archive item virtua-cop-manual. Read 2026-10-19. ↩
“Setup Time Crisis 3”, Arcade-Projects forum, posts by bagheera369, Hydreigon and bobbydilley, 26–31 October 2019, https://www.arcade-projects.com/threads/setup-time-crisis-3.10742/, read 2026-10-19. ↩ ↩²
“Time Crisis 3 Problems”, Arcade-Projects forum, post by twistedsymphony, 25 May 2017, https://www.arcade-projects.com/threads/time-crisis-3-problems.3447/, read 2026-10-19. ↩
MAME, src/mame/williams/midxunit.cpp, revx DIP switches, mamedev/mame master, read 2026-10-19. ↩
Namco / Brent Leisure, Point Blank Operators Manual, Part No. 90500078, © 1994. Internet Archive item pointblank; Library copy. Read 2026-10-19. ↩
Taito America Corporation, Operation Wolf cabinet service sheet, Interlock Switch. Internet Archive item arcademanual_Operation_Wolf_Cabinet_Service_Manual. Read 2026-10-19. ↩
Taito America Corporation, Operation Wolf Operating Manual, Gun Assy Wiring Diagram. Internet Archive item operation_wolf_operating_manual_ptm. Read 2026-10-19. ↩