Major Havoc ST-252 Second Printing Conversion Arcade Back Door Sheet PDF Download
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Major Havoc ST-252 Second Printing Conversion Back Door Sheet PDF Download
Download the Atari Major Havoc ST-252 second-printing conversion back door sheet as a printable digital PDF. This original operator reference sheet covers Major Havoc conversion configurations for compatible Space Duel, Black Widow, and Gravitar arcade hardware.
The sheet provides self-test information, processor and ROM fault references, operator-display details, play settings, pricing options, and other configuration information. This is a digital download. No printed sheet, programmed component, or other physical product is shipped.
Document Details
- Game: Major Havoc
- Manufacturer: Atari
- Document number: ST-252
- Printing: 2nd printing
- Application: Major Havoc conversion configurations
- Original conversion hardware: Space Duel, Black Widow, and Gravitar
- File format: One-page digital PDF
Conversion Hardware Application
This ST-252 sheet was produced for Major Havoc conversion configurations. It should not be assumed to apply to every dedicated Major Havoc cabinet or hardware revision. Confirm the original cabinet, conversion hardware, PCB configuration, document number, and printing before downloading.
Self-Test and Diagnostic Displays
The sheet explains how to activate the cabinet self-test switch and interpret the operator-information displays. It identifies Gamma and Alpha processor fault indicators, RAM and ROM error locations, the Gamma microprocessor command number, coin counters, roller-control position, and other diagnostic information.
- Gamma processor RAM and ROM fault identifiers
- Alpha processor RAM fault locations
- ROM checksum and component-location references
- Operator-display labels and control functions
- High-score reset and sound-test procedures
Play Options
The ST-252 sheet includes switch settings for starting lives, game difficulty, bonus-life intervals, attraction-mode sound, and adaptive difficulty. It also identifies the applicable switch bank and its PCB location.
- Starting lives for Free Play, one-coin, and two-coin configurations
- Hard, medium, easy, and demonstration difficulty settings
- Bonus-life settings at 50,000, 100,000, or 200,000 points
- Attraction-mode sound selection
- Adaptive-difficulty selection
Price Options and Two-Coin Minimum
Pricing information includes Free Play, one-coin and two-coin game settings, left and right coin-mechanism multipliers, and bonus-coin adder schedules.
Hardware modification warning: The original sheet states that enabling the two-coin-minimum option requires shorting pin 6 at location 13N to ground. Do not attempt this modification without confirming the correct PCB and using appropriate electronics knowledge and soldering procedures.
Confirm the Correct Hardware
Arcade conversion configurations can differ by original cabinet, PCB revision, conversion kit, wiring, and control arrangement. Review the document number and product image carefully to confirm that ST-252, 2nd printing, matches the Major Havoc conversion hardware you are servicing.
Electrical Safety
Safety warning: Arcade cabinets may contain hazardous voltages, and CRT monitors can retain a dangerous electrical charge after power is disconnected. Use a qualified arcade technician if you are not trained to service arcade electronics safely.
Original Arcade Reference Document
This is an original arcade operator reference sheet and is not a complete service manual or HighScoreSaves kit installation guide. For HighScoreSaves product instructions, visit the HighScoreSaves Installation Guides section.
How Digital Delivery Works
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Browse additional printable operator-reference documents in the Arcade Back Door Sheets category.
Digital product: No printed back door sheet, programmed chip, circuit board, disc, USB drive, or other physical item will be shipped.
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