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CPU BOARD TEST
The CPU Board Test verifies the critical active circuits. Its appearance is similar to the power up test.
Highlight the CPU Board Test by using any joystick to select the option; then press any control panel
button to activate. When this test is activated, a “rug” pattern appears on the screen. The screen then
changes to show the layout of the components being tested.
During the test, integrated circuits are
indicated as good if they turn green; and faulty if they turn red. Sockets that have no circuits installed will
not change color. Inspect the CPU Board to determine which sockets will be tested.
Memory Circuits
These devices are referred to as Scratch RAM. They are found at locations
through U17 on the CPU
Board. The RAM circuits provide temporary storage of values that change as the game progresses.
Instruction Circuits
The Instruction Circuits contain the routines for the processor. They are located in sockets U35, U45,
U47, U54, U57, U63, and U64. These circuits affect the way the CPU Board operates.
Image Circuits
The graphics used in this game are installed in sockets
through U133. These circuits are tested one
at a time. Faults in this area will affect the video images that appear as the game is played.
Sound Circuits
The sounds used in this game are installed in sockets U2 through
These circuits are tested one at a
time. Faults in this area will affect the music, voices, or noises that occur as the game is played.
SOUND BOARD TEST
The Sound Test permits listening to some of the sounds that the game is capable of producing. These
tests verify that the audio components are connected and operating properly.
To enter the test, use any joystick to select the option; then press any control panel button to activate.
NOTE
The level must be turned up for the speakers to be heard. Check the volume setting before testing.
SOUND TEST SUB MENU
Each of the game sounds is stored in a discrete memory location. All of these sounds are available to test
to audio reproduction capabilities of the sound circuits. Vary the volume as you sample these sounds.
NOTE: This game does not require an external sound board. All of the components tested are located on
the CPU Board. The Audio amplifier is mounted on the
located in one corner of the board.
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