Pincoder Diagnostics Inc.  Version 2022.11.24.2050_beta

ROM NAME
==============================================================================================

13-hyperball (Williams sys7)



PINCODER ADAPTER SETTINGS
==============================================================================================

JP1   JP2   DIP SWITCHES

2-3   2-3   -1---11-




PURPOSE
==============================================================================================

This test ROM is intended for Hyperball only and allows you to test the ALPHA-NUMERIC display
located underneath the playfield. To Troubleshoot problems you will need the Hyperball
schematics.

    NOTE: This test requires working RAM, IRQ, and BLANKING signals. Make sure your boards
    pass all of the earlier tests before running this test.


!!!
!!!   WARNING: IC14, IC21, IC22 and IC25 use HIGH VOLTAGE. Please use extreme caution when
!!!   working with this test!
!!!




HOW THE ALPHANUMERIC DISPLAY WORKS
==============================================================================================

Unlike the NUMERIC-ONLY displays located in the head of game, each segment in every digit is
individually accessible. This means the hardware can light a single segment in a digit without
having to light any other segments.

Refer to your schematic on page 31 (Display Wiring). For this display, the leftmost digit is
DIGIT-12 and the rightmost digit is DIGIT-1. Selecting which DIGIT to drive is done using 12
of the 16 DISPLAY STROBE signals that are also used to drive the NUMERIC-ONLY displays.

Interestingly enough, Williams used DISPLAY STROBES:

    * 16 through 10 to also drive ALPHA-NUMERIC DIGITS 1 through 7 respectively, and

    * 8 through 4 to also drive ALPHA-NUMERIC DIGITS 8 through 12 respectively

DISPLAY STROBES 1,2,3, and 9 are not used to drive the ALPHA-NUMERIC display.



PROCEDURE
==============================================================================================

There are two simple modes to this test ROM. The first mode sequences each segment through all
digits simultaneously. When all segments have been shown the second mode begins. In the second
mode, a series of characters are scrolled across the display. When this mode is complete, the
whole test starts again.

Turn on the game and and examine the segments on the display. Look for irregularities in each
digit of the display. You may find common segments that stay lit or do not light at all. The
same could be true for entire digits.

You can push the DIAG switch on the MPU board to freeze the test. Push again to advance the
test a single step. To go back to automatic scrolling, step through to the end of the current
mode, or turn the power off and on again.



EXPECTED RESULTS
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Each segment in the display should show to be individually accessible.



IF THERE IS NO ACTIVITY AT ALL
==============================================================================================

Ensure there is a BLANKING signal at pin 1 of IC13.

Ensure -100V is at 2J9 pin 1.

Ensure +90V is at 2J9 pin 2.

Ensure Anode (+90v) and Cathode (-100V) signals are getting to the corresponding pins of the
ALPHA-NUMERIC display (14J1, 14J2, 14J3, 14J4)



TROUBLESHOOTING MISSING DIGITS
==============================================================================================

Use this section if you have stuck (always on) or dead (always off) DIGITS.

Ensure +90V is getting to pin 10 of both IC25 and IC22.

Refer to page 23 (Control Board Logic 2 of 2). You should see incoming strobe signals on
2J7. If so follow the signals to IC23 and IC24. You should see inverted toggles on the output
pins. Replace chips if required.

If you do not see incoming strobe signals on 2J7, re-run the 05-displays test to verify
whether the NUMERIC-ONLY displays are working properly.

For narrowing the search on missing DIGITS here, look closely at the following ICs:

    * DIGITS 1-7: IC24 + IC25

    * DIGITS 8-10: IC23 + IC22

    * DIGITS 11,12: IC24 + IC22



TROUBLESHOOTING MISSING SEGMENTS
==============================================================================================

Use this section if you have stuck (always on) or dead (always off) SEGMENTS for *ALL*
DIGITS. If the SEGMENT problem does not persist across all DIGITS replace the ALPHANUMERIC
display.

Ensure -100V is getting to pin 10 of both IC14 and IC21.

Refer to schematic on page 23 (Control Board Logic 2 of 2). Check all of the PA0-7 and PB0-7
pins of IC12 for toggling output. If one or more does not toggle replace IC12.

You should also see toggling signals on the input pins of IC13, IC19, and IC20. Matching
toggles should also be seen on the output pins. Replace chips if required.

Check pins 11-18 of both IC14 and IC21. If a chip does not produce toggles on one or more
outputs, replace that chip.

Refer to SEGMENT DIAGRAM of Page 24 (Alphanumeric Display Board Assembly Drawing). Each
segment for a given digit has been assigned a letter.

SEGMENT letters relate to IC chips as follows:

    * SEGMENTS a-f, h, j: IC13, IC19, IC14

    * All other SEGMENTS including DECIMAL and COMMA: IC20, IC19, IC21

PS: The schematic I have for page 23 (Control Board Logic 2 of 2) is a bit indistinguishable
for the two columns of "ALL 145038" ICs. In the second column, however, the last two IC's in
the column are both referring to IC19.

Pincoder Diagnostics Inc. Version 2022.11.24.2050_beta
