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486
11.
To exit the Auto Cycle mode and advance to Switch Test
03,
set the toggle switch to AUTO-UP and depress the
ADVANCE pushbutton during the Solenoid Test.
Operation is now as previously described for Test 03.
12. To terminate the Auto-Cycle mode and goto game over,
tum the game OFF and back ON.
SECTION 6
MAINTENANCE
This section provides procedures for board replacement.
CPU and Sound Board self-tests, and troubleshooting
procedures. For any problems first perform the CPU Board
Self-Tests. For sound problems also perform the Sound
Board Self-Test. After performing the self-test(s). refer to the
traubleshooting charts that follow.
BOARD REPLACEMENT
CPU Board
To remove the CPU Board, the Driver Board must first be
unmounted. If the replacement board is not equipped with
FLASH PROMs and yellow-labeled ROMs, the PROMs
and ROMs must be removed from the old board. In any
event, the replacement board MUST BE EQUIPPED
WITH THREE PROM SOCKETS. To replace the CPU
Board, proceed as follows:
1. Tum the game OFF.
2.
Remove the six screws and star washers that secure the
driver board to its mounting bracket.
3. Carefully unplug the Driver Board from the CPU
Board.
4. Disconnect the seven plugs from the CPU Board.
5. Remove the two screws and star washers that secure the
top of the CPU Board to its mounting bracket in the
backbox, (The bottom of the board is secured by a
groove in the bracket.)
6.
Lift the CPU Board up and remove it from the backbox.
'7.
Inspect the PROMs and ROMs.
a. If the replacement board does not have FLASH
PROMs, remove the PROMs and insert the PROMs
from the old CPU Board into the sockets on the
replacement board. Make sure that the notches on
the PROM #1 and #2 chips are facing down and the
PROM #3 chip notch is facing left.
NOTE
Flash PROMs provided with prototype games can
not be intermixed with those provided
10
production
games. The revision level (indicated by the last digit
on the PROM label) must be "1" for aU PROMs or
"2" for all PROMs.
b. If the replacement board does not have yellow-
labeled ROMs, remove the ROMs and insert the
yellow-labeled ROMs from the old CPU Board into
the sockets on the replacement board. Make sure that
the notches on the chips are facing down and that
ROM
III
is in the third socket tram the left.
8. Set the replacement CPU Board into the groove in the
bracket and secure it at the top with the two screws and
star washers removed in step 5.
20
9. Reconnect the cables disconnected in step 4 using the
keys and cut-off pins as a guide. Make sure that the pins
are aligned, the connectors are firmly seated, and that no
pin terminations have been pushed out of the plugs.
to.
Carefully plug the Driver Board onto the CPU Board
and mount the Driver Board to the bracket using the six
screws and star washers removed in step 2.
11.
Turn the game ON and perform the CPU Board Self-
Test procedures.
Driver Board
Proceed as follows:
1.
Tum the game OFF.
2.
Disconnect the
12
plugs from the board.
3.
Remove the six screws and star washers that secure the
board to its mounting bracket.
4.
Carefully unplug the Driver Board from the CPU Board
and remove the Driver Board.
5. Align the replacement board over the pins on the CPU
Board and carefully plug it onto the CPU Board.
6. Secure the board to the mounting bracket using the six
screws and star washers removed in step
3.
7.
Reconnect the cables disconnected in step
2
using the
keys and cut-off pins as a guide. Make sure that the pins
are aligned, the connectors are firmly seated, and that no
pin terminations have been pushed out of the plugs.
8. Turn the game ON and perform Lamp, Solenoid, and
Switch tests in accordance with procedures provided in
Section 5.
Power Supply Board
Proceed as follows:
1.
Tum the game OFF.
2.
Unplug the six cables from the board.
3. Remove the six screws and star washers that secure the
board to its mounting bracket.
4. Position the replacement
board on the mounting
bracket and secure with the six screws and star washers
removed in step
2.
5.
Reconnect the six cables unplugged in step
2.
6. Turn the game ON and check power supply voltage
using Table
4
as a guide.
Master Display Board
Proceed as follows:
1. Tum the game OFF.
2. Unplug the seven cables from the board.
3. Remove the four nuts and lockwashers that secure the
board to the nylon spacers on the insert door and
remove the board.
4. Position the replacement board on the spacers and
secure it using the four nuts and lockwashers removed in
step 3.
S.
Reconnect the seven cables unplugged in step 2.
6. Turn th~ power ON and perform the display digits test in
accordance with procedures provided in Section 5.