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TEST/DIAGNOSTIC PROCEDURES
(Continued)
SYSTEM-11B SOUND CIRCUITRY TESTS (Continued)
If the previous checks did not isolate the problem, turn the Volume Control for maximum output.
Momentarily touch
a
powered-up AC soldering pencil on the center tap of the Volume Control.
©&.tlP'U'D@fM
DO NOT use a soldering iron over 40 watts. Note also that cordless soldering
irons will NOT work for this test.
Hearing a low hum or
a
'click' indicates that the power amplifier (U~, TDA2002), the Volume Con-
trol, and the speaker are operating satisfactorily, as is the sound circuit cabling. Not hearing a
sound requires repeating the test with the Volume Control turned part way down, to determine
whether the Volume Control is faulty. Also, check the cable connectors for proper mating, and
that no broken wires affect this circuit.
PROBLEM ANAL
VSIS
MESSAGES.
The SYSTEM 11B game program has a great capability to aid the operato r and service
personnel:
At Game Turn-on (and also at the beginning of the ITesUDiagnostic Procedures)
after the game has been operating for an extended period, the player score displays now
may
signal with a message, "Press ADVANCE for Report", that the game program has detected a
possible problem with the game.
To obtain details
01
the problem, open the coin door and press the AUTO-UP/MANUAL-DOWN
switch to MANUAL-DOWN.
Press the ADVANCE button to begin displaying the message(s).
The following messages apply to your
®~® ©~im
game.
Adjust
Switch
##.
This message incicates that at least one switch was stuck 'On' at game
tum-on or has NOT been actuated during ball play (for 90 balls or
",30
games) by displaying the
message "Adjust Switch ##", listing each problem switch by number.
(The game program
compensates the game play requirements affected by each disabled switch to allow 'nearly
normal' play. This helps keep
IID~@
~im
earning good profits!)
To verify the problem, refer to the Test/ Diagnostic Procedures text describing Switch Testing,
and check each reported switch using applicable Switch Levels and Switch Edges tests. Always
check switch operation using a ball to simulate game conditions. (Switch problems may often be
resolved by adjusting the wire switch actuators, fixing electric switch problems, securing loose
connectors, etc. Mechanisms using 'opto switches' (drop targets, etc.) need to be checked for
proper power connections (12V dc and ground).
Pinball
Missing.
oo~rw
rg~'ii'$ normally uses one ball. This message announces that the ball
is missing or stuck somewhere.
When the ball is located, return it to the game via the Outhole.
Other possibilities for this problem could be malfunctions of the Trash switch (# ), the Outhole
switch (#10), Seafood Spin switch (#44), or the Ball Shooter switch (#14).