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3. Printed Circuit and Riveted Disc Units
Examples of these are the bonus, the player up, the
ball count~ the coin and the
00-90
units.
The force
exerted on the disc contacts by the rotor requires
lubrication
of the disc contacts.
Periodic maintenance
must include an inspection
for the presence of lubri-
cation and for contact condition.
Touching the contacts
with the fingers should result
in a
shiny t~ace
on
the
finger.
This, -and absence of contact pitting and dirt
indicate
a
satisfactory
operating
condition.
Contact
pitting
can be
corrected with
a
contact file and
burnishing
tool. Dirt should
be
removed with a clean,
lint free cloth.
If contact cleaning fluids are
used
to remove greasy dirt, a cloth must be used to remove
any chemical residue.
Finally, apply Bally coin machine
lubricant to a clean cloth.
Apply a thin film to the
contact surfaces.
If,
in trouble shooting, a rotor blade is suspected
as
the source of the problem, it can be checked for proper
adjustrnent.
A blade
exerting too little pressure
can
be
i
n
t
e rm
t
t
t
a n
t .
A
blade
exerting too
much
pressure
rnay slow or stop the rotor.
A check for the force
exerted by the rotors can be made as follows:
gently
warp the disc or printed circuit board away from the
rotor.
The rotor blade should follow the disc or
board for 1/32" before contact ;s broken. If it follows
further, contact force
is
too great.
If it breaks
contact too soon, contact force ;s not great enough.
Use a contact adjusting
tool to adjust the rotor blade
pressure.
4.
Credit Unit
The credit unit is used to store in memory the number of
credits or games due a player.
Credits are payed for or
won for high score, match feature or as -a special game
f eat u r e . I
III
pro per a d jus
t
men
t
0
f
the c red
i
tun
i
t
can
result in too
nia ny
or too few credits issued to the
player.
To check for proper adjustment
of the credit
unit: (See Figure 111-3)
a) Slowly hand actuate the step-up plunger.
The step-up
a r
111 III U
s
t
not eng age the n ext too tho nth era
t
c h e t
(occasional
engagement
is acceptable).
If the step-up
a rilldoe s
j
9 e n
t
1
y ben d the bas e p 1 ate tab dow n (a way
f
r
om the step-up solenoid) until hand actuation
does
not cause consistent
engagement
of the next tooth on
the ratchet.
This adjustment,
properly made, prevents
multiple crediting when only one credit is due the
player.
c