S*TJ MARCH 1982 7
GO'l'l'I ,I EB
SWITCH ARCING MODIFICATION
Games Affected:
All pinball (flipper games) using +38 VDC for kicking rubbers and kicking targets.
"Haunted House" (669 Samples Only) - Kicking targets, kicking rubber on main
playfield and the K switch contacts on lower playfield. "Haunted House" production
games have capacitors already attached (Part no. X0-300, 3.3 UFD, IOOV non-
polarized) on kicking targets, kicking rubber, and K-switch contacts.
"Black Hole" (668)- Upper playfield kicking rubbers - See page 45 in game manual.
"Volcano" (667) - Kicking rubbers, kicking target - See page 35 in game manual.
"Pink Panther" (664) - Kicking rubbers - See page 22 in game manual.
Subject:
Eliminate switch arcing and burning which may be potentially hazardous when using
+38 VDC.
Recommended Action:
Solder a capacitor in the range of 2.2 UF to 10 UF, 100 VDC ( or higher) across the
kicking rubber or kicking target coils using +38 VDC. Electrolytic capacitors are
normally polarized and must be connected properly. Capacitors identify which is the
positive ( +) lead or which is the negative (-) lead. The positive lead is soldered to the
coil terminal where the diode cathode connects and the positive voltage is applied. See
Figure 1.
DIODE
1N4004
1AMP, 400PIV
MINIMUM
RATING
FIGURE 1
GROUND
,
+ 38V DC
,
'''7 ~;;__ ANODE
CATHODE
Attention:
1. On "Haunted House" samples, connect the capacitor across the K-switch contacts
and not across the lower playfield up-kicker coil.
K
5AMP
+38VDC~
+
SLO-BLO
~
CAPACITOR
J
UP KICKER
COIL
-::
(LOWER PLAYFIELD)
2. It is recommended to add a 5 amp slo blo fuse between the K contacts and the lower
level up-kick~r coil to avoid coil burn-out if the K contacts remain closed due to
improper switch contact adjustment. Fuses and #350-308 fuse holders should be
available at Gottlieb distributors. Production games with serial numbers higher than
#05950 already have the fuse and fuse holder.
Please check your game( s) serial number( s) prior to acquiring any of the above
mentioned parts.
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