Star Tech Journal
Issue: 1982-October - Vol 4 Issue 8 - Page 24
STAR*TECH JOURNAL/OCTOBER 1982
24
NINTENDO
"DONKEY KONG JR."/ADDING A SLAM SWITCH
By Howard M. Smith, B&B Vending, Dallas, Texas
Based on our experience with front doors being kicked in on " Donkey
Kong", we are installing slam switches in every new "Donkey Kong
Jr." before we put them on location to prevent free credits.
A slam switch can be easily installed as described in an earlier
article on "Donkey Kong" slam switches (See S*TJ Vol. 4, No. 7,
Sept. ' 82). One side of the switch should be connected to ground, which
is any brown wire on the front door. The other side of the slam switch
should be connected to the positive end of C4 l , a 100 uf electrolytic
capacitor at location 1 K/ L on the CPU board. Route this wire through
the existing cable.
STERN
RESET MODIFICATION FOR "SUPER COBRA" TYPE LOGIC BOARDS
BOTTOM BOARD
Bottom Logic Board
2
1. Locate IC 4A (74LS367) on logic board.
3
~
2. Cut trace marked X located between solder pads marked W & Y.
A
3. Cut the second trace marked X that runs between pins 5 & 6 ofIC
4A & point Z which is located below IC 4B.
B
4. Add a 100-ohm (¼ watt) resistor into solder pads marked W & Y
(paralleling the trace cut).
C
5. Connect left end of resistor (point W) to pin I 4 of IC 4A with a
jumper wire.
D
r
f
Z-80
~
I
p
I f
6. With a short jumper wire connect pins 10 & 11 of IC 4A.
7. Connect another jumper wire from IC 4A pin 14 to solder pad
marked Z located below IC 4B.
Inter-Board
Edge Connector
Note: Stern recommends that only aZ-80 be used in position IA on
the bottom board. Z-80s made by Sharp are not recommended.
Go·1·1·LJEB
"HAUNTED HOUSE" LOWER LEVEL UP-KICKER FINAL SOLUTION
By Don Holtz, Banner Specialty Company, Pittsburgh, PA
New Circuit
I have read many solutions to the " Haunted House" kicker problem.
All of which have varying success.
My solution used the Gottlieb pop-bumper driver board to fire the
up-kicker coil. This modification has worked in every " Haunted
House" (about 40) with no return calls on this problem.
Old Circuit
38VDC
Solenoid Bus
5A Slo Bio
Optional
Up-Kicker Coll
38VDC
1
2
~ I Relay Contacts
K Relay
Contacts
Gold Plated
Contact Set
Optional
4
5VDC
Regulated
5
6
Gottlieb
Pop
Bumper
Driver
A8
24
NINTENDO
"DONKEY KONG JR."/ADDING A SLAM SWITCH
By Howard M. Smith, B&B Vending, Dallas, Texas
Based on our experience with front doors being kicked in on " Donkey
Kong", we are installing slam switches in every new "Donkey Kong
Jr." before we put them on location to prevent free credits.
A slam switch can be easily installed as described in an earlier
article on "Donkey Kong" slam switches (See S*TJ Vol. 4, No. 7,
Sept. ' 82). One side of the switch should be connected to ground, which
is any brown wire on the front door. The other side of the slam switch
should be connected to the positive end of C4 l , a 100 uf electrolytic
capacitor at location 1 K/ L on the CPU board. Route this wire through
the existing cable.
STERN
RESET MODIFICATION FOR "SUPER COBRA" TYPE LOGIC BOARDS
BOTTOM BOARD
Bottom Logic Board
2
1. Locate IC 4A (74LS367) on logic board.
3
~
2. Cut trace marked X located between solder pads marked W & Y.
A
3. Cut the second trace marked X that runs between pins 5 & 6 ofIC
4A & point Z which is located below IC 4B.
B
4. Add a 100-ohm (¼ watt) resistor into solder pads marked W & Y
(paralleling the trace cut).
C
5. Connect left end of resistor (point W) to pin I 4 of IC 4A with a
jumper wire.
D
r
f
Z-80
~
I
p
I f
6. With a short jumper wire connect pins 10 & 11 of IC 4A.
7. Connect another jumper wire from IC 4A pin 14 to solder pad
marked Z located below IC 4B.
Inter-Board
Edge Connector
Note: Stern recommends that only aZ-80 be used in position IA on
the bottom board. Z-80s made by Sharp are not recommended.
Go·1·1·LJEB
"HAUNTED HOUSE" LOWER LEVEL UP-KICKER FINAL SOLUTION
By Don Holtz, Banner Specialty Company, Pittsburgh, PA
New Circuit
I have read many solutions to the " Haunted House" kicker problem.
All of which have varying success.
My solution used the Gottlieb pop-bumper driver board to fire the
up-kicker coil. This modification has worked in every " Haunted
House" (about 40) with no return calls on this problem.
Old Circuit
38VDC
Solenoid Bus
5A Slo Bio
Optional
Up-Kicker Coll
38VDC
1
2
~ I Relay Contacts
K Relay
Contacts
Gold Plated
Contact Set
Optional
4
5VDC
Regulated
5
6
Gottlieb
Pop
Bumper
Driver
A8
Future scanning projects are planned by the International Arcade Museum Library (IAML).