8 _ _ _ _ _ _ _ _ _ _ S~~TECH
Gremlin/Sega
"Carnival"
AND
"Digger"
Credit Modification
It has been found that, in some areas
of the country, these games will give a
free credit if a static charge is applied
to them. To alleviate this problem, the
following modification is
recommended:
1. Turn off game power.
2. Remove the Photo-Coin Assembly
Board located inside the door.
3. Locate the IC U 1, A 555 IC, on
the Photo-Coin Board.
4. Turn the Board over and cut the
etch between pins 2 and 6 of U1.
5. Carefully solder a 1 00K resistor
from pin 8 of U1 to pin 2 of U1.
6. Solder a 12" length of wire from
pin 2 of U 1. Attach the other end
of this wire to the top of the
Photo-Coin Board. This wire
should form a loop.
7. Solder a 22 OHM resistor
between pins 6 and 7 of U1.
8. Re-install the Photo-Coin Board in
its edge connector.
Now the game will no longer give a
free credit when a static charge is
applied.
Centuri
"Eagle"
Monitor Notes
Monitor: Electrohome G0-2
Symptom: Loss of vertical deflection.
Cure:
Close visual inspection of
monitor chassis will
disclose problem.
Generally located on
geometry PCB coils
mounted on this board
break, or poor solder
connections found on
bottom of geometry PCB.
Symptom: Loss of video, focus or
blows fuses.
Cure:
Dynamic convergence
PCB cracked or
components broken or
loose. (Caution should be
taken not to disturb any
adjustments on this PCB.)