Driving Controller Check; Driving Controller Schematic - Atari 2600 Field Service Manual

TRUTH TABLE
I ,
i
A
Equipment Needed
0
T.V. s e t
F i g u r e 7-6. Driving Controller S c h e m a t i c
DRIVING CONTROLLER CHECK
Known good VCS unit
Indy 500 c a r t r i d g e
P r o c e d u r e
1. Plug in Indy 500 c a r t r i d g e and plug in driving controller t o b e t e s t e d in l e f t
hand port.
2. P r e s s game r e s e t switch.
3. Turn controller knob and insure t h a t c a r t u r n s in t h e s a m e direction as t h e
knob. Insure t h a t c a r doesn't skip position o r wobble between positions*
There should b e 16 d i f f e r e n t positions for t h e c a r .
4. Press down on t h e knob and lightly wiggle i t back and forth. T h e c a r should
not move a t all.
5. Press down on t h e r e d button. The
car
should m o v e forward.
6 . If t h e c o n t r o l l e r fails any of t h e a b o v e t e s t s i t is d e f e c t i v e .
2600/2600A Domestic VCS