Atari 2600

2600A Audio Test Procedure
Reinitialize switches.
Slide the right
difficulty switch to
the right.
Is there a
clear tone?
I
Use scope or
frequency
counter
to measure frequency
at emitter of 4201.
I
Tone audio to 4.5 MHz
by adjusting L2O I.
4
I
I
Ad just to 2.06 MHz.
Look for stable
frequency .
I
I Can unit be . - /-
adjusted g& is
sound clear?
Pg. 6-24
2600/2600A Domestic VCS