Atari CX 5200 Field Service Manual page 172

MOOEI.,
cxnoo
SUBJECT:
Defective Rockwell 6502 MPU on CX5200 PC Board.
DESCRIPTION:
RockweH MPUs with date code of 8250 and later (stamped with the letters
RC) have a timing defect.
A factory modification adds an R-C network on the component side of the
CX5200 PC Board at IC U 14A (pin 1) and U6A (pin 4) (see Figures
Note: You
manufacturer ' s
Consumer Product Service
Manager 01 Tehnical Support
TECH TIP
do not need to
remove
a Rockwell
MPU MPU with
or
•
,,..
Figure 1. CX5200 Schematic (R-C Network)
CX5200 PC Board
Figure 2. Factorv Modification
OA"fE,
network
this to
use:
a diffe ren t date
code.
VCS
number
1/20183.
1
and 2).
other
any