Atari CX 5200 Field Service Manual page 111

SECTION 5A
2-PORT
5200
SYMPTOM
CHECKLIST
The
Symptom
Checklist
is
designed
to assist
the
experienced technician to arrive
at
a
rapid diagnosis
for
2-Port 5200 problems.
The
checklist
is
not
intended
to
replace the
Diagnostic
Flowchart
as the
primary troubleshooting guide but
to
supplement
the
flowchart.
To
save you time, Diagnostic Flowchart entry
points are indicated
on
the
checklist
where
applicable.
SYMPTOM
POSSIBLE
CAUSES
FLOWCHART
ENTRY
POINT
SOLID
COLORED
SCREEN
Solid
Colored Screen
A7,A2,A3,A5,A7,Y1,Q1,
Q2,
VR1
Pg.
4A-2
Vertically
Lined Screen
J1,A2,A3,A5,A7
or
open
or
shorted data
or
address
line
Pg.
4A-2
VIDEO FAILURES
Snowy
Screen
VR2,A26,
RF
Module,
Jack, Cable
Pg.
4A-10
Warped
Picture
(Sync
Loss)
RF
Module, A1,A5,
A3
Pg.
4A-13
COLOR
FAILURES
No
Color
A5,Q3,C9,C11,Y1
Pg.
4
A-
14
Weak
Color
Q3,C11 ,C9,R29,R32
Pg.
4A-14
AUDIO FAILURES
Audio Failures
A7,Q4,C14,C13,L1
Pg.
4A-17
Only
a
Few
Tones
A7
Pg.
4A-17
Fail
CX5200
Field
Service
Manual 5A-1
Changed
by
ECN
#0036
6/21/83