Symptom Checklist - Atari 130XE Service Manual

The Symptom Checklist is designed to assist you arrive at a rapid diagnosis for problems.
Each symptom is
Disassembly/Assembly, adjustments and/or replacements are on the pages following this

Symptom Checklist.

SYMPTOM
Snowy Screen
Black/Gray Screen
Green/Yellow Screen
Solid Blue Screen
No Color or Bad Color Bars
No Color Bars on TIA test
No Lights (L1, L2, L3)
No Gray Bars
Upside down Alphanumerics
or Player Field
Some Keyboard Keys Fail
All Keyboard Key Fail
Tones Missing During Sound
or Games
Console (Game) Switches
will not Function
ROM Test Failed
RAM Test Failed
130XE Personal Computer
Field Service Manual
SECTION 4
SYMPTOM CHECKLIST
accompanied by
POSSIBLE CAUSES
Switch Box, Power Supply,
Channel Select Switch,
RF Modulator or Cable
Damage
+5VDC, L4-L8,
CR8, Power Plug, SW1, Y1
U27, U1-U9, U12, U13
U24, Q3, Y1, Q2, Q4, U19
VR1 Adjust, U20, U2, U19,
Q3, Y1, RF Modulator
U19
LED 3, LED Pin 1, +5A
Power Supply, U23, Q9
Q10, Pin 3, Pin 4
RF Modulator, Y1, VR1, Q3,
U19
U20, U19, U3
U24, Keyboard
U24, Keyboard
U24, L11, L12
U19, U23
U12, U13, U14. U18, U22
U1-U9, U7, U14, U22
4-1
some. possible causes.
Adjust or replace
(See Page 4-4)
ANTIC,
Replace
Replace
Replace
Adjust or replace (VR1
Adjust – Page4-2; RF Modu-
lator Adjust Page 4-4)
Replace
Replace. If problem is LED –
replace the LED Board
Adjust or replace (VR1
Adjust – Page4-2; RF Modu-
lator Adjust Page 4-4)
Replace
Replace (See Page 4-4)
Replace (See Page 4-4)
Adjust or Replace
(Adjust Audio Figure 4-1)
Replace
Replace
Replace
Instructions for
REMEDY