Atari 2600 Field Service Manual page 155

Jh
Consumer Product Service
VCS Manager of Technical Support
ATARI"
SERVICE BULLETIN
MODEL: 2600A
Video Computer
System
/
DATE:
February V ,
1982
PROBLEM
- -
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RF Interference t h a t does not c l e a r up using normal a d j u s t m e n t methods.
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A series of lines and bright grid distortions o n t h e s c r e e n accompanied by a
loud hum on t h e audio c a r r i e r even when t h e audio and video a r e properly
adjusted.
T h e above problems m a y temporarily disappear when t h e unit is turned off f o r
a few minutes and then turned on again.
CAUSE
These 2600A problems have been diagnosed by A t a r i as being caused by a
leaking o r d e f e c t i v e C24l (.I microfarad) a n d l o r C242 (.I microfarad) l o c a t e d
between t h e power jack and voltage regulator.
SOLUTION
Replace t h e d e f e c t i v e components with o n e s f r o m your kit. Make certain t h e
replacement components a r e r a t e d a t a v a l u e 50V o r greater.