GE Photofact Folder 21C115 Disassembly Instructions Manual page 8

TUBE PLACEMENT CHART
RATIO DEI IF AMP
US LI7 LI6
® ® ® (in.
VERT OUTPUT
TOP VIEW
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933
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TUBE FAILURE CHECK CHART
The following chart lists tubes whose failures are most likely to produce the indicated symptoms.
Refer to tube placement chart for location and type of tube.
POWER SUPPLY FAILURE
No raster, no sound - V19, V20, Fuse (Ml)
LOSS OF PICTURE OR SOUND
No pic, no sound, has raster - V2, V3, V4, V5
No pic, no sound, has snow - VI, V2, V3
No pic, has sound, has raster - V6, V21
Has pic, no sound - V7, V8, V9, V10
Overloaded picture -
SYNC FAILURE
No vert, sync - V12, V13, V14
No horiz. sync - V12, V15
No vert, or horiz. sync - V12
SWEEP FAILURE
No raster, has sound - V15, V16, V17, V18, V21
No vertical deflection - V13, V14
Poor vert, linearity or foldover -V13, V14
Poor horiz. linearity or foldover - V15, V16, V17
Narrow picture - V15, V16, V17, V18, V19, V20
Vert, off freq. - V12, V13, V14
Horiz. off freq. - V12, V15
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