NO AUDIO
IT IS ASSUMED THAT A PICTURE IS
PRESENT. IF THE PICTURE IS
BLANKED FOR SOME REASON, THE
AUDIO WILL BE MUTED. IF THE
SET TURNS ON, WITHOUT A
PICTURE, TROUBLESHOOT THE NO
PICTURE SYMPTOM.
IS AUDIO PRESENT ON
PINS 5 AND 6 OF 0226?
CHANGE THE SMALL
SIGNAL BOARD (SSB).
NO
IS 27 VOLTS DC
PRESENT ON PIN 10
OF 7702?
YES
CHECK
RESISTORS 3737
AND 3736. ARE
THEY OK?
CHECK 6972, 5971,
AND 5912.
YES
NO
BEFORE CHANGING THE
RESISTORS, CHECK PIN 10 OF
7702 TO GROUND FOR A SHORT.
NO
IS PIN 3 OF 7702 31
VOLTS WITH THE
SET ON?
YES
CHECK 7704 AND
RELATED
COMPONENTS.
NO
IS PIN 11 10 VOLTS
WHEN THE SET IS
TURNED ON?
YES
CHECK 7710 AND
RELATED
COMPONENTS.
NO
IS PIN 8 AT 0.0
VOLTS?
YES
IS THE SOUND
ENABLE LINE
HIGH?
NO
CHANGE THE SMALL
SIGNAL BOARD (SSB).
NO
CHECK 7701 AND
RELATED
COMPONENTS.
YES
IS AUDIO PRESENT ON
PINS 12 AND 7 OF 7702?
YES
CHECK SPEAKERS.
YES
CHANGE 7702.
NO
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