LG STUDIOWORKS 77M Service Manual page 15

NO TILT (NO ROTATION)
CHECK
Q504
WAVE FORM ?
YES
CHECK
15V LINE
AND 6.3V LINE ?
YES
CHECK
Q503 EMITTER
VOLTAGE ?
YES
TROUBLE IN
P501, TILT COIL
10. NO TILT (NO ROTATION )
NO
NO
NO
TROUBLE IN
IC401 ( MI COM)
TROUBLE IN
15V LINE, 6.3V LINE
TROUBLE IN
Q501~Q503