JVC HR-XVC1U Service Manual page 42

TROUBLESHOOTING CUIDE
At play,the picture
jitters vertical minutely
Is FG wave of CP3001
NO
Change
at pin 11 5V ?
CYLINDER MOTOR
5V
YES
NO
Change IC3001
Is pin 12 of CP3001 2.6V ?
YES
Change CYLINDER MOTOR
Auto tracking
does not operate
Does the CLT pulse
signal (about 2.5Vp-p)
In auto tracking,is the
NO
NO
Check CONTROL HEAD.
appear at pin 7 of IC3001.
voltage at pin 24 of IC3001
2.5Vp-p
more than DC 0.2V?
YES
YES
CHANGE IC3001
1-36