Aiwa VX-G143 Service Manual page 57

PLAYBACK PICTURE JITTERS
HORIZONTALLY
Is FG output level at pin
3 of CP1005 5Vp-p?
Yes
Is the voltage at pin 5 of
CP1005 1.2V?
Yes
Replace CYLINDER UNIT.
AUTO TRACKING DOES NOT
OPERATE
By manual tracking, does
the DC level at pin 24 of
IC1006 change?
Yes
In auto tracking, is the
voltage at pin 24 of IC1006
more than DC0.7V?
Yes
Replace IC1006.
TROUBLESHOOTING GUIDE
No
No
No
Does the CTL PULSE
(about 1.0Vp-p) appear at
No
pin 8 of IC1006?
1.0Vp-p
E-25
No
Yes
Replace CYLINDER UNIT.
Replace IC1006.
Check YCA, H/AMP circuit and
CYLINDER UNIT.
Check CONTROL HEAD.