TROUBLESHOOTING GUIDE
E-25
Is FG output level at pin
3 of CP1005 4Vp-p ?
No
Yes
Replace CYLINDER UNIT.
Replace IC1001.
No
Yes
Is the voltage at pin 5 of
CP1005 1.3V or
When slowing CYLINDER, is
the voltage about 5V ?
Replace CYLINDER UNIT.
PLAYBACK PICTURE JITTERS
HORIZONTALLY
AUTO TRACKING DOES NOT
OPERATE
By manual tracking, does
the DC level at pin 6 of
IC1001 change ?
Yes
No
In auto tracking, is the
voltage at pin 6 of IC1001
more than DC1.85V ?
Yes
No
Replace IC1001.
Yes
No
Check CONTROL HEAD.
2.0Vp-p
Does the CTL PULSE
(about 2.0Vp-p) appear at
pin 96 of IC1001 ?
Check HEAD AMP circuit and
CYLINDER UNIT.
