JVC TV-13142 Service Manual page 47

CYLINDER NOT ROTATING
DURING PLAYBACK AND
RECORDING
Is the voltage at pin 6 and
7 of CP1005 about DC2.6V ?
Yes
In playback, is the voltage
at pin 1, 2, 3 and 4 of
CP1005 about DC6V ?
No
Replace IC1004.
AUDIO SHAKES
Is AUDIO HEAD scratched ?
No
Does pin 87 of IC1001
output a 3.0Vp-p square
wave ? 3.0Vp-p
Yes
In playback, is the voltage
at pin 3 of CP1004 about
DC1.8V ?
Yes
Check AUDIO BLOCK.
TROUBLESHOOTING GUIDE
No
Yes
Yes
No
No
In playback, is the voltage at
pin 12 of IC1001 DC2.5V ?
Yes
Check pins 4 and 5 of IC1004
lines.
Replace CYLINDER MOTOR.
Replace AUDIO HEAD.
Replace CAPSTAN DD MOTOR.
No
Replace IC1001.
TV-13142
TV-13142W
47