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PL-LI
Clc'cl
9 . 1 . 5
Lead-in failure
START/STOP switch pres-
sed
immediately
after
completion of return op-
eration ?
Wait a few seconds before
pressing again,
Has
the
UP
det€ctor
switch
(elevator
me-
chanism)
been properly
depressed ?
Defective elevator mecha-
nism or defective elevator
control stage
Defective drive coil, de-
fective drive transistor, or
incorrect magnetic polari-
ty.
Does the
voltage
drop
across TP9 and TP12 read
a little above 10V ?
Is there a voltage dif-
ference of about 0.7 to
1,4V between TP8 and
TP1O ?
Does a voltage difference
exist
between TP8 and
TP10 when the tonearm
is moved bv hand ?
Defective tracking sensor
stage
Has pin
(10)
of
IC10
been switched to H level ?
Has pin (6) of IC9
switched to H level ?
Defective lead-in FF stage
(IC10), defective START/
STOP switch.
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