Pioneer PL-L1000 Service Manual page 32

9 . 1 . 6
- - - - - - - - - ( N o a u t o c u t )
Retum failure
Defective elevator mecha-
nism Defective
elevator
control stage
Has the elevator mecha-
nism UP detector switch
been properlY dePressed ?
Does
the
voltage
dif-
ference between TP9 and
TP12 register a little above
10v ?
Defective drive coil / De-
fective drive transistor /
Incorrect magnet polaritY
Is the voltage difference
between TP8 and TP12
about 0.7 to 1.4 ?
Is there a voltage dif-
ference between TP8 and
TP10 when the tonearm is
moved by hand ?
Has pin (6) of IC9
switched to H level ?
Defective IC8, Q8
Has pin (10) of IC10 been
switched to H level ?
Defective retum FF stage
(ICg) or START/STOP
switch
T t
--------(normal
auto cut)
4,
q(
q
?r,
; {
9 . 1 . 7
Does the end sensor oP-
erate normally
(is there
sufficient
outPut
width
when passing the slit sec-
tion)?
Out of adjustment, or de-
fective sensor
Does the unistable mul-
tivibrator operate normal-
ly (including the
time
constant) ?
Defective IC18
or sur-
rounding comPonents