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TROUBLE
SHOOTING
GUIDE
(Continued)
4.
Pause function does not work after pushing the CUE/REJECT button (end of play) ... after about 4 seconds
t
Same as (3)
from micro-
1 computer CUE
Note: Q11
in the dotted box above must be changed to Q10 when the CUEING
is set in
"UP" mode.
e
When the tone arm is resting on the arm-
rest, PC2
is set in ''L'' level. Therefore,
no signal comes
out when the CUEING
is set
in "UP"
or
"DOWN"
position
because QO9 is set in "'OFF'' mode and
Q12 in "ON" mode.
e
As CUE
is set in ''H" level with the
CUEING in "UP" position, 010 becomes
"'ON" mode and pulses are generated by
C02 and R20. As CUE is set in '""L" level
with the CUEING
in "DOWN" position,
Q11
becomes
"OFF'' mode and pulses
are generated by CO3 and R21.
from micro-
computer
RESET
eS
from PC2
IC EQUIVALENT CIRCUIT & BLOCK DIAGRAM
DUAL A-TYPE FLIP-FLOP IC LC4013B
LC4013B
RESET 4(10 pin)
§
$
2(12 pin)
CLOCK 3(11 pin)
amas ae a
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