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The slowing-down time and the stop position of the turntable
rotary motor are detected by inputof PIN No.43 DISC TBl SW.
Approx. 2 sec after the turntable starts rotating, the STOP
control signal is input.
When the disc address moves from [3] to [1], or [1] to [3], the
disc address detection pulse (20 msec) is passed through.
From the time when DISC TBL SW, as the Stop control signal,
changes [l] to
to the time when it changes
output
of PIN No.42 DISC CHG MTR + for clockwise rotation, and
PIN No.41 DISC CHG MTR - torcountsrclockwlse rotation are
recognized respectively as the pulse signal with a cycle of
approx. 20 msec. (Approx. 100 msec)
If rotation is clockwise when DISC TBl SW changes
to [L],
DISC CHG MTR
+
(42PIN) is set at [l], and DISC CHG
MTR - (41
at
for 1Omsec,simultaneously. As a result,
the disc table is stopped.
For counterclockwise rotation, DISC CHG MTR - (41
is
set at [L], and DISC CHG MTR + (42PIN), at
for 10 msec,
simultaneously. As a result, the turntable is stopped.
In the cases a), b), and
c)
below,
DISC CHG
+
(42PIN) and DISC CHG
- (41
are
~et
at
to
"ERROR".
a) Input of DISC TBL SW(43PIN) does not,change within 1 to
6 seconds after the turntable starts rotating.
b) DISC TBl
is not set
approx. 5 seconds
after detecting the STOP control signal.
c) DISC TBl
is not set at
approx. 5 seconds
after
the address detection pulse in the turnta-
ble position detection mode.
* For error recovery, turn the POWER switch OFF and then ON
again; the normal state is recovered and the turntable position
detection mode starts.
* Press the UP and DOWN keys simultaneously during the
"ERROR" display to indicate "rot. ERROR" for
seconds,
AM
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F D
Rotary Error Display
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