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TROUBLE
SHOOTING
GUIDE
(Continued)
5.
Return action does not take place after operating the Tuner or Deck while the Turntable is operating.
Does return action not
take place by pushing the
FUNCTION
SW Button
(Tuner /Deck) of the
Amplifier?
No
Is pulse-shape
voltage
applied
to
the STOP terminal of the PHONO
Remote Jack of the Amplifier?
Yes
Is pulse-shape voltage applied to the
base of Q17 inthe Turntablecircuit?
Yes
Is pulse-shape voltage inputted to
the 3-pin
REJECT
input terminal
of the microcomputer (uPD554C)?
Return
the
tone
arm
by pushing
the
REJECT
button
of the Turn-
table.
No
Is the voltage inputted to Pin 3 of
the microcomputer low?
Yes
Check Q17.
Does return action
of only the Tuner not
take place?
Does return action
of only the Deck not
take place?
No
No
: See Page 8.
See Page 9.
oO
ls direct call made?
See (3).
See (4).
Yes
Is direct call made?
No
Yes
Check the Amplifier circuit.
e D11 is opened.
e Solder touch and tunnel
e Broken pattern
Check the Amplifier circuit.
e
D12 is opened.
e Solder touch and tunnel
Solder tunnel and touch
e Broken pattern
of the jack terminals
Broken pattern
Inadequate contact be-
tween plugs and jacks
Broken plug cord
Solder tunnel and touch
Broken pattern
@ Check O17. (Short-circuit)
Check the circuit.
(Solder touch and tunnel,
broken pattern)
The Turntable
unit is defec-
tive.
e
Refer
Service
micro-
the
the
to
of
Manual
computer-controlled
Turn-
table (TP M15).
=4Q =
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