Pioneer CT-1060W Service Manual page 54

CT-1060W, CT-S77W
12.3 SIGNAL AND INDICATOR CIRCUIT CONTROL
The signal and indicator circuits are controlled
by the PD4061 microcomputer. The tape transport
units in this model are switched to the various
operating modes mechanically by the respective
mode buttons. (Since the capstan motor is used as
a drive source, the mode buttons can be operated
by light touch.) When the COPY buttons is pressed
to start tape copy mode, both tape decks are
switched mechanically — tape I (on the left hand
side) to playback mode, and tape II (on the right
hand side) to recording mode. Although there is
no need for microcomputer control of the tape
transport mechanism itself, signal circuit switching,
muting circuit timing control, and indicator
control is all handled by the microcomputer.
PD4061 Specifications
1. System Clock
System clocks are generated by an RC oscillator
employing a built-in oscillator circuit. Oscillating
frequency is 200 kHz.
The specified timing set time is the set time when
the system clock frequency is 200 kHz.
2. Input Reception Conditions
Input sampling of 5 to 10 ms prevents chattering
when inputs are received, and also prevents mis-
operation by external noise.
3. Relay Play Mode
A major feature of this tape deck is relay play-
back from deck I to deck II and from deck II to
Output
Deck | Deck ! Deck |
—
PLAY IND RELAY IND
KU
(STOP)
t t t rt
transport Hanepert transport
ranspor transport ramps b=
(I) (I) (t) ] (I)
———S—
——
(STOP) or
(STOP/PAUSE) WEF,
(STOP)
Blinking Blinking | Blinking | Blinking
on and off| on and off} on and off | on and off
+..__
PLAY {
4+—
el ees
STOP or
P.
(STOP) or
| STOP
PLAY or
PLAY/PAUSE
(STOP/PAUSE)
PLAY {
(STOP) or
(PLAY) or
(STOP)
(STOP/PAUSE)
(PLAY) or
(PLAY/PAUSE)
{ | or ff on
PLAY or
ISIOF) PLAY/PAUSE
(PLAY) {
(STOP) or
PLAY | (stop/PAUSE)
(PLAY) or
(PLAY/PAUSE)
ON or
Blinking
on and off
Blinking Blinking
on and off on and off
Blinking
on and off
Blinking
on and off
OFF
PLAY or
PLAY/PAUSE
ON or
Blinking
on and off
(PLAY/PAUSE)
——
' Push |
t+
iL,
STOP or
STOP/PAUSE
{ Push ON
OFF OFF
(STOP) or
(STOP/PAUSE)
—_—__|—_.
<= —yT
Blinking Blinking
on and off on and off
i
PLAY or
PLAY/PAUSE
Push ON
*( ) denotes mode with motor stopped.
73
ON or
Blinking
on or off
PLAY or
PLAY/PAUSE
Blinking { Blinking
on and off on and off
Fig. 12-3 PD4061 Input/output table at RELAY PLAY mode