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RX-28
CIRCUIT DESCRIPTION
2.Pin Description
Description
Tone circuit control termimal 1
Tone circuit control termimal 0
Record fevel control termimal 1
Record fevel control termimal 2
Record level control termimal 3
Record level control termimal 0
Microprocessor reset terminal
H = NORMAL
L= RESET
X2
4.19 MHz oscillator terminal
1
4.19 MHz oscillator terminal
O;/O
DOIN
DIOR)
wo
]hy
|=
L.MUTE
a
Deck line mute
PULL DOWN
with a resistor of several thousand ohms
H= MUTE OFF
L= MUTE ON
1
R/P (PDOLPB)
DOLBY REC/PLAY changeover
H= PLAY
L= REC
12
ON (PDOLON)
DOLBY ON/OFF changeover
H= DOLBY ON
L= DOLBY OFF
13
70uS (PCRO2)
Tape chrome selection
H= CrOQz
L= NORMAL
1
120 (PNORMAL)
4
15
EQSP
6
1
RECMUTE
BIAS
17
O
18
RIP
Oo
19
A/B
Oo
Tape normal selection
H= NORMAL
L= CrOz
Equalizer changeover
H= HI SPEED
L= NORMAL
Deck REC mute
PULL DOWN with a resistor of several thousand ohms
H= BIAS ON
Bias control
REC/PLAY changeover
B head
Playback equalizer A/B changeover
H= 8B
H= MUTE OFF
L= MUTE ON
L= BIAS OFF
H= REC
L= PLAY
L=A
ACSP
A mechanism motor speed control
H = NORMAL
L= HI SPEED
ACPM
A mechanism
motor control
MOTOR
ON
L= MOTOR OFF
ASOL
A mechanism solenoid control
= ON
L= OFF
BCSP
B mechanism motor speed control
NORMAL
L= HISPEED
BCPM
B mechanism motor control
MOTOR
ON
L= MOTOR OFF
BSOL
B mechanism solenoid control
ON
L= 0FF
vss
|
GND terminal
Connect to GND
KR3
GE connection detect terminal
KR2
UNUSED
+
KR1
UNUSED
KRO
Mechanism switch input 0
PHA
A reel rotation detect sensor input
Rotating with change
+
PHB
B reel rotation detect sensor input
Rotating with change
14
Inter-track detect input
Rotating with change
H = request
L= lo
request
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