RXD-M33V
10
CIRCUIT DESCRIPTION
• CD Tray Mechanism Control
1
Port Logic
8. Port Logic
• Cassette Deck Reel Pulse (X29, IC301)
• Voltage Protection (X29, IC301)
• CD Protection (X29, IC301)
Input Voltage (V)
(Pin 97)
Logic
0.00~1.93
LOW
1.95~2.91
-
2.92~4.80
HIGH
Port Logic
(Pin 92)
Protection
LOW
OFF
HIGH
ON
Input Voltage (V)
(Pin 91)
Protection
0.00~1.50
ON
1.51~3.49
OFF
3.50~4.80
ON
Input Voltage (V)
(Pin 97)
Protection
0.00~2.49
ON
2.51~4.80
OFF
✽
A/B : Pin 21(X28, IC1)
✽
A/B-1 : Pin 52 (X29, IC301)
✽
A/B-2 : Pin 53 (X29, IC301)
Deck Mode
R/P(Pin78) BIAS(Pin77)
A/B-1(Pin52) A/B-2(Pin53)
STOP
L
L
L
L
PLAY
L
L
L
L
FF
L
L
L
L
RWD
L
L
L
L
REC
H
H
H
H
ARM
H
H
H
L
REC PAUSE
H
L
H
L
X29, IC301
✽
A/B
Low
Mid
High
✽
A/B-1
L
H
H
✽
A/B-2
L
L
H
2
Timing Chart
M +
: Motor control for CD tray open direction
HIGH : Motor ON
M -
: Motor control for CD tray close direction
HIGH : Motor ON
OPEN SW
: Tray open detection switch
LOW : Switch ON
CLOSE SW : Tray close detection switch
LOW : Switch ON
Loading Motor
OPEN
CLOSE
BRAKE
M +
HIGH
LOW
HIGH
M -
LOW
HIGH
HIGH
• Thermal Sensor (X29, IC301)
• Cassette Mechanism Control
PLAY
REC
ARM
NOR
CrO2
NOR
CrO2 NOR CrO2
A/B (Pin 21)
L
L
H
H
M
M
B
ø
/
¿
(Pin 22)
L
H
L
H
L
H
• PB/REC AMP (X28, IC1)
