Lcd - Pioneer KE-81ZBM-02 Service Manual

KE-81ZBM-OS
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3
*PD4081D
IC's marked by * are
MOS
type.
Be
careful
in
handling them because they are very
liable to be
damaged
by electrostatic induction.
•
Pin
Function (PD4081D)
Pin
No
Pin
Name
I/O Function and Operation
1
TAPE Output Turns TAPE power supply on when
"H".
2
CE24 Output Transfers data with IC702 when
"H".
3 CE12 Output
When
signal
switches form
"H" to "L" then back to "H", data
is
set
in
IC703.
4 PEE Output
Beep
output.
5,6 XO,
XI
—
Terminals for connection with
4.5MHz
crystal
oscillator.
7,8
VDD
—
Power
supply terminals (5V)
9
POWER
Input
Detects status of power switch. "H"
when
ON.
10
ACC
Input
Detects status of
ACC
power supply. "H"
when
ON.
.
11
BACK UP
Input
Detects
status of
back up power
supply.
"H" when ON.
12,
13
GND
—
Ground.
14
NC
—
Not connected.
15,
16
E01,
E02 Output
PLL
error outputs.
17
CE
Input Input for pulses from back
up power
supply detection
circuit.
18
FM
Input
Programmable
counter input. Receives Input from prescaler.
19
AM
Input
Same
as 18 about.
20 PSC Output Pulse swallow control output.
21
GND
—
Ground.
22
STANDBY Output "H"
when
IC601 is in
standby
status. "L"
when tape
is
operating
23
DOLBY NR Output "H" when Dolby NR
Is on.
24 ANTI-1
Output Causes LED
to flash
when
Anti-Theft
is
operating.
25 ANTI-2 Output "H"
when
"Anti-Theft"
is
displayed.
26
MS
Input
MS
input.
27
12
Output
28
11
Output IC601 control data terminal.
29 10
Output
30
SO Output
Serial data output.
31
SCK
Output Serial clock signal output.
32 SI Input Input for serial data
from
IC702.
33
VDD
—
Power
supply terminal. (5V)
34
END2/SD
Input Tape
mode:
Reverse tape
end
pulse detection terminal.
Tuner mode: SD
signal input terminal. "H"
when
a station
is
tuned
In.
|
1
4
Pin
No
Pin
Name
I/O
Function
and
Operation
35
END1/ST
Input Tape mode: Forward
tape
end
pulse detection terminal
Tuner mode: ST
signal input terminal. "H"
when
a stereo broadcast
is
being received.
36
MUTE
Output Mute
signal output. "H"
when mute
Is
on.
37
CM
STOP Ouptut Capstan motor
stop terminal
when
In
tape mode. "H"
When
the capstan motor
is
stopped.
38 MTL/LOC Output Tape mode:
Tape equalizer amplifier switching terminal. "H" when
in metal position.
Tuner mode:
"H" during seek operation.
39 K3
40 K2 Input Key
return input.
41 K1
42
KO
43 Sg
44 Sf
45 Se
46 Sd Output Key
strobe output.
47 Sc
48
Sb
49 Sa
50 CE75 Output Chip enable output
for IC901 (LCD driver).
51
PLAY Output
"L" during tape play.
52 Output Turns LCD
display on and
off. "L"
when LCD
display
• LCD(CWW1012)
NOTEiCOM terminal connects
to
all elements.
fig
.
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