– 46 –
1
XIN
I
A crystal oscillator (4.5MHz) is connected between these pins.
22
XOUT
O
2
NC
–
Not connected.
3
CE
I
To enable the IC. Active "H".
4
DI
I
Digital data input from CPU (LC87F65C8A) when relevant key is operated.
Active "H".
5
CL
I
To clock in the data DI.
6
DO
O
Digital data output to CPU (LC87F65C8A).
7
T-BASE
O
Outputs a reference clock signal (8Hz) for the clock.
8
MONO / BEAT
O
Outputs "H" when MONO / BEAT is switched.
Output "L" or "H" as follows:
9
FM / SW
O
2 BAND
3 BAND
3 BAND
AM
FM
LW
MW
FM
MW
SW
FM
H
L
H
H
L
H
L
L
Outputs "L" or "H" as follows:
10
MW / SW
O
2 BAND
3 BAND
3 BAND
AM
FM
LW
MW
FM
MW
SW
FM
L
L
H
L
L
L
H
L
11
IF-MUTE
O
To control internal counter.
12
IF-IN
I
General purpose counter input.
13
TUNE
I
Receives "L" when station is tuned.
14
NC
–
Not connected.
15
AMIN
I
Receives the AM local oscillator frequency signal.
16
FMIN
I
Receives the FM local oscillator frequency signal.
17
VDD
–
Supply power to IC (+5V).
18
PD
O
PLL charge pump output.
19
AIN
I
The MOS transistor used for PLL active low pass filter.
20
AOUT
O
21
VSS
–
Ground.
IC, LC72131D
Pin No.
Pin Name
I/O
Description
Summary of Contents for XH-A1000
Page 19: ... 19 SCHEMATIC DIAGRAM 1 MAIN 1 4 AMP SECTION CONNECT 1 3 ...
Page 20: ... 20 SCHEMATIC DIAGRAM 2 MAIN 2 4 POWER SUPPLY SECTION ...
Page 21: ... 21 SCHEMATIC DIAGRAM 3 MAIN 3 4 DECK SECTION ...
Page 22: ... 22 SCHEMATIC DIAGRAM 4 MAIN 4 4 PRO LOGIC SECTION ...
Page 23: ... 23 SCHEMATIC DIAGRAM 5 FAN ...
Page 25: ... 25 SCHEMATIC DIAGRAM 6 FRONT CONNECT 2 3 DECK DECK MOTOR ...
Page 27: ... 27 SCHEMATIC DIAGRAM 7 OPERATE KEY MIC LED A D ...
Page 29: ... 29 SCHEMATIC DIAGRAM 8 LOW AMP ...
Page 31: ... 31 SCHEMATIC DIAGRAM 9 5CH AMP ...
Page 33: ... 33 SCHEMATIC DIAGRAM 10 VIDEO I O VIDEO JACK VIDEO 3 CONNECT 3 3 ...
Page 34: ... 34 SCHEMATIC DIAGRAM 11 SCART ...
Page 36: ... 36 SCHEMATIC DIAGRAM 12 TUNER ...
Page 38: ... 38 SCHEMATIC DIAGRAM 13 PT ...
Page 40: ... 40 FL BJ733GK GRID ASSIGINMENT ANODE CONNECTION PIN CONNECTION ...
Page 41: ... 41 FL BJ734GK GRID ASSIGINMENT ANODE CONNECTION PIN CONNECTION ...
Page 42: ...IC BLOCK DIAGRAM 42 ...
Page 43: ... 43 ...
