— 41 —
I/O
O
O
—
—
I
—
—
I
—
—
—
O
O
I
O
O
O
I
O
I
I
O
O
I
O
I
—
I
I
I
I
I
O
I
O
O
I
I
—
—
—
—
—
—
—
—
—
O
—
—
Description
Fluorescent display tube grid 13 output
Fluorescent display tube grid 14 output
Not used. Connected to 5V
Not used. Connected to 5V
Signal processing IC data sync input
Not used. Connected to GND
Not used. Connected to GND
Remote control input
Not used. Connected to GND
Not used. Open
Not used. Open
Loading OUT direction output
Loading IN direction output
Signal processing IC SENSE input
Signal processing IC command latch output
Signal processing IC mute output
D/F IC command latch output
Stabilizer detect sensor input
Control A1 output
Control A1 input
stabilizer detect sensor switch
Signal processing IC command clock output
Laser diode ON/OFF switching output
Signal processing IC data input
Signal processing IC SUBQ read clock output
Signal processing IC SUBQ input
Terminal through 5V
AD converter reference voltage input
Key input
Key input
Key input
D/F switching rotary switch input
Normal/ADJ/AFADJ mode switching
Input of IN switch and OUT switch
MODEL switching terminal
(LL: XE520 LH: XB720 HL: XB820 HH: XB920)
Model selector terminal
(LL: XE520 LH: XB720 HL: XB820 HH: XB920)
A/D converter GND input
Microprocessor reset input
8 MHz X'tal connection terminal
8 MHz X'tal connection terminal
GND
Not used. Open
Not used. Connected to GND
5V supply terminal
Voltage supply terminal for option pulldown FDP
Not used. Open
Not used. Open
RF amplifier, laser power hold output
Not used. Open
Not used. Open
Pin Name
13G
14G
NC (+5V)
+5 V (PEO/EC1/1NT0)
SCOR
GND (PE2/1NT2)
GND (PE3/1NT3/NM1)
RMIN
GND (PE5)
X (OPEN)
X (OPEN)
LDOUT
LDIN
SENS
XLT
D-MUTE
PGML
SENSOR IN
BUSOUT
BUSIN
SENSOR SW
CLK
LDIN
DATA
SQCK
SUBQ
+5V
AVREF
Key 0
Key 1
Key 2
FILTER SW
ADJ/AFADJ
LOADSW
MODEL SEL1
MODEL SEL2
AVSS
RST
EXTAL
EXTAL
VSS
TX
TEX
VDD (+5V)
VFDP (-30V)
XSEL
REINIT
REGF
A-MUTE
NC
• IC 801 (SYSTEM CONTROL) CXP82832-009Q
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
