– 33 –
– 34 –
5-13.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC801 M38172M4-171FP (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Function
1
T.REEL
I
Take-up reel rotation pulse input from the rotation detect sensor (IC82)
2
S.REEL
I
Supply reel rotation pulse input from the rotation detect sensor (IC81)
3
METER.LCH
I
Signal input for the level meter drive (L-ch)
4
METER.RCH
I
Signal input for the level meter drive (R-ch)
5
AMS.IN
I
Auto music sensor signal input terminal “H”: AMS detect
6
DOOR/STOP.SW
I
Mechanism stop detect switch (S81) input terminal
7
CLOSE.SW
I
Not used (fixed at “H”)
8
OPEN.SW
I
Not used (fixed at “H”)
9
CAM.SW3
I
Not used (fixed at “H”)
10
CAM.SW2
I
Not used (fixed at “H”)
11
CAM.SW1
I
Not used (fixed at “H”)
12
CAM.SW0
I
Not used (fixed at “H”)
13
CAP.M ON/OFF
O
Capstan motor (M902) on/off control signal output terminal “H”: motor on
14
ASIST.M.UP
O
Assist motor drive signal output terminal Not used (pull down)
15
ASIST.M.DOWN
O
Assist motor drive signal output terminal Not used (pull down)
16
REEL.M.FWD
O
Reel motor (M901) drive signal output to the BA6219B (IC803)
17
REEL.M.REV
O
Reel motor (M901) drive signal output to the BA6219B (IC803)
18
EJECT.V (6.5V)
O
Reel motor (M901) eject control signal output terminal “H” active
19
FF/REW.V (4.4V)
O
Reel motor (M901) FF/REW control signal output terminal “H” active
20
PLAY.V (2.5V)
O
Reel motor (M901) play control signal output terminal “H” active
21
TYPE.IV
I
Metal detect switch (S83) input terminal “H”: metal
22
HALF.SW
I
Half detect switch input terminal Not used (fixed at “H”)
23
TYPE.II
I
CrO
2
detect switch (S82) input terminal “H”: CrO
2
24
TAB.SW
I
Not used (fixed at “H”)
25
POWER.IN
I
AC in detect signal input terminal “H”: AC in
26
SIRCS.IN
I
Sircs signal input from the remote control receiver (IC901)
27
RESET
I
System reset signal input from the reset signal generator (IC804) “L”: reset
“L” is input for several 100 msec after power on, then it changes to “H”
28
XCIN
I
Sub system clock input terminal Not used (fixed at “L”)
29
XCOUT
O
Sub system clock output terminal Not used (open)
30
XIN
I
Main system clock input terminal (4 MHz)
31
XOUT
O
Main system clock output terminal (4 MHz)
32
VSS
—
Ground terminal
33
VER.200/190
I
Setting terminal for the version (fixed at “L”)
34
POWER.OUT
O
Power on/off control signal output terminal “L”: power on Not used (open)
35
MONITOR.TAPE/
SOURCE
O
Audio monitor selection signal output terminal “H”: tape monitor, “L”: source monitor
37
OSC H/L
O
Calibration tone frequency high/low control signal output terminal “L”: frequency low
38
CAL.ON/OFF
O
Calibration tone on/off control signal output terminal “H”: on, “L”: off
39
REC.M.ON/OFF
O
Record muting on/off control signal output to the CXA1598S (IC303)
“L”: record muting on
40
BIAS.ON/OFF
O
Recording bias on/off control signal output terminal “H”: bias on
41
DOL.CON
O
Dolby B/C type or dolby on/off selection signal output to the CXA1563S (IC302, 307)
“H”: dolby C type, “L”: dolby off (center voltage: dolby B type)
42
SEG.IV
O
Metal on/off control signal output or segment drive signal output to the fluorescent indicator
tube (VFD901) (for TYPE IV light up)
Pin No.
Pin Name
I/O
Function
43
SEG.DOL.C
O
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for DOLBY NR C light up)
44
SEG.DOL.B
O
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for DOLBY NR B light up)
45
SEG.PROPER
O
Segment drive signal output to the fluorescent indicator tube (VFD901)
(for TYPE I, II light up)
46
SEG.FIL.ON/OFF
O
Multiplex filter on/off control signal output or segment drive signal output to the fluorescent
indicator tube (VFD901) (for FILTER light up) “H”: multiplex filter on
47
SEG.DOL.S.
ON/OFF
O
Dolby S type on/off selection signal output to the CXA1563S (IC302, 307) or segment drive
signal output to the fluorescent indicator tube (VFD901) (for DOLBY NR S light up)
“L”: dolby S on
48
NC
O
Not used (open)
49
SEG01
O
50
SEG02
O
51
SEG06
O
52
SEG07
O
53
SEG03
O
54
SEG05
O
55
SEG04
O
56
SEG08
O
57
SEG16
O
58
SEG09
O
59
SEG10
O
60
SEG14
O
61
SEG15
O
62
SEG11
O
63
SEG13
O
64
SEG12
O
65
SEG.CAL
O
Segment drive signal output to the fluorescent indicator tube (VFD901) (for CAL light up)
66
SEG.I
O
Recording equalizer type I select signal output or segment drive signal output to the
fluorescent indicator tube (VFD901) (for TYPE I light up)
67
SEG.II
O
Recording equalizer type II select signal output or segment drive signal output to the
fluorescent indicator tube (VFD901) (for TYPE II light up)
68
G5-DISPLAY
O
69
G4-SEC
O
70
G3-MIN
O
Grid drive signal output to the fluorescent indicator tube (VFD901)
71
G2-RCH
O
72
G1-LCH
O
73
VCC
—
Power supply terminal (+5V)
74
VEE
—
Power supply terminal (–24V)
75
AVSS
—
Ground terminal (for A/D converter)
76
VREF
I
Reference voltage (+5V) input terminal
77
KEY2
I
Key input terminal (A/D input) (S906 to S909)
·
,
P
PAUSE, MEMORY, RESET keys input
78
KEY1
I
Key input terminal (A/D input) (S901 to S905)
p
, AMS
0
, AMS
)
,
r
REC,
R
REC MUTING keys input
79
TIMER.SW
I
Half detect switch (S86) input terminal
80
DOLBY.SW
I
DOLBY NR switch (S913) input terminal (A/D input)
Segment drive signal output to the fluorescent indicator tube (VFD901)