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Mitsubishi Electric CQ-JB3160A Service Manual: Terminals Description

Am/fm mpx electronic tuning radio with cd player.
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7 TERMINALS DESCRIPTION

7.1.
Main Block
IC601 : C2BBGF000256
Pin
Port
No.
1
SUBVOLCLK
(Ground pull-down)
2
DIV SW
Diversity switch
3
SET S2
System function setting
4
AVSS
Ground
5
SET S0
System function setting
6
SET S1
System function setting
7
AVREF
+5V power supply
8
SET R0
System function setting
9
SET R1
System function setting
10
SET R2
System function setting
11
CD DI
CD data output
12
CD DO
CD data input
13
CD CLK
Shift clock for CD data
14
PLL DI
PLL data input
15
MBUSY OUT
M-BUS busy
16
MBUSY IN
M-BUS busy
17
MDATA
M-BUS data
18
MCLK
M-BUS clock
19
PLLDO
PLL data output
20
PLLSTB
PLL strobe
21
PLLCLK
PLL clock
22
MUTE A
Mute signal
23
VOL STB
Electric volume strobe
24
VOL CLK
Electric volume clock
25
VOL DATA
Electric volume data
26
AMP CONT
Power amp. stand-by
27
CD PON
CD power control
28
CD ON
CD control LSI enable
29
SW1
CD disc-in SW
30
SW3
CD disc-out SW
31
TUNEA
Tuner switch signal
32
TUNEB
Tuner switch signal
33
GND
Ground
34
VOLINA
Volume switch signal
35
VOLINB
Volume switch signal
36
CD RESET
CD controller reset
37
MAIN
Main antenna selection
38
SUB
Sub. antenna selection
39
BIBIRI CNT
Rattle noise check control
40
SECDI
Security data input
41
SECDO
Security data output
42
SECCLK
Security
clock
43
SECCS
Security ROM select
44
FreqOUT
Tone/Burst frequency
45
TONE/TRG
Tone/Triger control
46
S.PULSE
Speed pulse input
47
Ga INPUT
GALA signal input
48
ST
FM stereo detection
49
LCD CONT
LCD back ligth on/off
50
BUZZER
Buzzer output
51
NC
No connection
52
KS0
Key strobe
53
KS1
Key strobe
54
KS2
Key strobe
55
KS3
Not used
56
KR0
Key data
57
KR1
Key data
58
KR2
(Groung pull-down)
59
KR3
(Groung pull-down)
60
RESET
Reset input
61
M-DATA IN
M-BUS data
62
CD EJECT
CD eject SW
63
BATTDET
Battery level detection
64
ACCDET
ACC level detection
65
MUTE_P
Power amp. mute
66
ANT
Motor antenna power on/off
Descriptions
I/O Vol.
-
I
O
-
O
O
-
I
I
I
O
I
O
I
O
I
I/O
O
O
O
O
O
O
O
O
O
O
O
I
I
I
I
-
I
I
O
O
O
O
I
O
data
read
/
write
O
O
O
O
I
I
I
O
O
-
O
O
O
-
I
I
-
-
I
I
I
I
I
O
O
Pin
Port
No.
67
GND
68
VDD
69
X2
(V)
70
X1
0
71
GND
5.1
72
XT2
0
73
XT1
0
74
AVDD
0
75
AV REF0
0
76
VAM/FM
5.1
77
REMOTE_A
0
78
BIBIRI.A
0
79
CLIPCONT
0
80
REMOTE_D
2.4
Note 1 : Voltage measuerments are with respect to ground,
1.4
4.9
with a voltmeter (internal resistance : 10M ohms).
5.0
0
7.2.
Display Block
0
4.9
IC901 : YEAMSM6786
4.9
Pin
Port
0
No.
0
1- 6 SEG1 - 6
0
7
SEG7
0
8-20 SEG8-20
0
21
VDD
0
22-29 SEG21 - 28
0
30
-
4.9
31-34 KR0 - 3
4.9
35,36 -
4.9
37-40 KS1 - 4
0
41
KS5
4.8
42
LOAD
4.7
43
CLK
0.5
44
DATA I/O
0
45
INT
0
46
/RESET
0
47
LED
0
48
3/4 SEL
4.9
49
VDD
8.3
50
OSC
5.0
51
VSS
0
52
TEST
0
53-56 COM4 - 1
0
0
0
0
0
5.0
0.3
4.8
0
-
0
0
0
-
0
1.6
0
0
4.8
4.9
4.8
5.0
0
0
0
7
MITSUBISHI / CQ-JB3160A / CQ-JB0160A
Descriptions
Ground
+5V power supply
Crystal oscillator
Crystal oscillator
Ground
Crystal oscillator
Crystal oscillator
+5V power supply
+5V power supply
AM/FM vcont
(+5V pull-up)
(Ground pull-down)
Not used
(Ground pull-down)
Descriptions
LCD segment data
No connection
LCD segment data
+5V power supply
LCD segment data
No connection
Key data input
No connection
Key scanning
Not used
LCD LSI chip enable
LCD clock
LCD/Key dat
LCD interrupt
Reset
Not used
(Connecting to ground)
+5V power supply
CR oscillator
Ground
(Connecting to ground)
LCD common
I/O Vol.
(V)
-
0
-
4.9
-
0
-
2.6
-
0
-
2.7
-
2.5
-
4.9
-
5.0
I
0
-
5.0
-
0
-
-
-
0
I/O Vol.
(V)
O
2.3
-
-
O
2.3
-
5.0
O
2.3
-
-
I
4.4
-
-
O
3.5
-
-
I
0
I
0
I/O
0
O
3.8
I
4.0
-
-
-
0
-
5.0
-
2.2
-
0
-
0
O
2.3

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Cq-jb0160a

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