Read Panasonic CQ-C1021NE Service Manual online
IC601 : LC7237819C82
Pin
No.
No.
Port
Description
I/O(V)
FM(V)
AM(V) CD(V)
1
XIN
4. 5 MHz X’tal and
Connection
Connection
I
2.4
2.49
2.48
2
TEST2
GND connection
I
0
0
0
3
VREG
Bypass
condenser
connected.
O
2.9
2.99
2.99
4
VSSCPU
GND connection
-
0
0
0
5
CDC_DAT
A
A
CD changer data
I
0.01
0.01
0.01
6
N.C.
None
O
0.01
0.01
0
7
CDC_CLK CD changer clock
I
0
0.01
0.01
8
CDC_REM
_OUT
_OUT
CD
changer
Remote
out
O
0.01
0.01
0.01
9
LCD_DO
LCD data output
I
5.1
5.17
5.17
10
LCD_DI
LCD data input
O
4.95
5.01
4.92
11
LCD_CLK LCD clock
O
5
5.14
5.12
12
LCD_CE
LCD
chip
enable
output
O
0.1
0.18
0.23
13
CD_DO
CD data output
I
5.3
5.27
4.92
14
CD_DI
CD data input
O
0.01
0.01
5.12
15
CD_CLK
CD clock
O
5
5.17
5.1
16
CD_CE
CD chip enable
O
0.01
0.01
0.4
17
CD_EM
CD eject
O
0.02
0.02
0.02
18
CD_LM
CD loading
O
0.01
0.01
5.15
19
CD_S/L
CD
24PIN
connection
O
0.01
0
0
20
CD_WRQ
CD WRQ connection
I
5.3
5.29
0.1
21
CD_INSW
1
1
CD insert SW input
I
0.1
0.1
0.1
22
CD_SW2
CD MECHA SW2
I
5
5.14
5.13
23
CD_LIMI
T_SW
T_SW
CD limit SW
I
0
0
5.26
24
CD_DRF
CD DRF
I
0
0
5.15
25
CD_RST
CD reset
O
5
5.17
5.14
26
CD_DMUT
E
E
CD mute
O
0
0
0
27
N.C.
None
O
0
0
0
28
N.C.
None
O
0
0
5.18
29
PANEL
Panel detect
I
5.18
5.18
0
30
N.C.
GND connection
I
0
0
0
31
N.C.
GND connection
I
0
0
0
32
N.C.
GND connection
I
0
0
0
33
N.C.
None
O
0
0
0
34
N.C.
None
O
0
0
0
35
N.C.
None
O
0
0
0
36
N.C.
None
O
0
0
0
37
N.C.
None
O
0
0
0
38
N.C.
None
O
0
0
5.14
39
VDDPORT Power
supply
of
PORT
-
5
5.17
0
40
VSSPORT GND of PORT
-
0
0
0
41
N.C.
None
O
0
0
0
42
N.C.
None
O
0
0
0
43
N.C.
None
O
0
0
0
44
N.C.
None
O
0
0
0
45
N.C.
None
O
0
0
0
46
N.C.
None
O
0
0
0
47
N.C.
None
O
0
0.02
0.02
48
N.C.
None
O
0
0
0
49
PWR_CNT Power control
O
5
5.15
5.14
50
AMP_CNT Amp stand-by
O
5
5.15
5.13
51
AMP_MUT
E
E
Amp mute
O
5
5.15
5.15
52
N.C.
None
O
0.03
0.02
0.02
53
SSC
Tuner
search
sensitivity change
O
0.06
0.06
0.06
54
AF_MUTE AF mute
O
5
5.17
5.15
55
I2C_DAT
A
A
Electronic
VOL
data
O
5
5.17
5.16
Pin
No.
No.
Port
Description
I/O(V)
FM(V)
AM(V) CD(V)
56
I2C_CLK Electronic
VOL
clock
O
5
5.17
5.16
57
ANT_CNT Motor
antena
control
O
5
5.17
5.17
58
POWER_L
ED
ED
Power LED
O
0.1
0.17
0.17
59
N.C.
None
O
0.03
0.02
0
60
N.C.
(
BZ_OUT
)
)
None
O
0.03
0.02
0
61
N.C.
None
O
0.03
0.02
0
62
N.C.
None
O
0.03
0.02
0
63
N.C.
None
O
0.03
0.02
0
64
N.C.
None
O
0.03
0.02
0
65
N.C.
None
O
0.03
0.02
0
66
TEL_MUT
E
E
External
MUTE
input
I
5.2
5.33
5.33
67
BATT
Battery detection
I
5.2
5.33
5.33
68
MODE_B
ROTARY B input
I
0.54
0.62
0.02
69
RDS_CLK RDS clock
I
2.65
2.64
2.63
70
REM_IN
Remocon data input
I
5
5.12
5.11
71
MODE_A
ROTARY A input
I
0.6
0.59
0.06
72
CDC_STB CD
changer
strobe
input
I
0
0.62
0.06
73
NC
None
O
0.03
0.03
0
74
MONO
Compulsion MONO ON
O
0.03
0.03
0.03
75
AM_MODE AM change
O
8
0.06
8.06
76
FM_MODE FM change
O
0.08
8.06
0.08
77
N.C.
GND connection
I
0.1
0
0
78
INIT_C
Initial value C
I
0
0
0
79
INIT_B
Initial value B
I
2.5
5.15
5.14
80
INIT_A
Initial value A
I
3.23
3.25
3.24
81
VSSADC
GND connection
-
0
0
0
82
RDS_DAT
A
A
RDS data
I
0.3
0.01
2.56
83
ST
FM stereo input
I
5.3
5.25
0.34
84
SD_FM/A
M
M
Signal detection
I
3.2
3.51
0.32
85
N.C.
GND connection
I
0
0
0
86
RESET
Reset Input
I
OFF
OFF
OFF
87
ACC
Power supply
I
5.3
5.37
5.42
88
N.C.
GND connection
I
0
0
0
89
N.C.
GND connection
I
0
0
0
90
FM/AM_I
FC
FC
FM/AM IF input
I
1.4
1.45
1.45
91
N.C.
GND connection
I
0.1
0
0
92
SUBPD
None
O
2
2.09
1.39
93
VDDPLL
Power
supply
of
PLL
-
5
5.16
OFF
94
N.C.
None
I
0
0
0
95
OSC_FM/
AM
AM
FM/AM osc input
I
1.4
1.36
1.43
96
VSSPLL
None
-
0
0
0
97
N.C.
None
O
0.3
0.17
0.21
98
EO1
PLL
phase
comparison
error
output
O
2
2.08
1.38
99
TEST1
GND connection
I
0
0
0
100
XOUT
4. 5 MHz X’tal and
Connection
Connection
O
2.5
2.56
2.56
Note 1 :
Voltage measuerments are with respect to ground, with a
voltmeter (internal resistance : 10M ohms).
voltmeter (internal resistance : 10M ohms).
10 TERMINALS DESCRIPTION
10.1. Main Block
6
CQ-C1021NE
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