Panasonic CQ-C8401W / CQ-C7401W Service Manual ▷ View online
11.1. Main Block
IC601 : C2CBJG000589
Pin
No.
Port
Description
(I/O)
(V)
FM
AM
CD
1
PANEL OPEN PANEL OPEN detection
I
0
5.2
5.2
2
PANEL
CLOSE
CLOSE
PANEL CLOSE detection
I
0
0
5.2
3
NC
No Connection
-
-
-
-
4
BATT
BATT detection
I
4.8
5
5
5
ACC
ACC detection
I
4.8
5
5
6
SDA
Electronic VOL data
I/O
4.9
4.9
4.9
7
SCLK
Electronic VOL clock
O
4.9
4.9
4.9
8
NC
No Connection
-
-
-
-
9
Vss
Power supply GND
I
0
0
0
10
ST
FM ST detection
I
5.1
5.2
5.2
11
PLL DI(MO)
PLL data output
O
0.6
0
0
12
PLL DO(MI)
PLL data input
I
5.2
5.2
5.2
13
PLL CLK
PLL clock output
O
4.9
4.9
4.9
14
PLL CE
PLL chip enable output
O
0
0
0
15
CD RST
CD deck reset output
O
4.9
4.9
4.9
16
SUB SI
SUB u-com Data trans
SO
0.6
0.6
0.8
17
NC
No Connection
-
-
-
-
18
SUB SO
SUB u-com data recept
SI
4.4
4.4
4.4
19
CH DATA
Changer; data
transmission from XM;
FLASH W SO
transmission from XM;
FLASH W SO
SI
1.6
1.6
1.6
20
CH CLK
Clock transmission from
the changer; FLASH W
CLK
the changer; FLASH W
CLK
SCK 4.9
4.9
4.9
21
Vdd
Power supply
I
4.9
4.9
4.9
22
XM SI
DATA transmission to
XM; FLASH W SI
XM; FLASH W SI
S0
0
0
0
23
CD SI
CD DATA transmission
S0
24
CD SCK
CD Clock transmission
SCK
0
0.4
0
25
CONDENSOR Capacitor for power
supply
-
3.3
3.3
3.3
26
CDC SO
CD DATA transmission
SI
0
0
0
27
CDC STB
Changer stororb signal
input
input
INT
0
0
0
28
CD IN
DISC in detect
I
4.9
4.9
0.4
29
DECK V
CONT
CONT
DECK power supply
control output
control output
O
4.9
4.9
4.9
30
CD STB
CD frame sink
O
3.7
3.7
3.7
31
NC
No Connection
-
-
-
-
32
Avdd
Power supply of D/A
converter
converter
I
5.1
5.1
5.1
33
AVREF
Reference voltage for
D/A converter
D/A converter
I
5.1
5.1
5.1
34
AVGND
Reference GND for D/A
converter
converter
I
0
0
0
35
AVSS
Grand for A/D and D/A
converter
converter
I
0
0
0
36
SD
FM/AM signal meter
signal input
signal input
A/D
0.2
0
0.3
37
INIT A
Initializ A
A/D
0
0
0
38
INIT B
Initializ B
A/D
0
0
0
39
A IN
SPE.ANA A.IN
A/D
0
0
0
40
Vss
GND
I
0
0
0
41
CD MUTE
CD deck mute detection
I
0
0
5.1
42
NC
No Connection
-
-
-
-
43
NC
No Connection
-
-
-
-
44
NC
No Connection
-
-
-
-
45
CD SW1
CD disc in detection
I
-
-
-
46
CD SW2
CD disc in detection
I
-
-
-
47
MOD0
Operating mode input 0
I
5.1
5.1
5.1
48
MOD1
Operating mode input 1
I
5.1
5.1
5.1
49
MOD2
Operating mode input 2
I
0
0
0
Pin
No.
Port
Description
(I/O)
(V)
FM
AM
CD
50
H STANDBY
External standby input
I
5
5
5
51
DC DC CNT
DC/DC control for 60W
(CQ-C8401W)
(CQ-C8401W)
O
0
0
0
NC
No Connection
(CQ-C7401W)
(CQ-C7401W)
-
-
-
-
52
FP MOTOR1
Front open/close control
1
1
O
4.9
5
4.9
53
FP MOTOR2
Front open/close control
2
2
O
4.9
5
4.9
54
V CNT1
Panel driving voltage
control 1
control 1
O
0
0
5
55
V CNT2(NC)
No Connection
-
-
-
-
56
SA CLK
Control for Speana
acquisition
acquisition
O
5
5
4.9
57
EXT MUTE
TEL/NAVI MUTE input
I
5.3
5.2
5.2
58
AMP CONT
External AMP control
O
4.9
5
4.9
59
BZ-OUT
Buzzer output
PPG
0
0
0
60
ANT CONT
Motor antenna control
O
4.9
5
0
61
DIM1
Dimmer control output 1
O
0
0
0
62
DIM2
Dimmer control output 2
O
0
0
0
63
CDC REM
OUT
OUT
Remote control code
output to Changer
output to Changer
O
5
5
5
64
CDC SENS
CDC 1/2 detection
I
5.1
5.1
5.1
65
CDC 1/2
CDC 1/2 change output
O
0
0
0
66
NC
No Connection
-
-
-
-
67
M W UP
MAIN.WAKE.UP.REQ
input
input
I
5
4.9
5
68
NC
No Connection
-
-
-
-
69
NC
No Connection
-
-
-
-
70
NC
No Connection
-
-
-
-
71
NC
No Connection
-
-
-
-
72
MAIN CONT
MAIN power supply
control output
control output
O
4.9
4.9
4.9
73
INV CONT
INV power supply control
output
output
O
5
5
5
74
AF MUTE
Tr-MUTE control
O/I
5
5
5
75
RESET
Reset input
I
5
5
5
76
NC
No Connection
-
-
-
-
77
NC
No Connection
-
-
-
-
78
NC
GND
I
0
0
0
79
Vss
GND
I
0
0
0
80
X1
Crystal oscillator input
I
2
2
2
81
X2
Crystal oscillator output
O
2.5
2.5
2.5
82
Vdd
Power supply
I
5
5
5
83
P00
Pldaun port for writing
I
0
0
0
84
P01
Pull-up port for writing
I
5.1
5
5.1
85
OFFSET DET PWR-IC OFFSET
detection
I
0
0
0
86
STBY
PWR-IC STBY control
output
output
O
5
5
5
87
AMP MUTE
PWR-IC MUTE control
output
output
O
0
0
0
88
ILL SENS
External dimmer control
input
input
I
5
5
5
89
SUBM CNT
3.3V control for SUB
microcomputer
microcomputer
O
5
5
5
90
NC
No Connection
-
-
-
-
91
NC
No Connection
-
-
-
-
92
NC
No Connection
-
-
-
-
93
SUB W U
REQ
REQ
SUB.WAKE.UP.REQ
O
4.9
5
4.9
94
DISPM CNT
Power supply control
output of display 5V
output of display 5V
O/I
0
0
0
95
EJE ILL(NC)
No Connection
-
-
-
-
96
NC
No Connection
-
-
-
-
97
NC
No Connection
-
-
-
-
11 TERMINALS DESCRIPTION
13
CQ-C8401W / CQ-C7401W
Pin
No.
Port
Description
(I/O)
(V)
FM
AM
CD
98
S LED
Security LED control
output
output
O
0
0
5
99
PANEL IN
PANEL detect
I
5.2
5.2
5.2
100 EP CS(NC)
No Connection
-
-
-
-
11.2. Display Block
IC900 C2CBJH000095
Pin
No.
Port
Part Name & Description
I/O
(V)
1
A18
FLASH A17
O
1.5
2
A19
FLASH A18
O
1.7
3
A20
FLASH A19
O
1.3
4
NC
No Connection
-
-
5
NC
No Connection
-
-
6
NC
No Connection
-
-
7
A0
LCD driver data or command
distinction
distinction
O
1.3
8
A1
FLASH A0
O
0.3
9
VSS
Ground potential
-
0
10
A2
FLASH A1
O
0.4
11
A3
FLASH A2
O
0.4
12
A4
FLASH A3
O
0.4
13
A5
FLASH A4
O
1.3
14
A6
FLASH A5
O
0.4
15
A7
FLASH A6
O
0
16
A8
FLASH A7
O
1.3
17
A9
FLASH A8
O
0
18
A10
FLASH A9
O
0
19
A11
FLASH A10
O
1.5
20
A12
FLASH A11
O
1.7
21
VCC
Positive
power
supply
terminal
-
3.5
22
A13
FLASH A12
O
1.4
23
A14
FLASH A13
O
1.6
24
A15
FLASH A14
O
1.7
25
SUB SI UP SO
MAIN-u-com communication
data input and external flash
rewritting
data input and external flash
rewritting
-
0.5
26
SUB SO/UP SI
MAIN-u-com communication
data output and external
flash rewritting
data output and external
flash rewritting
O
1.8
27
UP CLK
External flash rewritting
switch
switch
I
3.5
28
NC
No Connection
-
-
29
FLASH RESET
FLASH reset control output
O
3.5
30
KS1
Key scan signal 1 output
I
0
31
NC
No Connection
-
-
32
NC
No Connection
-
-
33
AVCC
Positive power supply for A/D
converter
converter
-
3.5
34
AVRH
A/D converter standard
voltage input
voltage input
-
3.5
35
AVSS/AVRL
A/D converter ground
potential
potential
-
0
36
TH DETECT
Temperature detection input
I
1.3
37
KS2
Key scan signal 2 output
I
0
38
KS3
Key scan signal 3 output
I
0
39
NC
No Connection
-
-
40
VSS
Ground potential
-
0
41
KI5
Key return signal 5 input
I
0
42
KI4
Key return signal 4 input
I
0
43
KI3
Key return signal 3 input
I
0
44
KI2
Key return signal 2 input
I
0
45
NC
FLASH writing program
starter
starter
I
0
46
NC
FLASH writing program
starter
starter
I
3.5
47
MD0
Mode setting terminal
I
3.5
48
MD1
Mode setting terminal
I
3.5
49
MD2
Mode setting terminal
I
0
50
S W U REQ
SUB-u-com wake up request
INT
3.0
51
ROTARY.1
Rotary encoder signal 1(VOL
UP)
UP)
I
2.5
52
ROTARY.2
Rotary encoder signal 2 (VOL
DOWN)
DOWN)
I
2.5
14
CQ-C8401W / CQ-C7401W
Pin
No.
Port
Part Name & Description
I/O
(V)
53
KI1(SOURCE)
Key return signal 1
INT/I
0
54
REMO INT
Remote
control
signal
interference
INT
3.7
55
NC/WP/ACC
No Connection
O
0
56
NC/A21
No Connection
O
0
57
NC/A22
No Connection
O
0
58
FLASH CE
FLASH chip enable
O
3.4
59
LCD CS
LCD driver chip select
O
3.4
60
NC
No Connection
-
-
61
NC
No Connection
-
-
62
REMO 1
Remote control signal
I
3.7
63
NC
No Connection
-
-
64
VLCD CONT
VLCD 16V control
O
3.4
65
M W U REQ
MAIN-u-com wake up request
O
0
66
LED ON
P.LED control output
O
3.4
67
NC
No Connection
-
-
68
NC
No Connection
-
-
69
FLASH OE/ LCD
RD
RD
FLASH output enable and
LCD driver lead strobe
LCD driver lead strobe
O
3.4
70
LCD WR
LCD driver light strobe signal
O
3.4
71
FLASH WE
FLASH light enable signal
O
3.4
72
NC
No Connection
-
-
73
LCD RESET
LCD driver reset control
O
3.4
74
FLASH RY/BY
FLASH ready/busy input
I
3.4
75
/RST
System reset signal input
I
3.5
76
NC
No Connection
-
-
77
X1A
No Connection
-
-
78
X0A
Not used
I
0
79
VSS
Ground
-
0
80
X0
MAIN system clock input
(12.5MHz)
(12.5MHz)
I
1.3
81
X1
MAIN system clock output
(12.5MHz)
(12.5MHz)
O
1.5
82
VCC
Positive power supply
-
3.5
83
D0
FLASH D0/LCD D0
I
0.9
84
D1
FLASH D1/LCD D1
I
0.9
85
D2
FLASH D2/LCD D2
I
1.1
86
D3
FLASH D3/LCD D3
I
0.9
87
D4
FLASH D4/LCD D4
I
1.0
88
D5
FLASH D5/LCD D5
I
1.1
89
D6
FLASH D6/LCD D6
I
1.1
90
D7
FLASH D7/LCD D7
I
0.8
91
D8
FLASH D8
I/O
0.9
92
D9
FLASH D9
I/O
0.9
93
D10
FLASH D10
I/O
0.9
94
D11
FLASH D11
I/O
0.8
95
D12
FLASH D12
I/O
0.8
96
D13
FLASH D13
I/O
0.7
97
D14
FLASH D14
I/O
0.7
98
D15
FLASH D15
I/O
0.7
99
A16
FLASH A15
O
3.0
100 A17
FLASH A16
O
1.7
11.3. CD Servo Block
IC401 : YESAM275
Pin
No.
Port
Descriptions
I/O
(V)
1
CVSS1
GND
-
0
2
A22
TP407
-
0
3
CVSS2
GND
-
0
4
DVDD1
I/O system (3.3V) power supply
-
3.1
5
A10
Address bus of FLASH ROM
O
3.1
6
-
-
-
-
7
A11
Address bus of FLASH ROM
O
0
8
A12
O
3.1
9
A13
O
3.1
10
A14
O
3.1
11
A15
O
0
12
/CVDD1
CORE CPU system (1.6V) power
supply
supply
-
1.6
13
-
-
-
-
14
DVSS1
GND
-
0
15
CVSS3
GND
-
0
16
/CVDD2
I/O system (3.3V) power supply
-
1.6
17
-
-
-
-
18
-
-
-
-
19
READY
-
-
3.1
20
/PS
FLASH ROM selection signal
O
3.1
21
-
-
-
-
22
-
-
-
-
23
R/W
Lead/light signal to FLASH ROM
O
3.1
24
/MSTRB
Memory access signal
O
3.1
25
-
-
-
-
26
/MSC
-
-
3.1
27
MUTE
Mute signal output (H:Mute on)
O
0
28
-
-
-
-
29
-
-
-
-
30
/HOLD
-
-
3.1
31
BIO
SUBO input
I
0
32
MP/MC
Operation mode setting (external pull-
up)
up)
I
3.1
33
DVDD2
I/O system (3.3V) power supply
-
3.1
34
CVSS4
GND
-
0
35
BD R1
GND
I
0
36
-
-
-
-
37
CVSS5
GND
-
0
38
-
-
-
-
39
-
-
-
-
40
DVSS2
GND
-
0
41
CLK C M AUDIO bit clock input
I
1.6
42
SCK
Clock input
I
3.0
43
LRCK
C
M
AUDIO L/R identifying signal input
I
1.6
44
CDFS
Serial frame sink signal input
I
2.4
45
DATA
CM
CM
AUDIO serial data input
I
1.6
46
-
-
-
-
47
SI
Serial data input
I
0
48
CLK M C AUDIO bit clock output
O
1.6
49
SCK
Clock input
I
3.0
50
CVSS6
GND
-
0
51
-
-
-
-
52
CVDD3
CORE CPU system (1.6V) power
supply
supply
-
1.6
53
LRCK
M
C
AUDIO L/R identifying signal output
O
1.5
54
CDFS
Serial frame sink signal input
I
2.4
55
-
-
-
-
56
DVDD3
I/O system (3.3V) power supply
-
3.1
57
DVSS3
GND
-
0
58
REST
SW
SW
Mechanics deck REST SW input
I
3.1
15
CQ-C8401W / CQ-C7401W
Pin
No.
Port
Descriptions
I/O
(V)
59
DATA
M
C
AUDIO serial data output
O
1.6
60
SO
Serial data output
O
1.1
61
-
-
-
-
62
-
-
-
-
63
/NMI
-
-
3.1
64
/INT0
-
-
3.1
65
/INT1
-
-
3.1
66
BLKCK
Subcode block clock pulse input
I
0
67
/INT3
-
-
3.1
68
CV DD4
CORE CPU system (1.6V) power
supply
supply
-
1.6
69
SW1
Mechanics deck SW1 input
I
0
70
CVSS7
GND
-
0
71
MCLK
Clock output (To Servo DSP)
O
3.1
72
DVSS4
GND
-
0
73
MLD
Command load signal output (To
Servo DSP)
Servo DSP)
I
3.1
74
MDATA
Command data output (To Servo
DSP)
DSP)
O
3.1
75
DVDD4
I/O system (3.3V) power supply
-
3.1
76
DVSS5
GND
-
0
77
CLK MD1 Clock mode setting (L fixation)
I
0
78
CLK MD2 Clock mode setting (H fixation)
I
3.1
79
CLK MD3 Clock mode setting (L fixation)
I
0
80
-
-
-
-
81
SW2
Mechanics deck SW2 input
I
0.2
82
-
-
-
-
83
EMU0
-
-
3.1
84
EMU/OF
F
F
-
-
3.1
85
TDO
-
-
0
86
TDI
-
-
3.1
87
/TRST
-
-
0
88
TCK
-
-
3.1
89
TMS
-
-
3.1
90
CVSS8
GND
-
0
91
CVDD5
CORE CPU system (1.6V) power
supply
supply
-
1.6
92
HPIENA
GND
I
0
93
DVSS6
GND
-
0
94
-
-
-
-
95
CLKENA Oscillation output Cainabl signal
O
0
96
X1
Crystal Connection
O
0.7
97
X2/CLKIN Crystal Connection
I
1.0
98
RS
Reset signal input
I
3.1
99
D0
Data base of FLASH ROM
I/O
0
100
D1
I/O
0
101
D2
I/O
0
102
D3
I/O
0
103
D4
I/O
0
104
D5
I/O
0
105
A16
Address bus of FLASH ROM
O
3.1
106
DVSS7
GND
-
0
107
A17
Address bus of FLASH ROM
O
3.1
108
A18
Address bus of FLASH ROM
O
0
109
A19
TP419
O
0
110
A20
TP416
O
0
111
CVSS9
GND
-
0
112
DVDD5
I/O system (3.3V) power supply
-
3.1
113
D6
Data bus of FLASH ROM
I/O
0
114
D7
I/O
0
115
D8
I/O
0
116
D9
I/O
0
117
D10
I/O
0
118
D11
Data bus of FLASH ROM
I/O
0
119
D12
I/O
0
Pin
No.
Port
Descriptions
I/O
(V)
120
STAT
Status signal input
I
3.0
121
D13
Data path of FLASH ROM
I/O
3.1
122
D14
I/O
0
123
D15
I/O
0
124
-
-
-
-
125
CVDD6
CORE CPU system (1.6V) power
supply
supply
-
1.6
126
CVSS10
GND
-
0
127
-
-
-
-
128
DVSS8
I/O system (3.3V) power supply
-
0
129
-
-
-
-
130
DVDD6
I/O system (3.3V) power supply
-
3.1
131
A0
Address bus of FLASH ROM
O
3.1
132
A1
O
0
133
A2
O
0
134
A3
O
0
135
/RST
Reset signal output(To Servo DSP)
O
3.1
136
A4
Address bus of FLASH ROM
O
0
137
A5
O
3.1
138
A6
O
3.1
139
A7
O
0
140
A8
O
3.1
141
A9
O
3.1
142
CVDD7
CORE CPU system (1.6V) power
supply
supply
-
1.6
143
A12
TP406
-
0
144
DVSS9
GND
-
0
16
CQ-C8401W / CQ-C7401W
Click on the first or last page to see other CQ-C8401W / CQ-C7401W service manuals if exist.