Read Panasonic CQ-C7703N / CQ-C7303N Service Manual online
10.1. Main Block [CQ-C7703N]
IC601 : C2CBKG000037
Pin
No.
Port
Description
I/O
(V)
FM AM CD
1
PANEL
OPEN
OPEN
Panel open detection
I
0
5.2
5.2
2
PANEL
CLOSE
CLOSE
Panel close detection
I
0
0
5.2
3
SUBM CNT
3.3V power control for
Display
Display
O
5.0
-
-
4
BATT
Battery power check
I
4.8
5.0
5.0
5
ACC
Acc. power check
I
4.8
5.0
5.0
6
SDA
Serial data for electronic
volume
volume
I/O
4.9
4.9
4.9
7
SCLK
Serial clock for electronic
volume
volume
O
4.9
4.9
4.9
8
CD MUTE
Signal mute from CD deck
I
5.0
5.0
5.0
9
Vss
GND
-
0
0
0
10 ST
FM stereo detection
I
5.1
5.2
5.2
11 PLL DI
Serial data to PLL
O
0.6
0
0
12 PLL DO
Serial data from PLL
I
5.2
5.2
5.2
13 PLL CLK
Serial clock for PLL
O
4.9
4.9
4.9
14 PLL CE
Chip enable for PLL
O
0
0
0
15 CD RESET
Reset for CD deck
O
4.9
4.9
4.9
16 SUB SI
Serial data to Display CPU
O
0.6
0.6
0.8
17 CD IN
Disc-in detection
I
5.0
5.0
5.0
18 SUB SO
Serial data from Display
CPU
CPU
I
4.4
4.4
4.4
19 CH DATA
XM SO/UP SO Serial data
from Changer
I
1.6
1.6
1.6
20 CH CLK
Serial clock for Changer or
Flash writer
Flash writer
I
4.9
4.9
4.9
21 Vdd
+5V power supply
-
4.9
4.9
4.9
22 UP SI
Serial data to Satellite or
Flash writer
Flash writer
O
0
0
0
23 CD SI
Serial data to CD deck
O
0
0
0
24 CD SCLK
Serial clock for CD deck
I/O
0
0.4
0
25 CONDENSO
R
Capacitor connection for
power
power
-
3.3
3.3
3.3
26 CD SO
Serial data from CD deck
I
0
0
0
27 CH STB
Strobe from Changer
I
0
0
0
28 CH REM
OUT
Remote control codes to
Changer
Changer
O
4.9
4.9
0.4
29 DECK V
CONT
Power control for CD deck
O
4.9
4.9
4.9
30 REMO INT
Interrupt for remote control
I
3.7
3.7
3.7
31 CD FS
Frame sync. for CD deck
O
-
-
-
32 Avdd
+5V power supply
-
5.1
5.1
5.1
33 AVREF
+5V power supply
-
5.1
5.1
5.1
34 AVGND
GND
-
0
0
0
35 AVSS
GND
-
0
0
0
36 SD
FM/AM signal level meter
I
0.2
0
0.3
37 INIT A
Model setting A by voltage
level
level
I
0
0
0
38 INIT B
Model setting B by voltage
level
level
I
0
0
0
39 A IN
Spectrum analyzer data
I
0
0
0
40 Vss
GND
-
0
0
0
41 SYS ID1
Hub connection device
detection ID 1
detection ID 1
I
0
0
0
42 SYS ID2
Hub connection device
detection ID 2
detection ID 2
I
5.2
5.2
5.2
43 HUB EVENT Bluetooth incoming
detection
I
5.2
5.2
5.2
44 HUB CNT
Request of hub
connection check
connection check
O
0
0
0
45 CD SW1
Disc detection switch 1
I
0
0
0
46 CD SW2
Disc detection switch 2
I
0
0
0
Pin
No.
Port
Description
I/O
(V)
FM AM CD
47 MOD0
Operating mode control 0
from Flash writer
from Flash writer
I
5.1
5.1
5.1
48 MOD1
Operating mode control 1:
pulled up to H
pulled up to H
-
5.1
5.1
5.1
49 MOD2
Operating mode control 2
from Flash writer
from Flash writer
I
0
0
0
50 H STANDBY Standby control from
external
I
5.0
5.0
5.0
51 DCDC CONT Not connected
-
-
-
-
52 FP MOTOR1 Open/Close of Front panel
1
O
4.9
5.0
4.9
53 FP MOTOR2 Open/Close of Front panel
2
O
4.9
5.0
4.9
54 V CONT1
Reference voltage control
for motor driver
for motor driver
O
0
0
5.0
55 REMO 1
Remote control data
I
5.0
5.0
5.0
56 SA CLK
Spectrum analyzer clock
O
5.0
5.0
4.9
57 EXT MUTE
Pulled up to H
I
5.3
5.2
5.2
58 AMP CONT
Power control for external
Amplifier
Amplifier
O
4.9
5.0
4.9
59 BZ OUT
Buzzer signal
O
0
0
0
60 NC
Not connected
-
-
-
-
61 WOW
MODE1
SRS WOW mode 1
(C8403U only)
(C8403U only)
O
0
0
0
62 WOW
MODE2
SRS WOW mode 2
(C8403U only)
(C8403U only)
O
0
0
0
63 WOW
MODE3
SRS WOW mode 3
(C8403U only)
(C8403U only)
O
0
0
0
64 DIM1
Not connected
-
-
-
-
65 DIM2
Not connected
-
-
-
-
66 MAIN CNT2
Power control for Hub
O
5.0
5.0
5.0
67 SRC KEY
SOURCE key detection
I
5.0
4.9
5.0
68 PANEL IN
Panel attachment
detection
detection
I
-
-
-
69 RDS CLK
RDS clock input
INT
2.6
0
2.6
70 NC
Not connected
-
-
-
-
71 RDS DATA
RDS data input
I
2.6
0.2
2.9
72 MAIN CONT Main power control
O
4.9
4.9
4.9
73 INV CONT
Dimmer power control
O
5.0
5.0
5.0
74 AF MUTE
Audio mute
O
5.0
5.0
5.0
75 RESET
Reset
I
5.0
5.0
5.0
76 FOCUS ELV Focus elevation for SRS
WOW (C8403U only)
O
-
-
-
77 X1A
Oscillator clock
O
2.1
2.1
2.1
78 X0A
Oscillator clock
I
1.6
1.6
1.6
79 Vss
GND
-
0
0
0
80 X1
Crystal oscillator clock
I
2.0
2.0
2.0
81 X2
Crystal oscillator clock
O
2.5
2.5
2.5
82 Vdd
+5V power supply
-
5.0
5.0
5.0
83 P00
Pulled down to L
-
0
0
0
84 P01
Pulled up to H
-
5.1
5.0
5.1
85 OFFSET
DET
Audio clipping level
detection from Power
amp.
detection from Power
amp.
I
0
0
0
86 STBY
Standby for Power amp.
O
5.0
5.0
5.0
87 AMP MUTE
Mute for Power amp.
O
0
0
0
88 ILL SENS
Pulled up to H
-
5.0
5.0
5.0
89 HB AM
H-IC analog mode select
O
5.2
5.2
0
90 EP DO
EPROM comuni. data
input
input
O/I
0
0
0
91 EP DI (NC)
Not connected
-
-
-
-
92 EP SK (NC)
Not connected
-
-
-
-
93 SUB RESET Reset for display CPU
O
4.9
5.0
4.9
94 DISPM
CONT
5V power control for
Display
Display
O
0
0
0
95 NC
Not connected
-
-
-
-
10 TERMINALS DESCRIPTION
9
CQ-C7703N / CQ-C7303N
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