Panasonic CQ-EH8480K Service Manual ▷ View online
5 BLOCK DIAGRAM
5.1. Main-1/Connector/Display Block
5
HONDA / CQ-EH8480K
5.2. Main-2/ADLC Block
6
HONDA / CQ-EH8480K
6.1. Main Block
IC601 : C2CBJG000535
Pin
No.
Port
Descriptions
I/O
FM
(V)
AM
(V)
CD
(V)
1
+B-DET
BAT detection Input
H: +B ON L:+B OFF
H: +B ON L:+B OFF
I
5.1
5.1
5.2
2
TEL-DET Telephone mute detection
H: Interfering L: IDLE
I
-
-
-
3
VDD-
DET
DET
VDD operation voltage (4.5V)
detection input
H: VDD ON L: VDD OFF
detection input
H: VDD ON L: VDD OFF
I
5.1
5.2
5.2
4
AUX-
DET
DET
AUX terminal connection
detection
H: Unconnected L: Connecting
detection
H: Unconnected L: Connecting
I
5.1
5.1
5.2
5
VOL.A
Main volume signal
I
0
5.2
5.3
6
VOL.B
Main volume signal
I
5.2
5.2
5.2
7
AM-
LOUD
LOUD
Changes the loudness control
settings while in AM mode
settings while in AM mode
I
0
0
0
8
AUX-
MUTE
MUTE
AUX audio line mute control
O
0
0
0
9
KEY-
REQ
REQ
Key data request
I
0
0
0
10 POWER-
SW
Power switch input
H: Open button
L: Button pressed.
H: Open button
L: Button pressed.
I
5.2
5.2
5.2
11 RESET
Reset input
-
5.2
5.2
5.3
12 XT2
Crystal oscillator terminal
-
1.9
2.0
2.0
13 XT1
Crystal oscillator terminal
-
1.5
1.5
1.5
14 GND
Ground
-
0
0
0
15 X2
Crystal oscillator terminal
-
1.9
1.9
1.9
16 X1
Crystal oscillator terminal
-
1.6
1.6
1.6
17 REGOFF Connecting to ground
-
0
0
0
18 REGC
Bypass capacitor terminal
-
3.7
3.7
3.7
19 VDD
+5V power supply
-
5.2
5.2
5.2
20 LCD1-
CE
LCD1 chip enable
O
0
0
0
21 LCD1-
DATA
LCD1 data
I/O
5.2
5.2
5.2
22 LCD1-
CLK
LCD1 data shift clock
O
0
0
0
23 LCD1-
RST
LCD1 reset
H: Normal L: Reset
H: Normal L: Reset
O
5.2
5.2
5.2
24 LCD-
OFF
LCD1 off signal
H: LCD display L: LCD off
H: LCD display L: LCD off
O
5.2
5.2
5.2
25 LCD2-
DO
LCD2 data
O
5.2
5.2
5.2
26 LCD2-
CLK
LCD2 data shift clock
O
0
0
0
27 LCD2-
CE
LCD2 chip enable
O
0
0
0
28 LCD2-DI LCD2 data
I
5.2
5.2
5.2
29 SEC-
LED
Security led on/off
H: Led on L: Led off
H: Led on L: Led off
O
0
0
0
30 ADLC-B
E-VOL Gain settings
O
-
-
-
31 ADLC-A
E-VOL Gain settings
O
-
-
-
32 EEP-DI
Security ROM data
I
1.0
1.4
1.2
33 EEP-
CLK
Security ROM data shift clock
O
0
0
0
34 EEP-DO Security ROM data
O
0
0
0
35 EEP-CS Security ROM chip select
O
0
0
0
36 SIYOU7
Specification setting
I
0
0
0
37 SIYOU6
Specification setting
I
0
0
0
38 SIYOU5
Specification setting
I
0
0
0
39 SIYOU4
Specification setting
I
0
0
0
40 GND
Ground
-
0
0
0
41 VDD
+5 power supply
-
5.2
5.2
5.2
Pin
No.
Port
Descriptions
I/O
FM
(V)
AM
(V)
CD
(V)
42 SPA-SEL Spectrum analyzer IC chip
select
H: Spectrum analysis
L: Spectrum analysis (low)
H: Spectrum analysis
L: Spectrum analysis (low)
O
5.2
0
5.3
43 SPA-A
Spectrum analyzer output
select
select
O
5.2
0
2.7
44 SPA-B
Spectrum analyzer output
select
select
O
0
0
2.7
45 SPA-C
Spectrum analyzer output
select
select
O
5.2
0
2.7
46 AMP-
STB
Power amp. Stand-by H: Amp
on L: Amp off
on L: Amp off
O
5.2
5.2
5.2
47 AMP-
MUTE
Power amp mute
H: Mute on L: Mute off
H: Mute on L: Mute off
O
0
0
0
48 MUTE
Mute control
H: Power on L: Power off
H: Power on L: Power off
O
0
0
0
49 MUTE-
FL
Front left mute
H: Mute off L: Mute on
H: Mute off L: Mute on
O
5.2
5.2
5.2
50 MUTE-
FR
Front right mute
H: Mute off L: Mute on
H: Mute off L: Mute on
O
5.2
5.2
5.2
51 MUTE-
REAR
Rear mute
H: Mute off L: Mute on
H: Mute off L: Mute on
O
5.2
5.2
5.2
52 (NAVI-
MUTE-L)
Left CH navi audio
interference switch
H: Normal audio
L: Navi audio output
interference switch
H: Normal audio
L: Navi audio output
O
-
-
-
53 (NAVI-
MUTE-R)
Right CH navi audio
interference switch
H: Normal audio
L: Navi audio output
interference switch
H: Normal audio
L: Navi audio output
O
-
-
-
54 EVOL-
DATA
Electronic volume cont. data
O
0
0
0
55 EVOL-
CLK
Electronic volume cont. clock
O
0
0
0
56 EVOL-
STB
Electronic volume cont. strobe
H: sending data L: other
H: sending data L: other
O
0
0
0
57 ST-IND
FM stereo detection
H: stereo L: monaural
H: stereo L: monaural
I
0.5
2.0
0
58 PLL-DI
PLL data
I
5.2
5.2
5.2
59 PLL-CLK PLL data shift clock
O
0
0
0
60 PLL-DO
PLL data
O
0
0
0
61 PLL-CE
PLL chip enable
O
0
0
0
62 NC
No connection
-
-
-
-
63 IDCH-
RST
IDCH reset H: normal L: reset
O
5.0
5.1
5.1
64 IDCH-
STOP
IDCH controller enable
H: Cancels the stop mode
L: Stops
H: Cancels the stop mode
L: Stops
O
5.1
5.1
5.1
65 IDCH-
CLK
IDCH data shift clock
O
5.1
5.1
5.1
66 IDCH-SI IDCH data
I
0
0
2.4
67 IDCH-SO IDCH data
O
5.1
5.1
3.7
68 ACC-
CONT
ACC power control
H: power on L: power off
H: power on L: power off
O
5.1
5.1
5.2
69 P-CONT System power control
H: power on L: power off
O
5.1
5.1
5.2
70 SW+B
SW +B line control
H: power on L: power off
H: power on L: power off
O
5.1
5.1
5.1
71 LCD-
PWM
LCD dimmer control
O
5.1
5.1
5.1
72 NC
(PWM1)
No connection
-
-
-
-
73 GND
(TEST)
Ground pull down
-
0
0
0
74 REMOT
E-SW
Handle remote controller
analog input
analog input
I
5.2
5.2
5.2
75 VSM
Phase diff. level detection
I
1.6
1.7
1.0
76 SPA-IN
Spectrum analyzer data
I
0.5
0
0.5
77 MIC-IN
Not used
I
-
-
-
6 TERMINALS DESCRIPTION
7
HONDA / CQ-EH8480K
Pin
No.
Port
Descriptions
I/O
FM
(V)
AM
(V)
CD
(V)
78 SIYOU4-
A
Specification setting
I
5.1
5.2
5.2
79 SIYOU5-
A
Specification setting
I
0
0
0
80 SIYOU6-
A
Specification setting
I
0
0
0
81 ILL-IN
ILL detection
H: ILL on L: ILL off
H: ILL on L: ILL off
I
0
0
0
82 AVDD
+5V power supply
-
5.2
5.2
5.2
83 AVREF1 Analog reference voltage
-
5.2
5.2
5.2
84 AVSS
Ground
-
0
0
0
85 (IE-BUS-
RX)
IE-BUS data
I
-
-
-
86 (IE-BUS-
TX)
IE-BUS data
O
-
-
-
87 NC
No connection
I
-
-
-
88 REMO-
DATA
Remote controller data
I
5.1
5.1
5.2
89 ILL-
DET(ILL-
)
)
ILL-detection
I
0
0
0
90 SPEED
+5 pull-up
I
-
-
-
91 GA-
INPUT
+5 pull-up
I
-
-
-
92 ACC-
DET
ACC level detection
H: ACC on L: ACC off
H: ACC on L: ACC off
I
5.1
5.2
5.2
93 EJECT-
SW
Eject switch input
H: All buttons open
L: Some buttons pressed
H: All buttons open
L: Some buttons pressed
I
5.1
5.2
5.2
94 (MD-SI)
Condition change for speed
notice H:50msL:20ms
notice H:50msL:20ms
I
-
-
-
95 FLASH-
RX
Usually at low output
O
-
-
-
96 FLASH-
TX
Usually at low output
O
-
-
-
97 (MD-
CLK)
ADLC on/off
H: ADLC on L: ADLC off
H: ADLC on L: ADLC off
O
-
-
-
98 (MD-SO) Mute control when ADLC goes
on & off
H: mute on L: mute off
H: mute on L: mute off
O
-
-
-
99 BEEP
Beep output
O
0
0
0
100 (MD-ON) Sys-acc control
H: acc on L: acc off
O
-
-
-
Note : Voltage measuerments are with respect to ground, with
a voltmeter (internal resistance : 10M ohms).
a voltmeter (internal resistance : 10M ohms).
6.2. Display Block
IC903 : YEAMPD32B015
Pin No.
Name
Description
I / O Vol.(V)
1
IDCH GREEN
LED
LED
-
-
5.2
2
IDCH RED LED
-
-
5.2
3,4
NC
No Connection
-
-
5
VSS
(Connecting to Ground)
-
0
6
VLC5
LCD Control Voltage 5
I
0
7
VLC4
LCD Control Voltage 4
I
2.2
8
VLC3
LCD Control Voltage 3
I
4.2
9
VLC2
LCD Control Voltage 2
I
4.2
10
VLC1
LCD Control Voltage 1
I
6.2
11
VLC0
LCD Drive Voltage
I
8.2
12
VDD
(Connecting to +5V)
-
5.2
13
SYNC
Syncronize Input
-
5.2
14
LCD OFF
LCD Control (LCD Off)
I
4.7
15
RESET
Reset
I
5.2
16
KEY REQ
Key Request Output
O
0
17
SCK
Shift Control Clock Input
I
0
18
DATA
Data In/Out
I/O
5.2
19
STB
Strobe Input
I
0
20
OSC IN
Oscillator Input
I
2.7
21
OSC OUT
Oscillator Output
O
3.0
22 - 25 KEY1 - KEY4
Key Scan Input
I
1.7
26 - 31 SEG1A/KS1 -
SEG6A/KS6
Segment/Key Scan Output
O
4.2
32 - 90 SEG7A -
SEG65A
Segment Output
O
4.2
91,92
COM9 COM8
(NC)
(NC)
No Connection
-
-
93 -
100
COM7A -
COM0A
COM0A
Common 7A - 0A
O
3.5
IC904 : C0HBA0000093
Pin No.
Port
Descriptions
I/O
(V)
1-73
SEG1B-
SEG73B
SEG73B
LCD segment
O
3.6
74-77
COM4-COM1
LCD common
O
3.6
78-83
-
No Connection
-
-
84-88
KI1-KI5
Ground
-
0
89
VDD
Power supply +5V
-
5.2
90
VLCD
LCD drive reference
voltage(VDD)
voltage(VDD)
I
7.1
91
VLCD1
LCD drive reference voltage
1
1
4.8
92
VLCD2
LCD drive reference voltage
2
2
2.5
93
VSS
Ground
-
0
94
TEST
Ground
-
0
95
OSC
CR Oshiretar
I
0
96
RES
-
-
4.8
97
DO
LCD data
O
5.2
98
CE
LCD chip enable
I
0
99
CL
LCD clock
I
0
100
DI
LCD data
I
4.0
8
HONDA / CQ-EH8480K
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