Panasonic CQ-EH8160AK Service Manual ▷ View online
6 BLOCK DIAGRAM (Main, Display, Tape Block)
5
HONDA / CQ-EH8160AK
7 BLOCK DIAGRAM (CD Servo Block)
6
HONDA / CQ-EH8160AK
8.1. Main Block
IC601 : C2CBHG000077
Pin
No.
Port
Description
I/O
(V)
1
BEEP
Beep output
O
0
2
IDC-ST/SP
CD.C start/stop
O
4.9
3
EVOL CLK
Electronic volume clock
O
0
4
EVOL DATA Electronic volume data
O
0
5
SEC-LED
Security LED on/off
O
4.9
6
VOL A
Rotary encoder data
I
0.5
7
VOL B
Rotary encoder data
I
0.5
8
LCD-CLK
Shift clock for LCD data
O
0
9
LCD-DI
LCD data
O
5.0
10
LCD-DO
LCD data
I
0
11
RESET
Reset input
I
4.9
12
XT2
Crystal oscillator terminal
-
2.4
13
XT1
Crystal oscillator terminal
-
0.7
14
VSS
Ground
-
0
15
X2
Crystal oscillator terminal
-
2.3
16
X1
Crystal oscillator terminal
-
1.8
17
REGOFF
(Connecting to VDD)
-
4.9
18
REGC
(Connecting to VDD)
-
4.9
19
VDD
+5V power supply
-
4.9
20
VOL C
Rotary encoder data
I
4.8
21
VOL D
Rotary encoder data
I
0.5
22
LCD-CE
LCD driver enable
O
0
23
BOSE
(Connecting to ground)
-
0
24
SEC-CS
Security ROM chip select
O
0
25
SEC-CLK
Data shift clock for security ROM
O
0
26
SEC-DI
Security data
I
0
27
SEC-DO
Security data
O
0
28
SET-SEC1
(Ground pull-down)
-
0
29
SET-TIME2
(Vdd pull-up)
-
4.9
30
SET-TIME
(Vdd pull-up)
-
4.9
31
P.CONT
COM8V power switch
O
4.8
32
ACC CNT
ACC 5V power switch
O
4.9
33
STB
Power amp. Stand-by
O
4.9
34
LCD ON
LCD illumi. on/off
O
4.9
35
TUNER +B
Motor antenna power
O
4.9
36
PLL-CE
PLL chip select
O
0
37
PLL-DO
PLL data
O
0
38
PLL-CLK
Shift clock for PLL data
O
0
39
PLL-DI
PLL data
I
5.0
40
VSS
Ground
-
0
41
VDD
+5V power supply
-
4.9
42
AREA
(Ground pull-down)
-
0
43
ST-IND
FM stereo detection
I
0.3
44
CA.PON
Tape power control
O
4.9
45
CM.PON
Tape power control
O
4.9
46
M2
Main motor control
O
0
47
M1A
Loading motor control
O
0
48
M1B
Loading motor control
O
0
49
T.IN
Tape-in detection
I
0
50
MSM
MS gain contrl
O
4.9
51
A/B
Tape side detection
I
0
52
M2F
Main motor control
O
0
53
EQ(MTL)
Metal tape mode selection
O
4.9
54
F/R
Tape head change
O
0
55
DOLBY
Dolby NR on/off
O
4.9
56
T.LOAD
Tape loading detection
I
0
57
MS(PL/FF)
MS mode selection
O
0
58
MS
MS detection
I
0
59
REMO3/4
(Ground pull-down)
-
0
60
H.BUSOUT
Not used
-
-
61
NAVI-IN
(Vdd pull-up)
-
4.8
62
NC
No connection
-
-
63
NC
No connection
-
-
64
NAVI-MUTE Not used
-
-
65
BIT1
Tape mode switch
I
4.6
66
END.A
Tape end signal
I
1.5
67
END.B
Tape end signal
I
2.4
68
BIT2
Tape mode switch
I
4.6
69
EQ
Metal/Normal switchl
I
0
70
BIT3
Tape mode switch
I
0
71
NC
No connection
-
-
72
NC
No connection
-
-
73
IC/VPP
(Connecting to ground)
-
0
74
REMO
Remote control signal
O
5.0
75
SW.A
Audio signal switch
O
0
76
SW.B
Audio signal switch
O
0
77
MUTE
Not used
-
-
78
NC
No connection
-
-
79
NC
No connection
-
-
80
VSM
Phase diff. level detection
I
0.6
81
AMP MUTE
Power amp mute
O
0
82
AVDD
+5V power supply
-
4.9
83
AVREF1
Analog reference voltage
I
5.0
84
AVSS
Ground
-
0
85
NC
(Connecting to ground)
-
0
86
NC
No connection
-
-
87
ACC-DET
ACC level detection
I
4.5
88
TAPE EJ
Tape eject SW
I
4.6
89
H.BUS.IN
Not used
-
4.8
90
GAIN
(+5V pull-up)
-
4.8
91
IDCEJECT
CD disc eject SW
I
4.7
92
BAT-DET
Battery level detection
I
4.5
93
EJ.INH
Tape/Disc eject SW
I
4.4
94
IDC-SI
CD.C serial data
O
4.0
95
RXO
Not used
-
0
96
TXO
Not used
-
4.9
97
IDC-CLK
Shift clock for CD.C data
O
4.9
98
IDC-SO
CD.C data
O
1.2
99
CD-RESET
CD.C reset
O
4.9
100
CDON
CD.C controller enable
O
4.9
Note :
Voltage measuerments are with respect to ground, with a
voltmeter (Internal resistance : 10M ohms.)
voltmeter (Internal resistance : 10M ohms.)
8.2. Display Block
IC901 : YEAMLC75853
Pin
No.
Port
Description
I/O
(V)
1, 2 S1, 2
Disc LED on/off
O
0
3
S3
Not used
-
-
4-40 S4-40
LCD segment data
O
2.5
41-43 COM1-3
LCD common
O
2.5
44
S41
LCD segment data
O
2.5
45-49 KS2-6
Key strobe
O
0.9
50-53 KI1-4
Key data
I
0
54
KI5
(Connecting to ground)
-
0
55
TEST
(Connecting to ground)
-
0
56
VDD
+5V power supply
-
5.1
57
VDD1
LCD angle
-
3.3
58
VDD2
LCD angle
-
1.7
59
VSS
Ground
-
0
60
OSC
Oscillator terminal
-
3.9
8 TERMINALS DESCRIPTION
7
HONDA / CQ-EH8160AK
61
DO
Key data output
O
4.1
62
CE
LCD driver chip enable
I
0
63
CL
Shift clock for LCD data
I
0
64
DI
LCD data input
I
0
8.3. CD Servo Block
IC201 : MN662783RPW
Pin
No.
Port
Description
I/O
(V)
1
VDD
+5V power supply
-
5.0
2
D0
D-RAM data
I/O
2.3
3
D1
D-RAM data
I/O
1.8
4
/WE
D-RAM data write
O
4.9
5
/RAS
D-RAM row address strobe
O
3.4
6
D2
D-RAM data
I/O
0.8
7
D3
D-RAM data
I/O
0
8
/CAS0
D-RAM columun address strobe
O
3.9
9
/CAS1
D-RAM columun address strobe
O
0
10
A8
D-RAM address
O
0.6
11
A7
D-RAM address
O
1.1
12
A6
D-RAM address
O
0.7
13
A5
D-RAM address
O
0
14
A4
D-RAM address
O
1.1
15
A9
D-RAM address
O
0.4
16
A0
D-RAM address
O
1.0
17
A1
D-RAM address
O
1.0
18
A2
D-RAM address
O
1.0
19
A3
D-RAM address
O
0
20
VSS2
Ground
-
0
21
VDD2
+5V power supply
-
5.0
22,23 -
Not used
-
-
24
TVD
Traverse motor control
O
2.5
25
PC
Not used
-
-
26
ECS
Spindle motor control
O
2.4
27
TRD
Tracking coil drive
O
2.5
28
FOD
Focus coil drive
O
2.4
29
FBAL
Focus balance
O
1.9
30
TBAL
Tracking balance
O
3.0
31
VREF
Reference voltage
I
2.5
32
FE
Focus error
I
2.5
33
TE
Tracking error
I
2.5
34
RFENV
RF envelope
I
2.5
35
OFT
Off track signal
I
0
36
/RFDET
RF detecting signal
I
0
37
BDO
Drop-out signal
I
0
38
LDON
Laser on signal
O
4.5
39
ARF
RF signal
I
2.5
40
IREF
Reference current input
I
1.2
41
DRF
Biase for DSL
I
2.4
42
DSLF
Loop filter for DSL
I/O
2.5
43
SDLF2
Loop filter for DSL
I/O
2.2
44
PLLF
Loop filter for PLL
I/O
1.4
45
VCOF
Not used
-
-
46
AVDD2
+5V power supply
-
5.0
47
AVSS2
Ground
-
0
48
OUTL
L channel output
O
2.3
49
AVSS1
Ground
-
0
50
OUTR
R channel output
O
2.3
51
AVDD1
+5V power supply
-
4.7
52-54 -
(Connecting to ground)
-
0
55
FLAG
Flag output
O
0
56
FCLK
Frame clock
O
0
57-59 -
Not used
-
-
60
TX
Not used
-
-
61
MCLK
Clock for I/F command
I
1.0
62
MDATA
Data for I/F command
I
3.1
63
MLD
I/F command load
I
5.0
64
BLKCK
Subcode block clock
O
0
65
SQCK
Ext. clock for sub code-Q
I
5.0
66
SUBQ
Code for sub. code-Q
O
3.8
67
DMUTE
Mute input
I
0
68
STAT
Status signal
O
5.0
69
/RST
Reset input
I
5.0
70
CSEL
(Connecting to ground)
-
0
71
PMCK
PM clock
O
2.5
72
SMCK
SM clock
O
2.5
73
SUBC
Serial data of sub code
O
0
74
SBCK
Shift clock for SUBC
I
0.6
75
/CLDCK
Not used
-
-
76
/TEST
(Connecting to VDD)
-
5.0
77
X1
Crystal oscillator
-
0.4
78
X2
Crystal oscillator
-
3.2
79
VDD1
+5V power supply
-
5.0
80
VSS1
Ground
-
0
IC301 : MN1873260AB4
Pin
No.
Port
Description
I/O
(V)
1
VDD
+5V power supply
-
5.0
2
OSC2
Crystal oscillator
-
2.2
3
OSC1
Crystal oscillator
-
2.1
4
VSS
Ground
-
0
5
XI
(Connecting to ground)
-
0
6
XO
Not used
-
-
7
CM
(Connecting to ground)
-
0
8
VREFH
Reference voltage
I
5.0
9
SW13
Shuter SW
I
4.9
10
SW12
Horizontal origin
I
4.9
11
SW11
Clump SW
I
0
12
SW10
Play SW
I
0
13
SW4
Shuter SW
I
4.9
14
SW3
Tray origin SW
I
0
15
SW2
Inner SW
I
4.8
16
SW1
Outer SW
I
4.9
17
VREFL
Reference voltage
I
0
18
/RESET
Reset input
I
4.9
19
-
(Ground pull-down)
-
0
20
SCKM
Clock for serial data
I
5.0
21
SIM
CD changer serial data
I
1.3
22
SOM
CD changer serial data
O
4.3
23
SQCK
Ext. clock for sub. code-Q
O
5.0
24
SUBQ
Code for sub. code-Q
I
1.6
25
-
Not used
-
5.0
26
-
(Ground pull-down)
-
0
27
CD.ON
CD changer start/stop
I
5.0
28
-
Not used
-
5.0
29
BLKCK
Sub. code block clock
I
0
30
P.ON
Not used
-
5.0
31
MUTE
Mute output
O
5.0
32
-
(Ground pull-down)
-
0
33
SENS
Servo status
O
0
34
CLVS
Servo status
O
5.0
35
FLOCK
Focus servo lock
O
0.2
36
TLOCK
Tracking servo lock
O
0
37
VMI
Horizontal motor control
O
2.5
38
HMI
Vertical motor control
O
0
39
HVMUTE
H/V motor mute
O
0
40-42 -
(Ground pull-down)
-
0
43
SW9
Disc-in (B) SW
I
0
44
SW8
Disc-in (L) SW
I
0
45
SW7
Disc-in (F) SW
I
0
46
SW6
Disc push SW
I
0
8
HONDA / CQ-EH8160AK
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