Panasonic CQ-EH2280A Service Manual ▷ View online
Pin
No.
No.
Port
Descriptions
I/O
Vol
(V)
(V)
78
X2
Crystal oscillator
-
1.8
79
DVDD1
+3V power supply
-
3.6
80
DVSS
Ground
-
0
IC301 : C2BBGF000364
Pin
No.
No.
Port
Descriptions
I/O
Vol
(V)
(V)
1
PS
Motor power save
O
3.5
2
BR
Brake mode selection
O
0
3
GCTL
Motor G-control
O
1.6
4
SPDCTL
Motor speed control
O
3.5
5
-
Not used
-
-
6
MCLK
Clock for I/F command
O
2.9
7
MDATA
Data for I/F command
O
1.9
8
MLD
I/F command load
O
3.5
9
VSS0
Ground
-
0
10
VDD0
+3V power supply
-
3.5
11
STAT
Status signal
I
1.2
12
FLOCK
Focus servo lock
O
0
13
TLOCK
Tracking servo lock
O
0
14
SENS
Servo status
O
0
15
SIM
CD changer serial data
I
3.1
16
SOM
CD changer serial data
O
2.2
17
SCKM
Serial data shift clock
I
3.2
18
SUBQ
Sub code-Q
I
1.7
19
-
Not used
-
-
20
SQCK
Ext. clock for sub code-Q
O
3.6
21
NRST
Reset output
O
3.6
22
DMUTE
Mute output
O
0
23
MUTE
Mute output
O
0
24
VDD1
+3V power supply
-
3.5
25
AVSS1
Ground
-
0
26
SW15
Feeder SW
I
3.6
27
SW3
Tray H SW
I
3.5
28
SW4
Disc push SW
I
0.5
29
SW5
Disc SW
I
0
30
SW6
Disc load SW
I
0
31
SW7
Eject SW
I
0
32
SW13
Eject2 SW
I
0
33
CLVS
Servo status
O
3.6
34
AVREF
+3V power supply
-
3.6
35
-
Not used
-
-
36
/RESET
Reset
I
3.6
37
XT2
Not used
-
-
38
XT1
(P3V pull-up)
-
3.6
39
IC(VPP)
(Connecting to ground)
-
0
40
X2
Crystal Oscillator
-
2.1
41
X1
Crystal Oscillator
-
1.8
42
VSS1
Ground
-
0
43
CDON
CD changer start/stop
I
3.1
44
BLKCK
Sub code block clock
I
0
45
FG
Flag signal
I
1.9
46
BD0
Drop-out signal
I
0
47
FR
Revolution detection
I
0
48
TRV
Forced traverse control
O
1.9
49
PWM
Not used
-
-
50
VMI+
Horizontal motor control
O
0
51
VMI-
Horizontal motor control
O
0
52
MUTE1
Mute output
O
3.6
53
LODI+
Loading motor control
O
0
54
LODI-
Loading motor control
O
0
55
HMI+
Vertical motor control
O
0
56
HMI-
Vertical motor control
O
0
57
SW1
Inner SW
I
3.6
58
SW2
Tray G SW
I
0
59
SW8
Play SW
I
0
60
SW9
Clump SW
I
3.6
61
SW10
Shuter SW
I
3.6
62
SW11
Horizontal origin SW
I
3.6
63
SW12
Outer2 SW
I
3.7
64
SW14
Outer SW
I
3.6
9
HONDA / CQ-EH2280A
•
•
•
•
Power Supply Voltage : DC13.2V
•
•
•
•
Output Impedance : 4
Ω
•
•
•
•
Output Power : 0.5W
•
•
•
•
Balance, Fader Control : Center
•
•
•
•
Bass, Treble Control : Center
•
•
•
•
Dolby NR: OFF
9 ALIGNMENT INSTRUCTIONS
9.1. Alignment Conditions
Note :
Do not align the FM/AM package block. When the package block is necessary, it will be supplied already aligned at the
factory.
factory.
9.2. Dolby NR Alignment
Step
Alignment Item
Test Tape
VTVM Connection
Adjust
Remarks
(1)
DOLBY NR Rch
RFKZ0038
TP201
VR201
Adjust for 388mV ±1.0dB
(2)
DOLBY NR Lch
RFKZ0038
TP301
VR301
Adjust for 388mV ±1.0dB
9.3. Alignment Points
10
HONDA / CQ-EH2280A
IC301,304 : C0ABCB000038
IC305,612,921 : C0ABBB000179
10 PACKAGE AND IC BLOCK DIAGRAM
10.1. Main Block
PK50 : YEP0PTA514B0
IC191 : YEAMHA1218F
11
HONDA / CQ-EH2280A
IC202,203 : YEAMM5243FT1
IC602 : MN1382KTX
IC201 : C1BB00000284
IC302,303 : YEAMSA571D
IC306 : C0JBAR000066
IC310 : C1BA00000332
12
HONDA / CQ-EH2280A
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