Read Panasonic CQ-JA1920L / CQ-JA1924L Service Manual online
126
CD SOM
CD serial data
I
0
127
CD SIM
CD serial data
O
1.4
128
MD1
(Connecting to VDD)
-
5.2
Note 1 : Voltage measuerments are with respect to ground,
with a voltmeter (internal resistance : 10M ohms).
with a voltmeter (internal resistance : 10M ohms).
IC901 : C2BBGD000016
Pin
No.
Port
Description
I/O
(V)
1
MSM
MS gain control
O
0
2,3
-
No connection
-
-
4
VSSI
Ground
-
0
5
RX0
Communication data
I
5.2
6
RX1
(+5V pull-up)
-
5.2
7
VDDI
+5V power supply
-
5.2
8
RDI
CAN-BUS data
I
4.9
9
SCLK
Not used
-
-
10
TDO
CAN-BUS data
O
0
11-13 -
No connection
-
-
14
IF+C
IF count
I
4.8
15
ANT+
Motor antenna control
I
0
16
-
No connection
-
-
17
VRL
(Connecting to ground)
-
0
18
VRH
(Connecting to VDD)
-
5.2
19
AMP+
Ext. Amp power
I
4.9
20
VDD
+5V power supply
-
5.2
21
+BMONI
+B monitor
I
3.0
22
SP-L
SP Lch level detection
I
3.0
23
SP-R
SP Rch level detection
I
3.1
24
P-ANT
Antenna short detection
I
1.8
25
-
No connection
-
-
26
CANE
(Connecting to VDD)
-
5.2
27
VPP
(Connecting to VDD)
-
5.2
28
OSC1
Crystal oscillator
-
1.8
29
OSC2
Crystal oscillator
-
2.7
30
/RESET
Reset input
I
0
31
IRQ
(CAN-BUS data)
I
4.9
32,33 -
No connection
-
-
34-36 -
(Connecting to ground)
-
0
37
MODE C
Audio mode selection
O
4.9
38
MODE B
Audio mode selection
O
0
39
MODE A
Audio mode selection
O
0
40
SP CONT
Speaker control
O
0
41
WAKE OUT
CAN BUS request
O
5.2
42
PA2 (NERR)
Error/Time out signal
I
0
43
PA1 (STB)
Data strobe
O
0
44
PA0 (EN)
Chip enable
O
0
45
TX0
Communication data
O
5.2
46
TX1
Not used
-
0
47
-
No connection
-
-
48
T-RDI
CAN-BUS data
I
4.8
49
T-TDO
Not used
-
-
50
T-SCLK
Not used
-
-
51
AS-C
Speaker out mute
O
5.1
52
AS-B
Speaker out mute
O
5.1
53
AS-A
Speaker out mute
O
5.1
54-57 -
No connection
-
-
58
VSS
Ground
-
0
59
M2F
Tape main motor control
O
0
60
MS
Tape MS mode control
O
4.9
61
F/R
Tape F/R control
O
4.9
62
EQ
Metal tape select
O
4.9
63
NRSW
Dolby mode selection
O
0.3
64
-
No connection
-
-
9.2. DSP Block
IC801 : YEAMAK7712AF
Pin
No.
Port
Description
I/O
(V)
1
TSTI
Not used
-
-
2-4
-
(Connecting to ground)
-
0
5
/PD
(Connecting to VDD)
-
5.0
6
/RST
Reset input
I
0
7-9
-
Not used
-
-
10,11 DVB
+5V power supply
-
5.0
12-19 -
Not used
-
-
20
SMODE
(Connecting to VDD)
-
5.0
21-23 -
Not used
-
-
24
DVDD
+5V power supply
-
5.0
25
DVSS
Ground
-
0
26
XTI
Crystal oscillator
-
2.6
27
XTO
Crystal oscillator
-
2.4
28
TSTI2
(Connecting to VDD)
-
5.0
29
/CS
DSP chip select
I
5.2
30
/WRQ
DSP data write request
I
5.2
31
DVSS
Ground
-
0
32
DVDD
+5V power supply
-
5.0
33
SCLK
DSP clock
I
5.2
34
SI
DSP serial data
I
0
35
WRDY
DSP write ready
O
0
36
DRDY
DSP write ready
O
0
37
SO
DSP serial data
O
0
38-48 -
Not used
-
-
49
DVSS
Ground
-
0
50
DVDD
+5V power supply
-
5.0
51-68 -
Not used
-
-
69
DVSS
Ground
-
0
70
DVDD
+5V power supply
-
5.0
71,72
Ground
-
0
73
DVDD
+5V power supply
-
5.0
74,75 DVB
+5V power supply
-
5.0
76-78 -
Not used
-
-
79
AVB
+5V power supply
-
5.0
80,81 AOUT R2,L2
Audio-Rear output
O
2.5
82
NC
No connection
-
-
83,84 AOUT R1,L1
Audio-Front output
O
2.5
85,86
Ground
-
0
87,88
+5V power supply
-
5.0
89
NC
No connection
-
-
90
A IN R-
Audio Rch (-) input
I
2.3
91
A IN R+
Audio Rch (+) input
I
2.5
92
A IN L-
Audio Lch (-) input
I
2.3
93
A IN L+
Audio Lch (+) input
I
2.5
94
VCON
Voltage control
-
2.5
95,96
Ground
-
0
97
AVDD
+5V power supply
-
5.0
98,99
+5V power supply
-
5.0
100
NC
No connecion
-
-
9.3. Display Block
IC611 : C2BBFE000091
Pin
No.
Port
Description
I/O
(V)
1-8
-
Not used
-
-
9
GND
Ground
-
0
10,11 -
Not used
-
-
12
TUNE.UP
Tune up switch
I
0
13
TUNE.DOWN
Tune down switch
I
0
14
VOL.UP
Volume up switch
I
5.0
15
VOL.DWN
Volume down switch
I
0
9
AUDI / CQ-JA1920L / CQ-JA1924L
Click on the first or last page to see other CQ-JA1920L / CQ-JA1924L service manuals if exist.