Panasonic CQC1303U - AUTO RADIO/CD DECK, Service Manual

Page: 6 / 30

IC601 : LC7237819D09
Re
f.
No
.
Part No. Part Name &
Description I/O(V) FM(
V)
AM(V
)
CD(V
)
1 XIN 4. 5 MHz X’tal and
Connection
I 2.5
2 2.54 2.53
2 TEST2 GND connection I 0 0 0
3 VREG Bypass condenser
connected. O 2.9
4 2.95 2.95
4 VSSCPU GND connection - 0 0 0
5 N.C.
(CDC_DATA) None - - - -
6 N.C. None - - - -
7 N.C.
(CDC_CLK) None - - - -
8 CDC_REM_OU
T CD changer Remote out O 0 0 0
9 LCD_DO LCD data output I 5.2 5.21 5.21
10 LCD_DI LCD data input O 5.0
1 5.04 5.01
11 LCD_CLK LCD clock O 5.1
4 5.16 5.16
12 LCD_CE LCD chip enable output O 0.1
7 0.17 0.17
13 CD_DO CD data output I 5.3
6 5.38 3.9
14 CD_DI CD data input O 0 0 4.74
15 CD_CLK CD clock O 4.9
6 4.98 4.96
16 CD_CE CD chip enable O 0 0 1.57
17 CD_LM+ CD eject O 0 0 0
18 CD_LM- CD loading O 0 0 0
19 CD_S/L CD 24PIN connection O 0 0 5.19
20 SUB_RDY CD INTB1 connection I 0.1
2 0.1 5.22
21 CD_INSW1 CD insert SW input I 0.1 0.1 0.1
22 CD_SW2 CD MECHA SW2 I 5.1
5 5.7 0.1
23 CD_LIMIT_S
W CD limit SW I 0 0 5.17
24 CD_MUTE CD Mute I 5.3
3 5.35 5.35
25 CD_RST CD reset O 0 0 5.13
26 CD_DMUTE CD_BATT O 0 0 5.18
27 N.C.
(CDC_CNT) None - - - -
28 N.C. None - - - -
29 PANEL Panel detect I 5.2
1 5.22 5.22
30 N.C. GND connection I 0 0 0
31 N.C. GND connection I 0 0 0
32 N.C. GND connection I 0 0 0
33 N.C. None - - - -
34 N.C. None - - - -
35 N.C. None - - - -
36 N.C. None - - - -
37 N.C. None - - - -
38 N.C. None - - - -
39 VDDPORT Power supply of PORT - 5.1
7 5.19 5.19
40 VSSPORT GND of PORT - 0 0 0
41 N.C. None - - - -
42 N.C. None - - - -
43 N.C. None - - - -
44 N.C. None - - - -
45 N.C. None - - - -
46 N.C. None - - - -
47 N.C. None - - - -
48 N.C. None - - - -
49 PWR_CNT Power control O 5.1
5 5.17 5.17
50 AMP_CNT Amp stand-by O 5.1
5 5.17 5.17
Re
f.
No
.
Part No. Part Name &
Description I/O(V) FM(
V)
AM(V
)
CD(V
)
51 AMP_MUTE Amp mute O 5.1
7 5.19 5.19
52 N.C. None - - - -
53 SSC Tuner search
sensitivity change
O 0 0 0
54 AF_MUTE AF mute O 5.1
7 5.19 5.19
55 I2C_DATA Electronic VOL data O 5.1
7 5.19 5.19
56 I2C_CLK Electronic VOL clock O 5.1
7 5.19 5.19
57 ANT_CNT Motor antena control O 5.1
7 5.19 0
58 POWER_LED Power LED O 0.1
5 0.16 0.13
59 N.C. None - - - -
60 N.C. (
BZ_OUT )
None - - - -
61 N.C. None - - - -
62 N.C. None - - - -
63 N.C. None - - - -
64 N.C. None - - - -
65 N.C. None - - - -
66 TEL_MUTE External MUTE input I 0 0 0
67 BATT Battery detection I 5.1
9 5.2 5.2
68 MODE_B ROTARY B input I 5.1 5.17 5.17
69 RDS_CLK RDS clock I 0 0 0
70 REM_IN Remocon data input I 5.1
2 5.14 5.12
71 MODE_A ROTARY A input I 5.1
6 5.17 5.16
72 N.C.
(CDC_STB) None - - - -
73 NC None - - - -
74 MONO Compulsion MONO ON O 0 0 0
75 AM_MODE AM change O 8.1
9 0.13 8.24
76 FM_MODE FM change O 0.1
3 8.18 8.24
77 N.C. GND connection I 0 0 0
78 INIT_C Initial value C I 0 0 0
79 INIT_B Initial value B I 5.1
5 5.17 5.17
80 INIT_A Initial value A I 1.9
3 1.94 1.94
81 VSS GND connection - 0 0 0
82 RDS_DATA RDS data I 0 0 0
83 ST FM stereo input I 5.3
7 5.38 5.39
84 SD_FM/AM Signal detection I 3.3 3.28 0
85 N.C. GND connection I 0 0 0
86 RESET Reset Input I 5.2
(PW
R
OFF
) 5.2(
PWR
OFF) 5.2(
EJEC
T)
87 ACC Power supply I 5.4 5.4 5.41
88 N.C. GND connection I 0 0 0
89 N.C. GND connection I 0 0 0
90 FM/AM_IFC FM/AM IF input I 1.4
6 1.47 0
91 N.C. GND connection I 0 0 0
92 SUBPD None - - - -
93 VDDPLL Power supply of PLL - 5.1
8 5.19 5.2
94 N.C. GND connection I 0 0 0
95 OSC_FM/AM FM/AM osc input I 1.4
6 1.39 0
96 VSSPLL GND connection - 0 0 0
97 N.C. None - - - -
10 TERMINALS DESCRIPTION
10.1. Main Block
6
CQ-C1303U