Panasonic CQ-C3405U Service Manual page 6

Pin Port Description
No
83 EEP-ROM Serial data for EEPROM
DI/DO
84 EEP-ROM Chip select for EEPROM
CS
85 EEP-ROM Serial clock for EEPROM
CLOCK
86 ANT CNT Not connected
87 VREG Connected to capacitor
88 VSS Ground
89 VDD (PLL) +5V power supply
90 OSC FM/ FM/AM local oscillation
AM frequency
91 N.C. Ground
92 FM/AM IFC FM/AM center frequency
input
93 N.C. Ground
94 EO FM/AM phase detection
error output
95 SUBPD Not connected
96 RDS DATA Not connected
97 SSC SD sensitivity control
98 AMP CNT Power supply control for
External amplifier
99 AF MUTE Audio signal mute
100 AMP MUTE Mute for Power amplifier
4.1.2. Display Block
IC901 : C0HBA0000195
Pin No. Port
1 SEG1/P1 Not connected
2 SEG2/P2 LED ON/OFF signal
3-39 SEG3-39 LCD segment data
40-43 COM1-4 LCD common
44,45 SEG40,41 LCD segment data
46-49 KS3-6 Key scan
50-54 Kl1-5 Key data
55 TEST (Connecting to ground)
56 VDD +5V power supply
57 VDD1 VDD1 filter terminal
58 VDD2 VDD2 filter terminal
59 VSS Ground
60 OSC Oscillator terminal
61 DO Key data output
62 CE LCD driver chip enable
63 CLK LCD clock
64 DI LCD data
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I/O Vol [V]
FM AM CD
I/O 0 0
O 0 0
O 0 0
- 5.0 5.0
- 3.0 3.0 3.0
- 0 0
- 5.0 5.0 5.0
I 1.3 1.3
- 0 0
I 0 0
- 0 0
O 2.2 2.2
- 0 0
- 0 0
O 0 0
O 4.8 4.8 4.8
O 5.0 5.0 5.0
O 5.0 5.0 5.0
Description I/O (V)
-
O 4.7
O 2.4
O 2.4
O 2.4
O 4.7
I 0
- 0
- 4.7
- 3.1
- 1.6
- 0
- 3.7
O 4.7
I 0
I 4.7
I 4.7
0
0
0
0
0
0
0
0
0
0
0
0
0
-
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