Pioneer AVIC-X3/XU/EW5 Service Manual page 40

1
- FM/AM Tuner Unit (AVIC-N4/XU/UC)
A
AM ANT
FMRF
1
AT T
FM ANT
B 3
AT T
FMRF
RF adj
ANT adj
C
No. Symbol I/O Explain
1 AMANT I
2 RFGND
3 FMANT I
4 VCC
5 SL O signal level
6 CE2 I
7 NC
8 CE1 I
D
9 CK I
10 DI I
11 NC
12 OSCGND
13 ROM_VDD
14 DO O data out
15 DGND
16 NC
17 VDD_3.3
18 NC
19 NC
E
20 NC
21 NC
22 AUDIOGND
23 L ch O L channel output
24 R ch O R channel output
F
40
1
2
7 6 13
IC 3 EEPROM
5.0 V
OSC LPF
IC 1
3.3 V
MIXER, IF AM P
T51
CF52
2 12 15 22 16 4
AM antenna input AM antenna input high impedance AMANT pin is connected with
an all antenna by way of 4.7 µH. (LAU type inductor)
including an inductor and a resistor is connected with RF ground for
the countermeasure against the hum of power transmission line.
RF ground Ground of antenna block
FM antenna input Input of FM antenna 75 ohm Surge absorber
power supply The power supply for analog block. D.C 8.4 V ± 0.3 V
Output of FM/AM signals level
chip enable-2 Chip enable for EEPROM "Low" active
non connection Not used
chip enable-1 Chip enable for AF•RF "High" active
clock Clock
data in Data input
non connection Not used
osc ground Ground of oscillator block
power supply Power supply for EEPROM pin 13 is connected with a power supply of
micro computer.
Data output
digital ground Ground of digital block
non connection Not used
power supply The power supply for digital block. 3.3 V ± 0.2 V
non connection Not used
non connection Not used
non connection Not used
non connection Not used
audio ground Ground of audio block
FM stereo "L-ch" signal output or AM audio output
FM stereo "R-ch" signal output or AM audio output
AVIC-N4/XU/UC
2
3
5 10 9 8 11 14 18 19 20 21
IC 5
5 V 3.3 V t
IC 4
t
2.5 V
3.3 V 3.3 V 2.5 V
17
3
4
Rch
24
IC 2
2.5 V
Lch
23
DET, FM MPX
A series circuit
is necessary.
(DSP-201M-S00B)
4