Pioneer AVIC-N2 Service Manual page 290

1
- FM/AM Tuner Unit (AVIC-N2/XU/UC)
A
AM ANT
FMRF
1 ATT
FM ANT
3
B ATT
FMRF
ANT adj
No. Symbol I/O Explain
C
1 AMANT
2 RFGND
3 FMANT
4 VCC
L
6 CE2
7 WC
8 CE1
D
10 DI
11 NC
12 OSCGND
13 ROM_VDD
14 DO
15 DGND
16 NC
17 VDD_3.3
18 NC
E
19 NC
20 NC
21 NC
22 AUDIOGND
23 L ch
24 R ch
F
290
1
2
7 6
IC 3 EEPROM
5.0V
OSC
IC 1
3.3V
MIXER, IF AMP
RF adj
T51
2 12 15 2 6
I AM antenna input AM antenna input high impedance AMANT pin is connected with
an all antenna by way of 4.7µH. (LAU type inductor) A series circuit
including an inductor and a resistor is connected with RF ground for
the countermeasure against the hum of power transmission line.
RF ground g Ground of antenna block
I FM antenna input Input of FM antenna 75Ω Surge absorber
power supply The power supply for analog block. D.C 8.4V
O signal level g
I chip enable-2
I write control Y Y
Ordinary non connection
I chip enable-1 Chip enable for AF•RF "High
clock Clock
I data in Data input
non connection Not used
osc ground g Ground of oscillator block
power supply Power supply for EEPROM pin 13 is connected with a power supply of
micro computer.
O data out Data output
digital ground g g Ground of digital block
non connection Not used
power supply The power supply for digital block. 3.3V
non connection Not used
non connection Not used
non connection Not used
non connection Not used
audio ground g
O L channel output FM stereo "L-ch" signal output or AM audio output
O R channel output FM stereo "R-ch" signal output or AM audio output
2
3
13 5 10 9 8 11 14 18 19 20 21
IC 5
5V 3.3V
LPF
CF52
CF51
IC 4
3.3V 2.5V
2.5V
3.3V
4 17
g
g
g
"Low" active
g " active
g
g
g
AVIC-N2/XU/UC
3
4
Rch
24
IC 2
2.5V
Lch
23
DET, FM MPX
(DSP-201M-S00B) is necessary.
± 0.3V
"Low".
± 0.2V
4