Pioneer AVIC-D3/XU/UC Service Manual page 292

1
- FM/AM Tuner Unit (EW5)
A
AM ANT
FMRF
1 ATT
FM ANT
3
ATT
FMRF
B
RF adj
ANT adj
No. Symbol I/O Explain
C
1 AMANT I
2 RFGND
MANT I
4 VCC
5 SL O signal level
6 I
8 CE1 I
9 CK I
D
10 I
O lock detector
12 OSCGND
13 ROM_VDD
14 DO O data out
16 NC
17 VDD_3.3
O RDS clock
E
20 O RDS lock
21 RDS_HSLK O RDS high speed
22 AUDIOGND
23 L ch O L channel output
24 R ch O R channel output
F
292
1
2
7 6 13
IC 3 EEPROM
5.0V
OSC
LPF
IC 1
3.3V
MIXER, IF AMP
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) 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
Input of FM antenna 75 Ω Surge absorber
FM antenna input
power supply The power supply for analog block. D.C 8.4 V
g 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
clock Clock
data in
"Low" active
osc ground g 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 g g Ground of digital block
non connection Not used
power supply The power supply for digital block. 3.3 V
Output of RDS clock(2.5 V)
DS data
Output unit "
Output unit "
lock
audio ground g 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-D3/XU/UC
2
3
5 10 9 8 11 14 18 19 20 21
IC 5
5V 3.3V
IC 4
3.3V 2.5V
2.5V
3.3V
17
g
g
g
g
g " active
g
g
"
" " active)
" " active)
3
4
Rch
24
IC 2
2.5V
Lch
23
DET, FM MPX,
RDS DECODER
is necessary.
± 0.3 V
± 0.2 V
4