Pioneer DEH-P55BT/XN/EW5, Service Manual

Page: 84 / 94

DEH-P55BT/XN/EW5
84
1 2 3 4
1 2 3 4
C
D
F
A
B
E
No. Symbol I/O Explain
1 AMANT I AM antenna input AM antenna input high impedance AMANT pin is connected with
an all antenna by way of 4.7
µ
H. (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.
g
2 RFGND RF ground g Ground of antenna block
3 FMANT I FM antenna input Input of FM antenna 75
Ω
Surge absorber g
(DSP-201M-S00B)
is necessary.
4 VCC power supply The power supply for analog block. D.C 8.4V g
±
0.3V
L O signal level g
6 I chip enable-2 Chip enable for EEPROM ”Low” active
non connection Not used
8 CE1 I chip enable-1 Chip enable for AF•RF ”High g ” active
9 CK I clock Clock
10 I data in Data input
O lock detector “Low” active
12 OSCGND osc ground g Ground of oscillator block
13 ROM_VDD power supply Power supply for EEPROM pin 13 is connected with a power supply of
micro computer.
14 DO O data out Data output
15 DGND digital ground g g Ground of digital block g
16 NC non connection Not used
17 VDD_3.3 power supply The power supply for digital block. 3.3V g
±
0.2V
O RDS clock Output of RDS clock(2.5V)
DS data
20 O RDS lock Output unit “High” active(2.5V) (RDS_LOCK turns over by the
external transistor “Low” active)
21 RDS_HSLK O RDS high speed Output unit “High
lock . “ ” active)
22 AUDIOGND audio ground g Ground of audio block
23 L ch O L channel output FM stereo “L-ch” signal output or AM audio output
24 R ch O R channel output FM stereo “R-ch” signal output or AM audio output
FMRF
ANT adj
RF adj
FM ANT
T51
CF52
RFGND OSCGND DGND AUDIOGND NC VCC VDD_3.3
3.3V
2.5V
IC 4
3.3V 2.5V
←
IC 2
2.5V
NC
CE2
ROM_VDD
SL
DI
CK
CE1
LDET
DO
RDS_CK
RDS_DA
T
A
RDS_LOCK RDS_HSLK
7 6 13 5 10 9 8 11 14 18 19 20 21
1
3
2 12 15 22 16 4 17
IC 1
3.3V
AM ANT
FMRF
ATT
LPF OSC
IC 3 EEPROM
5.0V
IC 5
5V 3.3V
←
ATT
MIXER, IF AMP
DET, FM MPX,
RDS DECODER
24
23
Rch
Lch
-
FM/AM Tuner Unit